Toshiba Ras M10ekcvp E User Manual

FILE NO. A04-015

SERVICE MANUAL

AIR-CONDITIONER

SPLIT TYPE

RAS-B10EKVP-E, RAS-B13EKVP-E

/RAS-M14EAV-E

RAS-M10EKCVP-E, RAS-M13EKCVP-E

/RAS-M14EACV-E

RAS-B10EKVP-E, RAS-B13EKVP-E,

RAS-B16EKVP-E/RAS-M18EAV-E

RAS-M10EKCVP-E, RAS-M13EKCVP-E,

RAS-M16EKCVP-E/RAS-M18EACV-E

1. SAFETY PRECAUTIONS

For general public use

Power supply cord of outdoor unit shall be more than 1.5 mm²(H07RN-F or 245IEC66) polychloroprene sheathed flexible cord.

• Read this “SAFETY PRECAUTIONS” carefully before servicing.

• The precautions described below include the important items regarding safety. Observe them without fail.

• After the servicing work, perform a trial operation to check for any problem.

• Turn off the main power supply switch (or breaker) before the unit maintenance.

CAUTION

New Refrigerant Air Conditioner Installation

• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY OZONE

LAYER.

R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working pressure of

R410A refrigerant is approx. 1.6 times of refrigerant R22. Accompanied with the adoption of the new refrigerant, the refrigeration

machine oil has also been changed. Therefore, during installation work, be sure that water, dust, former refrigerant, or

refrigeration machine oil does not enter into the new type refrigerant R410A air conditioner circuit.

To prevent mixing of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging port on main unit and

installation tools are different from those used for the conventional refrigerant units. Accordingly, special tools are required for the

new refrigerant (R410A) units. For connecting pipes, use new and clean piping materials with high pressure fittings made for

R410A only, so that water and/or dust does not enter. Moreover, do not use the existing piping because there are some problems

with pressure fittings and possible impurities in existing piping.

CAUTION

TO DISCONNECT THE APPLIANCE FROM THE MAIN POWER SUPPLY

This appliance must be connected to the main power supply by a circuit breaker or a switch with a contact separation of at least

3 mm.

The installation fuse (25A D type

) must be used for the power supply line of this air conditioner.

DANGER

• Ask an authorized dealer or qualified installation professional to install/maintain the air conditioner.

Inappropriate servicing may result in water leakage, electric shock or fire.

• TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING ANY ELECTRICAL WORK. MAKE SURE ALL POWER

SWITCHES ARE OFF. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.

DANGER: HIGH VOLTAGE

The high voltage circuit is incorporated.

Be careful to do the check service, as the electric shock may be caused

in case of touching parts on the P.C. board by hand.

• CORRECTLY CONNECT THE CONNECTING CABLE. IF THE CONNECTING CABLE IS INCORRECTLY CONNECTED,

ELECTRIC PARTS MAY BE DAMAGED.

• CHECK THAT THE EARTH WIRE IS NOT BROKEN OR DISCONNECTED BEFORE SERVICE AND INSTALLATION.

FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.

• DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE TO FOLLOW THIS

INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.

• TO PREVENT THE INDOOR UNIT FROM OVERHEATING AND CAUSING A FIRE HAZARD, PLACE THE UNIT WELL

AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEAT REGISTORS, FURNACE, STOVES,

ETC.

• WHEN MOVING THE AIR-CONDITIONER FOR INSTALLATION IN ANOTHER PLACE, BE VERY CAREFUL NOT TO

ALLOW THE SPECIFIED REFRIGERANT (R410A) TO BECOME MIXED WITH ANY OTHER GASEOUS BODY INTO THE

REFRIGERATION CIRCUIT. IF AIR OR ANY OTHER GAS IS MIXED IN THE REFRIGERANT, THE GAS PRESSURE IN

THE REFRIGERATION CIRCUIT WILL BECOME ABNORMALLY HIGH AND IT MAY RESULT IN THE PIPE BURSTING

AND POSSIBLE PERSONNEL INJURIES.

• IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE SERVICE WORK AND THE

INSTALLATION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM. IF THE REFRIGERANT GAS IS HEATED,

SUCH AS BY FIRE, GENERATION OF POISONOUS GAS MAY RESULT.

– 3 –

WARNING

• Never modify this unit by removing any of the safety guards or by-pass any of the safety interlock switches.

• Do not install in a place which cannot bear the weight of the unit. Personal injury and property damage can result if the unit

falls.

• After the installation work, confirm that refrigerant gas does not leak.

If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas may generate.

• The electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Make

sure the air conditioner uses an exclusive circuit.

An insufficient circuit capacity or inappropriate installation may cause fire.

• When wiring, use the specified cables and connect the terminals securely to prevent external forces applied to the

cable from affecting the terminals.

• Be sure to provide grounding.

Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone cables.

• Conform to the regulations of the local electric company when wiring the power supply.

Inappropriate grounding may cause electric shock.

CAUTION

• Exposure of unit to water or other moisture before installation may result in an electrical short. Do not store in a wet

basement or expose to rain or water.

• Do not install in a place that can increase the vibration of the unit. Do not install in a place that can amplify the noise level of

the unit or where noise or discharged air might disturb neighbors.

• To avoid personal injury, be careful when handling parts with sharp edges.

• Perform the specified installation work to guard against an earthquake.

If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.

For Reference:

If a heating operation would be continuously performed for a long time under the condition that the outdoor tem-

perature is 0°C or lower, drainage of defrosted water may be difficult due to freezing of the bottom plate, resulting

in a trouble of the cabinet or fan.

It is recommended to procure an anti freeze heater locally for a safety installation of the air conditioner.

For details, contact the dealer.

– 4 –

2. SPECIFICATIONS

The indoor and outdoor units that can be used in combination are shown in the tables below.

Table of models that can be connected

Type

Outdoor unit

Indoor unit

RAS-B13EKVP–E

RAS-M13UKV–E3

RAS-M13YDV–E

RAS-B13EKVP–E

RAS-M13UKV–E3

RAS-M13YDV–E

RAS-M13EKCVP–E

RAS-M13UKCV–E3

RAS-M13YDCV–E

RAS-M13EKCVP–E

RAS-M13UKCV–E3

RAS-M13YDCV–E

RAS-B10EKVP–E

RAS-M10UKV–E3

RAS-M10YDV–E

RAS-M14EAV–E

Heat pump

RAS-B10EKVP–E

RAS-M10UKV–E3

RAS-M10YDV–E

RAS-B16EKVP–E

RAS-M16UKV–E3

RAS-M16YDV–E

RAS-M18EAV–E

RAS-M14EACV–E

RAS-M18EACV–E

RAS-M10EKCVP–E

RAS-M10UKCV–E3

RAS-M10YDCV–E

RAS-M10EKCVP–E

RAS-M10UKCV–E3

RAS-M10YDCV–E

Cooling-only

RAS-M16EKCVP–E

RAS-M16UKCV–E3

RAS-M16YDCV–E

Table of models that can be used in combination

Type

Heat pump

Outdoor unit

RAS-M14EAV–E

RAS-M18EAV–E

RAS-M14EACV–E

RAS-M18EACV–E

Combinations of indoor unit models that can be connected

10+10, 10+13

10+10, 10+13, 10+16, 13+13

10+10, 10+13

Cooling-only

10+10, 10+13, 10+16, 13+13

NOTES

A 1-room connection is not an option for the indoor units (you cannot connect only one indoor unit). A 2-room connection must

always be used for the indoor units (you must connect two indoor units).

With the RAS-M14EAV-E and RAS-M14EACV-E outdoor unit models, the 13 + 13 combination is not an option.

With the RAS-M18EAV-E and RAS-M18EACV-E outdoor unit models, the 13 + 16 or 16 + 16 combination is not an option.

The contents noted in this service manual limit the indoor units to the RAS-B10EKVP-E, RAS-B13EKVP-E, RAS-

B16EKVP-E, RAS-M10EKCVP-E, RAS-M13EKCVP-E and RAS-M16EKCVP-E. For other indoor units that can also be

used in combination, see the service manual of each indoor unit.

Indoor Unit

RAS-M10UKV-E3

RAS-M13UKV-E3

RAS-M16UKV-E3

File No.

SVM-04015

RAS-M10UKCV-E3

RAS-M13UKCV-E3

RAS-M16UKCV-E3

RAS-M10YDV-E

RAS-M13YDV-E

RAS-M16YDV-E

RAS-M10YDCV-E

RAS-M13YDCV-E

RAS-M16YDCV-E

A02-010

– 5 –

2-1-1 Specifications

Heat pump models

Unit model

Indoor

RAS-B10EKVP-E, RAS-B13EKVP-E, RAS-B16EKVP-E

Outdoor

RAS-M14EAV-E

RAS-M18EAV-E

5.2

Cooling Capacity (kW)

Cooling Capacity range (kW)

Heating Capacity (kW)

Heating Capacity range (kW)

Power supply

4.0

1.4 - 4.5

4.4

1.4 - 6.2

6.7

0.9 - 5.2

0.9 - 8.5

220~240V-1Ph-50Hz / 220V-1Ph-60Hz

Electric

Indoor

Unit model

RAS-B10EKVP-E

RAS-B13EKVP-E

RAS-B16EKVP-E(*1)

charactaristics

(220V/230V/

240V)

Runnning Current (A)

Power Consumption (W)

Power factor (%)

Unit model

0.15

91/87/83

Outdoor

(220V/230V/

240V)

RAS-M14EAV-E

RAS-M18EAV-E

Operation mode

Cooling

Heating

4.43/4.23/4.04

950

Cooling

7.12/6.80/6.50

1540

Heating

Running current

Power Consumption (W)

Power factor (%)

(A)

4.87/4.64/4.44

8.28/7.91/7.57

1020

1790

Starting current (A)

5.17/4.94/4.74

3.70/4.36

7.42/7.10/6.80

3.25/3.62

COP(Cooling/Heating)

Operating noise

dB(A)

Indoor

(Cooling/Heat-

ing)

Unit model

High

RAS-B10EKVP-E

42/43

RAS-B13EKVP-E

RAS-B16EKVP-E(*1)

43/44

34/35

27/27

45/45

36/36

29/29

Medium

33/34

Low

27/27

Outdoor

(Cooling/Heat-

ing)

Unit model

2 indoor units operating

RAS-M14EAV-E

46/48

RAS-B10EKVP-E

RAS-M18EAV-E

48/50

RAS-B16EKVP-E(*1)

Indoor unit

Unit model

RAS-B13EKVP-E

Dimension

(mm)

Hight

Width

Depth

250

790

250

790

250

790

215

Net weight (kg)

Fan motor output (W)

Air flow rate (m³/h) (Cooling/Heating)

Unit model

550/610

560/640

640/660

Outdoor unit

RAS-M14EAV-E

RAS-M18EAV-E

Dimension

(mm)

Hight

Width

Depth

550

780

290

550

780

290

Net weight (kg)

Compressor

Motor output (W)

Type

750

1100

Twin rotary type with DC-inverter variable speed control

Model

DA111A1F-20F1

DA130A1F-25F

Fan motor output (W)

Air flow rate (m³/h)

Type

1820

2100

Flare connection

Piping connec-

tion

Indoor unit

Unit model

RAS-B10EKVP-E

RAS-B13EKVP-E

∅6.35

RAS-B16EKVP-E (*1)

Liquid side

∅6.35

Gas side

∅9.52

∅12.7

Outdoor unit

Unit model

RAS-M14EAV-E

RAS-M18EAV-E

Liquid side/gas side

∅6.35 / 9.52

Maximum length (per unit) (m)

Maximum length (total) (m)

Maximum chargeless length(total) (m)

Maximum height difference (m)

Additional refrigerant

20g/m (pipe length 21m to 30m)

Name of refrigerant

R410A

0.90

R410A

1.20

Weight (kg)

Wiring connection

Power supply

3 Wires : includes earth

Interconnection

4 Wires : includes earth

Usable temperature range (°C)

Indoor (Cooling/Heating)

Outdoor (Cooling/Heating)

Unit model

21 to 32/0 to 27

5 to 43/-10 to 24

Accessory

Indoor unit

RAS-B10EKVP-E

RAS-B13EKVP-E

RAS-B16EKVP-E(*1)

Installation plate

Wireless remote controller

Batteries

Remote control holder

Zeolite-plus filter

Plasma Pure filter

Remote controller

holder mounting screw

2 (∅3.1×16L)

Owner’s manual

Mounting screw

Installation manual

Unit model

6 (∅4×25L)

Outdoor unit

RAS-M14EAV-E

RAS-M18EAV-E

Installation manual

Specifications

Drain nipple

Water-proof rubber cap

• (*1) The RAS-B16EKVP-E cannot be used in combination with the RAS-M14EAV-E.

• For performance when each indoor unit is combined with other unit, refer to the separate table.

• The specifications may be subject to change without notice for purpose of improvement.

– 6 –

2-1-2 Specifications

Cooling-only models

Unit model

Indoor

RAS-M10EKCVP-E, RAS-M13EKCVP-E, RAS-M16EKCVP-E

Outdoor

RAS-M14EACV-E

RAS-M18EACV-E

Cooling Capacity (kW)

Cooling Capacity range (kW)

Heating Capacity (kW)

Heating Capacity range (kW)

Power supply

4.0

5.2

1.4 - 6.2

–

1.4 - 4.5

–

220~240V-1Ph-50Hz / 220V-1Ph-60Hz

Electric

Indoor

Unit model

RAS-M10EKCVP-E

RAS-M13EKCVP-E

RAS-M16EKCVP-E(*1)

charactaristics

(220V/230V/

240V)

Runnning Current (A)

Power Consumption (W)

Power factor (%)

Unit model

0.15

91/87/83

Outdoor

(220V/230V/

240V)

RAS-M14EACV-E

RAS-M18EACV-E

Operation mode

Cooling

Heating

Cooling

Heating

Running current

Power Consumption (W)

Power factor (%)

(A)

4.87/4.64/4.44

–

7.12/6.80/6.50

–

1020

1540

Starting current (A)

5.17/4.94/4.74

3.70/–

7.42/7.10/6.80

3.25/–

COP(Cooling/Heating)

Operating noise

dB(A)

Indoor

(Cooling/Heat-

ing)

Unit model

High

RAS-M10EKCVP-E

RAS-M13EKCVP-E

RAS-M16EKCVP-E(*1)

42/–

33/–

27/–

43/–

34/–

27/–

45/–

36/–

29/–

Medium

Low

Outdoor

(Cooling/Heat-

ing)

Unit model

2 indoor units operating

RAS-M14EACV-E

46/–

RAS-M10EKCVP-E

RAS-M18EACV-E

48/–

RAS-M16EKCVP-E(*1)

Indoor unit

Unit model

RAS-M13EKCVP-E

Dimension

(mm)

Hight

Width

Depth

250

790

215

250

790

215

250

790

215

Net weight (kg)

Fan motor output (W)

Air flow rate (m³/h) (Cooling/Heating)

Unit model

550/–

560/–

640/–

Outdoor unit

RAS-M14EACV-E

RAS-M18EACV-E

Dimension

(mm)

Hight

Width

Depth

550

780

290

550

780

290

Net weight (kg)

Compressor

Motor output (W)

Type

750

1100

Twin rotary type with DC-inverter variable speed control

Model

DA111A1F-20F1

DA130A1F-25F

Fan motor output (W)

Air flow rate (m³/h)

Type

1820

2100

Flare connection

Piping connec-

tion

Indoor unit

Unit model

RAS-M10EKCVP-E

RAS-M13EKCVP-E

∅6.35

RAS-M16EKCVP-E (*1)

Liquid side

∅6.35

Gas side

∅9.52

∅12.7

Outdoor unit

Unit model

RAS-M14EACV-E

RAS-M18EACV-E

Liquid side/gas side

∅6.35 / 9.52

Maximum length (per unit) (m)

Maximum length (total) (m)

Maximum chargeless length(total) (m)

Maximum height difference (m)

Additional refrigerant

20g/m (pipe length 21m to 30m)

Name of refrigerant

R410A

0.90

R410A

1.20

Weight (kg)

Wiring connection

Power supply

3 Wires : includes earth

Interconnection

4 Wires : includes earth

Usable temperature range (°C)

Indoor (Cooling/Heating)

Outdoor (Cooling/Heating)

Unit model

21 to 32/0 to 27

5 to 43/-10 to 24

Accessory

Indoor unit

RAS-M10EKCVP-E

RAS-M13EKCVP-E

RAS-M16EKCVP-E(*1)

Installation plate

Wireless remote controller

Batteries

Remote control holder

Zeolite-plus filter

Plasma Pure filter

Remote controller

holder mounting screw

2 (∅3.1×16L)

Owner’s manual

Mounting screw

Installation manual

Unit model

6 (∅4×25L)

Outdoor unit

RAS-M14EACV-E

RAS-M18EACV-E

Installation manual

Specifications

Drain nipple

Water-proof rubber cap

• (*1) The RAS-M16EKCVP-E cannot be used in combination with the RAS-M14EACV-E.

• For performance when each indoor unit is combined with other unit, refer to the separate table.

• The specifications may be subject to change without notice for purpose of improvement.

– 7 –

2-2 Performance specifications combinations of indoor unit

<Cooling> RAS-M14EAV-E, RAS-M14EACV-E

Volts

Operating indoor unit Unit capacity (kW)

Capacity (kW)

Running current

Power Consumption

Operation

Mode

Operation

Status

–

2.5

2.5 (1.1 to 3.2)

3.05 (1.10 to 4.30)

570 (170 to 880)

1 unit

–

3.5

1.95

2.33

2.5

–

3.5 (1.1 to 3.8)

3.9 (1.4 to 4.4)

4.0 (1.4 to 4.5)

2.5 (1.1 to 3.2)

3.5 (1.1 to 3.8)

3.9 (1.4 to 4.4)

4.0 (1.4 to 4.5)

2.5 (1.1 to 3.2)

3.5 (1.1 to 3.8)

3.9 (1.4 to 4.4)

4.0 (1.4 to 4.5)

5.26 (1.10 to 6.06)

5.12 (1.49 to 6.11)

5.17 (1.49 to 6.16)

2.92 (1.06 to 4.11)

5.03 (1.06 to 5.80)

4.90 (1.43 to 5.84)

4.94 (1.43 to 5.89)

2.79 (1.01 to 3.94)

4.82 (1.01 to 5.56)

4.69 (1.37 to 5.60)

4.74 (1.37 to 5.64)

1100 (170 to 1280)

1070 (230 to 1290)

1080 (230 to 1300)

570 (170 to 880)

220

1.95

1.67

–

2 units

1 unit

–

3.5

–

1100 (170 to 1280)

1070 (230 to 1290)

1080 (230 to 1300)

570 (170 to 880)

Cooling

230

240

–

1.95

2.33

2.5

1.95

1.67

–

2 units

1 unit

–

3.5

–

1100 (170 to 1280)

1070 (230 to 1290)

1080 (230 to 1300)

1.95

2.33

1.95

1.67

2 units

<Heating> RAS-M14EAV-E

Volts

Operating indoor unit

Unit capacity (kW)

Capacity (kW)

Running current

Power Consumption

Operation

Mode

Operation

Status

–

3.2

3.2 (0.5 to 4.4)

4.07 (0.84 to 6.00)

850 (130 to 1280)

1 unit

–

4.2

2.15

2.50

3.2

–

4.2 (0.5 to 4.7)

4.3 (0.9 to 5.1)

4.4 (0.9 to 5.2)

3.2 (0.5 to 4.4)

4.2 (0.5 to 4.7)

4.3 (0.9 to 5.1)

4.4 (0.9 to 5.2)

3.2 (0.5 to 4.4)

4.2 (0.5 to 4.7)

4.3 (0.9 to 5.1)

4.4 (0.9 to 5.2)

5.86 (0.84 to 6.33)

4.59 (1.10 to 5.76)

4.73 (1.10 to 5.86)

3.89 (0.81 to 5.74)

5.60 (0.81 to 6.05)

4.39 (1.06 to 5.51)

4.53 (1.06 to 5.60)

3.73 (0.77 to 5.50)

5.37 (0.77 to 5.80)

4.21 (1.01 to 5.28)

4.34 (1.01 to 5.37)

1250 (130 to 1350)

980 (170 to 1230)

1010 (170 to 1250)

850 (130 to 1280)

1250 (130 to 1350)

980 (170 to 1230)

1010 (170 to 1250)

850 (130 to 1280)

1250 (130 to 1350)

980 (170 to 1230)

1010 (170 to 1250)

220

2.15

1.90

–

2 units

1 unit

–

4.2

–

Heating

230

240

–

2.15

2.50

3.2

2.15

1.90

–

2 units

1 unit

–

4.2

–

2.15

2.50

2.15

1.90

2 units

The above specification values are those under the conditions

Cooling Indoor: DB/WB=27/19°C

Outdoor: DB=35°C

Heating Indoor: DB=20°C

Outdoor: DB/WB=7/6°C

– 8 –

<Cooling> RAS-M18EAV-E , RAS-M18EACV-E

Volts

Operating indoor unit

Unit capacity (kW)

Capacity (kW)

Running current

Power Consumption

Operation

mode

Operation

Status

–

2.7

2.7 (1.1 to 3.2)

3.03 (1.43 to 3.83)

600 (220 to 800)

1 unit

–

3.7

4.5

–

3.7 (1.1 to 4.2)

4.5 (1.1 to 4.9)

5.1 (1.4 to 6.1)

5.2 (1.4 to 6.2)

2.7 (1.1 to 3.2)

3.7 (1.1 to 4.2)

4.5 (1.1 to 4.9)

5.1 (1.4 to 6.1)

5.2 (1.4 to 6.2)

2.7 (1.1 to 3.2)

3.7 (1.1 to 4.2)

4.5 (1.1 to 4.9)

5.1 (1.4 to 6.1)

5.2 (1.4 to 6.2)

5.10 (1.43 to 6.49)

6.96 (1.43 to 7.88)

7.19 (1.69 to 9.97)

7.42 (1.69 to 10.06)

2.90 (1.37 to 3.66)

4.88 (1.37 to 6.21)

6.65 (1.37 to 7.54)

6.88 (1.61 to 9.54)

7.10 (1.61 to 9.63)

2.78 (1.31 to 3.51)

4.68 (1.31 to 5.95)

6.38 (1.31 to 7.23)

6.59 (1.55 to 9.14)

6.80 (1.55 to 9.23)

1100 (220 to 1400)

1500 (220 to 1700)

1550 (260 to 2150)

1600 (260 to 2170)

600 (220 to 800)

–

220

–

2.55

2.85

2.60

3.25

2.7

2.55

2.35

2.60

1.95

–

2 units

1 unit

–

3.7

–

1100 (220 to 1400)

1500 (220 to 1700)

1550 (260 to 2150)

1600 (260 to 2170)

600 (220 to 800)

–

4.5

–

Cooling

230

–

2.55

2.85

2.60

3.25

2.7

2.55

2.35

2.60

1.95

–

2 units

1 unit

–

3.7

–

1100 (220 to 1400)

1500 (220 to 1700)

1550 (260 to 2150)

1600 (260 to 2170)

–

4.5

–

240

2.55

2.85

2.60

3.25

2.55

2.35

2.60

1.95

2 units

<Heating>RAS-M18EAV-E

Volts

Operating indoor unit

Unit capacity (kW)

Capacity (kW)

Running current

Power Consumption

Operation

mode

Operation

Status

4.0

4.0 (0.7 to 5.2)

5.0 (0.7 to 6.5)

5.5 (0.7 to 6.9)

6.5 (0.9 to 8.2)

6.7 (0.9 to 8.5)

4.0 (0.7 to 5.2)

5.0 (0.7 to 6.5)

5.5 (0.7 to 6.9)

6.5 (0.9 to 8.2)

6.7 (0.9 to 8.5)

4.0 (0.7 to 5.2)

5.0 (0.7 to 6.5)

5.5 (0.7 to 6.9)

6.5 (0.9 to 8.2)

6.7 (0.9 to 8.5)

5.57 (1.10 to 7.88)

8.35 (1.10 to 11.73)

8.81 (1.10 to 11.73)

8.35 (1.30 to 11.09)

8.58 (1.30 to 11.36)

5.32 (1.06 to 7.54)

7.99 (1.06 to 11.22)

8.43 (1.06 to 11.22)

7.99 (1.24 to 10.60)

8.21 (1.24 to 10.87)

5.10 (1.01 to 7.23)

7.65 (1.01 to 10.76)

8.08 (1.01 to 10.76)

7.65 (1.19 to 10.16)

7.87 (1.19 to 10.42)

1200 (170 to 1700)

1800 (170 to 2530)

1900 (170 to 2530)

1800 (200 to 2390)

1850 (200 to 2450)

1200 (170 to 1700)

1800 (170 to 2530)

1900 (170 to 2530)

1800 (200 to 2390)

1850 (200 to 2450)

1200 (170 to 1700)

1800 (170 to 2530)

1900 (170 to 2530)

1800 (200 to 2390)

1850 (200 to 2450)

1 unit

5.0

5.5

220

3.25

3.51

3.35

3.88

4.0

3.25

3.19

3.35

2.82

2 units

1 unit

5.0

5.5

Heating

230

3.25

3.51

3.35

3.88

4.0

3.25

3.19

3.35

2.82

2 units

1 unit

5.0

5.5

240

3.25

3.51

3.35

3.88

3.25

3.19

3.35

2.82

2 units

The above specification values are those under the conditions

Cooling Indoor: DB/WB=27/19°C

Outdoor: DB=35°C

Heating Indoor: DB=20°C

Outdoor: DB/WB=7/6°C

– 9 –

2-2-1. Operation Characteristic Curve

<Cooling> RAS-M14EAV-E, RAS-M14EACV-E

<Heating> RAS-M14EAV-E

• Conditions

Indoor : DB 20˚C

Outdoor : DB 7˚C/WB 6˚C

Air flow : High

Pipe length : 7.5m x 2

2 units operating

230V

• Conditions

Indoor : DB 27˚C/WB 19˚C

Outdoor : DB 35˚C

Air flow : High

Pipe length : 7.5m x 2

2 units operating

230V

Compressor speed (rps)

2-2-2. Capacity Variation Ratio According to Temperature

RAS-M14EAV-E, RAS-M14EACV-E

115

105

100

• Conditions

Indoor : DB 27˚C

110

105

100

Outdoor : DB 35˚C

Indoor air flow : High

Pipe length : 7.5m x 2

2 units operating

• Conditions

Indoor : DB 27˚C/WB 19˚C

Indoor air flow : High

Pipe length : 7.5m x 2

2 units operating

32 33 34 35 36 37 38 39 40 41 42 43

Indoor air wet bulb temp. (˚C)

Outdoor temp. (˚C)

Capacity ratio : 100% = 4.0 kW

– 10 –

2-2-3. Operation Characteristic Curve

<Cooling> RAS-M18EAV-E, RAS-M18EACV-E

<Heating> RAS-M18EAV-E

• Conditions

Indoor : DB 27˚C/WB 19˚C

Outdoor : DB 35˚C

Air flow : High

Pipe length : 7.5m x 2

2 units operating

230V

• Conditions

Indoor : DB 20˚C

Outdoor : DB 7˚C/WB 6˚C

Air flow : High

Pipe length : 7.5m x 2

2 units operating

230V

100

120

140

Compressor speed (rps)

2-2-4. Capacity Variation Ratio According to Temperature

RAS-M18EAV-E, RAS-M18EACV-E

115

105

• Conditions

100

Indoor : DB 27˚C

110

105

100

Outdoor : DB 35˚C

Indoor air flow : High

Pipe length : 7.5m x 2

2 units operating

• Conditions

Indoor : DB 27˚C/WB 19˚C

Indoor air flow : High

Pipe length : 7.5m x 2

2 units operating

32 33 34 35 36 37 38 39 40 41 42 43

Indoor air wet bulb temp. (˚C)

Outdoor temp. (˚C)

Capacity ratio : 100% = 5.2 kW

– 11 –

3. REFRIGERANT R410A

This air conditioner adopts the new refrigerant HFC

(R410A) which does not damage the ozone layer.

