2 0 1 2
Room Air Conditioners
AUTO
AUTO AN
F
C
F
AM
CONTINUOUS
88
ON OFF
SCHEDULE
SET POINT
ROOM TEMP
CHECK$ MART
FILTER
AUTO SPEED
SYSTEM
FAN MODE
POWER
FAN SPEED
SCHEDULE
Q Chassis Models
115-Volt: SQ05N10*, SQ06N10*, SQ08N10*, SQ10N10*
Cool Only
115-Volt: EQ08N11*
Cool and Electric Heat
KuhlQ_Serv/Parts Man (4-12)
Last character may vary.
*
93001401_01
IMPORTANT SAFETY INFORMATION
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with the safety procedures required for installation and repair, and who is equipped with the proper tools and
test instruments required to service this product.
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shock which can be serious or even fatal.
Safety warnings have been placed throughout this manual to alert you to potential hazards that may be
encountered. If you install or perform service on equipment, it is your responsibility to read and obey these
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Your safety and the safety of others are very important.
We have provided many important safety messages in this manual and on your appliance. Always read
and obey all safety messages.
This is a Safety Alert symbol.
This symbol alerts you to potential hazards that can kill or hurt you and others.
All safety messages will follow the safety alert symbol with the word “WARNING”
or “CAUTION”. These words mean:
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WARNING
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CAUTION
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and tell you what will happen if the instructions are not followed.
A message to alert you of potential property damage will have the
word “NOTICE”. Potential property damage can occur if instructions
are not followed.
NOTICE
PERSONAL INJURY OR DEATH HAZARDS
ELECTRICAL HAZARDS:
%ꢀ Unplug and/or disconnect all electrical power to the unit before performing inspections,
maintenance, or service.
%ꢀ Make sure to follow proper lockout/tag out procedures.
%ꢀ $OZD\VꢀZRUNꢀLQꢀWKHꢀFRPSDQ\ꢀRIꢀDꢀTXDOL¿HGꢀDVVLVWDQWꢀLIꢀSRVVLEOHꢁꢀ
%ꢀ Capacitors, even when disconnected from the electrical power source, retain an electrical charge
potential capable of causing electric shock or electrocution.
%ꢀ Handle, discharge, and test capacitors according to safe, established, standards, and approved
procedures.
%ꢀ ([WUHPHꢀFDUHꢋꢀSURSHUꢀMXGJPHQWꢋꢀDQGꢀVDIHW\ꢀSURFHGXUHVꢀPXVWꢀEHꢀH[HUFLVHGꢀLIꢀLWꢀEHFRPHVꢀQHFHVVDU\ꢀ
to test or troubleshoot equipment with the power on to the unit.
2
%ꢀ Do not spray or pour water on the return air grille, discharge air grille, evaporator coil, control panel,
and sleeve on the room side of the air conditioning unit while cleaning.
%ꢀ Electrical component malfunction caused by water could result in electric shock or other electrically
unsafe conditions when the power is restored and the unit is turned on, even after the exterior is dry.
%ꢀ Never operate the A/C unit with wet hands.
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%ꢀ Use on a properly grounded outlet only.
%ꢀ Do not remove ground prong of plug.
%ꢀ Do not cut or modify the power supply cord.
%ꢀ Do not use extension cords with the unit.
%ꢀ Follow all safety precautions and use proper and adequate protective safety aids such as: gloves,
goggles, clothing, adequately insulated tools, and testing equipment etc.
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REFRIGERATION SYSTEM HAZARDS:
%ꢀ Use approved standard refrigerant recovering procedures and equipment to relieve pressure before
opening system for repair.
%ꢀ Do not allow liquid refrigerant to contact skin. Direct contact with liquid refrigerant can result in minor
WRꢀPRGHUDWHꢀLQMXU\ꢁꢀ
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surfaces can cause serious burns.
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possible.
%ꢀ Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for
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%ꢀ Make sure to follow all safety precautions and to use proper protective safety aids such as: gloves,
safety glasses, clothing etc.
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MECHANICAL HAZARDS:
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troubleshooting, handling, or working around unit with moving and/or rotating parts.
%ꢀ Be careful when, handling and working around exposed edges and corners of sleeve, chassis, and
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%ꢀ Use proper and adequate protective aids such as: gloves, clothing, safety glasses etc.
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3
PROPERTY DAMAGE HAZARDS
FIRE DAMAGE HAZARDS:
%ꢀ Read the Installation/Operation Manual for this air conditioning unit prior to operating.
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%ꢀ Connect to a properly grounded outlet only.
%ꢀ Do not remove ground prong of plug.
%ꢀ Do not cut or modify the power supply cord.
%ꢀ Do not use extension cords with the unit.
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WATER DAMAGE HAZARDS:
%ꢀ Improper installation maintenance, or servicing of the air conditioner unit, or not following the above
Safety Warnings can result in water damage to personal items or property.
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%ꢀ Do not drill holes in the bottom of the drain pan or the underside of the unit.
%ꢀ Failure to follow these instructions can result in result in damage to the unit and/or minor to serious
property damage.
INTRODUCTION
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with each unit.