(6) When an air conditioning system charged with a

large volume of refrigerant is installed in a small

room, it is necessary to exercise care so that,

even when refrigerant leaks, its concentration

does not exceed the marginal level.

The working pressure of the new refrigerant R410A is

1.6 times higher than conventional refrigerant (R22).

The refrigerating oil is also changed in accordance

with change of refrigerant, so be careful that water,

dust, and existing refrigerant or refrigerating oil are

not entered in the refrigerant cycle of the air condi-

tioner using the new refrigerant during installation

work or servicing time.

If the refrigerant gas leakage occurs and its

concentration exceeds the marginal level, an

oxygen starvation accident may result.

(7) Be sure to carry out installation or removal

according to the installation manual.

The next section describes the precautions for air

conditioner using the new refrigerant. Conforming to

contents of the next section together with the general

cautions included in this manual, perform the correct

and safe work.

Improper installation may cause refrigeration

trouble, water leakage, electric shock, fire, etc.

(8) Unauthorized modifications to the air conditioner

may be dangerous. If a breakdown occurs

please call a qualified air conditioner technician

or electrician.

3-1. Safety During Installation/Servicing

Improper repair’s may result in water leakage,

electric shock and fire, etc.

As R410A’s pressure is about 1.6 times higher than

that of R22, improper installation/servicing may

cause a serious trouble. By using tools and materi-

als exclusive for R410A, it is necessary to carry out

installation/servicing safely while taking the following

precautions into consideration.

3-2. Refrigerant Piping Installation

3-2-1. Piping Materials and Joints Used

For the refrigerant piping installation, copper pipes

and joints are mainly used. Copper pipes and joints

suitable for the refrigerant must be chosen and

installed. Furthermore, it is necessary to use clean

copper pipes and joints whose interior surfaces are

less affected by contaminants.

(1) Never use refrigerant other than R410A in an air

conditioner which is designed to operate with

R410A.

If other refrigerant than R410A is mixed, pressure

in the refrigeration cycle becomes abnormally

high, and it may cause personal injury, etc. by a

rupture.

(1) Copper Pipes

It is necessary to use seamless copper pipes

which are made of either copper or copper alloy

and it is desirable that the amount of residual oil

is less than 40 mg/10 m. Do not use copper

pipes having a collapsed, deformed or discolored

portion (especially on the interior surface).

(2) Confirm the used refrigerant name, and use tools

and materials exclusive for the refrigerant

R410A.

The refrigerant name R410A is indicated on the

visible place of the outdoor unit of the air condi-

tioner using R410A as refrigerant. To prevent

mischarging, the diameter of the service port

differs from that of R22.

Otherwise, the expansion valve or capillary tube

may become blocked with contaminants.

As an air conditioner using R410A incurs pres-

sure higher than when using R22, it is necessary

to choose adequate materials.

(3) If a refrigeration gas leakage occurs during

installation/servicing, be sure to ventilate fully.

Thicknesses of copper pipes used with R410A

are as shown in Table 3-2-1. Never use copper

pipes thinner than 0.8 mm even when it is

available on the market.

If the refrigerant gas comes into contact with fire,

a poisonous gas may occur.

(4) When installing or removing an air conditioner, do

not allow air or moisture to remain in the refrig-

eration cycle. Otherwise, pressure in the refrig-

eration cycle may become abnormally high so

that a rupture or personal injury may be caused.

(5) After completion of installation work, check to

make sure that there is no refrigeration gas

leakage.

If the refrigerant gas leaks into the room, coming

into contact with fire in the fan-driven heater,

space heater, etc., a poisonous gas may occur.

– 12 –

Table 3-2-1 Thicknesses of annealed copper pipes

Thickness (mm)

Nominal diameter

Outer diameter (mm)

R410A

0.80

R22

0.80

1.00

1/4

3/8

1/2

5/8

6.35

9.52

0.80

12.70

15.88

0.80

1.00

(2) Joints

b) Socket Joints

For copper pipes, flare joints or socket joints are

used. Prior to use, be sure to remove all contami-

nants.

Socket joints are such that they are brazed

for connections, and used mainly for thick

pipings whose diameter is larger than 20 mm.

a) Flare Joints

Thicknesses of socket joints are as shown in

Table 3-2-2.

Flare joints used to connect the copper pipes

cannot be used for pipings whose outer

diameter exceeds 20 mm. In such a case,

socket joints can be used.

Sizes of flare pipe ends, flare joint ends and

flare nuts are as shown in Tables 3-2-3 to 3-2-

6 below.

Table 3-2-2 Minimum thicknesses of socket joints

Reference outer diameter of

Minimum joint thickness

(mm)

Nominal diameter

copper pipe jointed (mm)

1/4

3/8

1/2

5/8

6.35

9.52

0.50

0.60

0.70

0.80

12.70

15.88

(1) Flare Processing Procedures and Precautions

a) Cutting the Pipe

3-2-2. Processing of Piping Materials

When performing the refrigerant piping installation,

care should be taken to ensure that water or dust

does not enter the pipe interior, that no other oil other

than lubricating oils used in the installed air condi-

tioner is used, and that refrigerant does not leak.

When using lubricating oils in the piping processing,

use such lubricating oils whose water content has

been removed. When stored, be sure to seal the

container with an airtight cap or any other cover.

By means of a pipe cutter, slowly cut the pipe

so that it is not deformed.

b) Removing Burrs and Chips

If the flared section has chips or burrs,

refrigerant leakage may occur. Carefully

remove all burrs and clean the cut surface

before installation.

c) Insertion of Flare Nut

– 13 –

d) Flare Processing

Make certain that a clamp bar and copper

pipe have been cleaned.

ØD

By means of the clamp bar, perform the flare

processing correctly.

Use either a flare tool for R410A or conven-

tional flare tool.

Flare processing dimensions differ according

to the type of flare tool. When using a

conventional flare tool, be sure to secure

“dimension A” by using a gauge for size

adjustment.

Fig. 3-2-1 Flare processing dimensions

Table 3-2-3 Dimensions related to flare processing for R410A

A (mm)

Conventional flare tool

Outer

diameter

(mm)

Nominal

diameter

Thickness

(mm)

Flare tool for R410A

clutch type

Clutch type

1.0 to 1.5

Wing nut type

1.5 to 2.0

1/4

3/8

1/2

5/8

6.35

9.52

0.8

1.0

0 to 0.5

1.5 to 2.0

12.70

15.88

2.0 to 2.5

Table 3-2-4 Dimensions related to flare processing for R22

A (mm)

Outer

diameter

(mm)

Nominal

diameter

Thickness

(mm)

Conventional flare tool

Flare tool for R410A

clutch type

Clutch type

0.5 to 1.0

Wing nut type

1.0 to 1.5

1/4

3/8

1/2

5/8

6.35

9.52

0.8

1.0

0 to 0.5

1.0 to 1.5

12.70

15.88

1.5 to 2.0

Table 3-2-5 Flare and flare nut dimensions for R410A

Outer

diameter

(mm)

Dimension (mm)

Flare nut

width

(mm)

Nominal

diameter

Thickness

(mm)

1/4

3/8

1/2

5/8

6.35

9.52

0.8

1.0

9.1

9.2

6.5

13.2

16.6

19.7

13.5

16.0

19.0

9.7

12.70

15.88

12.9

16.0

– 14 –

Table 3-2-6 Flare and flare nut dimensions for R22

Outer

diameter

(mm)

Dimension (mm)

Thickness

Flare nut

width

(mm)

Nominal

diameter

(mm)

1/4

3/8

1/2

5/8

3/4

6.35

9.52

0.8

1.0

9.0

9.2

6.5

13.0

16.2

19.7

23.3

13.5

16.0

19.0

24.0

9.7

12.70

15.88

19.05

12.9

16.0

19.2

Fig. 3-2-2 Relations between flare nut and flare seal surface

(2) Flare Connecting Procedures and Precautions

When it is strong, the flare nut may crack and

may be made non-removable. When choosing

the tightening torque, comply with values

designated by manufacturers.Table 3-2-7

shows reference values.

a) Make sure that the flare and union portions do

not have any scar or dust, etc.

b) Correctly align the processed flare surface

with the union axis.

NOTE :

c) Tighten the flare with designated torque by

means of a torque wrench. The tightening

torque for R410A is the same as that for

conventional R22. Incidentally, when the

torque is weak, the gas leakage may occur.

When applying oil to the flare surface, be sure to use

oil designated by the manufacturer. If any other oil is

used, the lubricating oils may deteriorate and cause

the compressor to burn out.

Table 3-2-7 Tightening torque of flare for R410A [Reference values]

Outer

diameter

(mm)

Tightening torque of torque

wrenches available on the market

N•m (kgf•cm)

Nominal

diameter

Tightening torque

N•m (kgf•cm)

1/4

3/8

1/2

5/8

6.35

9.52

14 to 18 (140 to 180)

33 to 42 (330 to 420)

50 to 62 (500 to 620)

63 to 77 (630 to 770)

16 (160), 18 (180)

42 (420)

12.70

15.88

55 (550)

65 (650)

– 15 –

3-3. Tools

3-3-1. Required Tools

The service port diameter of packed valve of the outdoor unit in the air conditioner using R410A is changed to

prevent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing dimensions and

opposite side dimension of flare nut (For Ø12.7 copper pipe) of the refrigerant piping are lengthened.

The used refrigerating oil is changed, and mixing of oil may cause a trouble such as generation of sludge,

clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types.

(1) Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))

(2) Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)

(3) Tools commonly used for R410A and for conventional refrigerant (R22)

The table below shows the tools exclusive for R410A and their interchangeability.

Tools exclusive for R410A (The following tools for R410A are required.)

Tools whose specifications are changed for R410A and their interchangeability

R410A

Conventional air

conditioner installation

air conditioner installation

No.

Used tool

Usage

Whether

Existence of

Whether new equipment

can be used with

conventional refrigerant

conventional

new equipment

equipment

for R410A

can be used

Flare tool

Pipe flaring

Yes

(Note 1)

Copper pipe gauge for Flaring by

adjusting projection

margin

conventional flare

tool

(Note 1)

Torque wrench

(For Ø12.7)

Connection of flare

nut

Yes

Evacuating,

refrigerant charge,

run check, etc.

Gauge manifold

Charge hose

Vacuum pump adapter Vacuum evacuating

Yes

Electronic balance for

Refrigerant charge

refrigerant charging

Refrigerant cylinder

Leakage detector

Charging cylinder

Refrigerant charge

Gas leakage check

Refrigerant charge

Yes

(Note 2)

(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection

margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.

(Note 2) Charging cylinder for R410A is being currently developed.

General tools (Conventional tools can be used.)

In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary

as the general tools.

(1) Vacuum pump

(5) Pipe bender

(10) Hexagon wrench

(Opposite side 4mm)

Use vacuum pump by

attaching vacuum pump adapter.

(6) Level vial

(11) Tape measure

(12) Metal saw

(7) Screwdriver (+, –)

(8) Spanner or Monkey wrench

(9) Hole core drill (Ø65)

(2) Torque wrench (For Ø6.35, Ø9.52)

(3) Pipe cutter

(4) Reamer

Also prepare the following equipments for other installation method and run check.

(3) Insulation resistance tester

(1) Clamp meter

(2) Thermometer

(4) Electroscope

– 16 –

3-4. Recharging of Refrigerant

When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the

following steps.

Recover the refrigerant, and check no refrigerant

remains in the equipment.

When the compound gauge’s pointer has indicated

–0.1 Mpa (–76 cmHg), place the handle Low in the

fully closed position, and turn off the vacuum pump’s

power switch.

Connect the charge hose to packed valve service

port at the outdoor unit’s gas side.

Keep the status as it is for 1 to 2 minutes, and ensure

that the compound gauge’s pointer does not return.

Connect the charge hose to the vacuum pump

adapter.

Set the refrigerant cylinder to the electronic balance,

connect the connecting hose to the cylinder and the

connecting port of the electronic balance, and charge

liquid refrigerant.

Open fully both packed valves at liquid and gas

sides.

(For refrigerant charging, see the figure below.)

Place the handle of the gauge manifold Low in the

fully opened position, and turn on the vacuum pump’s

power switch. Then, evacuating the refrigerant in the

cycle.

(1) Never charge refrigerant exceeding the specified amount.

(2) If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode.

(3) Do not carry out additional charging.

When additional charging is carried out if refrigerant leaks, the refrigerant composition changes in the

refrigeration cycle, that is characteristics of the air conditioner changes, refrigerant exceeding the

specified amount is charged, and working pressure in the refrigeration cycle becomes abnormally high

pressure, and may cause a rupture or personal injury.

(INDOOR unit)

(Liquid side)

(Gas side)

(OUTDOOR unit)

Opened

Refrigerant cylinder

(With siphon pipe)

Check valve

Opened

Open/Close valve

for charging

Service port

Electronic balance for refrigerant charging

Fig. 3-4-1 Configuration of refrigerant charging

– 17 –

(1) Be sure to make setting so that liquid can be charged.

(2) When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down.

It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant.

Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the

cylinder upside down if cylinder is not equipped with siphon.

[ Cylinder with siphon ]

[ Cylinder without siphon ]

Gauge manifold

OUTDOOR unit

c y l i n d e r

a n t i g e r R e f r

Refrigerant

cylinder

Electronic

balance

Electronic

balance

Siphon

R410A refrigerant is HFC mixed refrigerant.

Therefore, if it is charged with gas, the composi-

tion of the charged refrigerant changes and the

characteristics of the equipment varies.

Fig. 3-4-2

3-5. Brazing of Pipes

(1) Phosphor bronze brazing filler tends to react

with sulfur and produce a fragile compound

water solution, which may cause a gas

leakage. Therefore, use any other type of

brazing filler at a hot spring resort, etc., and

coat the surface with a paint.

3-5-1. Materials for Brazing

(1) Silver brazing filler

Silver brazing filler is an alloy mainly composed

of silver and copper. It is used to join iron, copper

or copper alloy, and is relatively expensive

though it excels in solderability.

(2) When performing brazing again at time of

servicing, use the same type of brazing filler.

(2) Phosphor bronze brazing filler

Phosphor bronze brazing filler is generally used

to join copper or copper alloy.

3-5-2. Flux

(1) Reason why flux is necessary

(3) Low temperature brazing filler

• By removing the oxide film and any foreign

matter on the metal surface, it assists the flow

of brazing filler.

Low temperature brazing filler is generally called

solder, and is an alloy of tin and lead. Since it is

weak in adhesive strength, do not use it for

refrigerant pipes.

• In the brazing process, it prevents the metal

surface from being oxidized.

• By reducing the brazing filler’s surface tension,

the brazing filler adheres better to the treated

metal.

– 18 –

(2) Characteristics required for flux

3-5-3. Brazing

• Activated temperature of flux coincides with

the brazing temperature.

As brazing work requires sophisticated techniques,

experiences based upon a theoretical knowledge, it

must be performed by a person qualified.

• Due to a wide effective temperature range, flux

is hard to carbonize.

In order to prevent the oxide film from occurring in

the pipe interior during brazing, it is effective to

proceed with brazing while letting dry Nitrogen gas

(N2) flow.

• It is easy to remove slag after brazing.

• The corrosive action to the treated metal and

brazing filler is minimum.

• It excels in coating performance and is harm-

less to the human body.

Never use gas other than Nitrogen gas.

(1) Brazing method to prevent oxidation

As the flux works in a complicated manner as

described above, it is necessary to select an

adequate type of flux according to the type and

shape of treated metal, type of brazing filler and

brazing method, etc.

1) Attach a reducing valve and a flow-meter to

the Nitrogen gas cylinder.

2) Use a copper pipe to direct the piping mate-

rial, and attach a flow-meter to the cylinder.

(3) Types of flux

• Noncorrosive flux

3) Apply a seal onto the clearance between the

piping material and inserted copper pipe for

Nitrogen in order to prevent backflow of the

Nitrogen gas.

Generally, it is a compound of borax and boric

acid.

It is effective in case where the brazing

temperature is higher than 800°C.

4) When the Nitrogen gas is flowing, be sure to

keep the piping end open.

• Activated flux

Most of fluxes generally used for silver brazing

are this type.

5) Adjust the flow rate of Nitrogen gas so that it

is lower than 0.05 m³/Hr or 0.02 MPa

(0.2kgf/cm²) by means of the reducing valve.

It features an increased oxide film removing

capability due to the addition of compounds

such as potassium fluoride, potassium chloride

and sodium fluoride to the borax-boric acid

compound.

6) After performing the steps above, keep the

Nitrogen gas flowing until the pipe cools down

to a certain extent (temperature at which

pipes are touchable with hands).

7) Remove the flux completely after brazing.

(4) Piping materials for brazing and used brazing

filler/flux

Piping

material

Used brazing

filler

Used

flux

Copper - Copper Phosphor copper Do not use

Copper - Iron

Iron - Iron

Silver

Paste flux

Vapor flux

Flow meter

(1) Do not enter flux into the refrigeration cycle.

Stop valve

(2) When chlorine contained in the flux remains

within the pipe, the lubricating oil deterio-

rates. Therefore, use a flux which does not

contain chlorine.

Nitrogen gas

cylinder

From Nitrogen cylinder

(3) When adding water to the flux, use water

which does not contain chlorine (e.g. distilled

water or ion-exchange water).

Pipe

(4) Remove the flux after brazing.

Nitrogen

gas

Rubber plug

Fig. 3-5-1 Prevention of oxidation during brazing

– 19 –

4. CONSTRUCTION VIEWS

4-1. Indoor Unit

RAS-B10EKVP-E

RAS-B13EKVP-E

RAS-B16EKVP-E

RAS-M10EKCVP-E

RAS-M13EKCVP-E

RAS-M16EKCVP-E

Parts

WH-H03JE

name of (Heat pump

remote model)

control

WC-H03JE

(Cooling-only

model)

– 20 –

4-2. Outdoor Unit

RAS-M14EAV-E, RAS-M18EAV-E (Heat pump models)

RAS-M14EACV-E, RAS-M18EACV-E (Cooling-only models)

– 21 –

5. WIRING DIAGRAM

5-1. Indoor Unit

RAS-B10EKVP-E, RAS-B13EKVP-E, RAS-B16EKVP-E (Heat pump models)

RAS-M10EKCVP, RAS-M13EKCVP-E, RAS-M16EKCVP-E (Cooling-only models)

POWER SUPPLY

CIRCUIT

Air purifier

Electrode

High-voltage

Power supply

BRW

RED

Color

Identification

RED : RED

WHI : WHITE

BLK : BLACK

BLU : BLUE

BRW : BROWN

ORN : ORANGE

PUR : PURPUL

YEL : YELLOW

GRY : GRAY

Wireless Unit Assembly

PNK : PINK

GRN& GREEN&

YEL

YELLOW

– 22 –

5-2. Outdoor Unit

RAS-M14EAV-E, RAS-M18EAV-E (Heat pump models)

RAS-M14EACV-E, RAS-M18EACV-E (Cooling-only models)

– 23 –

6. SPECIFICATIONS OF ELECTRICAL PARTS

6-1. Indoor Unit

RAS-B16EKVP-E, RAS-B13EKVP-E, RAS-B10EKVP-E

RAS-M16EKCVP-E, RAS-M13EKCVP-E, RAS-M10EKCVP-E

No.

Parts name

Type

Specifications

DC280–340V, 30W

Fan motor (for indoor)

MF-280-30-5

Room temp. sensor

(TA-sensor)

( – )

10kΩ at 25°C

Heat exchanger temp. sensor

(TC-sensor)

( – )

10kΩ at 25°C

Louver motor

MP24GA

Output (Rated) 1W, 16poles, 1phase DC12V

– 24 –

6-2. Outdoor Unit

RAS-M14EAV-E, RAS-M14EACV-E, RAS-M18EAV-E, RAS-M18EACV-E

No.

Parts name

SC coil (Noise filter) (L03)

SC coil (Noise filter) (L01)

DC-DC transformer

Model name

ADR2520-R15TB or SC-20-01J-A

ADR25H-200R8TB

Rating

AC 250V, 20A, 0.15mH

AC 250V, 20A, 0.88mH

SWT-72 or SWT-83

Primary side DC 280VSecondary side:

7.5Vx1, 13Vx126.5Vx3, 16Vx1, 15Vx1

Outside fan motor

Relay (4-way valve)

Relay (Power relay)

ICF-140-43-4

DC 140V, 43W

G5N-1A

Coil:DC 12V, Contact: 2A, AC250V

Coil:DC 12V, Contact:20A, AC250V

64kΩ (20°C)

DI12D1-O or G4A-1A-PE

Discharge temp. sensor (TD-sensor) (Inverter attached)

Outside air temp. sensor

(TO-sensor)

(Inverter attached)

10kΩ (25°C)

TGa-sensor (Heat pump models)

TGb-sensor (Heat pump models)

(Inverter attached)

64kΩ (25°C)

10kΩ (25°C)

10 TGa-sensor (Cooling-only models) (Inverter attached)

11 TGb-sensor (Cooling-only models) (Inverter attached)

Evaporator temp. sensor

(TE-sensor)

(Inverter attached)

13 Suction temp. sensor (TS-sensor)

14 Terminal block (9P)

10kΩ (25°C)

—

20A, AC 250V

Forprotectionofswitchingpowersource(F03) 3.15A, AC 250V

15 Fuse

For protection of inverter input overcurrent

For protection of power source

LLQ2G761KHU

25A, AC 25V

6.3A, AC 250V

16 Electrolytic capacitor

17 IGBT (Q200~Q205)

18 Compressor (M18)

19 Compressor (M14)

20 Compressor thermo.

21 Rectifier (DB01, DB02)

22 IGBT (Q404)

DC 400V, 760µF

600V, 20A

GT20J321

DA130A1F-25F

3 phases, 4 poles, 1,100W

3 phases, 4 poles, 750W

OFF: 125±4°C, ON: 90±5°C

Diode:600V, 25A

IGBT: 600V, 40A

L = 10mH, 16A

DA111A1F-20F1

US622KXTMQO

D25 X B60

GT40Q321 or GT30J121

CH-57

23 Reactor (Main)

24 Reactor (Sub)

CH-43-Z-K

L = 10mH, 1A

NOTE: *1 Heat pump models only.

– 25 –

7. REFRIGERANT CYCLE DIAGRAM

7-1. Refrigerant Cycle Diagram

RAS-B13EKVP-E, RAS-B10EKVP-E

RAS-M14EAV-E

Tca

T1 Temp. measurement

To B room

INDOOR UNIT

Indoor heat

exchanger

To B room

Per 1 unit

Max.: 20m

Total: 30m

Chargeless

= 20m

Indoor fan

Deoxidized copper pipe

Both A and B rooms

Outer dia. : 6.35mm

Thickness : 0.8mm

Pressure measurement

Charge

Gauge attaching port

Vacuum pump connecting port

= 20g/m

(21 to 30m)

Sectional shape

of heat insulator

Deoxidized copper pipe

Both A and B rooms

Outer dia. : 9.52mm

Thickness : 0.8mm

Capillary

Ø2.2 x 200

Muffler

TGa

TGb

Strainer

4-way valve

(STF-0108Z)

Pulse motor

valve at liquid side

(CAM-B22YGTF-2)

Muffler

Compressor

DA111A1F-20F1

Capillary

Ø2.2 x 200

Outdoor heat

exchanger

Temp. measurement

Refrigerant amount : 0.90kg

Propeller fan

OUTDOOR UNIT

Gas leak check position

Refrigerant flow (Cooling)

Refrigerant flow (Heating)

NOTE :

*1 The TC sensor is at the center of the indoor unit’s heat exchanger.

NOTE :

• The maximum pipe length of this air conditioner is 30m. When the pipe length exceeds 20m, the additional

charge of refrigerant, 20g per 1m for the part of pipe exceeded 20m is required (Max. 200g)

– 26 –

RAS-M13EKCVP-E, RAS-M10EKCVP-E

RAS- M14EACV-E

Tca

T1 Temp. measurement

To B room

INDOOR UNIT

Indoor heat

exchanger

To B room

Per 1 unit

Max.: 20m

Total: 30m

Chargeless

= 20m

Indoor fan

Deoxidized copper pipe

Both A and B rooms

Outer dia. : 6.35mm

Thickness : 0.8mm

Pressure measurement

Charge

Gauge attaching port

Vacuum pump connecting port

= 20g/m

(21 to 30m)

Sectional shape

of heat insulator

Deoxidized copper pipe

Both A and B rooms

Outer dia. : 9.52mm

Thickness : 0.8mm

Capillary

Ø2.2 x 200

TGb

TGa

Strainer

Pulse motor

valve at liquid side

(CAM-B22YGTF-2)

Muffler

Compressor

DA111A1F-20F1

Capillary

Ø2.2 x 200

Outdoor heat

exchanger

Temp. measurement

Refrigerant amount : 0.90kg

Propeller fan

OUTDOOR UNIT

Gas leak check position

Refrigerant flow

NOTE :

*1 The TC sensor is at the center of the indoor unit’s heat exchanger.

NOTE :

• The maximum pipe length of this air conditioner is 30m. When the pipe length exceeds 20m, the additional

charge of refrigerant, 20g per 1m for the part of pipe exceeded 20m is required (Max. 200g)

– 27 –

RAS-B16EKVP-E, RAS-B13EKVP-E, RAS-B10KVP-E

RAS-M18EAV-E

Tca

T1 Temp. measurement

To B room

INDOOR UNIT

Indoor heat

exchanger

To B room

Per 1 unit

Max.: 20m

Total: 30m

Chargeless

= 20m

Indoor fan

Deoxidized copper pipe

Both A and B rooms

Outer dia. : 6.35mm

Thickness : 0.8mm

Pressure measurement

Charge

Gauge attaching port

Vacuum pump connecting port

= 20g/m

(21 to 30m)

Deoxidized copper pipe

Both A and B rooms

Outer dia. : 9.52mm (10,13)

: 12.7mm (16)

Sectional shape

of heat insulator

Thickness : 0.8mm

Capillary

Ø2.2 x 200

Muffler

TGa

TGb

Strainer

4-way valve

(STF-0108Z)

Pulse motor

valve at liquid side

(CAM-B22YGTF-2)

Muffler

Compressor

DA130A1F-25F

Capillary

Ø2.2 x 200

Outdoor heat

exchanger

Temp. measurement

Refrigerant amount : 1.20kg

Propeller fan

OUTDOOR UNIT

Gas leak check position

Refrigerant flow (Cooling)

Refrigerant flow (Heating)

NOTE :

*1 The TC sensor is at the center of the indoor unit’s heat exchanger.

NOTE :

• The maximum pipe length of this air conditioner is 30m. When the pipe length exceeds 20m, the additional

charge of refrigerant, 20g per 1m for the part of pipe exceeded 20m is required (Max. 200g)

– 28 –

RAS-M16EKCVP-E, RAS-M13EKCVP-E, RAS-M10EKCVP-E

RAS-M18EACV-E

Tca

T1 Temp. measurement

To B room

INDOOR UNIT

Indoor heat

To B room

exchanger

Per 1 unit

Max.: 20m

Total: 30m

Chargeless

= 20m

Indoor fan

Deoxidized copper pipe

Both A and B rooms

Outer dia. : 6.35mm

Thickness : 0.8mm

Pressure measurement

Charge

Gauge attaching port

Vacuum pump connecting port

= 20g/m

(21 to 30m)

Deoxidized copper pipe

Both A and B rooms

Outer dia. : 9.52mm (10,13)

: 12.7mm (16)

Sectional shape

of heat insulator

Thickness : 0.8mm

Capillary

Ø2.2 x 200

TGb

TGa

Strainer

Pulse motor

valve at liquid side

(CAM-B22YGTF-2)

Muffler

Compressor

DA130A1F-25F

Capillary

Ø2.2 x 200

Outdoor heat

exchanger

Temp. measurement

Refrigerant amount : 1.20kg

Propeller fan

OUTDOOR UNIT

Gas leak check position

Refrigerant flow

NOTE :

*1 The TC sensor is at the center of the indoor unit’s heat exchanger.

NOTE :

• The maximum pipe length of this air conditioner is 30m. When the pipe length exceeds 20m, the additional

charge of refrigerant, 20g per 1m for the part of pipe exceeded 20m is required (Max. 200g)

– 29 –

7-2. Operation Data

<Cooling> RAS-M14EAV-E, RAS-M14EACV-E

Temperature

condition

No.of

operating

units

Operating combination

(Unit)

Heat exchanger

pipe temp.

Standard

pressure P

(Mpa)

In-

door

fan

Out-

door

fan

compressor

revolution

(rps)

indoor

outdoor

T1 (

T2 (

43 to 45

47 to 49

0.7 to 0.9

0.9 to 1.1

11 to 13

8 to 11

High

700rpm

750rpm

1 unit

27 / 19

35 / –

14 to 16

2 units

<Heating> RAS-M14EAV-E

Temperature

condition

No.of

operating

units

Operating combination

(Unit)

Heat exchanger

pipe temp.

Standard

pressure P

(Mpa)

In-

door

fan

Out-

door

fan

compressor

revolution

(rps)

indoor

outdoor

T1 (

T2 (

0 to 2

2.2 to 2.4

2.5 to 2.7

1.9 to 2.1

36 to 38

41 to 43

30 to 32

High

750rpm

1 unit

-1 to 1

20/–

7/6

2 units

<Cooling> RAS-M18EAV-E, RAS-M18EACV-E

Temperature

condition

No.of

operating

units

Operating combination

(Unit)

Heat exchanger

pipe temp.

Standard

pressure P

(Mpa)

In-

door

fan

Out-

door

fan

compressor

revolution

(rps)

indoor

outdoor

T1 (

T2 (

41 to 43

45 to 47

47 to 49

48 to 50

0.9 to 1.1

0.8 to 1.0

0.9 to 1.1

11 to 13

8 to 10

High

700rpm

750rpm

1 unit

7 to 9

11 to 13

27/19

35/–

2 units

<Heating> RAS-M18EAV-E

Temperature

condition

No.of

operating

units

Operating combination

(Unit)

Heat exchanger

pipe temp.

Standard

pressure P

(Mpa)

In-

door

fan

Out-

door

fan

compressor

revolution

(rps)

indoor

outdoor

T1 (

T2 (

0 to 2

3.2 to 3.4

3.4 to 3.6

2.6 to 2.8

44 to 46

50 to 53

51 to 53

37 to 39

38 to 40

High

750rpm

1 unit

0 to 2

-1 to 1

20/–

7/6

2 units

101

NOTES :

(1) Measure surface temperature of heat exchanger pipe around center of heat exchanger path U bent.

(Thermistor thermometer)

(2) Connecting piping condition : 7.5meters 2 units

– 30 –

8. CONTROL BLOCK DIAGRAM

8-1. Indoor Unit

RAS-B10EKVP-E, RAS-B13EKVP-E, RAS-B16EKVP-E

Indoor Unit Control Unit

M.C.U

Louver

Motor

Functions

Heat Exchanger Sensor(Tc)

• Cold draft preventing Function

Room Temperature Sensor(Ta)

Louver Motor

• 3-minute Delay at Restart for Compressor

Drive Control

Infrared Rays Signal Receiver

• Fan Motor Starting Control

and Indication

Indoor Fan

Motor Control

• Processing

(Temperature Processing)

Initializing Circuit

Indoor

Fan Motor

• Timer

Clock Frequency

Oscillator Circuit

• Serial Signal Communication

• Clean Function

Air purifier

unit

Power Supply

Circuit

Converter

(D.C circuit)

Micro Switch

Noise Filter

Serial Signal Transmitter/Receiver

From Outdoor Unit

220-240V ~50Hz

220V ~60Hz

Serial Signal Communication

(Operation Command and Information)

Infrared Rays, 36.7kHz

Remote Controller

REMOTE CONTROLLER

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, HEAT

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECO

Hi-POWER

Air Purifier

SLEEP

– 31 –

RAS-M10EKCVP-E, RAS-M13EKCVP-E, RAS-M16EKCVP-E

Indoor Unit Control Unit

M.C.U

Louver

Motor

Functions

Heat Exchanger Sensor(Tc)

• 3-minute Delay at Restart for Compressor

Room Temperature Sensor(Ta)

Louver Motor

Drive Control

• Fan Motor Starting Control

Infrared Rays Signal Receiver

and Indication

• Processing

(Temperature Processing)

Indoor Fan

Motor Control

• Timer

Initializing Circuit

Indoor

Fan Motor

• Serial Signal Communication

• Clean Function

Clock Frequency

Oscillator Circuit

Air purifier

unit

Power Supply

Circuit

Converter

(D.C circuit)

Micro Switch

Noise Filter

Serial Signal Transmitter/Receiver

Serial Signal Communication

From Outdoor Unit

220-240V ~50Hz

220V ~60Hz

(Operation Command and Information)

Infrared Rays, 36.7kHz

Remote Controller

REMOTE CONTROLLER

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECO

Hi-POWER

Air Purifier

SLEEP

– 32 –

CONTROL BLOK DIAGRAM (Outdoor unit)

220–240 V ~50Hz

220 V ~60Hz

MCC-5015 (SUB P.C.B)

MCC-5009 (SUB P.C.B)

Current

detect

Unit A

send/receive

circuit

Unit B

send/receive

circuit

M.C.U

• PWM synthesis function

• Input current release control

• IGBT over-current detect control

• Outdoor fan control

Current

detect

Gas side pipe

temp. sensor

(unit A) (TGa)

Gate drive

circuit

•

High power factor correction control

Gas side pipe

temp. sensor

(unit B) (TGb)

• Signal communication to MCU

M.C.U

Outdoor Heat-

exchanger temp.

sensor (TE)

•

Inverter output frequency control

• A/D converter function

• P.M.V. control

Discharge temp.

sensor (TD)

High power factor

correction circuit

Gate drive

circuit

• Discharge temp. control

• Error displey

Suction temp.

sensor (TS)

•

Signal communication to MCU

Outdoor air temp.

sensor (TO)

Noise

filter

Input current

sensor

Converter

(AC → DC)

Inverter

(DC → AC)

Outdoor

fan motor

Driver circuit of P.M.V.

Relay

RY701

Inverter

(DC → AC)

Compressor

A unit

P.M.V.

B unit

P.M.V.

P.M.V : Pulse Motor Valve

PWM : Pules Width Modulation

IGBT : Insulated Gate Bipolar Transistor

*1 : Heat Pump Model Only

4-way

valve

9. OPERATION DESCRIPTION

• Detection of inverter input current and current

release operation

9-1. Outline of Air Conditioner Control

This air conditioner is a capacity-variable type air

conditioner, which uses DC motor for the indoor fan

motor and the outdoor fan motor. And the capacity-

proportional control compressor which can change

the motor speed in the range from 9 to 120 rps is

mounted. The DC motor drive circuit is mounted to

the indoor unit. The compressor and the inverter to

control fan motor are mounted to the outdoor unit.

The entire air conditioner is mainly controlled by the

indoor unit controller.

• Over-current detection and prevention operation

to IGBT module (Compressor stop function)

• Compressor and outdoor fan stop function

when serial signal is off (when the serial signal

does not reach the board assembly of outdoor

control by trouble of the signal system)

• Transferring of operation information (Serial

signal) from outdoor unit controller to indoor

unit controller

The indoor unit controller drives the indoor fan motor

based upon command sent from the remote control-

ler, and transfers the operation command to the

outdoor unit controller.

The outdoor unit controller receives operation

command from the indoor unit side, and controls the

outdoor fan and the pulse motor valve. (P.M.V)

Besides, detecting revolution position of the com-

pressor motor, the outdoor unit controller controls

speed of the compressor motor by controlling output

voltage of the inverter and switching timing of the

supply power (current transfer timing) so that motors

drive according to the operation command.

• Detection of outdoor temperature and opera-

tion revolution control

• Defrost control in heating operation (Temp.

measurement by outdoor heat exchanger and

control for four-way valve and outdoor fan)

(3) Contents of operation command signal (Serial

signal) from indoor unit controller to outdoor unit

controller

The following three types of signals are sent

from the indoor unit controller.

• Operation mode set on the remote control

• Compressor revolution command signal defined

by indoor temperature and set temperature

(Correction along with variation of room

temperature and correction of indoor heat

exchanger temperature are added.)

And then, the outdoor unit controller transfers

reversely the operating status information of the

outdoor unit to control the indoor unit controller.

As the compressor adopts four-pole

brushless DC motor, the frequency of the

supply power from inverter to compressor is

two-times cycles of the actual number of

revolution.

• Temperature of indoor heat exchanger

• For these signals ([Operation mode] and

[Compressor revolution] indoor heat exchanger

temperature), the outdoor unit controller

monitors the input current to the inverter, and

performs the followed operation within the

range that current does not exceed the allow-

able value.

(1) Role of indoor unit controller

The indoor unit controller judges the operation

commands from the remote controller and

assumes the following functions.

• Judgment of suction air temperature of the

indoor heat exchanger by using the indoor

temp. sensor. (TA sensor)

• Judgment of the indoor heat exchanger

temperature by using heat exchanger sensor

(TC sensor) (Prevent-freezing control, etc.)

• Louver motor control

• Indoor fan motor operation control

• LED (Light Emitting Diode) display control

• Transferring of operation command signal

(Serial signal) to the outdoor unit

• Reception of information of operation status

(Serial signal including outside temp. data) to

the outdoor unit and judgment/display of error

• Air purifier operation control

(4) Contents of operation command signal (Serial

signal) from outdoor unit controller to indoor unit

controller

The following signals are sent from the outdoor

unit controller.

• The current operation mode

• The current compressor revolution

• Outdoor temperature

• Existence of protective circuit operation

For transferring of these signals, the indoor

unit controller monitors the contents of signals,

and judges existence of trouble occurrence.

Contents of judgment are described below.

• Whether distinction of the current operation

status meets to the operation command signal

(2) Role of outdoor unit controller

• Whether protective circuit operates

Receiving the operation command signal (Serial

signal) from the indoor unit controller, the out-

door unit performs its role.

When no signal is received from the outdoor

unit controller, it is assumed as a trouble.

• Compressor operation control

• Operation control of outdoor

fan motor

• P.M.V. control

• 4-way valve control

 _{Operations followed to}

 ^{from indoor side.}

judgment of serial signal



– 34 –

9-2. Operation Description

No.

Contents

Page

9-2

1 Basic operation...................................................................................36

1) Operation control ................................................................................................ 36

2) Operating mode selection................................................................................... 37

3) Cooling/Heating operation .................................................................................. 37

4) AUTO operation .................................................................................................. 38

5) DRY operation .................................................................................................... 38

2 Indoor fan motor control .....................................................................39

<In cooling operation> ............................................................................................. 39

<In heating operation>............................................................................................. 40

3 Outdoor fan motor control ..................................................................41

4 Capacity control..................................................................................43

5 Current release control.......................................................................43

6 Release protective control ..................................................................44

<In cooling/dry operation> ....................................................................................... 44

<In heating operation>............................................................................................. 44

7 Winding/Coil heating control...............................................................45

8 Defrost control (Only in heating operation).........................................45

9 Louver control.....................................................................................46

1) Louver position ................................................................................................... 46

2) Air direction adjustment ...................................................................................... 46

3) Swing .................................................................................................................. 46

10 ECO operation....................................................................................47

11 Temporary operation ..........................................................................48

12 Air purifying control.............................................................................49

Air purifying control [Detection of abnormality]...................................50

13 Discharge temperature control ...........................................................50

14 Pulse Motor valve (PMV) control ........................................................51

15 Clean operation ..................................................................................52

16 Clean operation release ....................................................................53

17 Select switch on remote controller .....................................................54

Auto Restart Function ..............................................................................55

1 How to Set the Auto Restart Function ................................................55

2 How to Cancel the Auto Restart Function ..........................................56

3 Power Failure During Timer Operation ...............................................56

FILTER Indicator ......................................................................................56

1 How to Turn Off FILTER Indicator.......................................................56

Remote Controller and Its Fuctions..........................................................57

1 Parts Name of Remote Controller ......................................................57

2 Name and Functions of Indications on Remote Controller.................58

Hi-POWER Mode .....................................................................................59

9-3

9-4

9-5

9-6

– 35 –

Item

Operation flow and applicable data, etc.

1) Operation control

Description

1. Basic

1) The operation conditions are

selected by the remote controller as

shown in the left.

operation

Receiving the user’s operation condition setup, the opera-

tion statuses of indoor/outdoor units are controlled.

2) A signal is sent by ON button of the

remote controller.

Remote controller

3) The signal is received by a sensor of

the indoor unit and processed by

the indoor controllers as shown in

the left.

Selection

of operation

conditions

Control contents of remote controller

• ON/OFF (Air conditioner/Air purifier)

• Operation select

(COOL/HEAT/AUTO/DRY)

• Temperature setup

• Air direction

• Swing

• Air volume select

4) The indoor controller controls the

indoor fan motor and louver motor.

ON/OFF

5) The indoor controller sends the

operation command to the outdoor

controller, and sends/receives the

control status with a serial signal.

(AUTO/LOW/LOW+/MED/MED+/HIGH)

• ECO

• ON timer setup

• OFF timer setup

• High power

6) The outdoor controller controls the

operation as shown in the left, and

also controls the compressor,

outdoor fan motor, 4-way valve and

pulse motor valve.

Indoor unit

Signal

receiving

Indoor unit control

• Command signal generating

function of indoor unit operation

• Calculation function

(temperature calculation)

• Activation compensation

function of indoor fan

• Cold draft preventive function

• Timer function

Indoor unit

control

• Indoor fan motor

• Louver motor

Operation

command

• Indoor heat exchanger

release control

• Clean function

Serial signal

send/receive

Outdoor unit

Serial signal

send/receive

Outdoor unit control

• Compressor

Inverter

• Frequency control of inverter output

• Waveform composite function

• Calculation function

• Outdoor fan motor

• 4-way valve

• Pulse motor valve (PMV)

Outdoor unit

control

(Temperature calculation)

• AD conversion function

• Quick heating function

• Delay function of compressor reactivation

• Current release function

• GTr over-current preventive function

• Defrost operation function

– 36 –

Item

Operation flow and applicable data, etc.

Description

1. Basic

2) Operating mode selection when performing 2-room

operation

1) The outdoor unit operating mode

conforms to the instructions of the

indoor unit that was pressed first.

operation

Actual indoor unit Actual outdoor

Indoor unit

Set operating mode

No.

2) When combined operation consist-

ing of cooling (dry) and heating, fan

(air purification) and heating, or

cleaning operation and heating is

performed, operation conforms to

the instructions of the indoor unit

that was pressed first as shown in

the left table.

operation

Cooling (dry)

Heating

unit operation

Indoor unit pressed

Cooling (dry)

Heating

Cooling

Indoor unit pressed last

Indoor unit pressed

Heating

Stopped

Indoor unit pressed last

Heating

Fan (solo air

purification)

Fan (solo air

purification)

Indoor unit pressed

Indoor unit pressed last

Indoor unit pressed

Fan (solo air

purification)

Fan (solo air

purification)

3) The indoor fan stops for the indoor

unit that was pressed last and which

instructions are ignored.

Fan (solo air

purification)

Fan (solo air

purification)

Cooling

Indoor unit pressed last

Indoor unit pressed

Cooling (dry)

Fan (solo air

purification)

Fan (solo air

purification)

Indoor unit pressed last

Indoor unit pressed

Cooling (dry)

Heating

Cooling (dry)

Fan stopped

Heating

Cooling

Heating

Indoor unit pressed last

Indoor unit pressed

Heating

Indoor unit pressed last

Cooling (dry)

Fan stopped

Fan (solo air

purification)

Fan (solo air

purification)

Indoor unit pressed

Stopped

Heating

Indoor unit pressed last

Indoor unit pressed

Heating

Fan stopped

Heating

Fan (solo air

purification)

Indoor unit pressed last

Fan stopped

Indoor unit pressed

Cleaning operation Cleaning operation

Stopped

Cooling

Indoor unit pressed last Cleaning operation Cleaning operation

Indoor unit pressed

Indoor unit pressed last

Indoor unit pressed

Cleaning operation Cleaning operation

Cooling (dry)

Indoor unit pressed last Cleaning operation Cleaning operation

Indoor unit pressed

Cleaning operation Cleaning operation

Stopped

Fan (solo air

purification)

Fan (solo air

purification)

Indoor unit pressed last

Fan (solo air

purification)

Fan (solo air

purification)

Indoor unit pressed

Indoor unit pressed last Cleaning operation

Cleaning operation

Indoor unit pressed

Indoor unit pressed last

Indoor unit pressed

Cleaning operation Cleaning operation

Stopped

Heating

Fan stopped

Heating

Indoor unit pressed last Cleaning operation

Fan stopped

3) Cooling/Heating operation

1) Receiving the operation ON signal

of the remote controller, the cooling

or heating operation signal starts

being transferred form the indoor

controller to the outdoor unit.

The operations are performed in the following parts by

controls according to cooling/heating conditions.

Operation ON

Setup of remote controller

2) At the indoor unit side, the indoor

fan is operated according to the

contents of “2. Indoor fan motor

control” and the louver according to

the contents of “9. Louver control”,

respectively.

Indoor unit

control

Indoor fan motor control

Louver control

Sending of

operation

command signal

3) The outdoor unit controls the

outdoor fan motor, compressor,

pulse motor valve and 4-way valve

according to the operation signal

sent from the indoor unit.

Compressor revolution control

Outdoor fan motor control

4-way valve control

Outdoor unit

control

*1. The power coupler of

In cooling operation: OFF

[

]

4-way valve is usually turned on,

and it is turned off during defrost

operation. (Only in heating)

In heating operation: ON

Pulse motor valve control

– 37 –

Item

1. Basic operation 4) AUTO operation

Selection of operation mode

Operation flow and applicable data, etc.

Description

1) Detects the room temperature

(Ta) when the operation started.

2) Selects an operation mode from

Ta in the left figure.

As shown in the following figure, the operation starts by

selecting automatically the status of room temperature

(Ta) when starting AUTO operation.

3) Fan operation continues until an

operation mode is selected.

4) When AUTO operation has

started within 2 hours after

heating operation stopped and if

the room temperature is 20°C or

more, the fan operation is

performed with ”Super Ultra

LOW” mode for 3 minutes.

Then, select an operation mode.

Cooling operation

5) If the status of compressor-OFF

continues for 15 minutes the

room temperature after selecting

an operation mode (COOL/

HEAT), reselect an operation

mode.

Ts + 1

Monitoring (Fan)

Ts – 1

Heating operation (Heat pump model)

Fan only operation (Cooling-only model)

*1. When reselecting the operation mode, the fan speed

is controlled by the previous operation mode.

5) DRY operation

1) Detects the room temperature

(Ta) when the DRY operation

started.

DRY operation is performed according to the difference

between room temperature and the setup temperature

as shown below.

2) Starts operation under condi-

tions in the left figure according

to the temperature difference

between the room temperature

and the setup temperature (Tsc).

Setup temperature (Tsc) =

In DRY operation, fan speed is controlled in order to

prevent lowering of the room temperature and to avoid

air flow from blowing directly to persons.

Set temperature on remote

controller (Ts) + (0.0 to 1.0)

[

]

˚C

3) When the room temperature is

lower 1°C or less than the setup

temperature, turn off the

compressor.

L– (W5)

(W5+W3) / 2

1.0

0.5

SL (W3)

Tsc

Fan speed

– 38 –

Item

Operation flow and applicable data, etc.

Description

* Symbols

2. Indoor fan

motor control

(This operation controls the fan speed at indoor unit side.)

M+

: Ultra High

: High

: Medium+

: Medium

: Low+

The indoor fan (cross flow fan) is operated by the phase-

control induction motor. The fan rotates in 5 stages in

MANUAL mode, and in 5 stages in AUTO mode, respec-

tively. (Table 1)

L+

L-

: Low

: Low–

: Ultra Low

SUL : Super Ultra Low

COOL ON

* The fan speed broadly varies due

to position of the louver, etc.

The described value indicates one

under condition of inclining

downward blowing.

Fan speed setup

AUTO

MANUAL

(Fig. 1)

Indication

Fan speed

1) When setting the fan speed to L,

L+, M, M+ or H on the remote

controller, the operation is

performed with the constant

speed shown in Fig. 1.

L+

(L + M) / 2

M+

(M + H) / 2

2) When setting the fan speed to

AUTO on the remote controller,

revolution of the fan motor is

controlled to the fan speed level

shown in Fig. 2 and Table 1

(Fig. 2)

according to the setup tempera-

ture, room temperature, and

heat exchanger temperature.

Air volume AUTO

˚C

[

]

M+(WB)

+2.5

+2.0

*3 : Fan speed =

(M + –L) x 3/4 + L

*4 : Fan speed =

(M + –L) x 2/4 + L

+1.5

+1.0

*5 : Fan speed =

(M + –L) x 1/4 + L

+0.5

Tsc

(Linear approximation

from M+ and L)

L(W6)

(Table 1) Indoor fan air flow rate

RAS-B10EKVP-E,

RAS-B13EKVP-E,

RAS-M13EKCVP-E

RAS-B16EKVP-E,

RAS-M16EKCVP-E

COOL

FAN

ONLY

RAS-M10EKCVP-E

– 39 –

Item

Operation flow and applicable data, etc.

<In heating operation> (Heat pump model)

Description

2. Indoor fan

motor control

1) When setting the fan speed to

L, L+, M, M+ or H on the remote

controller, the operation is

HEAT ON

performed with the constant

speed shown in Fig. 3 and Table 1.

2) When setting the fan speed to

AUTO on the remote controller,

revolution of the fan motor is

controlled to the fan speed level

shown in Fig. 5 according to the

set temperature and room

temperature.

Fan speed setup

MANUAL

(Fig. 3)

Indication

Fan speed

3) Min air flow rate is controlled by

temperature of the indoor heat

exchanger (Tc) as shown in Fig. 4.

L+

(L + M) / 2

AUTO

M+

(M + H) / 2

4) Cold draft prevention, the fan

speed is controlled by tempera-

ture of the indoor heat ex-

changer (Tc) as shown in

Fig. 6.

YES

TC ≥ 42˚C

Min air flow rate control

Limited to Min WD tap

No limit

*Fan speed =

(TC – (42 + a)) / 10 x (WD – W8) + W8

a : In up operation 1, in down operation 0

(Fig. 4)

Basic fan control

Cold draft preventive control

Fan speed

AUTO

[

]

TA ˚C

TSC

L (W8)

H (WE)

–0.5

–1.0

–1.5

–2.0

–2.5

–5.0

–5.5

Line-approximate

H and SUL with Tc.

*A+4

*A-4

*A+4

*A-4

*A+4

*A-4

SUL (W2)

Stop

M+ (WD)

H (WE)

Fan speed Fan speed Fan speed

AUTO MANUAL

in starting in stability in starting

AUTO

*1: Fan speed = (M + –L) x 1 ÷ 4 + L

* No limitation while fan speed MANUAL mode is in stability.

* A: When Tsc ≥ 24, A is 24, and when Tsc < 24, A is Tsc

Tsc: Set value

*2: Fan speed = (M + –L) x 2

*3: Fan speed = (M + –L) x 3

4 + L

(Calculated with linear approximation from M+ and L)

(Fig. 5)

(Fig. 6)

[In starting and in stability]

In starting

In stability

FAN AUTO • Until 12 minutes passed after operation start

• When 12 to 25 minutes passed after operation start and

room temp. is higher than (set temp. –3°C)

• When 25 minutes or more passed after operation start

• When 12 to 25 minutes passed after operation start

and room temp. is 3°C or lower than set temp.

FAN Manual • Room temp. < Set temp. –4°C

• Room temp. ≥ Set temp. –3.5°C

– 40 –

Item

Operation flow and applicable data, etc.

Description

3. Outdoor fan

motor control

The blowing air volume at the outdoor unit side is con-

trolled.

1) The operation command sent

from the remote controller is

processed by the indoor unit

controller and transferred to the

controller of the outdoor unit.

Receiving the operation command from the controller of

indoor unit, the controller of outdoor unit controls fan speed.

* For the fan motor, a DC motor with non-stage variable

speed system is used. However, it is limited to 8 stages

for reasons of controlling.

2) When strong wind blows at

outdoor side, the operation of air

conditioner continues with the

fan motor stopped.

Air conditioner ON

(Remote controller)

3) Whether the fan is locked or not

is detected, and the operation of

air conditioner stops and an

alarm is displayed if the fan is

locked.

Indoor unit controller

4) According to each operation

mode, by the conditions of

outdoor temperature(To) and

compressor revolution, the

speed of the outdoor fan shown

in the table is selected.

1) Outdoor unit

operation command

(Outdoor fan control)

YES

OFF status of

2) Fan speed ≥ 400

when the motor stopped.

fan motor continues.

Fan motor ON

Air conditioner

OFF

Alarm

display

3) Fan lock

4) Motor operates as shown in the table below.

Cooling operation, dry operation

RAS-M18EAV-E, RAS-M18EACV-E

Compressor revolution(rps)

~20

450

350

300

450

~30

700

650

550

450

350

650

550

650

~46

750

700

650

550

450

350

700

650

700

46~

850

750

700

550

450

750

700

750

To>38 C

28<To≤38

15<To≤28

10<To≤15

5.5<To≤10

0<To≤5.5

Normal

operation

To>38 C

econo

operation

To≤38 C

To is abnormal

To:outdoor sensor temp. ( C)

(rpm)

RAS-M14EAV-E, RAS-M14EACV-E

Compressor revolution(rps)

~20

450

350

300

450

~30

700

650

550

450

350

650

550

650

~60

750

700

650

550

450

350

700

650

700

60~

850

750

700

650

550

450

750

700

750

To>38 C

28<To≤38

15<To≤28

10<To≤15

5.5<To≤10

0<To≤5.5

Normal

operation

To>38 C

econo

operation

To≤38 C

To is abnormal

–

To:outdoor sensor temp. ( C)

(rpm)

– 41 –

Item

Operation flow and applicable data, etc.

Heating operation

Description

1) Operation is performed at the

MAX revolutions shown in the

left tables for 3 minutes after

compressor operation starts and

for 1 minute after defrosting

operation ends.