This service manual was written to assist the professional HVAC service technician to quickly and accurately
diagnose and repair any malfunctions of this product.
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IMPORTANT:
It will be necessary for you to accurately identify the unit you are
servicing, so you can be certain of a proper diagnosis and repair.
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Register your air conditioner
Model information can be found on the
name plate behind the front cover.
Please complete and mail the owner
registration card furnished with this
com. For your convenience, record the
model information here.
FRIEDRICH
AIR CONDITIONING CO.
SAN ANTONIO, TX
MODEL NUMBER
EQ08N11-A
SERIAL NUMBER
AALY00219
VOLTS 60 HZ/ 1PH
115
103 VOLT MIN.
COOLING:
BTU/HR
7500
EER
9.8
AMPS
6.9
HEATING:
BTU/HR
4000
EER
AMPS
11.2
MAX AMPS:
23.5 OZS.
DESIGN PRESSURES
600 PSIG HS
300 PSIG LS
MODEL NUMBER
U.S. PATENTS
D458, 229
5,634,346
S
IF CONNECTED TO
FUSE PROTECTED
CIRCUIT USE 12
A
,
A
A
TIME DELAY FUSE
LISTED 183H
ROOM AIR
CONDITIONER
SERIAL NUMBER
PURCHASE DATE
FRIEDRICH
AIR CONDITIONING CO.
SAN ANTONIO, TX
Assembled in Mexico
MODEL NUMBER
EQ08N11-A
SERIAL NUMBER
AALY00219
VOLTS 60 HZ/ 1PH
4
UNIT IDENTIFICATION
KuhlQ Model Number Code
S Q 08 N 1 0 A - A
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,QGLFDWHVꢀ0RGL¿FDWLRQ
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1st Digit – Function
E = Electric Heat
S = Straight Cool
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7th Digit – Options
0 = Straight Cool
1 = 1 KW Heat Strip, Nominal
2nd Digit
Q = Chassis Size
6th Digit – Voltage
1 = 115 Volts
5th Digit - Model Series / Year Introduced
3rd and 4th Digit - Approximate
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N=2012
Heating BTU/Hr capacity listed in the
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Serial Number
Decade Manufactured
A
B
A
Y
00001
Production Run Number
/ ꢊꢀ
A=1
B=2
& ꢈꢀꢀ ) ꢃꢀꢀ - ꢅꢀ
D=4
E=5
G=7
H=8
Year Manufactured
Product Line
Kuhl Q
A=1
B=2
D=4
E=5
G=7
H=8
K=0
& ꢈꢀ ) ꢃꢀꢀ - ꢅꢀꢀ
Month Manufactured
A=Jan D=Apr G=Jul K=Oct
B=Feb E=May H=Aug L=Nov
C=Mar F=Jun J=Sept M=Dec
5
PERFORMANCE DATA
*
R-410A
REF.
EVAP. AIR TEMP. DEG. F
OPERATING PRESSURES
ELECTRICAL RATINGS
BREAKER FUSE
60 Hertz Amps
COOLING
PERFORMANCE DATA**
CONDENSER
TEMPERATURE DEG. F
Discharge Temp Suction Temp Super Heat Sub-Cooling
Voltage
Temp.
Drop F.
Locked Rotor Charge in
Discharge Air
Suction
Discharge
Amps Cool Amps Heat
Amps
OZ.
17.0
17.0
57
57
23
23
115
115
146
63
63
10
10
13
13
158
150
387
387
9
29.0
115
115
15
15
SQ05N10-A
SQ06N10-A
146
4.9
29.0
SQ08N10-A
SQ10N10-A
EQ08N11-A
58
53
53
23
22
27
118
122
117
158
164
159
63
58
61
12
11
20
20
23
19
147
136
146
415
428
411
6.6
9.2
32.0
50.0
32.0
22.0
23.5
18.5
115
115
115
15
15
15
6.7
11.2
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ꢏꢏꢀ5DWLQJꢀ&RQGLWLRQVꢐꢀꢄꢊꢀGHJUHHVꢀ)ꢋꢀURRPꢀDLUꢀWHPSꢁꢀ ꢀꢂꢊꢑꢀUHODWLYHꢀKXPLGLW\ꢋꢀZLWKꢀꢅꢂꢀGHJUHHꢀ)ꢋꢀRXWVLGHꢀDLUꢀWHPSꢀ ꢀꢉꢊꢑꢀUHODWLYHꢀKXPLGLW\ꢋꢀDOOꢀV\VWHPVꢀXVHꢀ5ꢉꢆꢊ$ꢁ
*
Energy
Estimated
Yearly
Operating Removal Circulation
Room Side
Air
Moisture
Net
Weight Ship
Cooling
Capacity Btu Capacity Btu
Heating
Volts
Rated
Cooling
Amps
Cooling
Watts
Heating
Amps
Heating
Watts
Ratio
EER
Model
COP
Cost
Pints/HR
CFM
Sleeve Lbs
Wt
Kühl
®
SQ05N10
SQ06N10
SQ08N10
SQ10N10
5500
5900
7500
9500
—
—
—
—
115
115
115
115
4.5
4.9
6.1
8.4
514
561
700
969
—
—
—
—
—
—
—
—
10.7
18.7
10.7
9.8
$41
$45
$56
$77
0,5
0.5
1.2
2.1
190
190
240
240
Q
Q
Q
Q
65
71
71
75
78
84
84
88
*
*
*
*
Kühl+
®
Electric Heat
EQ08N11
7500
4000
115
6.9
765
11.2
1290
1.9
11.7
$61
1.9
175
Q
72
84
*
As an ENERGY STAR® partner, Friedrich Air Conditioning Co. has determined that the selected ENERGY STAR® models
meet the ENERGY STAR®
Estimated yearly operating cost based on a 2007 national average electricity cost of 10.65 cents per kWh.