Zone A: The fan revolutions are

decreased by 100 rpm

every 20 seconds (to the

MIN revolutions).

Zone A:

When Zone A operation

continues for 5 minutes,

the compressor is stopped

and then restarted.

2) Following 1) above, operation is

performed at the outdoor unit fan

revolutions shown in the left

tables according to the outdoor

heatexchanger sensor (TE

sensor) temperature.

24°C

21°C

Zone B: The fan revolutions are

decreased by 100 rpm

every 20 seconds (to the

MIN revolutions).

Zone B:

Zone C:

Zone C: The fan revolutions are

decreased by 50 rpm

every 20 seconds (to the

MIN revolutions).

18°C

15°C

Zone D: The fan revolutions are

maintained at the current

revolutions.

Zone D:

Zone E:

Zone E: The fan revolutions are

increased by 50 rpm

every 20 seconds (to the

MAX revolutions).

RAS-M18EAV-E

Compressor revolution(rps)

Fan revolution

~20

~48

48~

MIN

250

MAX

400

600

400

600

400

MIN

250

MAX

600

700

750

500

600

700

MIN

250

MAX

700

750

800

600

700

750

To>10 C

Normal

operation

5.5<To≤10

-5<To≤5.5

To≤-5

To>10 C

5.5<To≤10

-5<To≤5.5

To≤-5

econo

operation

To is abnormal

–

To:outdoor sensor temp. ( C)

RAS-M14EAV-E

Compressor revolution(rps)

Fan revolution

~20

~60

60~

MIN

250

MAX

400

600

400

600

400

MIN

250

MAX

600

700

750

500

600

700

MIN

250

MAX

700

750

800

600

700

750

To>10 C

Normal

operation

5.5<To≤10

-5<To≤5.5

To≤-5

To>10 C

5.5<To≤10

-5<To≤5.5

To≤-5

econo

operation

To is abnormal

–

To:outdoor sensor temp. ( C)

– 42 –

Item

Operation flow and applicable data, etc.

Description

4. Capacity

control

1) Indoor unit A and Indoor unit B

determine the respective

Outdoor unit

instruction revolutions from the

difference between the remote

controller setting temperature

(Ts) and the indoor temperature

(Ta), and transmit this to the

outdoor unit.

Indoor Unit A

Inverter

Compressor

Operation

mode

No.of

operating unit

Combination of

indoor units

Compressor

revolution (rps)

2) The outdoor unit receives the

instructions from the indoor

units, and the inverter operates

the compressor at the calculated

revolutions.

Outdoor unit

–

13 to 45

13 to 71

13 to 79

15 to 83

13 to 76

13 to 99

13 to 102

15 to 120

13 to 56

13 to 74

18 to 74

18 to 75

13 to 75

13 to 80

16 to 84

16 to 85

1 unit

M18EAV-E

M18EACV-E

Cooling

2 units

1 unit

3) The compressor operation range

in each operating mode is shown

in the left table.

–

M18EAV-E

Heating

2 units

1 unit

M14EAV-E

M14EACV-E

–

Cooling

Heating

2 units

1 unit

M14EAV-E

2 units

5. Current release This function prevents troubles on the electronic parts of

1) The input current of the outdoor

unit is detected in the inverter

section of the outdoor unit.

control

the compressor driving inverter.

This function also controls drive circuit of the compressor

speed so that electric power of the compressor drive circuit 2) According to the detected

does not exceed the specified value.

outdoor temperature, the

specified value of the current is

selected.

Outdoor unit inverter main

circuit control current

Outdoor temp. To

3) Whether the current value

exceeds the specified value or

not is judged.

Setup of current release point

4) If the current value exceeds the

specified value, this function

reduces the compressor speed

and controls speed up to the

closest one commanded from

the indoor unit within the range

which does not exceed the

specified value.

High

Operating current ≤

Reduce compressor speed

Current decrease

Setup value

Low

Capacity control continues.

Cooling current Heating current

Outdoor temp.

release value

7.5A

40˚C

16˚C

11˚C

39˚C

10.1A

10.3A

10.5A

15.5˚C

10.5˚C

12.0A

– 43 –

Item

Operation flow and applicable data, etc.

Description

6. Release

protective

1) When temperature of the indoor

heat exchanger drops below

5°C, the compressor speed is

reduced. (P zone)

(Prevent-freezing control for indoor heat exchanger)

control by

In cooling/dry operation, the sensor of indoor heat ex-

changer detects evaporation temperature and controls the

compressor speed so that temperature of the heat ex-

changer does not exceed the specified value.

temperature of

indoor heat

exchanger

2) When temperature of the indoor

heat exchanger rises in the

range from 6°C to under 7°C,

the compressor speed is kept.

(Q zone)

3) When temperature of the indoor

heat exchanger rises to 7°C or

higher, the capacity control

operation returns to the usual

control in cooling operation.

(R zone)

Usual cooling capacity control

When the value is

in Q zone, the

compressor speed

is kept.

7˚C

6˚C

5˚C

Reduction of compressor speed

<In heating operation> (Heat pump model)

(Prevent-overpressure control for refrigerating cycle)

1) When temperature of the indoor

heat exchanger rises in the

range from 50°C to 55°C, the

compressor speed is kept.

(Q zone)

In heating operation, the sensor of indoor heat exchanger

detects condensation temperature and controls the com-

pressor speed so that temperature of the heat exchanger

does not exceed the specified value.

When temperature of the indoor

heat exchanger drops in the

range from 46°C to under 55°C,

the compressor speed is kept.

(Q zone)

2) When temperature of the indoor

heat exchanger rises to 55°C or

higher, the compressor speed is

reduced. (P zone)

Reduction of compressor speed

3) When temperature of the indoor

heat exchanger does not rise to

50°C, or when it drops below to

46°C, the capacity control

operation returns to the usual

control in heating operation.

(R zone)

55˚C

When the value is

50˚C

in Q zone, the

compressor speed

is kept.

46˚C

Usual heating capacity control

– 44 –

Item

Operation flow and applicable data, etc.

Description

7. Winding/Coil

When the outdoor temperature is low, the windings/coils

Winding/Coil heating is performed

when the following conditions are

met.

heating control are heated to ensure compressor reliability.

Condition 1 :

When the discharge sensor tempera-

ture (Td) is less than 30°C.

Outdoor temperature To

Winding/Coil

heating amount

OFF

Condition 2 :

–1˚C

–3˚C

When 2 hours or more have elapsed

after cooling, dry or heating opera-

tion stops.

20W

Condition 3 :

When the outdoor sensor tempera-

ture (To) is as shown in the left

figure.

8. Defrost control (This function removes frost adhered to the outdoor heat

(Only in heating exchanger.)

The necessity of defrost operation is

detected by the outdoor heat

exchanger temperature. The condi-

tions to detect the necessity of

defrost operation differ in A, B, or C

zone each. (Table 1)

operation)

The temperature sensor of the outdoor heat exchanger

(Te sensor) judges the frosting status of the outdoor heat

exchanger and the defrost operation is performed with

4-way valve reverse defrost system.

• Defrost operation in A to C zones

1) Stop operation of the compressor

for 20 seconds.

2) Invert (ON) 4-way valve 10

seconds after stop of the com-

pressor.

3) The outdoor fan stops at the same

time when the compressor stops.

Start of heating operation

Operation time

(Minute)

0’ 10’ 15’

29’

34’

4) When temperature of the indoor

heat exchanger becomes 38°C or

lower, stop the indoor fan.

–4˚C

–6˚C

C zone

• Returning conditions from defrost

operation to heating operation

A zone

–25˚C

1) Temperature of outdoor heat

exchanger rises to +8°C or higher.

2) Temperature of outdoor heat

exchanger is kept at +5°C or

higher for 80 seconds.

B zone

The minimum value of Te sensor 10 to 15 minutes after

start of operation is stored in memory as Te0.

3) Defrost operation continues for

15 minutes.

Table 1

1) Stop operation of the compressor

for approx. 50 seconds.

2) Invert (OFF) 4-way valve approx.

40 seconds after stop of the

compressor.

When Te0 - TE ≥ 2.5 continued for 2 minutes in

A zone

A zone, defrost operation starts.

When the operation continued for 2 minutes in

B zone

B zone, defrost operation starts.

3) The outdoor fan starts rotating at

the same time when the compres-

sor starts.

When Te0 - TE ≥ 3 continued for 2 minutes in C

zone, defrost operation starts.

C zone

– 45 –

Item

Operation flow and applicable data, etc.

Description

9. Louver control This function controls the air direction of the indoor unit.

1) Louver

position

• The position is automatically controlled according to the operation

mode (COOL/HEAT).

• The set louver position is stored in memory by the microcomputer,

and the louver returns to the stored position when the next opera-

tion is performed. (Cooling/heating memory position)

The angle of the louver is indicated as the horizontal angle is 0°.

When the louver closes fully, it directs approx. 49° upward.

1) Louver position in cooling operation

Horizontal

Cooling/AUTO

(COOL)/DRY

operation

(0˚)

Louver

angle

Cooling

memory

position

Powerful

operation

Hi Power

Cooling operation/

AUTO (COOL)/Dry

YES

Room temp. (Ta) <

Room temp. (Ta) ≥

Set temp. (Tsc) + 3.5

YES

Room temp. ≥

Set temp. +3.5

Cooling

memory

position

Inclined

blowing

Initial setting of

“Inclined blowing”

“Cooling storage position” “Cooling storage position” Louver :

Louver :

Directs downward (9˚)

Louver :

Directs downward (9˚)

Directs downward (14˚)

YES

Room temp. ≥

Set temp. +3.5

2) Louver position in heating operation

ECO operation

Heating

operation

Room temp. (Ta) <

Set temp. (Tsc) – 3 or

25 minutes after start

of operation

Room temp. (Ta) ≥

Set temp. (Tsc) – 3

Heating operation/

AUTO (HEAT)

Heating

memory

position

ECO

operation

YES

Room temp. ≥

Set temp. –3.0

Heating

memory

position

Horizontal

position

Initial setting of

“Heating storage position” Louver :

“Heating storage position” “Cooling storage position”

Louver :

Directs downward (76˚)

Directs downward (9˚)

YES

Room temp. ≥

Set temp. –3.0

2) Air direction

adjustment

• The louver position can

be arbitrarily set up by

pushing [FIX] button.

Air direction

Horizontal

blowing

Inclined

blowing

Blowing

downward

Inclined

blowing

Horizontal

blowing

3) Swing

• Swing operation is performed in width 35° with the stop position as

the center.

• Swing

When pushing [SWING]

button during operation,

the louver starts swing-

ing.

• If the stop position exceeds either upper or lower limit position,

swing operation is performed in width 35° from the limit which the

stop position exceeded.

– 46 –

Item

Operation flow and applicable data, etc.

Description

10. ECO

When pushing [ECO] button on the remote controller, a quiet

and mild operation is performed by reducing the fan speed and

the compressor speed.

operation

This function operates the air conditioner with the difference

between the set and the room temperature as shown in the

following figure.

1) The room temperature (Tao) at

the start time of DRY operation

is detected.

The time correction is performed for 8 minutes each. (However, 2) According to difference between

the first correction is performed 150 seconds after start of the

operation.)

the room temperature and the

set temperature (Tsc), the

operation starts with the condi-

tions shown in the left figure.

Set temp.

(Tsc) = Set temp. on remote

controller (Ts) + (0.0 to 1.0)

Zone

Frequency

DRY max

Fan

L+ (W7)

Time correction

[˚C]

*12

*11

*10

+4.0

+3.5

+3.0

+2.5

+2.0

+1.5

+1.0

+0.5

TSC

–0.5

–1.0

3) If the room temperature is down

by 2°C or more, turn off the

compressor.

+ 1

L (W6)

COOL min

L– (W5)

± 0

UL (W4)

–1 zone: min 1

–2.0

OFF

* 12 (DRY max - COOL min) /6 x 5 + COOL min

* 11 (DRY max - COOL min) /6 x 4 + COOL min

* 10 (DRY max - COOL min) /6 x 3 + COOL min

* 9 (DRY max - COOL min) /6 x 2 + COOL min

* 8 (DRY max - COOL min) /6 x 1 + COOL min

1) The indoor fan speed is con-

trolled within W7 as maximum

value.

30 minutes

→ Time Compressor

speed

0Hz

2) Setting the compressor speed to

Max. αHz, the temperature zone

in which the operation can be

performed with Max. 16Hz is

gradually widened after 30

minutes passed when starting

ECO operation.

–0.5

–1.0

–1.5

–2.0

–2.5

–3.0

–4.0

–5.0

–6.0

–7.0

–8.0

–9.0

–10.0

–11.0

A zone

16Hz

3) The louver position is set

horizontally (Standard cooling

position) when the room tem-

perature comes close to the set

temperature or when 25 minutes

passed after starting ECO

operation.

B zone

16 to αHz

C zone

αHz

M14EAV-E M18EAV-E

60 Hz

50 Hz

– 47 –

Item

Operation flow and applicable data, etc.

Description

11. Temporary Pushing [RESET] button starts the temporary operation 1) When pushing [RESET] button, the

operation

of [AUTO] operation. When keeping [RESET] button

pushed for 10 seconds or more, the temporary [COOL]

operation is performed.

temporary [AUTO] operation starts.

2) When keeping [RESET] button pushed

for 3 seconds or more, Pi, Pi, Pi sound

is heard and [AUTO RESTART] control

is changed.

YES

FILTER indicator ON

Push RESET button.

3) When keeping [RESET] button pushed

for 10 seconds or more, “Pi” sound is

heard and the temporary [COOL]

operation starts.

Did you push

[RESET] button for

3 seconds or more?

Temporary

[AUTO] operation

4) If the FILTER indicator goes on, push

[RESET] button to go off the FILTER

indicator, and then push [RESET]

button again.

YES

Did you push

[RESET] button for

10 seconds or more?

YES

5) To stop the temporary operation, push

the button again.

Switch to

[AUTO RESTART] control.

Temporary

[COOL] Operation

– 48 –

Item

Operation flow and applicable data, etc.

Description

12. Air

This function generates nagative ion while cleaning the

air in the room.

Operation button

PURE button Air conditioner

purifying

control

Present

status

If air purifier-ON signal is received while the air condi-

tioner stops, the air purifier starts operation, and if it is

received while the air conditioner operates, the air

conditioner and the air purifier start operation.

The air ion generator operates linked with the air

purifying operation.

Stop

Air purifier only

Air purifier

Stop (All)

AC operation*

AC + Air purifier

All stop

Air conditioner AC + Air purifier

Joint use of AC

AC operation

All stop

and air purifier

Sending air purifier-ON

* When the previous operation was the

operation of air conditioner + air purifier,

an operation of air conditioner + air

purifier starts by pushing AC button on

the remote controller.

Air conditioner stops

Air conditioner operates

(Operation of air conditioner + air

purifier is stored in memory.)

OPERATION indicator ON

Start of air purifier-ON

Louver*1

Fan speed *2

Memory position

of louver/COOL

Air conditioner +

air purifier operate

Air purifying

operation

Cooling position AUTO, L, L+, M,

M+, H

Follows to

AC + Air purifying AC operation

operation

Follows to

AC operation

Fan ON

*1 Swing is available

Air purifier ON

*2 Fan speed is Fan Auto mode varies in

order, (M + 1) → (L) → (L–) → (SL).

Air purifying operation

Sending air purifier-OFF

Air purifier operates

Air conditioner +

Air purifier operate

OPERATION indicator OFF

Fan stop

Filter-OFF

Air conditioner operates

Air purifier-OFF

Louver close

All stop

– 49 –

Item

Operation flow and applicable data, etc.

Description

1. Purpose

12. Air

The air purifying control function is to alert

the user to trouble in the ionizing or air

purifying operation.

purifying

control

[Detection

of abnor-

mality]

Purifying operation

Total

YES

2. Description

operation time

1000H

Trouble is determined to have occurred

(indicated by the FILTER indicator) in the

following four cases.

FILTER indicator ON

1) When a count of 1000H has been

reached on the timer

Error input

YES

2) When the panel switch has been set to

OFF by the opening of the air inlet grile,

etc.

Purifier power OFF

FILTER incicator-OFF

continues.

Purifier power ON

1 minute or less

3) When an abnormal discharge caused

by a symptom such as the build-up of

dirt has been detected while the air

purifier is ON

YES

FILTER indicator ON

Purifier power OFF

4) When the electric dust collector has not

been installed correctly

Error detection

Approx.10 minutes

passed.

Purifier power OFF

* Trouble case (2) or (3) is deemed to

have occurred when the action

concerned continues for more than

one second.

YES

Purifier power ON

3. Operation

Error input

YES

The sequence that FILTER indicator is

turned on are described in the left flow-

chart.

! When 1000H timer counts up, the

FILTER indicator keeps lighting even if

the operation is stopped by the remote

controller.

1) Reset by RESET button.

The timer is stored in memory of the

microcomputer, and the operation time

is cleared by filter RESET button on the

indoor unit or a power failure. (FILTER

indicator goes off.)

2) Reset by RESET button or by the stop direction from

the remote controller.

* When the breaker is turned [ON] (In restart time

after power failure) or RESET button is pushed

while the FILTER indicator is turned on, the air

purifier is not turned on until the integrated opera-

tion time of the indoor fan exceeds 1 hour after

operation start (It is nor the air purifier operation

time).

" A trouble detected within 1 minute after

activation of the air is immediately

judged as an error and the FILTER

indicator goes on.

# In case that 1 minute passed after

activation of the purifier, the purifier is

turned off while the PURE indicator

keeps ON. After 10 minutes passed,

restart the purifier and an error is

judged again.

It is the safety measures considering an incomplete

drain when electric dust collector has been cleaned

with water.

13. Discharge

tempera-

1. Purpose

Td value

Control operation

Judges as an error and stops the compressor.

Reduce the compressor speed.

This function detects error on the

refrigerating cycle or error on the

compressor, and performs protective

control.

ture control

120˚C

115˚C

111˚C

108˚C

Reduce slowly compressor speed.

Keeps the compressor speed.

2. Operation

• Control of the compressor speed

The speed control is performed as

described in the left table based upon

the discharge temperature.

If the operation is performed with lower speed

than one commanded by the serial signal, speed

is slowly raised up to the commanded speed.

101˚C

Operates with speed commanded by the serial

signal.

– 50 –

Item

Operation flow and applicable data, etc.

Description

14. Pulse Motor This function controls throttle amount of the refrigerant in

1) When starting the operation, move

the valve once until it fits to the

stopper. (Initialize)

valve

the refrigerating cycle.

(PMV)

control

According to operating status of the air conditioner, this

function also controls the open degree of valve with an

expansion valve with pulse motor.

* In this time, “Click” sound may be

heard.

2) Adjust the open degree of valve by

super heat amount. (SH control)

3) If the discharge temperature was

excessively up, adjust the open

degree of valve so that it is in the

range of set temperature.

Starting up

Initialize

(Discharge temp. control)

4) When defrost operation is per-

formed, the open degree of valve is

adjusted according to each setup

conditions during preparation for

defrost and during defrost opera-

tion (4-way valve is inversed.).

Move to

initial position

5) To turn off the compressor while the

air conditioner stops by control of

the thermostat or by remote

Compressor ON

controller, adjust the open degree

of valve to the setup value before

stop of the compressor.

SH control

release control

PMV open degree control

Stop by

remote controller

Room temp. sensor

(Ta sensor) control

Power OFF

Defrost

* SH (Super Heat amount, cooling operation) =

Tg (Temperature of gas pipe) – Tc (Heat exchanger

temperature of indoor unit)

* SH (Super Heat amount, heating operation) =

Ts (Temperature of suction pipe of the compressor) –

Te (Heat exchanger temperature of outdoor unit)

* PMV: Pulse Motor Valve

– 51 –

Item

Operation flow and applicable data, etc.

Description

15. Clean

1. Purpose

operation

The clean operation is to minimize

the growth of mold, bacteria etc. by

running the fan and drying so as to

keep the inside of the air condi-

tioner clean.

Unit now performing cooling or

dry operation

Push "stop" button

Clean operation

When the cooling or dry operation

shuts down, the unit automatically

starts the clean operation which is

then performed for the specified

period based on duration of the

operation which was performed

prior to the shutdown, after which

the clean operation stops. (The

clean operation is not performed

after a heating operation.)

Only S.CLEAN indicator lights,

and clean operation starts

Time set now elapses

Operation stops

2. Operation

• During clean operations: The louver opens slightly.

The indoor fan operates continuously at a speed of

260 rpm.

1) When the stop signal from the

remote controller is received, the

S.CLEAN indicator (green) on the

main body lights, and the clean

operation starts. (Neither the

OPERATION indicator nor the

TIMER indicator light.)

Clean operation times

Operation mode

Operation time

Clean operation time

Cooling:

Auto (cooling)

Dry

Up to 10 minutes No clean operation

performed (0 minutes)

2) The period of the clean operation is

determined by the duration of the

operation performed prior to the

reception of the stop code.

From 10 minutes 2 hours

up to 1 hour

3) After the clean operation has been

performed for the specified period,

the unit stops operating.

1 hour or longer

4 hours

Heating:

No clean operation performed

Auto (heating)

Auto (fan only)

Shutdown

• To stop an ongoing clean operation at any time

Press the start/stop button on the remote controller

twice during the clean operation. (After pressing the

button for the first time, press it for the second time

without delay (within 10 minutes).)

– 52 –

Item

Operation flow and applicable data, etc.

Setting the clean operation release

Description

16. Clean

operation

release

* J04 will be near the

Add J04 of the indoor P.C. board

assembly.

MUC so take steps to

ensure that it will not be

exposed to excessive

levels of heat. Also

take care to avoid

solder bridging with the

surrounding

* This cancels the auto restart function.

Hold down the auto operation switch on

the indoor unit for at least 3 seconds but

not more than 10 seconds.

components.

The indoor unit’s buzzer emits three

beeps, and the OPERATION indicator

flashes at 5 Hz intervals.

This completes the clean operation

release setting.

Setting the clean operation

Cut J04 of the indoor P.C. board

* This step may be skipped if the auto

restart function is not required.

Hold down the auto operation switch on

the indoor unit for at least 3 seconds but

not more than 10 seconds.

The indoor unit’s buzzer emits three

beeps, and the OPERATION indicator

flashes at 5 Hz intervals.

This completes the clean operation

setting.

Outline diagram of P.C. board

J04

– 53 –

Item

Description

Operation flow and applicable data, etc.

17. Select

1. Purpose

switch on

remote

controller

Push the operation button

This operation is to operate only

one indoor unit using one remote

controller.

on the remote controller.

Select “B” as the setting for

one of the two indoor units

and for the remote controller.

(See below for details.)

YES

2. Description

Both indoor units

start operation.

When operating one indoor unit in a

situation where two indoor units

have been installed in the same

room or nearby rooms, this opera-

tion prevents the remote controller

signal from being received simulta-

neously by both units, thus prevent-

ing both units from operating.

Unnecessary set

[Remote controller select]

3. Operation

The indoor unit on which the

remote controller selection has

been set to B receives the signal of

the remote controller also set to B.

(At the factory the remote controller

selection is set to A on all the

indoor units. There is no A setting

display.)

Setting the remote controller

Switching between A and B is enabled by cutting

the jumper wire inside the battery box using pliers.

HiPOWER

ECO

MEMO

1) Slide open the remote controller cover and

remove the batteries.

1 3 5 9H

SWING

CLR

FIX

FAN

SLEEP

Jumper wire

2) Cut the jumper wire inside the battery

compartment using nippers.

SET

OFF

• The jumper wire should not remain in contact

after being cut. Also, be careful not to let

plastic scraps, jumper wire cuttings or other

debris enter the inside of the remote controller.

CLOCK

RESET

CHECK

3) Insert the batteries. “B” appears in the remote

controller display.

* Even after the jumper wire has been cut,

switching between A and B is still possible by

pressing the CHECK button and FIX button

together.

The A or B setting, which was switched by

pressing the CHECK button and FIX button

together, is restored to the setting established

prior to the switching when the battery is

replaced or the RESET button is pressed.

Cutting direction

Setting the selector switch on the main unit

• Remove the front panel, and then set the selector

switch to “B”.

• After making the switch setting, remount the front

panel.

When switching

between settings “A”

and “B”, always switch

the indoor unit board

and the remote

Position of remote controller selector switch

controller as a pair.

(Otherwise, the indoor

unit will not accept the

remote controller’s

signals.)

Selector switch

– 54 –

9-3-1. How to Set the Auto Restart Function

9-3. Auto Restart Function

To set the auto restart function, proceed as follows:

This indoor unit is equipped with an automatic

restarting function which allows the unit to restart

operating with the set operating conditions in the

event of a power supply being accidentally shut

down. The operation will resume without warning

three minutes after power is restored.

The power supply to the unit must be on ; the

function will not set if the power is off.

Push the [RESET] button located in the center of

the front panel continuously for three seconds.

The unit receives the signal and beeps three times.

This function is not set to work when shipped from

the factory. Therefore it is necessary to set it to

work.

The unit then restarts operating automatically in the

event of power supply being accidentally shut down.

• When the unit is standby (Not operating)

Operation

Motions

Push [RESET] button for more than

three seconds. (Less than

10 seconds)

The unit is on standby.

↓

The unit starts to operate.

The green indicator is on.

↓

After approx. three seconds,

The unit beeps three times

and continues to operate.

The green indicator flashes

for 5 seconds

If the unit is not required to operate at this time, push [RESET] button

once more or use the remote controller to turn it off.

RESET button

• When the unit is in operation

Operation

Motions

Push [RESET] button for more than

three seconds. (Less than

10 seconds)

The unit is in operation.

The green indicator is on.

↓

The unit stops operating.

The green indicator is turned off.

↓

After approx. three seconds,

The unit beeps three times.

The green indicator flashes

for 5 seconds

If the unit is required to operate at this time, push [RESET] button

once more or use the remote controller to turn it on.

RESET button

• When the unit is turned on by this function, the

louver will not swing even though it was swinging

automatically before shutting down.

• While the filter check indicator is on, the RESET

button has the function of filter reset button.

– 55 –

9-3-2. How to Cancel the Auto Restart Function

To cancel auto restart function, proceed as follows :

Repeat the setting procedure : the unit receives the signal and beeps three times.

The unit will be required to be turned on with the remote controller after the main power supply is turned off.

• When the system is on stand-by (not operating)

Operation

Motions

Push [RESET] button for more than

three seconds. (Less than

10 seconds)

The unit is on standby.

↓

The unit starts to operate.

The green indicator is on.

↓

After approx. three seconds,

The unit beeps three times

and continues to operate.

If the unit is not required to operate at this time, push [RESET] button

once more or use the remote controller to turn it off.

RESET button

• When the system is operating

Operation

Motions

Push [RESET] button for more than

three seconds. (Less than

10 seconds)

The unit is in operation.

The green indicator is on.

↓

The unit stops operating.

The green indicator is turned off.

↓

After approx. three seconds,

The unit beeps three times.

If the unit is required to operate at this time, push [RESET] button

once more or use the remote controller to turn it on.

RESET button

9-3-3. Power Failure During Timer Operation

9-4. FILTER Indicator

When the unit is turned off because of power failure

during timer operation, the timer operation is

cancelled. In that case, set the timer operation

again.

When the elapsed time reaches 1000 hours after air

purifier operation, the FILTER indicator lights.

After cleaning the filters, turn off the FILTER

indicator.

NOTE :

9-4-1. How to Turn Off FILTER Indicator

Push [RESET] button on the indoor unit.

NOTE :

The Everyday Timer is reset while a command

signal can be received from the remote controller

even if it stopped due to a power failure.

If [RESET] button is pushed while the FILTER

indicator is not lit, the indoor unit will start the

automatic operation.

When you want a temporary operation while the

FILTER indicator lights, push [RESET] button to

turn off the FILTER indicator. (See page 48)

– 56 –

9-5. Remote Controller and Its Fuctions

9-5-1. Parts Name of Remote Controller

a Infrared signal transmitter

n Automatic operation button (AUTO)

Press this button to operate the air conditioner

automatically.

(A receiving beep is heard.)

o Economy button (ECO)

Press this button to operate the air conditioner

economically.

p PRESET button

Press this button to operate the air conditioner according to

the settings stored using the MEMO button.

q PURE button (PURE)

Press this button to start the electrical air purifying

operation.

Press the button again to stop operation.

r Sleep timer button (SLEEP)

Press this button to start the sleep timer (OFF timer)

operation.

Transmits signals to the indoor unit.

button

Press the button to start operation. (A receiving beep is

heard.) Press the button again to stop operation. (A

receiving beep is heard.)

If no receiving sound is heard from the indoor unit, press

the button twice.

c Mode select button (MODE)

Press this button to select a mode. Each time you press

the button, the modes cycle in order from A: Auto

changeover control,

pump models only),

only) and back to A.

: COOL,

: DRY,

: HEAT (heat

: FAN ONLY (cooling-only models

(A receiving beep is heard.)

TEMP

d Temperature button (

)

You can select the OFF timer time from among four

settings (1, 3, 5 or 9 hours).

.. The temperature setting is increased to 30˚C.

... The temperature setting is reduced to 17˚C.

(A receiving beep is heard.)

e Fan speed button (FAN)

Press this button to select the fan speed. When you select

AUTO, the fan speed is automatically adjusted according to

the room temperature. You can also manually select the

desired fan speed from five available settings.

(LOW , LOW+

HIGH

, MED

, MED+

) (A receiving beep is heard.)

f Auto louver button (SWING)

Press this button to swing the louver. (A receiving beep is

heard.)

Press the button again to stop the louver from swinging. (A

receiving beep is heard.)

g Set louver button (FIX)

AUTO

PURE

Press this button to adjust the air flow direction. (A

receiving beep is heard.)

h ON timer button (ON)

TEMP

MODE

PRESET

Use this button to change the clock and ON timer times.

HiPOWER

ECO

MEMO

To move up the time, press

of the ON

button.

1 3 5 9H

SWING

CLR

FIX

FAN

SLEEP

SET

To move down the time, press

of the ON

button.

OFF

CLOCK

RESET

i OFF timer button (OFF)

CHECK

Use this button to change the OFF timer times.

OFF

To move up the time, press

of the OFF

button.

OFF

To move down the time, press

of the OFF

button.

j Reserve button (SET)

Press this button to store the time settings. (A receiving

beep is heard.)

k Cancel button (CLR)

Press this button to cancel the ON timer and OFF timer. (A

receiving beep is heard.)

l High power button (Hi POWER)

Press this button to start high power operation.

m Memory button (MEMO)

Press this button to ready for storing the settings.

Hold down the button for more than 3 seconds to store the

setting indicated on the remote control and until the

mark is displayed.

– 57 –

9-5-2. Name and Functions of Indications on Remote Controller

[Display]

All indicators, except for the clock time indicator, are displayed by pressing the

button.

a Transmission mark

This transmission mark ( ) indicates when the remote control transmits signals to the indoor unit.

b Mode indicator

adb j

Indicates the current operation mode.

• Heat pump models

(AUTO: Automatic control, A: Auto changeover control,

: HEAT)

• Cooling-only models

(AUTO: Automatic control, A: Auto changeover control,

: FAN ONLY)

: COOL, : DRY,

c Temperature indicator

Indicates the temperature setting (17˚C to 30˚C).

d PURE indicator

Shows that the electrical air purifying operation is in progress.

e FAN speed indicator

i g

In the illustration, all indicators are shown

for purposes of explanation. During

operation, only the relevant indicators are

shown on the remote control.

Indicates the selected fan speed. AUTO or one of five fan speed levels (LOW

LOW+

, MED

, MED+

, HIGH

) can be shown.

: DRY.

Indicates AUTO when the operating mode is either AUTO or

f TIMER and clock time indicator

The time setting for timer operation or the clock time is indicated.

The current time is always indicated except during TIMER operation.

g Hi POWER indicator

Indicates when Hi POWER operation starts.

Press the Hi POWER button to start and press it again to stop operation.

(MEMORY) indicator

Flashes for 3 seconds when the MEMO button is pressed during operation.

The

mark is shown when holding down the button for more than 3 seconds

while the mark is flashing.

Press another button to turn off the mark.

i ECO indicator

Indicates when the ECO is activated.

Press the ECO button to start and press it again to stop operation.

j A. B change indicator remote control

• When the remote control switching function is set, “B” appears in the remote

control display. (When the remote control setting is “A”, there is no indication at this position.)

– 58 –

9-6. Hi-POWER Mode

([Hi-POWER] button on the remote

controller is pushed.)

When [Hi-POWER] button is pushed while the

indoor unit is in Auto, Cooling or Heating operation,

Hi-POWER mark is indicated on the display of the

remote controller and the unit operates as follows.

(1) Automatic operation

• The indoor unit operates in according to the

current operation.

(2) Cooling operation

• The preset temperature drops 1°C.

(The value of the preset temperature on the

remote controller does not change.)

• If the difference between the preset tempera-

ture and the room temperature is big, the

horizontal louver moves to the Hi-POWER

position automatically. Then when the differ-

ence between them gets smaller, the horizon-

tal louver returns automatically.

(3) Heating operation

• The preset temperature increases 2°C.

(The value of the preset temperature on the

remote controller does not change.)

(4) The Hi-POWER mode can not be set in Dry

operation

– 59 –

10. INSTALLATION PROCEDURE

10-1.Installation Diagram of Indoor and Outdoor Units

For the rear left and left

piping

47 mm or more

Hook

Installation

plate

Wall

Hook

140 mm or

74 mm or

Insert the cushion between

the indoor unit and wall, and

tilt the indoor unit for better

installation work.

Hook

Mounting screw

Do not allow the drain hose

to become slack.

Zeolite-plus filter

Cut the piping

hole slightly

sloped

Shield pipe

(for extension

drain hose)

Plasma pure filter

Make sure the drain hose is

sloped downward.

Wireless remote control

Air filters

The auxiliary piping can be

connected at the left, rear

left, rear right, right, bottom

right or bottom left as shown

below.

Remote control holder

80 mm or more only

when unobstructed to

the front and both sides

(Mounting holes on both

left and right sides)

50 mm or more

from wall

As shown in the

figure, position

power cord and

connecting

In principle,

leave open

Remote control

(C)

Right

Rear

holder mounting

screw

(D)

100 mm or

more from wall

When installing the

outdoor unit, leave open

in at least two of

directions (A), (B), (C)

and (D) shown in the

right figure.

power cord

Extension drain hose

(Option: RB–821SW)

Ensure sufficient space

to allow drainage

• Total piping length: Two room (A+B) Multi

• This air conditioner accepts a connection piping length

of up to 30 m.

• There is no need to add refrigerant as long as the

length of the connection piping is 20 m or less.

Outdoor

unit

You will need to add 20 g of refrigerant per meter of

added connection piping for installations requiring

connection piping to be between 21 m to 30 m.

•

• Minimum piping length:

A or B = 2 m or more

Maximum indoor piping length:

A or B = 20 m or less

Maximum piping height difference:

A or B = 10 m or less

Maximum piping / height difference

between two rooms = 10 m or less

•

If the outdoor unit is to be mounted on a wall, make sure the platform supporting it is sturdy enough.

The platform should be designed and manufactured to maintain its strength over a long period of time, and sufficient consideration

should be given to ensuring that the outdoor unit will not fall.

•

When the outdoor unit is to be mounted high on a wall, take particular care to ensure that parts do not fall, and that the installer is

protected.

When doing installation work at ground level, it is usual to make wiring and pipe connections to the indoor units, first, and then to

make connections to the outdoor unit.

However, if outdoor work is difficult it is possible, instead, to make changes to the procedure.

For example, by making adjustments to the wiring and piping lengths on the inside (rather than the outside).

• A place where the drain water does not cause any problems.

•

The outdoor unit should not be installed with one indoor unit only. Be sure the (outdoor) unit is installed with at least two indoor

units.

Precautions for Adding Refrigerant

•

Use a scale having a precision with at least 10 g per index line when adding the refrigerant. Do not use a bathroom scale or similar

instrument.

•

Use liquid refrigerant when refilling the refrigerant. Since the refrigerant is in liquid form, it can fill quickly. Therefore, perform the

filling operation carefully and insert the refrigerant gradually.

– 70 –

CAUTION

1. Install the outdoor unit without anything blocking the discharging air.

2. When the outdoor unit is installed in a place always exposed to strong winds like on the coast or on a high story of a

building, secure the normal fan operation using a duct or a wind shield.

3. Especially in windy areas, install the unit to prevent the admission of wind.

4. Installation in the following places may result in trouble. Do not install the unit in such places.

•

A place full of machine oil.

A saline-place such as the coast.

A place full of sulfide gas.

•

• A place where high-frequency waves are likely to be generated, such

as from audio equipment, welders, and medical equipment.

Strong

wind

Draining the water

•

Holes are provided on the base plate of the outdoor unit to ensure that the

defrost water produced during heating operations is drained off efficiently. If a

centralized drain is required when installing the unit on a balcony or wall, follow

the steps below to drain off the water.

Water-proof rubber

caps (supplied with the

outdoor unit)

1. Proceed with water-proofing by installing the water-proof rubber caps in the

2 elongated holes on the base plate of the outdoor unit.

[How to install the water-proof rubber caps]

1) Place four fingers into each cap, and insert the caps into the water drain

holes by pushing them into place from the underside of the base plate.

2) Press down on the outer circumferences of the caps to ensure that they

have been inserted tightly.

Base plate

Drain nipple

(Water leaks may result if the caps have not been inserted properly, if their

outer circumferences lift up or the caps catch on or wedge against

something.)

2. Install the drain nipple ^cand a commercially available drain hose (with 16 mm

Base plate

inside diameter), and drain off the water.

Drain nipple

(For the position where the drain nipple is installed, refer to the installation

diagram of the indoor and outdoor units.)

Commercially available

drain hose

•

Check that the outdoor unit is horizontal, and route the drain hose at a

downward sloped angle while ensuring that it is connected tautly.

Do not use ordinary garden hose, which can flatten and

prevent water from draining.

– 71 –

10-5-2. Refrigerant Piping Connection

Flaring

1. Cut the pipe with a pipe cutter.

Warp

Roughness

Obliquity

2. Insert a flare nut into the pipe, and flare the pipe.

•

Projection margin in flaring: A (Unit: mm)

Rigid (Clutch type)

Outer diameter of copper pipe

R410A tool used

0 to 0.5

Conventional tool used

1.0 to 1.5

6.35

9.52

12.7

0 to 0.5

1.0 to 1.5

0 to 0.5

1.0 to 1.5

Imperial (Wing nut type)

Outer diameter of copper pipe

R410A

6.35

9.52

12.7

1.5 to 2.0

2.0 to 2.5

Die

Pipe

3. Flaring size : B (Unit : mm)

–0.4

Outer diameter of copper pipe

R410A

R22

9.0

6.35

9.52

12.7

9.1

13.2

16.6

13.0

16.2

•

In case of flaring for R410A with the conventional flare tool, pull it out approx. 0.5 mm more than that of R22 to adjust to the

specified flare size. The copper pipe gauge is useful for adjusting projection margin size.

Tighten the connection

Align the centers of the connecting pipes and tighten the flare nut as much as possible with your fingers. Then tighten the nut with a

wrench and torque wrench as shown in the figure.

Flare nut

Half union

Internally threaded side

Externally threaded side

Use a wrench to secure.

Use a torque wrench to tighten.

CAUTION

Do not apply excessive force. Otherwise, the nut may break.

•

(Unit: N·m)

Flare at indoor

unit side

Outer diameter of copper pipe

Tightening torque

14 to 18 (1.4 to 1.8 kgf·m)

φ6.35 mm

9.52 mm

33 to 42 (3.3 to 4.2 kgf·m)

50 to 62 (5.0 to 6.2 kgf·m)

12.7 mm

Flare at outdoor unit side

– 72 –

• Tightening torque for connection of flare pipe

The pressure of R410A is higher than R22. (Approx. 1.6 times.) Therefore securely tighten the flare pipes which connect the outdoor

unit and the indoor unit with the specified tightening torque using a torque wrench.

If any flare pipe is incorrectly connected, it may cause not only a gas leakage but also trouble in the refrigeration cycle.

6.35

Connectable capacity class

Total

Unit B

9.52

M14

M18

10, 13

6.35

10, 13, 16

Unit A

9.52

*1 When connecting a capacity class 16 pipe to the indoor unit, attach the

expander which is available as an optional accessory to the 9.52 mm

diameter packed valve of the outdoor unit.

Indoor unit

Outdoor unit

10-5-3. Evacuating

After the piping has been connected to the indoor unit, perform the air purge.

AIR PURGE

Evacuate the air in the connecting pipes and in the indoor unit using a vacuum pump. Do not use the refrigerant in the outdoor unit.

For details, see the vacuum pump manual.

Use a vacuum pump

Compound pressure gauge

Pressure gauge

Be sure to use a vacuum pump with counter-flow prevention function so that

oil inside the pump does not flow back into the air conditioner pipes when the

pump stops. (If oil inside the vacuum pump enters into the air conditioner

circuit which uses R410A, trouble with the refrigeration system may develop.)

1. Connect the charge hose from the manifold valve to the service port of

the gas side packed valve.

–101 kPa (–76 cmHg)

Handle Lo

Manifold valve

Handle Hi

(Keep full closed)

Charge hose

(For R410A only)

Charge hose

2. Connect the charge hose to the port of the vacuum pump.

3. Open fully the low pressure side handle of the gauge manifold valve.

4. Operate the vacuum pump to begin evacuating. Perform evacuating for

about 15 minutes if the piping length is 20 meters (15 minutes for 20

meters) (assuming a pump capacity of 27 liters per minute). Confirm that

the compound pressure gauge reading is –101 kPa (–76 cmHg).

5. Close the low pressure valve handle of gauge manifold.

6. Open fully the valve stem of the packed valves (both sides of Gas and

Liquid).

(For R410A only)

Connecting pipe

Vacuum pump adapter for

counter-flow prevention

(For R410A only)

Vacuum

pump

7. Remove the charging hose from the service port.

8. Securely tighten the caps on the packed valves.

9. Perform steps 1 through 8 above on each connected indoor unit.

Packed valve at liquid side

Packed valve at gas side

Service port

(Valve core (Setting pin))

CAUTION

• IMPORTANT POINTS FOR PIPING WORK

(1) Keep dust and moisture from entering the pipes.

(2) Tighten connections carefully (between pipes and unit).

(3) Evacuate the air in the connecting pipes using a VACUUM PUMP.

(4) Check for gas leaks at all connections.

– 73 –

Packed valve handling precautions

• Open the valve stem all the way; but do not try to open it beyond the stopper.

Securely tighten the valve stem cap with torque in the following table:

Gas side

12.7 mm)

Gas side

9.52 mm)

Liquid side

6.35 mm)

Service port

50 to 62 N·m

(5.0 to 6.2 kgf·m)

Hexagon wrench

is required.

(

33 to 42 N·m

(3.3 to 4.2 kgf·m)

(φ

4 mm

14 to 18 N·m

(1.4 to 1.8 kgf·m)

(φ

14 to 18 N·m

(1.4 to 1.8 kgf·m)

10-5-4. Wiring Connection

1. Remove the valve cover, the electric parts cover and the cord clamp from the outdoor unit.

2. Connect the connecting cable to the terminal as identified by the matching numbers on the terminal block of indoor and outdoor

unit.

3. Insert the power cord and the connecting cable fully into the terminal block and secure it tightly with screws.

4. Insulate the unused cords (conductors) from water entering in the outdoor unit. Locate them so that they do not touch any

electrical or metal parts.

5. Secure the power cord and the connecting cable with the cord clamp.

6. Attach the electric parts cover and the valve cover on the outdoor unit.

Stripping length of connecting cable

Terminal block

1 2

Earth line

Power cord

Earth line

Connecting

cable

Connecting

cable for unit A

Power cord

Connecting

cable for unit B

Model

Power source

RAS-M14EAV-E

RAS-M18EAV-E

220–240V ~50Hz

220V ~60Hz

RAS-M14EACV-E

RAS-M18EACV-E

Maximum running current

Installation fuse rating

10.0A

15.0A

25A (D type

8.0A

11.0A

)

Power cord

H07RN-F or 245IEC66 (1.5 mm or more)

Connecting cable

H07RN-F or 245IEC66 (1.0 mm or more)

CAUTION

• Incorrect wiring connection may cause electrical parts to burn out.

• Be sure to comply with local regulations/codes when running the wire from outdoor unit to indoor unit. (Size of wire and wiring

method etc.)

• Every wire must be securely connected.

• This installation fuse (25A D type

) must be used for the power supply line.

• If incorrect or incomplete wiring is carried out, fire or smoke may result.

• Prepare the power supply for the exclusive use of the air conditioner.

• This product can be connected to the main breaker.

Connection to fixed wiring: A switch which disconnects all poles and has a contact separation of at least 3 mm must be

incorporated in the fixed wiring when connecting to a main breaker circuit.

– 74 –

10-6. Grounding

This air conditioner must be grounded without fail.

Grounding is necessary not only to safeguard against the possibility of receiving an electric shock but also to absorb both the static,

which is generated by high frequencies and held in the surface of the outdoor unit, and noise since the air conditioner incorporates a

frequency conversion device (called an inverter) in the outdoor unit. If the air conditioner is not grounded, users may receive an

electric shock if they touch the surface of the outdoor unit and that unit is charged with static.

10-7. Check and Test Operation

For R410A, use the leak detector exclusively manufactured for HFC refrigerant (R410A, R134a, etc.)

* The conventional leak detector for HCFC refrigerant (R22, etc.) cannot be used because its sensitivity for HFC refrigerant lowers to

approx. 1/40 of that manufactured exclusively for HFC refrigerant.

• Pressure of R410A becomes approx. 1.6 times that of R22. If

installation work has not completely finished, gas leaks may occur in

cases such as when pressure rises during operation.

• Check the flare nut connections, valve stem cap connections and

service port cap connections for gas leaks with a leak detector or

soap water.

Flare nut connections

(Indoor unit)

Flare nut connections (Outdoor unit)

Valve stem cap connection

Service port cap connection

CAUTION

• Use a circuit breaker of a type that is not tripped by shock waves.

• Incorrect/incomplete wiring will cause electrical fires or smoke.

• Prepare the power source for exclusive use with the air conditioner.

• Proceed as follows when connecting the product to the mains power.

• Connection to fixed wiring:

A switch or circuit breaker which disconnects all poles and has a contact separation of at least 3 mm must be incorporated

into the fixed wiring.

Utilize only approved short circuit breakers and switches.

* (A breaker having sensitivity of approximately 0.1 second or less and capacity of approximately 30 mA is usually used.)

Miswiring (Mis-piping) Check

Make sure that the wiring and piping for each room have the same alphabetical code (A, B).

Connect and secure the power cord.

Use the power cord/cables with thickness, type, and protective devices specified in this manual.

Insulate the unused cords (conductors) with PVC tape.

1. Turn on the electrical power breaker.

2. Operate the indoor unit in cooling mode.

3. Start checks.

• Run the indoor unit in room A, and confirm cool air blows out.

• Confirm the indoor unit in room B is not running. (Also check at this time that refrigerant, which can be heard, is not flowing.)

• Stop operation of the indoor unit in room A and execute the same checks on the indoor unit in room B.

– 75 –

10-8.Test Operation

Gas Leak Test

Valve cover

• Check the flare nut connections for gas leaks with a

gas leak detector and/or soapy water.

Check

places for

indoor unit

Electric parts cover

Check places for outdoor unit

Test Operation

To test the system, press and hold RESET button for 10 sec.

(There will be one short beep.)

RESET button

Auto Restart Setting

This product is designed so that, after a power failure, it can restart automatically in the same operating mode as before the power

failure.

INFORMATION

The product was shipped with Auto Restart function in the OFF position. Turn it ON as required.

How to set the Auto Restart

• Press and hold the RESET button for about 3 seconds. After 3 seconds, three short electric beeps will be heard to inform you that

the Auto Restart has been selected.

• To cancel the Auto Restart, follow the steps described in the section Auto Restart Function on page 56.

Position of remote control selector switch

Remote Control Selector Switch Setting

Remote control selector switch

• If two indoor units are installed in the same room or adjoining rooms, the

second unit can inadvertently receive a remote control signal and start

operation when operating the first unit. This can be prevented by setting one of

the indoor units and the corresponding remote control to the B setting (the A

setting is the default setting).

Selector switch

1. Setting the selector switch on the main unit

• Remove the front panel, and then set the selector switch to “B”.

• After making the switch setting, remount the front panel.

2. Setting the remote control

Cutting direction

HiPOWER

ECO

FAN

MEMO

5 9H

a Slide open the remote control cover and remove the batteries.

b Cut the jumper wire inside the battery compartment using nippers.

• The jumper wire should not remain in contact after being cut. Also, be

careful not to let plastic scraps, jumper wire cuttings or other debris enter

the inside of the remote control.

SWING

CLR

FIX

SLEEP

Jumper wire

SET

OFF

CLOCK

RESET

When switching between

settings “A” and “B”, always

switch the indoor unit board

and the remote control as a

pair. (Otherwise, the indoor

unit will not accept the remote

control’s signals.)

CHECK

c Insert the batteries. “B” appears in the remote control display.

3. Check that the indoor unit can be operated by the modified remote control.

– 76 –

10-9. USEFUL FUNCTIONS

Self-Diagnosis by LED Indication

For this outdoor unit, by referring to the 5 LED (Red) indicator lights, self-diagnosis is possible.

LEDS (Red, D09 to D13) are located on the sub-control board underneath the inverter.

•

LED indication

Indoor alarm

Contents

code

D09 D10 D11 D12 D13

Normal running

None

IGBT short circuit, Compressor motor rear short

Trouble on position detecting circuit

Trouble on current detecting circuit

CONDENSOR PIPE TEMP. SENSOR(TE) fault

SUCTION PIPE TEMP. SENSOR(TS) fault

DISCHARGE PIPE TEMP. SENSOR(TD) fault

Trouble on outdoor fan

OUTDOOR TEMP. SENSOR(TO) fault

Trouble on compressor system

GAS SIDE PIPE TEMP. SENSOR a (TGa) fault

GAS SIDE PIPE TEMP. SENSOR b (TGb) fault

TGa, TGb sensor out of place, PMV fault

Communication trouble between MCU

Compressor lock

Trouble on discharge temp. Gas leakage

Compressor break down

: LED ON,

: LED OFF

• These LEDs do not normally light.

1. If trouble occurs, LED (Red) goes on according to the contents of trouble

as shown in the table above.

2. When two or more troubles occur, LEDs go on cyclically (alternately).

3. When the trouble is eliminated, LEDs (Red) go off.

D09 D10 D11 D12 D13

LED (Red)

This product is compliant with Directive 2002/96/EC, and cannot be disposed as unsorted

municipal waste.

This product must be returned to the appropriate collection facility, as specified by your

municipality.

– 77 –

11. HOW TO DIAGNOSE THE TROUBLE

The pulse motor circuits are mounted to both indoor

Table 11-1

and outdoor units. Therefore, diagnose troubles

according to the trouble diagnosis procedure as

described below. (Refer to the check points in

servicing written on the wiring diagrams attached to

the indoor/outdoor units.)

No.

Troubleshooting Procedure

Page

First Confirmation

Primary Judgment

Judgment by Flashing LED of Indoor Unit

Self-Diagnosis by Remote Controller

Judgment of Trouble by Every Symptom

How to Check Simply the Main Parts

Precautions when handling the new inverter (3DV Inverter)

! CAUTION: HIGHVOLTAGE

The high voltage circuit is incorporated.

Be careful to do the check service, as the electric shock may be caused in case of touching parts on the

P.C. board by hand.

The new inverter (3DV inverter) will be incorporated starting with this unit.

(3DV: 3-shunt Discrete Vector control)

ꢀ The control circuitry has an uninsulated construction.

IGBT x 6

Compressor

G-Tr

Compressor

Shared

potential

Photocoupler

Driver Amplifier

Separate

potential

Fan motor

MCU

Fan motor

FET x 6

FET(6in1)

Driver

Amplifier

Hall device

Photocoupler

M18YAV-E, M18YACV-E (insulated type)

EAV-E, EACV-E series (uninsulated type)

CAUTION!!

A high voltage (equivalent to the supply voltage) is also energized

to ground through the sensors, PMV and other low-voltage cir-

cuits. The sensor leads and other wires are covered with insulated

tubes for protection. Nevertheless, care must be taken to ensure

that these wires are not pinched.

Sensor leads

CAUTION!!

Take sufficient care to avoid directly touching any of the circuit

parts without first turning off the power.

CAUTION!!

At times such as when the circuit board is to be replaced, place the

circuit board assembly in a vertical position.

Laying the board flat on an electrically conductive object (such as the

top panel of the air conditioner's outdoor unit) while a charge is still

retained by the electrolytic capacitors of the inverter's main circuit may

cause short-circuiting between the electrolytic capacitors and second-

ary circuit components and result in damage to the components.

Do NOT lay the circuit

board assembly flat.

– 78 –

Precautions when inspecting the control section of the outdoor unit

NOTE :

A large-capacity electrolytic capacitor is used in the outdoor unit controller (inverter). Therefore, if the power

supply is turned off, charge (charging voltage DC280 to 380V) remains and discharging takes a lot of time. After

turning off the power source, if touching the charging section before discharging, an electrical shock may be

caused. Discharge the electrolytic capacitor completely by using soldering iron, etc.

< Discharging method >

(1) Remove the inverter cover (plating) by opening four mounting claws.

(2) As shown below, connect the discharge resistance (approx. 100Ω40W) or plug of the soldering iron to voltage

between + – terminals of the C14 (“CAUTION HIGH VOLTAGE” is indicated.) electrolytic capacitor (760µF/

400V) on P.C. board, and then perform discharging.

Inverter cover

Discharging position

(Discharging period

10 seconds or more)

P. C. board

(Soldered surface)

Plug of

soldering iron

Fig. 11-1

– 79 –

11-1. First Confirmation

11-1-1. Confirmation of Power Supply

Confirm that the power breaker operates (ON) normally.

11-1-2. Confirmation of Power Voltage

Confirm that power voltage is AC 220–230–240 ± 10%. If power voltage is not in this range, the unit may not

operate normally.

11-1-3. Operation Which is not a Trouble (Program Operation)

For controlling the air conditioner, the program operations are built in the microcomputer as described in the

following table. If a claim is made for running operation, check whether or not it meets to the contents in the

following table. When it does, we inform you that it is not trouble of equipment, but it is indispensable for control-

ling and maintaining of air conditioner.

Table 11-1-1

No.

Operation of air conditioner

Description

When power breaker is turned “ON”, the

The OPERATION indicator of the indoor unit flashes

OPERATION indicator (Green) of the indoor when power source is turned on. If [START/STOP] button

unit flashes.

is operated once, flashing stops. (Flashes also in power

failure)

Compressor may not operate even if the

room temperature is within range of com-

pressor-ON.