C
US
Installation Information / Sleeve Dimensions
Thru-the-wall Installation
Finished Hole
Depth Shell Depth to
Window Width
Minimum
Extension
Into Room*
Minimum
Extension
Outside*
with Front
Louvers
Sleeve
Height
Width
19
Minimum** Maximum Height
22" 42" 14
Width
Max. Depth
Q
14"
21 3
8
"
"
20"
8
”
"
8
"
5
"
10
"
* Minimum extensions when mounted in a window.
** Minimum widths achieved using one side curtain assembly as opposed to both in a standard installation.
Circuit Rating / Breaker
Circuit Rating
Breaker or
T-D Fuse
Plug
Face
(NEMA#)
Wall Outlet
Appearance
PowerCord
Length (ft.)
Model
SQ05N10 , SQ06N10
,
7
*
*
SQ08N10 , SQ10N10
*
EQ 08N 11
*
*
125V -15A
5 -15P
6
Front
SIDE VIEW
(
Window Mounting Kits
Heat/Cool Models
Kit No.
EQ 08 N11
WIKQ
*
Friedrich heat/cool models include accessories for
thru-the-wall installation only. Window mounting requires
use of optional accessory kit as listed above.
6
ELECTRICAL DATA
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation.
All electrical connections and wiring MUST be
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the National Electrical Code and all local codes
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)DLOXUHꢀWRꢀGRꢀVRꢀFDQꢀUHVXOWꢀLQꢀSHUVRQDOꢀLQMXU\ꢀRUꢀ
death.
NOTICE
FIRE HAZARD
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electically unsafe conditions which could cause moderate
or serious property damage.
Read, understand and follow the above warning.
Wire Size
Use ONLY wiring size recommended for single outlet branch circuit.
Fuse/Circuit Breaker
Use ONLY the correct HACR type and size fuse/circuit breaker. Read electrical ratings on unit’s
rating plate. Proper circuit protection is the responsibiity of the homeowner.
Grounding
Unit MUST be grounded from branch circuit through service cord to unit, or through separate
ground wire provided on permanently connected units. Be sure that branch circuit or general
purpose outlet is grounded.
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Do NOT alter the service cord or plug. Do NOT use an extension cord. Refer to the table above
for proper receptacle and fuse type.
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*HACR: Heating Air Conditioning and Refrigeration
7
WARNING: Before Operating Your Unit
Make sure the wiring is adequate for your unit.
WARNING
Electrical Shock Hazard
Make sure your electrical receptacle has the
same configuration as your air conditioner’s
plug. If different, consult a Licensed Electrician.
If you have fuses, they should be of the time delay type. Before you install
or relocate this unit, be sure that the amperage rating of the circuit breaker
or time delay fuse does not exceed the amp rating listed in Table 1.
Do not use plug adapters.
DO NOT use an extension cord.
Do not use an extension cord.
Do not remove ground prong.
The cord provided will carry the proper amount of electrical power to the
unit; an extension cord may not.
Always plug into a grounded 3 prong oulet.
Failure to follow these instructions can result in
death, fire, or electrical shock.
Make sure that the receptacle is compatible with the air
conditioner cord plug provided.
This insures proper grounding. If you have a two prong receptacle you
will need to have it replaced with a grounded receptacle by a certi¿ed
electrician. The grounded receptacle should meet all national and local
codes and ordinances. Under no circumstances should you remove the
ground prong from the plug. You must use the three prong plug furnished
with the air conditioner.
CIRCUIT RATING
REQUIRED WALL
OR TIME DELAY
RECEPTACLE
FUSE
MODEL
AMP
VOLT
NEMA NO.
SQ05 ‡ SQ06
SQ08 ‡ SQ10
EQ08
Test the power cord
15
125
5-15P
All Friedrich room air conditioners are shipped from the factory with a
Leakage Current Detection Interrupter (LCDI) equipped power cord. The
LCDI device meets the UL and NEC requirements for cord connected air
conditioners effective August 2004.
Table 1.
Figure 1
To test your power supply cord:
RESET
1. Plug power supply cord into a grounded 3 prong outlet.
2. Press RESET (See Figure 1).
TEST
3. Press TEST, listen for click; the RESET button trips and pops out.
WARNING:
4. Press and release RESET (Listen for click; RESET button latches
TEST BEFORE EACH USE!