The compressor does not operate while compressor

restart delay timer (3-minutes timer) operates.

The same phenomenon is found after power source has

been turned on because 3-minutes timer operates.

In Dry and ECO mode, FAN (air flow)

display does not change even though FAN

(air flow select) button is operated.

The air flow indication is fixed to [AUTO].

Increasing of compressor motor speed

stops approx. 30 seconds after operation

started, and then compressor motor speed

increases again approx. 30 seconds after.

For smooth operation of the compressor, the compressor

motor speed is restricted to Max. 41 rps for 2 minutes,

and Max.91 rps for 2 minutes to 3 minutes, respectively

after the operation has started.

The set value of the remote control should

be below the room temperature.

If the set value is above the room temperature, Cooling

operation is not performed. And check whether battery of

the remote control is consumed or not.

In AUTO mode, the operation mode is

changed.

After selecting Cool or Heat mode, select an operation

mode again if the compressor keeps stop status for 15

minutes.

In HEAT mode, the compressor motor

speed does not increase up to the maxi-

mum speed or decreases before the

temperature arrives at the set temperature.

The compressor motor speed may decrease by high-

temp. release control (Release protective operation by

temp.-up of the indoor heat exchanger) or current release

control.

Cool, Dry, or Heat operation cannot be

performed.

When the unit in other room operates previously in

different mode, Fan Only operation is performed because

of first-push priority control. (Cool operation and Dry

operation can be concurrently performed.)

– 80 –

11-2. Primary Judgment

To diagnose the troubles, use the following methods.

(1) Judgment by flashing LED of indoor unit

(2) Self-diagnosis by service check remote controller

(3) Judgment of trouble by every symptom

Firstly use the method (1) for diagnosis. Then, use the method (2) or (3) to diagnose the details of troubles.

For any trouble occured at the outdoor unit side, detailed diagnosis is possible by 5-serial LED on the inverter

P.C. board.

11-3. Judgment by Flashing LED of Indoor Unit

While the indoor unit monitors the operation status of the air conditioner, if the protective circuit operates, the

contents of self-diagnosis are displayed with block on the indoor unit indication section.

Table 11-3-1

Check

code

Item

Block display

Description for self-diagnosis

OPERATION (Green)

Flashing display (1 Hz)

Power failure (when power is ON)

Indoor indication

lamp flashes.

OPERATION (Green)

Flashing display (5 Hz)

Protective circuit operation for indoor P.C. board

Which lamp

does flash?

OPERATION (Green)

TIMER (Yellow)

Flashing display (5 Hz)

Protective circuit operation for connecting cable

and serial signal system

OPERATION (Green)

FILTER (Orange)

Flashing display (5 Hz)

Protective circuit operation for outdoor P.C. board

OPERATION (Green)

TIMER (Yellow)

FILTER (Orange)

Protective circuit operation for others

(including compressor)

Flashing display (5 Hz)

NOTES :

(1) The contents of items B and C and a part of item E are displayed when air conditioner operates.

(2) When item B and C, and item B and a part of item E occur concurrently, priority is given to the block of item B.

(3) The check codes can be confirmed on the remote controller for servicing.

– 81 –

11-4. Self-Diagnosis by Remote Controller (Check Code)

(1) If the indicators light as shown B to E in Table 11-3-1, excute the self-diagnosis by the remote controller.

(2) When the remote controller is set to the service mode, the indoor controller diagnoses the operation condition

and indicate the information of the self-diagnosis on the display of the remote controller with the check

codes. If a fault is detected, all indicators on the indoor unit will flash at 5Hz and it will beep for 10 seconds

(Pi, Pi, Pi ... ). The TIMER indicator usually flashes (5Hz) during self-diagnosis.

11-4-1. How to Use Remote Controller in Service Mode

Push [CHECK] button with a tip of pencil to set the

remote controller to the service mode.

• “

” is indicated on the display of the remote

controller.

Push [ON ] or [OFF ] button

If there is no fault with a code, the indoor unit will beep

once (Pi) and the display of the remote controller will

change as follows :

• • •

AUTO

PURE

TEMP

• The TIMER indicator of the indoor unit flashes continuously.

(5 times per 1 sec.)

MODE

PRESET

• Check the unit with all 52 check codes (

as shown in Table-10-4-1.

)

HiPOWER

ECO

MEMO

1 3 5 9H

• Push [ON ] or [OFF ] button to change the check

code backward.

SWING

CLR

FIX

FAN

SLEEP

SET

OFF

CLOCK

RESET

CHECK

If there is a fault, the indoor unit will beep for 10

seconds (Pi, Pi, Pi...).

Note the check code on the display of the remote

controller.

• 2-digits alphanumeric will be indicated on the display.

Alphanumeric characters are

used for the check codes.

• All indicators on the indoor unit will flash.

(5 times per 1 sec.)

is 5.

is A.

is C.

is 6.

is B.

is D.

Push [START/STOP] button to release the service mode.

• The display of the remote controller returns to as it

was before service mode was engaged.

Time shotening method.

1. Push SET button while pushing CHECK button.

2. Push [START/STOP] button.

Fig. 11-4-1

– 82 –

11-4-2. Caution at Servicing

(1) After servicing, push the START/STOP button to return to the normal mode.

(2) After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power

supply again so that memory in the microcomputer returns the initial status. However, the check codes are

not deleted even if the power supply is turned off because they are stored in the fixed memory.

(3) After servicing, push [CLR] button under check mode status and then send the check code “7F” to the indoor

unit.The error code stored in memory is cleared.

Table 11-4-1

Block distinction

Operation of diagnosis function

Air

Judgment and action

Check

code

Check

code

Block

Cause of operation

conditioner

status

Remarks

Indoor P.C.

board etc.

Short-circuit or discon-

nection of the room

temperature sensor

(TA sensor).

Operation Displayed when

continues. error is detected.

1. Check the room temp. sensor.

2. When the room temp. sensor is

normal, check P.C. board.

Being out of place,

disconnection, short-

circuit, or migration of

heat exchanger sensor

(TC sensor)

Operation Displayed when

continues. error is detected.

1. Check heat exchanger sensor.

2. When heat exchanger sensor is

normal, check P.C. board.

Lock of indoor fan or

trouble on the indoor fan

circuit

All off

Displayed when

error is detected.

1. Check the motor.

2. When the motor is normal,

check P.C. board.

Not

displayed

Trouble on other indoor

P.C. boards

Operation Displayed when

continues. error is detected.

Replace P.C. board.

Connecting

cable and

serial signal

Return serial signal is

not sent to indoor side

from operation started.

Operation Flashes when

continues. trouble is detected

on Return serial

1. When the outdoor unit never

operate:

(1) Check connecting cable,

and correct if defective

wiring.

signal, and normal

status when signal

is reset.

(1) Defective wiring of

connecting cable

(2) Operation of

compressor thermo.

Gas shortage Gas

leak

(2) Check 25A fuse of inverter

P.C. board.

(3) Check 3.15A of inverter P.C.

board.

2. To display [Other] block during

operation, check compressor

thermo. operation and supply

gas (check gas leak also).

3. Unit operates normally during

check.

If Return serial signal does not

stop between indoor terminal

board 2 and 3, replace inverter

P.C. board.

If signal stops between indoor

terminal board 2 and 3, replace

indoor P.C. board.

Outdoor P.C.

board

Inverter over-current

protective circuit

operates. (Short time)

All off

Displayed when

error is detected. operations stop immediately. :

Replace P.C. board.

Even if trying operation again, all

Position-detect circuit

error or short-circuit

between windings of

compressor

Displayed when

error is detected.

1. Even if connecting lead wire of

compressor is removed,

position-detect circuit error

occurred. : Replace P.C. board.

2. Measure resistance between

wires of compressor, and

perform short-circuit. : Replace

compressor.

– 83 –

Block distinction

Operation of diagnosis function

Air

Judgment and action

Check

Block

Check

code

Cause of operation

conditioner

status

Remarks

code

Outdoor P.C.

board

Current-detect circuit

error

All off

Displayed when

error is detected. operations stop immediately. :

Replace P.C. board.

Even if trying operation again, all

Being out of place,

disconnection or short-

circuit of outdoor temp.

sensor (Ts)

Displayed when

error is detected. 1. Check outdoor temp. sensors

Check 5-serial LED.

(TE, TS).

2. Check P.C. board.

Disconnection or short- All off

circuit of discharge

temp. sensor

Displayed when

error is detected.

1. Check discharge temp. sensor

(TD).

2. Check P.C. board

Outdoor fan drive

system error

All off

Displayed when

error is detected. protective operation of outdoor fan

drive system, fan lock, etc. :

Position-detect error, over-current

Replace P.C. board or fan motor.

Not

displayed

Outdoor temp. sensor

error

Operation

continues

1. Check outdoor temp. sensor

(TO).

——

2. Check P.C. board.

Outdoor P.C.

board

Compressor drive

All off

Displayed when

Check 5-serial LED.

output error, Compres-

sor error (lock, missing,

etc.), Break down

error is detected. When 20 seconds passed after

start-up, position-detect circuit

error occurred. : Replace

compressor.

Error exclusive for

multiple type

All off

Displayed when

Check 5-serial LED.

error is detacted. 1. Miswiring of connecting wire of

A/B rooms in indoor/outdoor

units

2. Check gas leakage.

3. Check disconnection of sensor.

4. Electronic control valve error

Others

(including

compres-

sor)

Return serial signal has Operation Flashes when

1. Repeat Start and Stop with

interval of approx. 10 to 40

minutes. (Code is not displayed

during operation.)

Supply gas. (Check also gas

leak).

2. Unit operates normally during

check.

If return serial signal does not

stop between indoor terminal

block 2 and 3, replace inverter

P.C. board.

been sent when

operation started, but it

is not sent from

halfway.

(1) Compressor thermo.

operation

continues trouble is detected

on return serial

signal, and normal

status when signal

is reset.

Gas shortage

Gas leak

(2) Instantaneous

power failure

If signal stops between indoor

terminal block 2 and 3, replace

indoor P.C. board.

Compressor does not

rotate.

All off

Displayed when

error is detected.

1. Trouble on compressor

2. Trouble on wiring of compres-

sor (Missed phase)

(Current protective

circuit does not operate

when a specified time

passed after compres-

sor had been acti-

vated.)

Discharge temp.

exceeded 117°C

All off

Displayed when

error is detected.

1. Check dischage temp. sensor

(TD).

2. Gas leakage

3. Trouble on P.M.V.

Break down of

compressor

Displayed when

error is detected.

1. Check power voltage.

(220–230–240 V +10%)

2. Overload operation of refrigera-

tion cycle

Check installation condition

(Short-circuit of outdoor diffuser).

– 84 –

11-5. Judgment of Trouble by Every Symptom

11-5-1. Indoor Unit (Including Remote Controller)

(1) Power is not turned on (Does not operate entirely)

1. Is the supply voltage normal?

Operation

Check Item

2. Is the normal voltage provided to the outdoor unit?

3. Is the crossover cable connected properly?

4. Is the fuse (F01) blown?

Considerable principle cause

Turn off power supply once, and

5 second later, turn it on again.

Measures

Item by symptoms

Is OPERATION indicator flashing?

YES

Is it possible to turn on

power supply by pushing

[START/STOP] button

on remote controller?

Does transmission mark

on remote controller flash

normally,and is its signal

transmitted properly?

Remote controller is defective.

YES

Refer to (5) “Troubleshooting

for remote controller”.

Unit operates normally.

Does fan

YES

Is fuse (F01)

of indoor control

board blown?

Parts (R04, R05, DB01, C01,

C03, IC01 and T01) are defective.

motor connector

between CN10 1 –

3 short-circuit?

Is voltage

(DC12V or 5V)

indicated on rear of

indoor control

YES

Microcomputer

is defective.

Replace main

P.C. board

board normal?

Is DC310–340V

supplied between

CN10 1 – 3 ?

Parts of a power supply circuit

defective.

YES

Replace fan

motor.

• Be sure to disconnect the motor connector CN10 after shut off the power supply, or it will be a cause of

damage of the motor.

(2) Power is not turned on though Indoor P.C. board is replaced

Turn on power supply.

Is wired correctly to white and black

lead wires of terminal block?

Does OPERATION indicator flash?

YES

Correct wiring.

YES

To item of “Power supply

is not turned on”.

– 85 –

(3) Only the indoor motor fan does not operate

1. Is it possible to detect the power supply voltage (AC220–240V) between

and

# $

on the terminal block?

2. Does the indoor fan motor operate in cooling operation?

(In heating operation, the indoor fan motor does not operate for approximately 10 minutes after it is turned on,

to prevent a cold air from blowing in.)

Turn off power

supply once, and

turn it on again.

Is it possible to detect

YES

DC 1V or more between

Does fan motor

and

– of

continue to operate?

Peplace indoor

fan motor.

motor connector (CN10).

YES

Start to operate

indoor unit in cooling

operation at airflow

level “LOW”.

Is it possible to detect

DC 310–340V between

Does indoor

fan operate?

and

–

of motor

connector (CN10).

YES

Turn off indoor unit and remove

(Motor connection condition)

Is it possible to detect DC 15V

NO connector from motor.

Then push START/STOP button

on remote controller to stop

flashing indicator on indoor unit.

between

and

– of

motor connector (CN10).

YES

Is it possible to detect

DC 15V between

Peplace main

P.C. board.

Change airflow level

to “HIGH”.

and

– of motor

connector (CN10).

YES

Start to operate the

indoor unit in except

Turn off indoor unit and

heating operation.

remove connector from motor.

Then start to operate indoor

unit with remote controller.

At this time, is it possible to

detect DC 1V or more between

and

– of motor

connector (CN10)?

YES

Start to operate the

indoor unit in except

heating operation.

At this time, is it possible

to detect DC 1V or more

Is it possible to

change airflow level

to “HIGH”?

between

and

–

of motor connector (CN10)?

(Check this condition

within 15 seconds after

starting unit.)

YES

Is it possible to

Peplace

bearing.

rotate cross-flow fan by

hand properly?

YES

Turn off indoor unit

and rotate cross-flow

fan by hand when the

unit is on standby.

At this time, is it possible to

detect DC 1V or more

between

and

–

of motor connector

(CN10).

Fan motor

operates normally.

YES

– 86 –

(4) Indoor fan motor automatically starts to rotate by turning on power supply

<Cause>

The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to inside of the motor.

If the P.C. board is soldered imperfectly or the IC is defective, the fan motor may automatically rotate by turning

on power supply.

1. Remove the front panel. (Remove 2 screws.)

2. Remove the cover of the fan motor lead wires.

3. Check DC voltage with CN10 connector while the fan motor is rotating.

NOTE :

• Do not disconnect the connector while the fan motor is rotating.

• Use a thin test rod.

Indoor fan starts rotating when power supply is turned on.

P.C. board

CN10

(Check output DC voltage of fan motor on P.C. board.)

6 (Blue)

5 (Yellow)

4 (White)

3 (Black)

Yellow

Black

Measure voltage between 3 (GND : BLACK)

and 5 (V line : YELLOW) of motor connector (CN10)

while indoor fan motor is rotating.

–

1 (Red)

DC 1.0V or more

P.C. board is defective.

Replace P.C. board.

Under DC 1.0V

Motor is defective.

Replace motor.

– 87 –

(5) Troubleshooting for remote controller

Check that A or B selected on the main unit is matched with A or B selected on the remote controller.

The unit does not beep at all.

Push the START/STOP button. OPERATION indicator on

indoor unit is not lit.

Is transmission

mark indicated?

YES

Is receiver

on indoor unit

exposed to

Push RESET button

on remote controller

with tip of pencil.

direct sunlight?

YES

Does indoor unit

operate when moving

remote controller

near receiver or

indoor unit?

Is there any

thyristor

fluorescent light

nearby?

YES

Batteries are

exhausted.

Push the START/

STOP button

Does indoor unit

start to operate by

automatic restart

function?

Is transmission

mark indicated?

YES

Does indoor unit

beep and operate?

YES

Does radio sound

is affected by remote

controller when a signal is

transmitted at distance of

5 cm from radio?

YES

Remote controller

is defective.

P.C. board

is defective.

Keep indoor unit

away from thyristor

fluorescent light.

Avoid direct

sunlight.

Replace

P.C. board.

Replace

batteries.

Replace

remote controller.

Normal

operation

NOTE : After replacing batteries,

push the RESET button

with a tip of a pencil.

– 88 –

11-5-2. Wiring Failure (Interconnecting and Serial Signal Wire)

(1) Outdoor unit does not operate

1) Is the voltage between

and

$ %

of the indoor terminal block varied?

Confirm that transmission from indoor unit to outdoor unit is correctly performed based upon the following

diagram.

NOTE:

• Measurement should be performed 2 minutes and 30 seconds after starting of the operation.

• Be sure to prepare a diode for judgment.

Terminal block at indoor side

Red

S5277G or equivalent (G or J type)

(Diode with rated voltage of 400V

or more is acceptable.)

S5277G

White

Tester

Terminal block

Normal time

:Voltage swings between DC15 and 60V. ....................Inverter Assembly check (11-8-1)

Abnormal time : Voltage does not vary.

(2) Outdoor unit stops in a little while after operation started

<Check procedure> Select phenomena described below.

(1) The outdoor unit stops 10 to 20 minutes after operation started, and 10 minutes or more are required to

restart the unit.

Gas circulation amount is down.

Measure gas pressure.

Gas shortage

Gas leak

Pipe clogging

Thermo. operation of compressor

(2) If the unit stops once, it does not operate until the power will be turned on again.

To item of Outdoor unit does not operate.

(3) The outdoor unit stops 10 minutes to 1 hour after operation started, and an alarm is displayed.

(Discharge temp. error check code 03, 1E Sensor temp. error check code 02, 1C)

Gas leak

P.M.V. is defective.

Refer to the chart in 11-6.

Miswiring of connecting wires of indoor/outdoor units

Clogging of pipe and coming-off of TC sensor

– 89 –

11-6. Check Code 1C (Miswiring in indoor/outdoor units) and 1E

Disconnection of TGa

sensor. TGb sensor,

P.M.V sensor error

(Check dode 02,1C)

Miswiring in indoor/outdoor

units, gas leakage,

disconnection of TS/TC

sensors (Check code 02, 1C)

Discharge temp.

error, gas leakage

(Check code 03,1E)

Operation

Check Item

Considerable main cause

Is there miswiring of

connectiong cable in A/B rooms

of indoor/outdoor rooms?

Measues

YES

Item by symptom

Replace cables in A/B rooms

of outdoor terminal block

Valve drive check

Is coil of the pulse motor valve

(P.M.V.) correctly set?

Set it correctly.

YES

Is connecter of coil connected to inverter?

Are connections of A/B rooms correct?

YES

Is positioning sound of valve (sound hitting to stopper) heard from valve

when the air conditioner starts the operation after turning off power

of the air conditioner once?

Replace coil valve.

Set it correctly.

YES

Are temp. sensors of indoor/outdoor units correctly set to the holder?

NOTE :

The temperature sensors which are used to control pulse motor valve

include indoor heat exchanger sensor (TC), A room gas side temp. sensor

(TGa), B room gas side temp. sensor (TGb), and outdoor suction temp.

sensor (TS).

YES

Gas amount check and valve clogging check

Check them when operation is performed is only one of A or B room.

Remove TC sensor connector from the P.C. board in indoor unit.(Remove connector from the P.C. board.)

Operate the air conditioner in COOL mode by TEMP button (“Pi” sound is heard if keeping pushed for 10 seconds.).

The operation enters temporary operation mode which fixes opening degree of P.M.V. and No. of revolution of

compressor. Check condensation at outlet of P.M.V., and then check operating pressure from the service port.

Existence of condensation at outlet of P.M.V.

YES

Replace valve.

Add gas.

If there is condensation at outlet (1/4 inch=Ø6.35mm valve side),

the valve is clogged.

Check the operating pressure from service port, and add gas if pressure is low.

– 90 –

11-7. Trouble Diagnosis by Outdoor LED

For the outdoor unit, the self-diagnosis is possible by

five LEDs (Red).

• LEDs (Red) (D11 to D15) are provided on the sub-

control board under surface of the inverter, and as

shown below, they are checked from the wiring port

when removing the wiring cover.

(1) If a trouble occurs, LED (Red) goes on according

to the trouble as described in the table below.

D09 D10 D11 D12 D13

LED (Red)

(2) When two or more troubles occur, LEDs go on

cyclically.

(3) Usually, LEDs (Red) go off.

LED indication

Indoor alarm

code

Contents

D09 D10 D11 D12 D13

Normal running

None

IGBT short circuit, Compressor motor rear short

Trouble on position detecting circuit

Trouble on current detecting circuit

CONDENSOR PIPE TEMP. SENSOR(TE) fault

SUCTION PIPE TEMP. SENSOR(TS) fault

DISCHARGE PIPE TEMP. SENSOR(TD) fault

Trouble on outdoor fan

OUTDOOR TEMP. SENSOR(TO) fault

Trouble on compressor system

GAS SIDE PIPE TEMP. SENSOR a (TGa) fault

GAS SIDE PIPE TEMP. SENSOR b (TGb) fault

TGa, TGb sensor out of place, PMV fault

Communication trouble between MCU

Compressor lock

Trouble on discharge temp. Gas leakage

Compressor break down

: LED ON,

: LED OFF

– 91 –

11-7. Troubleshooting

11-7-1. How to Check Whether the Air Purifier is Good or Not

Turn off the power breaker once,

and turn on again after 10 seconds.

Does the OPERATION indicator flash?

To item “Power supply is not turned on”

YES

Turn off the power breaker and remove

CN34 (Micro switch connector).

Short-circuit between

and

of CN34 at PC side, and turn on the

power breaker after 10 seconds.

Is DC12V applied

between

(Red/DC12V) and

between

(+) and

(–)

(Brown/GND) of CN1 of the

high-voltage generator?

of CN33 of the main

P.C. board (MCC5020)?

YES

Replace the main P.C. board (MCC5020)

Replace micro-switch.

Is there conduction of

micro-switch connector under

OFF status of the micro-switch

(Front panel opened)?

YES

Micro-switch is stuck

Is there conduction of

micro-switch connector under

ON status of the micro-switch

(Front panel closed)?

• Conduction check of micro-switch

Micro-switch malfunction

Push the switch

YES

→ ON

Release the switch

→ OFF

1) Check operation while short-circuiting CN34 of the main P.C. board.

2) Perform air purifying operation by the remote controller.

• In this time, check that the remote controller is in status which is shortened by time on

the reactivation preventive timer and all display indicators go on for approx. 3 seconds

when a signal is received.

If time on the reactivation preventive timer is not shortened,

(

)

the high-voltage is not applied to electrode of the air purifier for approx. 1 hour.

• While the air purifier operates, check that the fan speed [AUTO] is not displayed.

(Because the power ON/OFF is controlled on the program)

Tester

3) Be sure not to touch the electric dust collector, ionizer, or ionized wire unit with the human body.

To item “Only indoor fan does not operate”

Replace the main P.C. board (MCC5020).

Does the indoor fan rotate?

YES

Does the PURE indicator (Blue) or

the FILTER indicator (Orange) go on?

YES

Is DC-5V to DC-10V

applied between

• How to check output of the air purifier

Does the PURE indicator

go off within 2 seconds after

it was ON, and does the FILTER

indicator (Orange) go on?

(Brown/Negative voltage)

and

(Brown/GND)

of CN33 of the main

P.C. board?

Collector

output

YES

Dry the electric

dust collector

and ionizer.

Are the electric dust

collector and ionizer dried?

(Electrode check)

GND

YES

Ionizer

output

Referring to the right figure, check the

Be sure not to

come to contact

to the gray part

or not to touch

the ionized

cables.

high-output voltage of the air filter unit.

(NOTE)

High-voltage

tester

Use an exclusive high voltage tester;

otherwise the tester may be broken.

YES

Is output of the ionizer

approx. 4.0 kV to 4.8 kV?

Is output of the collector

approx. 3.0 kV to 3.8 kV?

Refer to items, cleaning and check

for the electric dust collector/ionizer/

ionized wire units.

Replace the high-voltage generator.

When the ionized wire is

disconnected or when dirt is

YES

(

)

not cleaned even cleaned,

replace each unit.

Are the electric dust

collector/ionizer/ionized

wire units dirty?

Is an abnormal sound

(cracking noise) heard

from the electrode?

YES

No trouble

– 92 –

11-7-2. How to Check Whether the Minus Ion Generator is Good or Not

Turn off the power breaker once,

and turn on again after 10 seconds.

Does the OPERATION indicator flash?

YES

To item “Power supply is not turned on”

Turn off the power breaker and remove

CN34 (Micro switch connector).

Short-circuit between

and

of CN34 at PC side, and turn on the

power breaker after 10 seconds.

Is DC12V applied

between

(Red/DC12V) and

Replace the power P.C. board

(MCC5020) or the housing assembly.

(Brown/GND) of CN1 of the

high-voltage generator

in the air purifier?

YES

Is there conduction of

YES

micro-switch connector under

OFF status of the micro-switch

(Front panel opened)?

Micro-switch is stuck

Replace micro-switch.

Is there conduction of

micro-switch connector under

ON status of the micro-switch

(Front panel closed)?

• Conduction check of micro-switch

Micro-switch malfunction

YES

Push the switch

→ ON

Release the switch

→ OFF

1) Check operation while short-circuiting CN34 of the main P.C. board.

2) Perform air purifying operation by the remote controller.

• In this time, check that the remote controller is in status which is shortened by time on

the reactivation preventive timer and all display indicators go on for approx. 3 seconds

when a signal is received.

If time on the reactivation preventive timer is not shortened,

(

)

the high-voltage is not applied to electrode of the air purifier for approx. 1 hour.

• While the air purifier operates, check that the fan speed [AUTO] is not displayed.

(Because the power ON/OFF is controlled on the program)

Tester

3) Be sure not to touch the electrode with the human body.

To item “Only indoor fan does not operate”

Replace the main P.C. board (MCC5020).

Does the indoor fan rotate?

YES

Does the PURE indicator (Blue) or

the FILTER indicator (Orange) go on?

YES

Does the PURE indicator

go off within 2 seconds after

it was ON, and does the FILTER

indicator (Orange) go on?

YES

To item “How to check whether

the air purifier is good or not”

• How to check output of minus ion

Referring to the right figure, check the

high-voltage output of the air ionizer.

In this time, peel the thermal insulator, and attach

it to the original position after check operation.

high-voltage

unit

NOTE :

Use an exclusive high voltage tester; otherwise

the tester may be broken.

YES

Does the electrode

output approx. –6kV?

No trouble

Electrode

Replace the

high-voltage generator

GND

High-voltage tester

– 93 –

11-8. How to Diagnose Trouble in Outdoor Unit

11-8-1. Summarized Inner Diagnosis of Inverter Assembly

Table 11-8-1

Diagnosis/Process flowchart

Item

Contents

Summary

Preparation Turn “OFF” the power supply

breaker, and remove 3P

Remove

connector of

compressor.

connector which connects

inverter and compressor.

If fuse was blown, be sure

to check the electrolytic

capacitor and diode block.

(DB01)

Check

• Check whether 25A fuse on

the control board assembly

is blown or not. (F01)

Check 25A fuse

(Part No.F01).

Replace fuse.

• Connect discharge

resistance (approx.

100Ω40W) or soldering

iron (plug) between +, –

terminals of the electro-

lytic capacitor (760µF) of

C14 (with printed CAU-

TION HIGH VOLTAGE) on

P.C. board.

Check

electrolytic

capacitor, diode

block (DB01),

etc.

Discharging position

(Discharging period

10 seconds or more)

Plug of

soldering

iron

Check

terminal voltage

of electrolytic

capacitor.

Check

electrolytic

capacitor, diode

(DB01),

etc.

Does outdoor

fan rotate?

Operation

Turn on the power breaker,

and operate the air condi-

tioner in COOL mode by time

shortening.

YES

OK if 760µF →

DC280 to 380V

Measure-

ment

Measure terminal voltage of

the electrolytic capacity.

Remove CN300 while

pushing the part indicated

by an arrow because

CN300 is a connector with

lock.

760µF:400WV x 3

After operation, turn off the

power breaker after 2

Remove connector

CN300 of outdoor fan

motor, and using a

tester, check resistance

value between every

phases at motor side.

Check

Stop

minutes 20 seconds passed,

and discharge the electrolytic

capacitor by soldering iron.

Check voltage between motor

phases.

Check

Measure-

ment

• Is not winding between

Replace

outdoor

fan motor.

, or

opened

→ Resistance between

phases should be

$$% #%

or short-circuited?

approx. 55 to 77Ω

• Is not frame grounded with

, or

→ Should be 10MΩ or

#$ %

more.

– 94 –

Diagnosis/Process flowchart

Item

Contents

Summary

Check

Check winding resistance

between phases of compres-

sor, and resistance between

outdoor frames by using a

tester.

• Is not grounded.

→ OK if 10MΩ or more

Replace control

board assembly.

• Is not short-circuited

between windings.



→ OK if 0.51Ω → 0.57Ω

(Check by a digital tester.)





• Winding is not opened.

Check

compressor

winding

resistance.

Operation

Remove connector CN300 of

the outdoor fan motor, turn

on the power supply breaker,

and perform the operation.

(Stops though activation is

prompted.)

Replace

control board.

Replace

compressor.

Check operation within 2

minutes 20 seconds after

activation stopped.

(2) Inspection procedures

11-9. How to Check Simply the Main

Parts

1) When a P.C. board is judged to be defective,

check for disconnection, burning, or discolora-

tion of the copper foil pattern on this P.C.

board.

11-9-1. How to Check the P.C. Board

(Indoor Unit)

2) The P.C. board consists of the following 2

parts

(1) Operating precautions

1) When removing the front panel or the P.C.

board, be sure to shut off the power supply

breaker.

a. Main P.C. board part :

DC power supply circuit (5V, 12V, 15V),

Indoor fan motor control circuit, CPU and

peripheral circuits, buzzer, and Driving

circuit of louver.

2) When removing the P.C. board, hold the edge

of the P.C. board and do not apply force to the

parts.

b. Indication unit of infrared ray receiving

Infrared ray receiving circuit, LED :

3) When connecting or disconnecting the

connectors on the P.C. board, hold the whole

housing. Do not pull at the lead wire.

To check defect of the P.C. board, follow

the procedure described below.

– 95 –

(3) Check procedures

Table 11-9-1

Check points

No.

Procedure

Causes

Turn off the power supply breaker

and remove the P.C. board

Check whether or not the fuse

(F01) is blown.

Impulse voltage was applied or the

indoor fan motor short-circuited.

assembly from electronic parts

base. Remove the connecting

cables from the terminal block.

Remove the connector of the

motor and turn on the power

supply breaker. If OPERATION

indicator flashes (once per

second), it is not necessary to

check steps (1 to 3) in the right

next column.

Check power supply voltage :

1. Between No. 1 and No. 3 of CN23

(AC 220–240V)

2. Between + and – of C03

(DC 310–340V)

3. Between – of C10 and output

side of IC08 (DC 15V)

4. Between 12V and GND

5. Between 5V and GND

1. The terminal block or the crossover

cable is connected wrongly.

2. The capacitor (C01), line filter

(L01), resistor (R05), or the diode

(DB01) is defective.

3. IC01, IC08 and T01 are defective.

4. IC01, IC08 and T01 are defective.

5. IC01, IC08, IC07 and T01 are

defective.

Push [START/STOP] button once Check power supply voltage :

IC03 and IC04 are defective.

to start the unit. (Do not set the

mode to On-Timer operation.)

1. Between CN21 and

No. 1 of CN23 (DC 15–60V)

Shorten the restart delay timer

and start unit.

Check whether or not all indicators The indicators are defective or the

housing assembly (CN13) is defective.

(OPERATION, TIMER, FILTER,

Plasma) are lit for 3 seconds and

they return to normal 3 seconds

later.

Push [START/STOP] button once 1. Check whether or not the

1. The temperature of the indoor heat

exchanger is extremely low.

to start the unit,

compressor operates.

2. The connection of the heat ex-

changer sensor is loose.

(The connector is disconnected.)

(CN01)

3. The heat exchanger sensor and the

P.C. board are defective.

• Shorten the restart delay timer.

• Set the operation mode to

COOL.

• Set the fan speed level to

AUTO.

• Set the preset temperature

much lower than the room

temperature. (The unit (com-

pressor) operates continuously

in the above condition.)

2. Check whether or not the

OPERATION indicator flashes.

(Refer to Table 11-4-1.)

4. The main P.C. board is defective.

If the above condition (No. 5) still 1. Check whether or not the

1. The temperature of the indoor heat

exchanger is extremely high.

2. The connection of the heat ex-

changer sensor short-circuited.

(CN01)

continues, start the unit in the

following condition.

compressor operates.

2. Check whether or not the

OPERATION indicator flashes.

• Set the operation mode to

HEAT.

• Set the preset temperature

much higher than room

temperature.

3. The heat exchanger sensor and the

P.C. board are defective.

(Refer to Table 11-4-1.)

4. The main P.C. board is defective

1. The indoor fan motor is defective.

(Protected operation of P.C. board.)

2. The P.C. board is defective.

3. The connection of the motor

connector is loose.

Connect the motor connector to

the motor and turn on the power

supply.

Start the unit the following

condition.

• Set the fan speed level to

HIGH. (The unit (compressor)

operates continuously in the

above condition in No. 5.)

1. Check it is impossible to detect

the voltage (DC 15V) between 3

and 4 of the motor terminals.

2. The motor does not operate or

the fan motor does not rotate

with high speed.

(But it is possible to receive the

signal from the remote controller.)

3. The motor rotates but vibrates

strongly.

– 96 –

11-9-2. P.C. Board Layout

GND

+12V

+5V

[1] Sensor characteristic table

100

TD : Discharge temp. sensor

TA : Room temp. sensor

TC : Heat exchanger temp. sensor

TO : Outdoor temp. sensor

TE : Outdoor heat exchanger temp. sensor

TS : Suction temp. sensor

TGa : A room Gas side temp. sonsor

TGb : B room Gas side temp. sensor

TA, TC, TO, TGa, TGb, TE, TS

40 50

Temperature (˚C)

– 97 –

11-9-3. Indoor Unit (Other Parts)

No.

Part name

Checking procedure

Room temp. (TA) sensor

Heat exchanger (TC) sensor

Disconnect the connector and measure the resistance value with tester.

(Normal temp.)

Temperature

10°C

20°C

25°C

30°C

40°C

Sensor

TA, TC (kΩ)

20.7

12.6

10.0

7.9

4.5

Remote controller

Refer to 11-5-1. (5).

Louver motor

MP24GA

Measure the resistance value of each winding coil by using the tester.

(Under normal temp. 25°C)

Position

Resistance value

White

Yellow

1 to 2

1 to 3

1 to 4

1 to 5

380 ± 40 Ω

Indoor fan motor

Refer to 11-5-1. (3) and (4).

11-9-4. Outdoor Unit

No.

Part name

Checking procedure

Compressor

(Model :DA111A1F-20F)

Measure the resistance value of each winding by using the tester.

Red

Position

Red - White

White - Black

Black- Red

Resistance value

0.88 to 0.98Ω

White

Black

Under 20°C

Compressor

(Model :DA130A1F-25F)

Measure the resistance value of each winding by using the tester.

Red

Position

Red - White

White - Black

Black - Red

Resistance value

0.69 to 0.77Ω

White

Black

Under 20°C

Outdoor fan motor

(Model : ICF-140-43-4)

Measure the resistance value of each winding by using the tester.

Red

Position

Red - White

White - Black

Black- Red

Resistance value

17 to 25kΩ

White

Black

Compressor thermo. Bimetal

type (Model : US-

Check conduction by using the tester.

622KXTMQO-SS)

– 98 –

No.

Part name

Checking procedure

Outdoor temperature sensor

(TO), discharge temperature

sensor (TD), suction

temperature sensor (TS),

outdoor heat exchanger

temperature sensor (TE),

A room gas side temperature

sensor (TGa), B room gas

side temerature sensor (TGb)

Disconnect the connector, and measure resistance value with the

tester. (Normal temperature)

Temperature

10°C

20°C

30°C

40°C

50°C

Sensor

TD (kΩ)

100

TGa, TGb (Cooling only)

20.6

12.6

10.0

5.1

3.4

TO, TE, TS (kΩ)

TGa, TGb (Heat Pump) (kΩ)

20.5

12.5

10.0

5.3

3.6

4-way valve coil

(Model :VHV)

Measure the resistance value of winding by using the tester.

Resistance value

1435±144 Ω

Under 20°C

Electronic control valve coil

(Model : CAM-MD12TF-1)

Measure the resistance value of winding by using the tester.

Position

Red - White

Resistance value

COM

42 to 50kΩ

White - Orange

Brown- Yellow

Brown- Blue

Y BR BL

COM

Under 20°C

11-9-5. Checking Method for Each Part

No.

Part name

Checking procedure

Electrolytic capacitor

(For boost, smoothing)

1. Turn OFF the power supply breaker.

2. Discharge all three capacitors completely.

3. Check that safety valve at the bottom of capacitor is not broken.

4. Check that vessel is not swollen or exploded.

5. Check that electrolytic liquid does not blow off.

6. Check that the normal charging characteristics are shown in continuity test

by the tester.

C12 C13 C14

Case that product is good

Pointer swings once, and returns

slowly. When performing test

once again under another polarity,

MCC-5009

Soldered

the pointer should return.

surface

C12, C13, C14 → 760µF/400V

1. Turn OFF the power supply breaker.

Diode block

2. Completely discharge the four electrolytic capacitors.

3. Remove the diode block from the PCB (which is soldered in place).

4. Use a multimeter with a pointer to test the continuity, and check that the

diode block has the proper rectification characteristics.

10 to 20 Ω

Tester rod

Resistance value

in good product

when the

multimeter

probe is

–

~ ~

–

reversed

∞

1 2 3 4

–

(DBO1)

–

– 99 –

11-10. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad

1. Symptom

• Outdoor fan motor does not rotate.

• Outdoor fan motor stops within several tens seconds though it started rotating.

• Outdoor fan motor rotates or does not rotate according to the position where the fan stopped, etc.

Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error”

2. Cause

The following causes are considered when the outdoor fan motor does not normally rotate.

1) Mechanical lock of the outdoor fan motor

2) Winding failure of the outdoor fan motor

3) Position-detect circuit failure inside of the outdoor fan motor

4) Motor drive circuit failure of the outdoor P.C. board

3. How to simply judge whether outdoor fan motor is good or bad

Turn OFF the breaker.

Disconnect two connectors (CN300)

of the outdoor fan motor from the outdoor P.C. board.

Does the fan rotate without trouble

when rotating it with hands?

YES

CN300

If the resistance value between

1 (Red lead)

2 (White lead)

3 (Black lead)

– 2 (White lead)

– 3 (Black lead)

– 1 (Red lead)

of the connector

(CN300 : Motor winding)

is 17 to 25Ω, it is normal.

YES

Fan motor is normal.

Fan motor error

(Outdoor P.C. board error)

NOTE :

However, GND circuit error inside of the motor may be accepted in some cases when the above check is per-

formed.

When the fan motor does not become normal even if P.C. board is replaced, replace the outdoor fan motor.

– 100 –

12. HOW TO REPLACE THE MAIN PARTS

WARNING

• Since high voltages pass through the electrical parts, turn off the power without fail before proceeding with the

repairs.

Electric shocks may occur if the power plug is not disconnected.

• After the repairs have been completed (after the front panel and cabinet have been installed), perform a test

run, and check for smoking, unusual sounds and other abnormalities.

If this check is omitted, a fire and/or electric shocks may occur.

Before proceeding with the test run, install the front panel and cabinet.

• Ensure that the following steps are taken when doing repairs on the refrigerating cycle.

(1) Do not allow any naked flames in the surrounding area. If a gas stove or other appliance is being used,

extinguish the flames before proceeding. If the flames are not extinguished, they may ignite any oil mixed

with the refrigerant gas.

(2) Do not use welding equipment in an airtight room. Carbon monoxide poisoning may result if the room is not

properly ventilated.

(3) Do not bring welding equipment near flammable objects.

Flames from the equipment may cause the flammable objects to catch fire.

• If keeping the power on is absolutely unavoidable while doing a job such as inspecting the circuitry,

wear rubber gloves to avoid contact with the live parts.

Electric shocks may be received if the live parts are touched.

High-voltage circuits are contained inside this unit. Proceed very carefully when conducting checks since

directly touching the parts on the control circuit board may result in electric shocks.

12-1. Indoor Unit

No.

Part name

Procedures

Remarks

Front panel

1) Stop operation of the air conditioner and turn off

its main power supply.

2) Open the air inlet grille, push the arm toward the

outside, and remove the grille.

3) Remove the left and right air filters, and remove

the electric dust collector.

– 101 –

No.

Part name

Procedures

Remarks

Front panel

4 )Push “

” part under the front panel and

remove hooks of the front panel from the

installation plate.

Pull here

Installation plate

Front panel

Push here

Push

Press with your thumb

5) Remove the front panel fixing screws (2 pcs.).

6) Push the electric parts box with the right thumb

while pulling the both sides of the front panel

toward you.

Pull here

1) Push three

Electric dust

collector

center positions

and two lower

center positions

of the air outlet,

and then hang

the hanging

Electric dust

collector

Holder

hooks (4 pcs.)

at the top side

of the front

panel to the rear

plate.

Protrusion

2) Insert the

electric dust

collector and

left and right air filters.

Push in the electric dust collector until the

protrusions on both sides are completely

inserted into the holders. If installation is

incomplete, the FILTER indicator (orange) may

light.

3) Tighten two screws.

• Incomplete hanging or incomplete pushing

may cause a dewdrops or generation of a

fluttering sound.

– 102 –

No.

Part name

Procedures

Remarks

High voltage

generator

1) Follow to the procedure in the item !.

2) Remove the drain guide.

Connector

Drain

guide

Air ionizer

3) To remove the air ionizer from the back body,

pull it toward you while pressing down on its left

and right claws. Disconnect the two leads

(black) connected to the air ionizer from where

they are fitted into the other components.

(Caution: do not remove the Faston.)

Push the

claw here

Push the

claw here

4) Disconnect the connectors of the high-voltage

generator, and disconnect the four leads from

where they are fitted into the other components.

Pull here

5) Remove the fixing screw which secures the high

voltage generator, and remove the high voltage

generator from the evaporator.

Screw

– 103 –

No.

Part name

Procedures

Remarks

High voltage

generator

1) Insert the high voltage generator straight into the

evaporator, and secure it using the fixing screw.

Check whether

the leads have

been completely

inserted.

2) Pass the leads of the high voltage generator

through the area designated and insert them into

its connectors.

Claw

3) Attach the air ionizer to the back body, and pass

the two leads (black) through the area desig-

nated on the electric parts box assembly.

Claw

4) Attach the drain guide.

– 104 –

No.

Part name

Procedures

Remarks

Electric parts 1) Follow the procedure up to 4) in " above.

Lead wire

cover

box assembly

2) Remove screw of earth lead attached to the end

plate of the evaporator.

3) Remove the lead wire cover, and remove

connector (5P) for the fan motor and connector

(5P) for the louver motor from the electric parts

box assembly.

4) Pull out TC sensor from sensor holder of the

evaporator.

TC sensor

Fan motor

connector

Louver moter

connector

Screw

Fixing screw

Make absolutely sure that

the leads form a loop

5) Disengage the two claws at the top of the

display unit. (They can be easily disengaged by

pressing the drain pan above the claws and at

the same time pulling the display unit toward

you.)

Push the

drain pan

6) Remove the fixing screw that secures the

electric parts box assembly, and remove the

assembly.

Pull the display

unit toward you

1) Hook the top part of the electric parts box

assembly onto the claws on the back body, and

secure it using the fixing screw. Now attach the

display unit. Connect the connectors for the fan

motor and louver motor.

2) Secure the grounding wire using the fixing screw.

Insert the TC sensor into the sensor holder.

* Be absolutely sure to loop the grounding wire

and TC sensor leads once at the bottom.

– 105 –

No.

Part name

Procedures

Remarks

Horizontal

louver

1) Remove shaft of the horizontal louver

from the back body. (First remove the

left shaft, and then remove other shafts

while sliding the horizontal louver

leftward.)

Slide the horizontal

louver leftward

Evaporator

(Heat

exchanger)

1) Follow to the procedure in the item #.

2) Remove the pipe holder from the rear side of the

main unit.

Pipe holder

3) Remove two fixing screws at the left side of the

end plate of the heat exchanger.

Disengage the claw

Screw

4) Remove the heat exchanger fixing holder by

Screw

removing the two fixing screws used to secure

it.

Heat exchanger

fixing holder

Screw

5) Remove right side of the end plate from two

fixing ribs while sliding slightly the heat ex-

changer rightward.

Hanged part

– 106 –

No.

Part name

Procedures

Remarks

Bearing

1) Follow to the procedure in the items !.

2) Remove the two fixing screws used to secure

the left edge panel of the heat exchanger, and

remove the two screws used to secure the

bearing base.

Screw

Bearing

base

Screw

3) Raise the left side of the heat exchanger

slightly, and remove the bearing base.

Raise the

left side

• If the bearing is out from the housing, push it into

the specified position and then incorporate it in

the main body.

• After assembling the bearing base, check that it

is fitted into the stepped part of the drain pipe.

Remove in this direction

Bearing base

Bearing

Drain pipe

Bearing base

– 107 –

No.

Part name

Procedures

Remarks

Fan motor

1) Follow to the procedure in the item #.

2) Loosen the set screw of the cross flow fan.

3) Remove two fixing screws of the motor band

(Right), and then remove the motor band (Right).

4) Pull the fan motor outward.

In assembling work, install the fan motor as

follows.

Set screw

• When assembling the fan motor, the fan motor

must be installed in such a way that the fan

motor leads will be taken out is positioned at the

bottom front.

• After assembling the two hooking claws of the

motor band (right) into the main body, position the

fan motor, insert it, and then secure the motor

band (right) using the two fixing screws.

Secure using the

fixing screw

Screw

Motor band (Right)

Screw

Secure using the

fixing screw

Fan motor leads

Cross flow

fan

1) Follow to the procedure in the item &.

2) Remove the heat exchanger fixing holder by

(

removing the two fixing screws used to secure

it.

Raise the

left side

3) Loosen the set screw of the cross flow fan.

4) Lift the left side of the heat exchanger, and pull

out the cross flow fan.

Pull out here

– 108 –

No.

Part name

Procedures

Remarks

Cross flow

fan

(

a) At assembling work of the bearing base, check

that the drain pipe is surely incorporated

in the back body.

(Otherwise, water leak is caused.)

Drain pipe

Bearing base

b) To incorporate the fan motor, remove the fan

motor rubber (at shaft core side), incorporate the

motor into the position in the following figure,

and then install the fan motor.

• Install the cross flow fan so that the right end

of the 1st joint from the right of the cross flow

fan is set keeping 70.5mm from wall of rear

plate of the main unit.

• Holding the set screw, install the cross flow

fan so that U-groove of the fan motor comes to

the mounting hole of the set screw.

Joint

U groove

70.5mm

• Perform positioning of the fan motor as fol-

lows:

• When assembling the fan motor, the fan motor

must be installed in such a way that the fan

motor leads will be taken out is positioned at

the bottom front.

• After assembling the two hooking claws of the

motor band (right) into the main body, position

the fan motor, insert it, and then secure the

motor band (right) using the two fixing screws.

– 109 –

12-2. Microcomputer

No.

Part name

Procedure

Remarks

Common procedure

1) Turn the power supply off to stop the

operation of air-conditioner.

Replace terminal block,

microcomputer assembly and

the P.C. board assembly.

2) Remove the front panel.

• Remove the 2 fixing screws.

3) Remove the electrical part base.

<P.C. board layout>

R05

L01 C01 CN23 FUSE R04 R01

CN10

DB01

C03

T01

IC01

C20 IC03

J04

– 110 –

12-3. Outdoor Unit

No.

Part name

Procedures

Remarks

Common

procedure

1. Detachment

NOTE :

Upper cabinet

Water proof cover

Wear gloves for this job.

Otherwise, you may injure your hands on

the parts, etc.

1) Stop operation of the air conditioner, and turn off

the main switch of the breaker for air condi-

tioner.

2) Remove the valve cover. (ST1TØ4 x 8l 1 pc.)

• After removing screw, remove the valve cover

pulling it downward.

3) Remove wiring cover (ST1TØ4 x 8l 2 pcs.), and

Valve cover

then remove connecting cable.

4) Remove the upper cabinet.

(ST1TØ4 x 8l 5 pcs.)

• After removing screws, remove the upper

cabinet pulling it upward.

2. Attachment

Insert the bent part into the rear

panel of the inverter

Bring into

contact

1) Attach the water-proof cover.

against

these parts

NOTE :

The water-proof cover must be attached

without fail in order to prevent rain water,

etc. from entering inside the indoor unit.

2) Attach the upper cabinet.

Align the stitch

Bend downward,

line with the top and align with

(ST1TØ4 x 8l 5 pcs.)

edge of the

front cabinet

the inside surface of

the front cabinet

3) Perform cabling of connecting cable, and attach

the wiring cover.

How to mount the water-proof cover

• Place the wiring cover over the opening used

to work on the connecting wires of the side

cabinet, and secure it using the two fixing

screws (ST1TØ4 x 8l 2 pcs.). At this point,

the top cushion of the wiring cover must be on

the inside of the opening.

4) Attach the valve cover. (ST1TØ4 x 8l 1 pc.)

• Insert the upper part into the square hole of

the side cabinet, set hook claw of the valve

cover to square holes (at three positions) of

the main unit, and attach it pushing upward.

– 111 –

No.

Part name

Procedures

Remarks

Front cabinet

1. Detachment

1) Perform step 1 in 1.

2) Remove the fixing screws (ST1TØ4 x 8l 2 pcs.)

used to secure the front cabinet and inverter

cover, the screws (ST1TØ4 x 8l 3 pcs.) used to

secure the front cabinet at the bottom plate, and

the fixing screws (ST1TØ4 x 8l 2 pcs.) used to

secure the motor base.

• The front cabinet is fitted into the side cabinet

(left) at the front left side so pull up the top of

the front cabinet to remove it.

Front cabinet

2. Attachment

1) Insert the claw on the front left side into the side

cabinet (left).

2) Hook the bottom part of the front right side onto

the concave section of the bottom plate. Insert

the claw of the side cabinet (right) into the

square hole in the front cabinet.

3) Return the screws that were removed above to

their original positions, and attach them.

Claw

Square hole

Concave section

– 112 –

No. Part name

Procedure

1) Perform work of item 1 in

Remarks

Inverter

assembly

Inverter cover

2) Remove screw (ST1TØ4 x 8l 2 pcs.) of the upper

P. C. board

(Soldered surface)

part of the front cabinet.

• If removing the inverter cover in this condition,

P.C. board can be checked.

• If there is no space above the unit, perform work

of 1 in

Be careful to check the inverter because

high-voltage circuit is incorporated in it.

Plug of

soldering

iron

Discharging position

(Discharging period

10 seconds or more)

3) Perform discharging by connecting

by discharging resistance (approx. 100Ω40W) or

plug of soldering iron to terminals a of the

polarity

C14 (printed “CAUTION HIGH VOLTAGE” is at-

tached.) electrolytic capacitor (760µF) on P.C.

board.

Be careful to discharge the capacitor be-

cause the electrolytic capacitor cannot

naturally discharge and voltage remains

according to trouble type in some cases.

A screw

(STIT-4X8MSZN)

NOTE :

This capacitor is one with mass capacity.

Therefore, it is dangerous that a large spark

generates if short-circuiting between

polarity with screwdriver, etc. for discharging.

4) Remove screw (ST1TØ4 x 8l 2 pcs.) fixing the

main body and the inverter box.

Put the compressor Put each leads

leads and the comp. through the

5) Remove the front cabinet by performing step 1 in

", and remove the fixing screws (ST1TØ4 x 8l )

for securing the main body and inverter box.

thermo leads

slit.

through the hole.

6) Remove various lead wires from the holder at

upper part of the inverter box.

The connector is

one with lock,

so remove it while

pushing the part

indicated by an

arrow.

7) Pull the inverter box upward.

8) Disconnect connectors of various lead wires.

Requirement :

As each connector has a lock mechanism,

avoid to remove the connector by holding

the lead wire, but by holding the connector.

Be sure to remove the connector

by holding the connector, not by

pulling the lead wire.

– 113 –

No.

Part name

Procedures

Remarks

Control board

assembly

1) Disconnect the leads and connectors connected to

the other parts from the control board assembly.

CN701

CN300

1) Leads

• 3 leads (black, white, orange) connected to

terminal block.

• Lead connected to compressor : Disconnect

the connector (3P).

• Lead connected to reactor : Disconnect the

two connectors (2P).

Main P.C. board

Ty lap tie

2) Connectors (x8)

Connector

Two claws

Main P.C. board

CN300 : Outdoor fan motor (3P: white)*

(See Note)

CN701 : 4-way valve (2P: yellow)*

Sub P.C. board

CN01 :TE sensor (2P: white)*

CN11 : PMW (6P: white)

CN12 : PMV (6P: red)

CN04 :TS sensor (3P: white)*

CN02 :TD sensor (3P: white)*

CN03 :TO sensor (2P: white)

CN05 :TGa sensor (3P: yellow)

CN14 :TGb sensor (3P: red)

CN10 : Case thermo (2P: blue)*

CN07 : Lead for communication

CN13 : Lead for AC power supply

Sub PCB

base

Hook

Two screws

(PT2F-4X10MS-ZN)

CN14

CN01

CN02

CN03

CN07

CN05

CN04

CN10

Note :

CN12

These connectors have a disconnect preven-

tion mechanism: as such, the lock on their

housing must be released before they are

disconnected.

CN11

CN13

2) Remove the control board assembly from the

P.C. board base. (Remove the heat sink and

control board assembly while keeping them

screwed together.)

Sub P.C. board

CN300, CN701, CN600 and

CN603 are connectors with

locking mechanisms: as such,

to disconnect them, they must

be pressed in the direction of the

arrow while pulling them out.

Note:

Disengage the four claws of the P.C. board

base, hold the heat sink, and lift to remove it.

3) Remove the two fixing screws used to secure

the heat sink and control board assembly.

4) Mount the new control board assembly.

Note :

When mounting the new control board assem-

bly, ensure that the P.C. board is inserted

properly into the P.C. board support groove.

5) Disconnect the connectors.

P.C. board base

P.C. board

6) Remove the two screws (PT2F-4X10MS-ZN),

then remove the Sub P.C. board base while

disengaging the claws from the square holes.