1. PRESS REST BUTTON.
2. PLUG LCDI INTO POWER
RECEPTACLE.
and remains in). The power cord is ready for use.
3. PRESS TEST BUTTON,
RESET BUTTON SHOULD
POP UP.
Note: The LCDI device is not intended to be used as an ON/OFF switch.
4. PRESS RESET BUTTON
FOR USE.
DO NOT USE IF ABOVE TEST
FAILS.
Once plugged in, the unit will operate normally without the need to reset
the LCDI device.
WHEN GREEN LIGHT IS ON.
IT IS WORKING
PROPERLY!
If the LCDI device fails to trip when tested or if the power supply cord is
damaged, it must be replaced with a new power supply cord from the
manufacturer. Contact our Technical Assistance Line at (800) 541-6645.
To expedite service, please have your model number available.
For the best cooling performance and highest energy efficiency
Keep the filter clean
Insulation
Make sure that your air conditioner is always in top performing condition by Good insulation will be a big help in maintaining desirable comfort levels.
cleaning the filter regularly.
Doors should have weather stripping. Be sure to caulk around doors and
windows.
Provide good air flow
Make sure the airflow to and from the unit is clear. Your air conditioner puts the Proper installation of chassis seal gasket
conditioned air out at the top of the unit, and takes in unconditioned air at the Make sure the seal gasket has been installed properly to minimize noise and
bottom. Airflow is critical to good operation. It is just as important on the outside improve efficiency. If the chassis seal gasket has not been installed, please
of the building that the airflow around the unit exterior is not blocked.
refer to Step 14 of the installation instructions.
Unit placement
If your air conditioner can be placed in a window or wall that is shaded by a tree
or another building, the unit will operate even more efficiently. Using drapes or
blinds on the sunny side of the dwelling will also add to your unit’s efficiency.
8
Kuhl Q Control Panel Operation
Let’s check out how to control your air conditioner. On the control panel, just above the POWER , is a liquid crystal display (LCD). All of the control panel function
buttons and mode icons can be viewed in Figure 6.
Power On – Press the button to turn on the air conditioner. The power button illuminates to indicate that the power is on. The backlight on the power switch
will automatically dim to 20% intensity after 15 seconds of inactivity. The remote control can also be used to turn power ON / OFF (See Remote Control).
Display – The display is a high ef¿ciency LCD with a built-in white backlight. The backlight has an automatic two (2) step dim function. After 15 seconds of
inactivity, the display dims to 20% intensity. After an additional 120 seconds, the display switches off. Touching any button automatically changes the display
to full brightness.
There are three control push buttons on each side of the display.
FAN
CONTROL
Figure 2
ONLY LOCKED
COOL
HEAT
WI-FI
OPERATING (if equipped)
SYSTEM:
TEMPERATURE:
Increment UP
Cycles between
HEAT, COOL or
FAN ONLY
WAIT
COMPRESSOR
3 MINUTES
TIME DELAY
FAN MODE:
C
Sets fan to either:
- Cycle automatically
- Run continuously
TEMPERATURE:
Increment DOWN
ON OFF
SCHEDULE
SCHEDULE ON
CHECK $MART
FILTER
TIMER / SCHEDULE
Turns ON or OFF
FAN SPEED:
Sets fan speed:
LOW, MED, HIGH
or AUTO
TIMER ON
(as equipped)
IR WINDOW:
Do not block
ON / OFF:
Turns unit on/off
2 DIGIT DISPLAY
Shows Setting for:
FILTER
Check / Clean
- Set Point (Temperature)
- Room Temperature
- Clock (AM/PM)
AUTO SPEED
Automatically selects
best fan cooling or heating speed
FAN SPEED
Selected fan speed
SMART OPERATING
(see page 10)
ꢅ
Kühl Control Options
The
The “Residential” (40 Hr. Work Week) Schedule has four (4) time periods: 06:00,
08:00, 18:00, and 22:00. This option will cause your Kühl Q unit to raise the room
temperature temporarily to 85°F during the hours when most people are away
at work, lower them again to 78°F prior to the time when most people will return
home, and then raise slightly to 82°F to maintain a comfortable temperature
overnight.
Kühl gives you a variety of options for control, programming, and
scheduling including wireless capabilities
Wireless Programming and Control:
The new FriedrichLink™ Adapter (sold seperately) allows you to conviently
control, program and monitor your air conditioning unit remotely from a
smartphone or computer.
The “Commercial” (5-Day Business Week) Schedule has two (2) time periods:
07:00 and 18:00. This option will cause your air conditioner to raise temperatures
to 84°F after typical working hours and on weekends when commercial spaces
are typically unoccupied.
FriedrichLink™ Adapter accessory available through Friedrich authorized
(See Control Panel Operation Instructions Section)
Pre-Programmed Scheduling Options:
Customizable Programming Options:
Your unit’s digital control comes equipped with a 24-hour timer and two pre-
programmed 7-day energy management options.
Customizable schedules, with up to four temperature adjustments per day, can
either be uploaded to the unit via the air conditioner’s built-in micro USB interface
or conveniently transmitted wirelessly using the new FriedrichLink™ Adapter
accessory, greatly simplifying the programming of one or multiple units.
See Figure 7.
24-Hour Timer
The 24-hour timer allows you to turn the unit off and on at pre-set times by
setting an on and off time on the unit control panel. (See page 11 for details on
timer set-up.)
Programming instructions.
Pre-programmed Energy Management
Your unit comes from the factory with two (2) Pre-programmed Energy
Management settings are shown in Addendum 1 (Residential & Commercial
Schedule Table).
Smart Grid
The Kuhl Unit is also able to be controlled by a Smart Grid.
Energy Management Schedule Options are:
1. Residential Schedule – 40 Hr. Work Week
Smart Grid is a network that brings electricity from power stations to
consumers using new technologies that allow power companies to adjust
electrical loads of residential users. Check with your local electric company
to learn more about Smart Grid programs in your area.
2. Commercial Schedule – 5-Day Business Week
Figure 3
FRR203
10
FAN
MODE
AUTO FAN
FAN MODE – The
button allows you to select between
and
Control Panel Operation Instructions
CONTINUOUS
modes. To select, press once and let go.
SYSTEM
SYSTEM - The
button allows you to sequentially select three modes
of operation. To select, press once and let go.
COOL MODE
HEAT MODE
Not available on some models
F
FAN ONLY MODE
AUTO FAN
COOL MODE
SET POINT
FRR112
AUTO FAN
When in the
mode, the fan operates only when the system has
a demand to cool or heat the room. Note: the fan is off (no fan speed icon),
indicating no command for cooling or heating.
AUTO FAN (Cooling Demand)
FRR103
FRR104
FRR105
HEAT MODE
F
AUTO FAN
SET POINT
FRR106
System has a demand for cooling. The fan is operating at a medium speed.
CONTINUOUS
FAN ONLY MODE
F
CONTINUOUS
SET POINT
FRR113
CONTINUOUS
In the
fan mode, the fan operates all the time. The system
periodically cools or heats the fan's airÀow but the Àow of air does not stop.
When in the SYSTEM COOL or HEAT or FAN ONLY mode, you
can also select FAN MODE, FAN SPEED, TIMER SCHEDULE,
. The SYSTEM MODE does not change.
and
FAN
SPEED
FAN SPEED - The
button allows you to toggle between four modes of operation: LOW, MEDIUM, HIGH and AUTO. Press once and let go each time.
AUTO
FRR095
During the (SYSTEM mode COOL or HEAT), the fan speed automatically varies depending on the difference between the unit's set point on the control
panel and the actual room temperature. Let me explain. Say for example, you’re working in your garage and you open the big door for several minutes. The
system will sense a wide difference between the set point and the actual room temperature. When this occurs, the system fan speed increases to HIGH for
a period of time. The fan speed decreases, in step, as the temperature difference decreases. When the room temperature matches the system's set point,
fan speed returns to the lowest setting, and if the fan mode is on AUTO FAN, the fan will stop.
11
UP and DOWN
the system's set point (desired room temperature). These buttons are also
used for setting the Timer and other programming.
- arrows - Pressing either
or button changes
ºF - ºC Select
F
AUTO FAN
F
AUTO FAN
SET POINT
SET POINT
FRR132
To switch from degrees Fahrenheit (F) to Celsius (C), press and
buttons simultaneously for three seconds.
FRR100
F
AUTO FAN
SET POINT
FRR101
FRR133
One press equals 1 degree of change. Holding the button down for more
than 0.6 seconds starts the fast increment/decrement change of the set
point.
An“F”will flash for 5 seconds and then revert to a normal display.To change
from F to C, press the or button within 5 seconds.
TIMER SCHEDULE BUTTON -
TIMER
SCHEDULE
The
button has two main uses:
or SCHEDULE
pre-selection instructions, please see page 14.)
2. Used to turn on or activate the pre-selected TIMER or
SCHEDULE
1.Used to preselect a TIMER
function. (For
.
TIMER
SCHEDULE
3. To turn on your pre-selction, press the
button once and let
or
go. The display at bottom right will show the TIMER icon
FRR134
SCHEDULE icon
.
A “C” will Àash for 5 seconds and then revert to a normal display.
Example:
TIMER is turned ON
SCHEDULE is turned ON
C
AUTO FAN
TIMER (FACTORY DEFAULT) - The TIMER is the default on new
units. The TIMER function allows you to turn the unit one time ON
and one time OFF daily at the times that you select. For example, you
can command the system to turn ON at 8:15 am and to turn OFF at
1:30 pm everyday. (To set the timer, see pages 15 -16.)
SET POINT
FRR135
SCHEDULE- The SCHEDULE
pre-programmed energy management settings: temperature, system
has two options with factory
The ºF icon goes away and the ºC icon illuminates on the normal display.
and time settings (see addendum) (for more information, see page 14).
Schedule options are:
1. Residential Schedule - 40 hour work week
2. Commercial Schedule - 5 day business week
(These factory pre-programmed settings can only be
changed by using the WiFi FriedrichLink™ adaptor, with
which you can create your own custum program. See page
10.)