7) Disengage the two claws of the Sub P.C. board

base and remove the Sub P.C. board.

– 114 –

No.

Part name

Procedures

1. Side cabinet (right)

Remarks

Side cabinet

1) Perform step 1 in " and all the steps in #.

2) Remove the fixing screw (ST1TØ4 x 8l 5 pcs.)

used for securing the side cabinet to the bottom

plate and valve fixing plate.

2. Side cabinet (left)

Hook the claw onto

the bottom plate here.

1) Perform step 1 in ".

2) Remove the fixing screw (ST1TØ4 x 8l 1 pcs.)

used to secure the side cabinet (left) onto the

heat exchanger.

3) Remove the fixing screw (ST1TØ4 x 8l 2 pc.)

used for securing the side cabinet to the bottom

plate and heat exchanger.

The back body section is hooked

onto the bottom plate here.

Detail A

Detail B

Detail C

– 115 –

No.

Part name

Procedures

Remarks

Fan motor

1) Perform work of item 1 of ! and ".

2) Remove the flange nut fixing the fan motor and

the propeller.

Propeller fan

Fan motor

• Flange nut is loosened by turning clockwise.

(To tighten the flange nut, turn counterclock-

wise.)

3) Remove the propeller fan.

4) Disconnect the connector for fan motor from the

inverter.

5) Remove the fixing screws (2 pc.) holding by

hands so that the fan motor does not fall.

Flange nut

* Precautions when assembling the fan motor

Tighten the flange nut using a tightening torque

of 4.9 N•m.

Compressor

1) Perform work of item 1 of

2) Extract refrigerant gas.

and

" # % $

3) Remove the partition board.

(ST1TØ4 x 8l 3 pcs.)

4) Remove the sound-insulation material.

5) Remove terminal cover of the compressor, and

disconnect lead wire of the compressor and the

comp. thermo assembly from the terminal.

Partition

board

Compressor

6) Remove pipe connected to the compressor with

a burner.

Valve

fixing

plate

• Take care to keep the 4-way valve away from

naked flames. (Otherwise, it may malfunc-

tion.)

7) Remove the fixing screw of the bottom plate and

heat exchanger. (ST1TØ4 x 8l 1 pc.)

8) Remove the fixing screw of the bottom plate and

valve fixing plate.

(ST1TØ4 x 8l 1 pc.)

9) Pull upward the refrigeration cycle.

10) Remove BOLT (3 pcs.) fixing the compressor

to the bottom plate.

* Precautions when assembling the compressor

Tighten the compressor bolts using a tighten-

ing torque of 4.9 N•m.

(

Reactor

1) Perform work of item 1 of ", and

2) Remove screws fixing the reactor.

(ST1TØ4 x 8l 4 pcs.)

Reactors

– 116 –

No.

Part name

Procedures

Remarks

Electronic

expansion

valve coil

1. Detachment

)

1) Perform step 1 in ", all the steps in # and 1 in

Coil

anti-turn

lock

2) Remove the coil by pulling it up from the elec-

tronic control valve body.

Coil anti-turn

lock position

2. Attachment

1) When assembling the coil into the valve body,

ensure that the coil anti-turn lock is installed

properly in the pipe.

Coil inserting

position

When handling the parts, do not pull the leads.

When removing the coil from the valve body, use

your hand to secure the body in order to prevent

the pipe from being bent out of shape.

Fan guard

1. Detachment

Minus screwdriver

Hooking claw

1) Perform work of item 1 of

2) Remove the front cabinet, and put it down so

that fan guard side directs downward.

Perform work on a corrugated cardboard,

cloth, etc. to prevent flaw to the product.

3) Remove the hooking claws by pushing minus

screwdriver according to the arrow mark in the

right figure, and remove the fan guard.

2. Attachment

1) Insert claws of the fan guard in the holes of the

front cabinet. Push the hooking claws (9 posi-

tions) by hands and fix the claws.

All the attaching works have completed.

Check that all the hooking claws are fixed

to the specified positions.

– 117 –

No.

Part name

Procedures

Remarks

TE sensor

(outdoor heat

exchanging

temperature

sensor)

• Attachment

With the sensor leads pointing in the direction

shown in the figure, install the sensor onto the

straight pipe part of the condenser output pipe.

Detail A

Arrow E

Detail C for M14EAV-E,

M14EACV-E

Detail C for M18EAV-E,

M18EACV-E

Detail B

Detail C

Detail D

TS sensor

(suction pipe

temperature

sensor)

• Attachment

• Shown in the above figure is

the model M14EAV-E.

With its leads pointing down-

ward, point the sensor in the

direction of the packed valve,

and install it onto the straight

pipe part of the suction pipe.

• The sensor mounting positions

in the model M18EAV-E are all

the same with the sole excep-

tion of the TE sensor. Refer to

the figure shown on the left.

Detail B

Detail A

Arrow D

CAUTION

During the installation work

(and on its completion), take

care not to damage the

coverings of the sensor

leads on the edges of the

metal plates or other parts.

It is dangerous for these

coverings to be damaged

since damage may cause

electric shocks and/or a fire.

TD sensor

(discharge

pipe

temperature

sensor)

• Attachment

With its leads pointing down-

ward, install the sensor facing

downward onto the vertical

straight pipe part of the

discharge pipe.

TO sensor

(outside air

temperature

sensor)

• Attachment

CAUTION

Insert the outdoor air tempera-

ture sensor into the holder, and

install the holder onto the heat

exchanger.

After replacing the parts,

check whether the positions

where the sensors were

installed are the proper

positions as instructed. The

product will not be controlled

properly and trouble will

result if the sensors have not

been installed in their proper

positions.

TGa/TGb

sensor

• Attachment

With its leads pointing down-

ward, point the sensor in the

direction of the front cabinet,

and install the sensor onto the

straight pipe part of gas side

pipe. Match the sensor protec-

tive tube colors with the pipe

marking colors and install the

(Gas side

pipe

temperature

sensor)

Detail E

sensors. TGa is yellow, and TGb is red.

– 118 –

No.

Part name

Procedure

Remarks

Replacement of

temperature

sensor for

1) Cut the sensor 100 mm longer than old one.

2) Cut the protective tube after pulling out it

(200 mm).

Cutting here

100

Thermal

sensor part

Connector

servicing only

3) Move the protective tube toward the thermal

sensor side and tear the tip of lead wire in

two then strip the covering part.

Common service

parts of sensor

TO, TS, TE, TD,

TGa, TGb

Cutting here

200

4) Pass the stripped part through the thermal

constringent tube.

5) Cut the old sensor 100 mm length on the

connector side, and recycle that connector.

Thermal

constringent tube

6) Tear the lead wire in two on the connector

side and strip the covering part.

Cutting here

100

7) Twist the leads on the connector and sensor

sides, and solder them.

8) Move the thermal constringent tubes toward

the soldered parts and heat them with the

dryer and constring them.

Soldered part

9) Wind the attached color tape round the both

terminals of the protective tube when colored

protective tube is used.

10) Fix the sensor again.

Dryer

NOTES :

1) Store the joint part of the sensor and the

connector in the electric parts box.

Winding the color tape

2) Never joint them near the thermal sensor

part. Otherwise it would cause insulation

inferiority because of dew drops.

3) When replacing the sensor using the colored

protective tube, wind the color tape matching

the color of that tube.

Parts name

Q'ty

Remarks

Length : 3m

For spare

These are parts

for servicing

sensors.

Sensor

Sensor Spring (A)

Sensor Spring (B)

Thermal constringent tube

Color tape

Please check

that the

accessries

shown in the right

table are packed.

For spare

Including one spare

9 colors

Terminal

– 119 –

Outdoor unit

main PCB (MCC-5009)

– 120 –

Outdoor unit

Sub PCB (MCC-5009)

– 121 –

13. EXPLODED VIEWS AND PARTS LIST

13-1. Indoor Unit (1)

234

240

238

248 235

247

217

209

214

225

226

213

216

236

230

212

223

215

211

201

203

222

224

221

210

218

219

246

207

227

206

205

228

202

239

229

245

204

232

233

Location No.

201

Part No.

43005611

Description

Location No.

223

Part No.

Description

43049674

43047331

43044788

43044789

43039324

SPRING, SUCTION (*1)

PIPE, DELIVERY

PANEL ASS’Y, FRONT

GRILLE, AIR INLET

PLATE, FIX

224

202

203

204

205

206

207

209

210

43005610

4301V052

43080512

43080521

43009675

43009649

4302C060

4302C029

225

EVAPORATOR (*2)

EVAPORATOR (*1)

GUIDE, DRAIN

226

FILTER, AIR

227

FILTER, AIR

228

229

230

232

233

234

235

43049728

43019904

43049715

43062256

43062247

43082290

GUIDE, DRAIN, LEFT

HOLDER, SENSOR

LOUVER, HORIZONTAL

LOUVER, VERTICAL

MOTOR, FAN

HOLDER, EVAPORATOR, RIGHT

COVER, TERMINAL

MOTOR, LOUVER

CORD, MOTOR, LOUVER

BAND, MOTOR, LEFT

BASE, BEARING

FAN, CROSS FROW

BAND, MOTOR

COVER, LEAD

211

212

213

214

215

216

217

218

219

221

222

4306A024

43039363

43039321

43020315

43039314

43020253

4301V028

43049701

43049698

43047332

43047334

PLATE, INSTALLATION

4306S577 REMOTE CONTROLLER (Heat pump

models)

236

238

239

240

245

246

247

248

43083071

43003301

43070187

43079268

43080516

43080518

HOLDER, REMOTE, COMTROLLER

BODY ASS’Y, BACK

HOSE, DRAIN

BEARING

HOLDER, PIPE

PIPE, SHIELD (*1)

CAP, DRAIN

PIPE, SHIELD (*2)

PIPE, SUCTION (*2)

PIPE, SUCTION (*1)

ELECTRICAL AIR PURIFYING FILTER

GENERATOR, ASS’Y HV

4308N505 OWNER’S MANUAL

(*1) RAS-B16EKVP-E, RAS-M16EKCVP-E

(*2) RAS-B10EKVP-E, RAS-B13EKVP-E, RAS-M10EKCVP-E,

RAS-M13EKCVP-E

4306S578 REMOTE CONTROLLER (Cooling-only

models)

– 122 –

Indoor Unit (2)

Location No.

401

Part No.

Description

4306A123 TERMINAL BLOCK, 2P

402

43062189 COVER, E-PARTS

43050382 SENSOR, TC (F6)

43050400 SENSOR, TA

403

404

405

4306S484 P.C. BOARD ASS’Y, WRS-LED

406

43051343 SW-MICRO ASS

’Y

407

4306S609 PC BOARD ASS

4306S610 PC BOARD ASS

4306S611 PC BOARD ASS

43067113 CLAMP, CORD

’Y (B10EKVP-E, M10EKCVP-E)

’Y (B13EKVP-E, M13EKCVP-E)

’Y (B16EKVP-E, M16EKCVP-E)

408

409

410

– 123 –

13-2. Outdoor Unit

Location No.

001

Part No.

43005619

43005616

43005617

43005569

4301V035

4301V053

43042483

43119471

43062230

43041631

Description

Cabinet, Front

Location No.

025

Part No.

43046429

43046411

43058270

4302C048

Description

Valve, PMV, CAM-B22YGTF-2

Coil, PMV, CAM-MD12TF-1

Reactor

026

002

Cabinet, Upper

Cabinet, Side, Right

Cabinet, Side, Left

Guard, Fan

027

003

028

Motor, Fan, ICF-140-43-4

004

029

030

031

032

033

034

43020329

43047667

43039387

43104184

43004230

43032441

Fan, Propeller, PJ421

Nut, Flange

005

006

Guard, Fin

Base, Motor

007

Base Assy

Plate, Partition

008

Cover, Valve, Packed

Cover, Wiring, Assy

Plate, Fix, Valve, Packed

009

Nipple, Drain

(M14EAV-E , M18EAV-E)

010

Compressor DA111A1F-20F1

(M14EAV-E , M14EACV-E)

035

43089160

Cap, Waterproof

(M14EAV-E , M18EAV-E)

011

012

013

43041629

4314G177

43043733

Compressor DA130A1F-25F

(M18EAV-E , M18EACV-E)

036

037

038

039

040

4301P703

4301P729

43049749

43062176

43063321

Mark, Toshiba

Mark, Inverter

Rubber, Cushion

Sleeve, Flag

Condenser Assy

(M14EAV-E , M14EACV-E)

Condenser Assy

(M18EAV-E , M18EACV-E)

Holder, Sensor, φ4, 8-9.52

(Heat pump models: TD, TGa, TGb)

(Cooling-only models: TD)

014

015

016

017

018

019

020

021

022

023

43046392

43046391

43147196

43047401

43047653

43047654

43047657

43047658

43047651

43046439

Valve, Packed, 6.35

Valve, Packed, 9.52

Bonnet, 1/4inch

041

042

43063322

43063325

Holder, Sensor, φ6, 11.4-12.7 (TS)

Bonnet, 3/8inch

Holder, Sensor, φ6, 6.35-8

(Heat pump models: TE)

Nut, Flare, 6.35

Nut, Flare, 9.52

043

43063320

Holder, Sensor, φ6, 8-9.52

(Cooling-only models: TGa, TGb)

Cap, Valve, Packed, 6.35

Cap, Charge, Port

044

045

046

43063339

43050407

43063317

Holder, Sensor, (TO)

Thermostat, Bimetal

Holder, Thermostat

Valve, 4way, STF-0108Z

(M14EAV-E , M18EAV-E)

024

43046348

Coil, Solenoid

(M14EAV-E , M18EAV-E)

– 124 –

13-3. P.C. Board Layout

Cooling only model

Heat pump model

Location No.

701

Part No.

43050412

43050413

43050415

43050418

43050419

43050416

Description

Sensor , (Heat pump)

Sensor , TS

Location No.

707

Part No.

43050417

43050354

43062228

4306A027

4306S645

Description

Sensor , TGb (Cooling-only)

Sensor , TD

702

708

703

Sensor , TO

709

Base , PC Board

704

Sensor , TGa (Heat pump)

Sensor , TGb (Heat pump)

Sensor , TGa (Cooling-only)

710

Terminal Block (9P)

705

711

PC Board Assy , MCC–5009

(M14EAV-E, M14EACV-E)

706

712

713

4306S646

4306S667

PC Board Assy , MCC–5015

PC Board Assy , MCC–5009

(M18EAV-E, M18EACV-E)

– 125 –

Appendix

Cord Heater Installation Work

Applicable Models: RAS-10EAVP-E, RAS-13EAVP-E, RAS-16EAVP-E

1. Required parts for installation work (Recommendation)

No. Part name Q’ty

Specifications/Vendor

Remarks

Cord heater

Drain line heaters CSC2 (1.5m, 40W/m) by Flexelec com.

(Please go to the following URL.)

Procured locally

http://www.flexelec.com

Thermostat

US-622AXRLQE by ASAHI KEIKI

Procured locally

Operating temperature: on 4 ± 4°C, off 15 ± 3°C

A thermostat holder is incorporated with a thermostat in the package.

(Please go to the following URL.)

http://www.asahikeiki.co.jp/product/product.html

On self-responsibility, you can use a product manufactured by other

company (For example, Texas Instruments) if its characteristics are

equivalent to those of ASAHI KEIKI. However, when the shape of the

thermostat holder is different from that of ASAHI KEIKI, apply some

treatment to No.14 thermostat fixing plate and then fix the holder.

Fuse

ES3-5000, 250V / 5A by NAGASAWA Electric Co.

(Please go to the following URL.)

http://www.nagasawa-el.co.jp/

On self-responsibility, you can use a product manufactured by other

company if its characteristics are equivalent to those of NAGASAWA

Electric Co.

Procured locally

Fuse holder

GM1H-02 by NAGASAWA Electric Co.

(Please go to the following URL.)

http://www.nagasawa-el.co.jp/

On self-responsibility, you can use a product manufactured by other

company if its characteristics are equivalent to those of NAGASAWA

Electric Co.

P-shape

clamp

13 Use heat-resistance, weatherproof and non-hydrolytic type.

Material: 4-fluorinated ethylene copolymer

Harness diameter: Ø5.9

Use equivalence with the above specifications.

11 pieces are used to fix the cord heater to the outdoor unit base plate.

One piece is used to fix the power cord to the thermostat fixing plate .

One piece is used to fix the power cord to the terminal fixing plate.

P-shape

clamp

Use heat-resistance, weatherproof and non-hydrolytic type.

Material: 4-fluorinated ethylene copolymer

Procured locally

Harness diameter: Ø9.1

Use equivalence with the above specifications.

One piece is used to fix the cord heater to the outdoor unit base plate.

Screw

12 Self-tapping screw type-B Ø4 × 6mm, truss head, stainless

These screws are used to fix the cord heater to the outdoor unit base

plate with P-shape clamp.

Procured locally

Self-tapping screw type-B Ø4 × 8mm, truss head, stainless

Two screws are used to fix the thermostat fixing plate to the side cabinet (R).

One screw is used to fix the power cord to the thermostat fixing plate.

One screw is used to fix the power cord to the terminal fixing plate.

Screw

Self-tapping screw type-B Ø3.5 × 6mm, pan head

These screws are used to fix the thermostat to the thermostat fixing

plate with the thermostat holder.

Procured locally

10 Faston

#250 They are used for the connecting part to the thermostat.

UL sleeve for #250

Procured locally

11 Sleeve for

Faston

12 Close-end

connector

Use the most appropriate connector with the power cord diameter.

Procured locally

Appendix-1

Appendix

No. Part name Q’ty

Specifications/Vendor

2-cores x 0.75mm² or more, H05RN-F

Remarks

13 Power cord

Procured locally

14 Thermostat

fixing plate

Material: SGCC-Z08, Board thickness: 0.8t

Procured locally

(Drawing attached)

15 PVC tube

Inside diameter Ø8 x outside diameter Ø11 x 70 mm

Procured locally

16 Shield tube

Inside diameter Ø18 x outside diameter Ø26 x 70 mm

Material: Polyethylene foam

17 Bundling tie

Bundling tie for securing the wires

Material: 6/6 nylon

Procured locally

NOTE: The parts on the above table are recommended parts.

2. Required tools for installation work

No.

Part name

Plus screwdriver

Wrench

Specifications

Usage

It is used for disassembling and assembling of each cabinet.

It is used for disassembling and assembling of compressor fixing nuts.

Motor drill

Drill diameter:

Ø3.2 and Ø5.0

It is used to make the additional holes on the base or the side cabinet

(R).

Faston crimping tool Fixing jig for #250

Close-end connec-

tor crimping tool

Cutting plier

Stripper

Cutter knife

Insulation tape

10 Metal-cutting shears

It is used to process the side cabinet (L).

Appendix-2

Appendix

3. Cord heater installation wiring diagram

Fuse

Thermostat

Cord heater

* Be sure to connect the fuse and the thermostat to LIVE side of the cord heater.

Outdoor unit

Earth leakage circuit breaker

Power supply for air conditioner

Power supply for cord heater

NOTE:

Separate the cord heater power from the air conditioner power, and connect it to its exclusive breaker.

By doing so, the power consumption can be decreased because the breaker can be turned off if there is no

possibility of freezing of the base plate in cooling operation, etc.

When the cord heater power is connected to the inverter P.C. board assembly or others without connected to the

exclusive breaker, the control P.C. board of the inverter assembly may cause a failure.

When the cord heater has been mounted on a base plate, do not mount the water-proof cap and drain nipple which

are provided with the outdoor unit on the base plate.

Appendix-3

Appendix

4. Cord heater installation work procedure

No.

Photo / Explanatory diagram

Procedure

Remove each cabinet, inverter assembly, motor base assembly, and partition board assembly.

* Do not damage the electric parts such as cables, connectors, etc. while this work.

Remove the upper cabinet and the valve cover.

Upper cabinet

Related parts / Screws list

Used screw

Part name

Screw type

Quantity

1-1

Upper cabinet

Valve cover

Ø4 × 8

Ø4 × 1

Valve cover

Remove the front cabinet, the wiring cover and the

water-proof cover.

Water-proof

cover

Related parts / Screws list

Wiring cover

Used screw

Part name

1-2

Screw type

Quantity

Front cabinet

Wiring cover

Ø4 × 8

Front cabinet

Remove the side cabinet (R/L) and the inverter

assembly.

Side cabinet (L)

Inverter assembly

Side cabinet (R)

Related parts / Screws list

Used screw

Part name

Screw type

Quantity

1-3

Side cabinet (R)

Side cabinet (L)

Inverter assembly

Ø4 × 8

Remove the inverter assembly.

No. Part name

Connector No.

Connector color

White

TE sensor

TD sensor

TO sensor

TS sensor

CN600

CN601

CN602

CN603

White

4-way valve

coil

CN701

Yellow

1-4

PMV coil

CN700

CN300

White

Fan motor

Compressor

lead

White

(Intermediate connector)

Reactor

(2 pieces.)

Appendix-4

Appendix

No.

Photo / Explanatory diagram

Procedure

Remove the motor base assembly, partition plate assembly

and the sound insulation board.

Motor base

assembly

Related parts / Screws list

Partition plate

assembly

Used screw

Part name

Screw type

Quantity

1-5

Motor base assembly

Ø4 × 8

(Including motor and fan)

Partition plate assembly

(Including reactor)

Ø4 × 8

Sound

insulation board

Remove the fixing screws of the heat exchanger and the

valve fixing plate. Remove the compressor fixing bolt.

Valve fixing plate

Heat exchanger

Related parts / Screws list

Used screw

Part name

Screw type

Ø4 × 8

bolt

Quantity

Heat exchanger

Valve fixing plate

Compressor

1-6

Compressor

As shown in the left figure, remove the set of refrigeration cycle

assembly from the outdoor unit base plate.

* In this time, work attentively so that the cycle pipes are

not damaged by dent or deformation. Apply protective

measures to pipes if necessary.

1-7

Appendix-5

Appendix

No.

Photo / Explanatory diagram

Cord heater installation work

Procedure

Drill a hole on the outdoor unit base plate, and fix the cord heater to the outdoor unit base plate using P-shape

clamp.

Connect the cord heater cables.

Using a motor drill, etc., drill Ø3.2 holes on the outdoor unit base plate. (12 positions) See Appendix-10 for the

additional hole positions.

2-1

These holes are used to fix the cord heater to the outdoor unit base plate with P-shape clamp.

Insert the PVC tube into the cord heater.

This tube is designed to protect the cord heater from the

fixing screws used to secure the anchoring feet.

As shown in the left figure, install the cord heater (1.5m) to

the outdoor unit base plate by using P-shape clamp and

screws (Self-tapping screw type-B Ø4 × 6mm, stainless).

Pay attention to the direction of P-shape clamp so that it

is set to the same direction in the left figure.

The PVC tube must be

inserted into the cord

heater between the fixing

screws in order to protect

the cord heater from

these screws. Under no

circumstances must the

tube be allowed to ride

over the tip of the fixing

screws.

* If the drain port is frozen due to installation status,

etc., draw around the cord heater so that the end part

of the heater is inserted into the drain port. In this

case, add some fixing positions to fix the cord heater

surely.

2-2

PVC tube

φ9.1 P-shape clamp

* The end part from the marked part of the cord heater

heats up. When there is the heating part near the

electric parts box, a fire may generate. Be sure to set

the heating part on the outdoor unit base plate at the

fan room side or near it. (within 20cm from the

outdoor unit base plate)

* Be careful that the cord heater does not hit the fan.

Fix the cord heater without any loosening or sag.

Enlarged

marked part

Heating part

Drill a hole on the side cabinet (R) for fixing the

thermostat fixing plate.

Added hole 2-φ5

Ø5 hole at two positions

When drilling a hole on the side cabinet (R), be sure not

to damage the cabinet.

2-3

Side cabinet (R)

Appendix-6

Appendix

No.

Photo / Explanatory diagram

Procedure

Rework the side cabinet (L) to remove part of it.

Side cabinet (L)

The area to be removed is indicated by the shaded

lines in the left figure.

After removing part of the side cabinet (L), deburr the

edges of the side cabinet (L).

2-4

Delete

Perform end process and bundling of each cable.

Using fixing screws (Self-tapping screw type-B Ø3.5 ×

6mm), fix the thermostat to the thermostat fixing plate.

Close-end connector

insulation tape

Thermostat

Perform end process for various lead cables and

connect them according to the wiring diagram.

Power cord

Attach #250 Faston and UL-approved sleeves each to

the end of lead cables which are connected to the

thermostat.

2-5

Using insulation tape, apply protective measures to the

connected parts by the close-end connectors.

Cord heater

* Transparent

cover side:

L side

Thermostat

fixing plate

Using P-shape clamp and the screws (Self-tapping

screw type-B Ø4 × 8mm), fix the power cord to the

thermostat fixing plate.

P-shape clamp

Fuse

Fuse holder

When the power cord size does not match with P-shape

clamp, procure the most appropriate one at the local

site.

Appendix-7

Appendix

No.

Photo / Explanatory diagram

Procedure

Assembly

Return a set of the refrigeration cycle assembly into the outdoor unit base plate and reassemble sound insulation

board, partition plate assembly, fan motor assembly, and side cabinet (R/L) as original. Fix the thermostat fixing

plate to the side cabinet (R), built in the inverter assembly, and then connect various cables. After then,

incorporate front cabinet, upper cabinet, wiring cover, and valve cover as before.

Return a set of the refrigeration cycle assembly into the

outdoor unit base plate, and assemble sound insulation

board, partition plate assembly, fan motor assembly,

and side cabinet (R/L) as original.

3-1

Using screws (Self-tapping screw type-B Ø4 × 8mm,

stainless), fix the thermostat fixing plate to the side

cabinet (R).

Thermostat fixing plate

Side cabinet (R)

3-2

After incorporating the inverter assembly as before,

furthermore perform cable process for cord heater and

power cord.

Do not make cord heater loose.

Do not put the heating part near the electric parts box.

For the cord heater, perform cable process so that there

is no looseness or sag at the fan side.

Perform cable process for collected

cord heater and fan motor lead cables.

Perform cable process for the cord heater together with

the fan motor lead cable, and collect the remained part

of cables at cable process part of the inverter.

Secure the power cord for the cord heater to the

terminal block mounting plate using the P-shape clamp,

and pull it out from the wiring area of the side cabinet

(R).

P-shape

clamp

3-3

* Check that there is the marked part of the cord heater

on the outdoor unit base plate or near it.

When there is the heating part near the electric parts

box, a fire may generate.

Power cord for

cord heater

Since the lead wires connected to the cord heater and

thermostat may come into contact with the edges of the

sheet metal or tips of the screws, wrap the shield tubes

around the leads to protect them and use the bundling

ties to secure them.

To keep the lead wires from coming into contact with the

edges of the sheet metal or tips of the screws, wrap the

shield tubes around the leads to protect them and use

the bundling ties to secure them.

3-4

Incorporate front cabinet, upper cabinet, wiring cover, water-proof cover and valve cover as before.

In installation work, connect power cord for the cord heater to another breaker separated from one for power cord

of the air conditioner.

Appendix-8

Appendix

5. Drawing of thermostat fixing plate

2- 3.4 burring hole

(Upward)

3- 3.4 burring hole

(Downward)

Material: SGCC-Z08,Thickness: 0.8t

Appendix-9

Appendix

6. Diagram showing positions φ3.2 mm holes to be additionally drilled in base plate

Appendix-10

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