12
DIM Function
Wait Icon
There are three separate display brightness levels, AUTO, 20% and full
(100%). To change the DIM setting, press the Power button for three
seconds.
F
AUTO FAN
SET POINT
FRR120
The wait icon illuminates when the compressor lockout is active.
FRR192
Control Panel Lock
The 1 indicates a DIM setting of Auto (factory default on new units). Use
FAN
SPEED
TIMER
SCHEDULE
To lock the front panel controls, press and hold the
for 3 seconds. The lock icon
+
buttons
the
or
buttons to change the setting.
illuminates to indicate the locked status.
During lockout, none of the control panel buttons will operate.
F
AUTO FAN
SET POINT
FRR193
The 2 indicates a DIM setting of 20%. Press the TIMER SET button within
15 seconds to save the setting. Button inactivity for more than 15 seconds
causes the display to time out and return to the normal operating display.
FRR116
FAN
SPEED
TIMER
SCHEDULE
To unlock, press and hold the
seconds.
+
buttons simultaneously for 3
External Control Status
$MART
The
icon illuminates to indicate that the system is being controlled
remotely, such as from a smart grid from a power company (for more
information, see page 12).
SMART
F
FRR194
The 3 indicates a DIM setting of 100% (full brightness). Press the TIMER
SET (Refer to Figure 8) button within 15 seconds to save the setting.
Button inactivity for more than 15 seconds causes the display to time out
and return to the normal operating display.
AUTO FAN
SET POINT
$MART
Alerts
CHECK
FILTER
FRR125
When the ¿lter needs to be cleaned or replaced, the
icon displays.
WiFi Connection
F
F
AUTO FAN
AUTO FAN
SET POINT
SET POINT
CHECK
FILTER
FRR118
FRR126
FAN
MODE
TIMER
SCHEDULE
The
icon illuminates to indicate that the system is receiving a Wi-Fi
The alert can be dismissed by pressing the
and
for 3 seconds.
connection (for more information, see page 10).
13
TIMER OR SCHEDULE OPTIONS 1 OR 2 SELECTION
The control system has one Timer and two Schedule functions:
A. Timer (factory default) - Allows you to command the unit to turn
ON and OFF at a time you program. Setting the start, stop and day
can be found latter in this manual on page 15.
F
AUTO FAN
B.
Residential Schedule - When selection #1 is selected, the unit
follows a pre-programmed set of operational parameters that
covers 7 days of the week with 4 time windows during each day.
Each time window has it's own set of 8 operating parameters.
Refer to Addendum 1.
SET POINT
FRR136
C.
Commercial Schedule - When selection #2 is selected, the unit
follows a pre-programmed set of operational parameters that
covers 7 days of the week with 2 time windows during each day.
Each time window has it's own set of 8 operating parameters.
Refer to Addendum 1.
The display reverts to the normal display.
NOTE: The schedule options 1 and 2 have factory pre-programmed
settings which can only be changed by using the WiFi FriedrichLink™
adaptor (an accessory). With it, you can create your own custom
schedule program. See page 10 for more information.
TIMER
SCHEDULE
To change the TIMER/SCHEDULE selection, press and hold the
button for 3 sec, then let go.
NOTE: Once you have selected the TIMER
you must first set the
following before turning it on.
1. Set time and day
2. Set start time
3. Set stop time
See timer settings on next page.
To Turn On the Timer or Schedule Selected
FRR139
The display shows the TIMER is selected. Press the
let go.
button once and
FRR139
SCHEDULE
TIMER
Press the
SCHEDULE
button and let go. The system will operate in the mode
mode option (1, 2 or Timer) you selected. At the above image, TIMER is
selected and turned on.
FRR137
The display shows option 1 (Residential Schedule) is selected. Press
the button once and let go.
SCHEDULE
FRR138
The display shows option 2 (Commercial Schedule) is selected.
To save and exit selection, press the TIMER SET button (Figure 4, Page
15).
14
TIMER SETTINGS
1. Set time and day
2. Set start time
3. Set stop time
F
Figure 4
AUTO FAN
SET POINT
FRR131
Press TIMER SET (Refer to Figure 4) button to exit and save the SET
TIME function. The TIMER SET button must be pressed within 15 second.
Button inactivity for more than 15 seconds causes the display to time out
and return to the normal operating display.
TIMER HOUR
SET
MIN
FRIEDRICH
AIR CONDITIONING CO.
SAN ANTONIO, TX
Timer Start Time
FRR097
F
SET TIME AND DAY - To adjust the unit's time press and hold the HOUR
and the MIN buttons for three seconds (Refer to Figure 4).
AUTO FAN
SET POINT
AM
FRR140
The display shows a normal system. Press and hold the HOUR button
(Figure 4) for 3 seconds. Note: The Timer start-stop times may be set even
when the system is in the Timer or Schedule mode.
FRR128
The unit's current hour displays. Use the
or
buttons to adjust the
hour. To change from AM to PM continue to increment (roll) the display.
Press TIMER SET (Refer to Figure 4) button to save the hour and display
the unit’s current minutes.
AM
ON
FRR141
Use the
or
button to adjust the hour. Press the TIMER SET button
(Figure 4) to adjust the minutes.
FRR129
Use the
or
buttons to adjust the minutes. The clock is now set
for 11:25 AM. Press TIMER SET (Refer to Figure 4) button to display the
unit's day setting.
ON
FRR142
Use the
or
button to adjust the minutes. Press the TIMER SET
button (Figure 4) within 15 seconds to exit and save the setting. The timer
is now set to start at 4:21 AM.
The display will return to normal.
FRR130
Use the
or
buttons to adjust the day (1 to 7). The day setting is up
to the user. If you set the current day = 1. So if today is Tuesday, then
Day 1 = Tuesday, select 1.
15
Set theTimer Stop Time
Timer ON Scenarios
Scenario 1
F
AUTO FAN
F
AUTO FAN
SET POINT
SET POINT
FRR144
The display shows a normal system. Press and hold the MIN button (Figure
4) for 3 seconds. Note the Timer start - stop times may be set even when
the system is in the Schedule mode.
FRR156
The display shows a normal operating system.
AM
OFF
FRR145
FRR157
Use the
or
button to adjust the hour. Press the TIMER SET button
If the Timer function is turned ON during the Timer’s OFF time, the
illuminates. The control system immediately turns the unit OFF.
icon
(Figure 4) to advance to the Minutes section.
Scenario 2
F
OFF
AUTO FAN
SET POINT
FRR146
Use the
or
button to adjust the minutes. Press the TIMER SET
button (Figure 4) within 15 seconds to exit and save the setting. The timer
is now set to stop at 11:55 AM. The display returns to normal.
FRR158
The display shows a normal operating system.
Turning the TIMER ON once the time and day, the start and top times
have been set:
TIMER
SCHEDULE
Press the
button once and let go.
ON/OFF scenarios.
F
AUTO FAN
NOTE: See the following TIMER
SET POINT
FRR159
If the Timer function is turned ON during the Timer’s ON time, the
illuminates. The control system immediately turns the unit OFF.
icon
16
Timer OFF Scenarios
Scenario 1
Timer - Schedule Control Block
F
AUTO FAN
SET POINT
SCHEDULE
FRR166
FRR148
The display shows the unit in Timer mode during an in-active (OFF) period.
If the unit is operating in the TIMER or SCHEDULE mode, and you press
TIMER
SCHEDULE
any bytton except the
button, the TIMER
icon begins to
blink. All button action is blocked.
F
AUTO FAN
F
AUTO FAN
SET POINT
SET POINT
SCHEDULE
FRR167
If the Timer function is turned OFF during an in-active (OFF) period, the
Timer icon turns off. The display shows a normal system.
FRR149
The TIMER
icon stops blinking after 3 seconds. You must turn the
active TIMER or SCHEDULE mode OFF before making changes. Once
Scenario 2
TIMER
SCHEDULE
the changes are made, press the
or SCHEDULE mode.
button to re-activate TIMER
If the unit is operating in the TIMER or SCHEDULE mode, and then you
TIMER
SCHEDULE
F
press any button except the
to blink.
button, the TIMER
icon begins
AUTO FAN
SET POINT
F
AUTO FAN
FRR168
The display shows the unit in Timer mode during an active (ON) period.
SET POINT
FRR150
F
All button action is blocked.
AUTO FAN
SET POINT
FRR169
If the Timer function is turned OFF during the ON time. The Timer icon
turns off. The control stays in the current state.
The display shows a normal system.
17
FAN SPEED Button - Used to sequentially select new fan speed, plus
Remote Control Operation
FAN
SPEED
AUTO operation. When the
button is pressed, the fan speed icon
(triangle) changes to indicate the new speed level. Fan speed automatically
varies depending on the set temperature on the control panel and the actual
room temperature. For example if there is a big difference between your
set temperature and the actual room temperature, the system fan speed
increases to HIGH. It remains at this speed until the room temperature
matches the set temperature.
Remote Control - Refer to Figures 10 and 11 during operation description.
Getting Started - Install two (2) AAA batteries in the battery compartment
located on the back of the unit.
Operation - The remote control should be within 25 feet of the air
conditioner for operation. (Refer to Figure 9 for effectiveness). Press the
power button to turn the remote on. The remote will automatically power
off after 15 seconds if the buttons are not being pressed. The remote must
be on to control the unit.
TIMER
TIMER/SCHEDULE Button – The SCHEDULE button turns the schedule function
SCHEDULE
on and off. Press the
button once to turn on the Schedule
(Residential, Commercial, Timer or Customized. that has already been
SCHEDULE
pre-programmed into your unit. Pressing the
turns the schedule function off.
button a second time
POWER Button - Turns remote and unit on and off.
SYSTEM Button - Allows the user to sequentially select, Cool
HEAT , and FAN ONLY operation. When the button is pressed, the
,
UP and DOWN Arrows - Pressing either the
(UP) or (DOWN)
button changes the desired room temperature. The factory preset lower
and upper limits are 60°F (16°C) and 99°F (37°C). These buttons are also
used to navigate between function options when using the User Menu or
Maintenance Mode.
display indicates which mode has been selected via a display message.
Note that when the heating function is not available, the system will
automatically skip the HEAT mode.
CONTINUOUS
FAN MODE Button - Selects between automatic ( AUTO FAN ) or
operation. In the
AUTO FAN
mode, the fan only turns on and off when the
Remote Effectiveness
compressor operates or the heat function is active.
Hand Held Remote - Has an operating range of up to 25 ft. The infrared
remote control signal must have a clear path to transmit the command to
the air conditioning unit. The remote signal has some ability to "bounce"
off of walls and furniture similar to a television remote control. The diagram
below shows the typical operating range of the control in a standard room
with 8 ft high ceilings.
AUTO FAN
NOTE:
is not available in the FAN ONLY Mode, the display
CONTINUOUS
CONTINUOUS
indicates
determined by your selection on the
. In the
mode, fan speed is
button.
FAN
SPEED
Figure 9
TOP VIEW
25ft
25ft
7.5ft
4ft
60°
60°
SIDE VIEW
6ft
30°
45°
60°
60°
45°
45°
8ft
25ft
30°
30°
45°
30°
16ft
8ft
25ft
25ft
25ft
25ft
25ft
FRR080
18
Figure 10
DISPLAY
AUTO FAN
CONTINUOUS
88
AUTO
C
F
SYSTEM
FAN MODE
POWER
SYSTEM
FAN MODE
POWER
TEMPERATURE
UP
TEMPERATURE
DOWN
FAN SPEED
SCHEDULE
SCHEDULE
FAN SPEED
FRR081
Figure 11
FAN ONLY
ICON
COOL
ICON
HEAT
ICON
SYSTEM
MODE
AUTO FAN
CONTINUOUS
FAN
MODE
88
AUTO
FAN
SPEED
C F
°F / °C
ICONs
SCHEDULE
ICON
FRR082
ꢆꢅ
ELECTRONIC CONTROL SEQUENCE OF OPERATION
Cooling Mode
prior to the compressor. Once the ambient temperature has been lowered to .25 ÛF below the set point, the cooling
cycle starts to terminate by shutting off the compressor. After a 30 seconds delay, the fan is shut off.
(See figure below for graphic details)
Electric Heat Operation in Cool with Electric Heat Units
When in the Heat mode, with and without Fan Mode Auto (Fan cycling):
If the indoor ambient temperature is below the Heat Demand Threshold (Heat Set Point minus 1.5 ÛF), turn on electric heat.
If Ambient is 0.3 ÛF above the Heat Set Point turn off the electric heat.
20
ELECTRONIC CONTROL SEQUENCE OF OPERATION (CONT.)
Compressor Lock Out Time
The lockout feature ensures that the compressor is de-energized for a period of time. The timer varies randomly
from 180 to 240 seconds
The compressor lockout is initiated every time the compressor is “off” due to:
(1) Satisfying the temperature set point
(2) Changing mode to fan only or heat
(3) Turning the unit off
(5) Line power is restored from a brown out condition
Wait ICON (Hour Glass )
The wait icon will be turned on when the compressor is locked out and during demand for cooling or heat pump
compressor operation. The Wait ICON will be turned off when the condition clears.
Cooling Fan Delay
Fan cycle/Auto mode only
When unit cycles cooling ON – starts the fan 5 seconds EARLY. When unit cycles cooling OFF – DELAYS the fan
off for 30 seconds
Note: this fan delay is disabled during Test Mode
Heating Fan Delay
This is only for fan Mode Auto (Fan cycles with cool/heat operation) and not for continuous fan mode. When unit
cycles Heating ON – starts the fan 5 seconds EARLY. When unit cycles Heating OFF – DELAYS the fan off for 15
seconds
Note: the fan delay is disabled during Test Mode
Fan Speed Change Delay
Relay activation is delayed by a minimum number of seconds. The default for this value is 2 seconds and is used to
eliminate relay chatter.
Fan Only System Mode
Only the Fan is turned on. Cool or Heat operation are off.
(This is different than FAN MODE CONTINUOUS where the fan is on with the cool or heat operation).
Fan Only Rules
1. If the SYSTEM FAN ONLY MODE is selected, the Auto fan mode is disabled, and the fan mode is forced to
continuous. In addition, the auto fan speed is disabled. If the user presses the fan speed key, the menu will skip over
the auto selection. The set point temperature display is off.
2. Any fan speed may be manually selected during Fan Only Mode.
21
COMPONENTS TESTING
Testing the User Interface and Relay Board
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before inspections,
maintenances, or service.
Failure to do so could result in serious injury
or death.
If the user interface does not turn on:
1. Unplug unit, remove the User Interface.
2. Replug power cord and make sure the unit has the proper voltage and that is is turned on.
3. Reconnect the user interface’s wire harness. (Ensure it is in good condition.)
4. Using a voltmeter, check for 5VDC at plug - see Image #2 and #3.
5. For room temperature thermistor’s voltage test, see Image #2.
User Interface Tests
Relay Board Test
Front
Front
Room Temperature Thermistor
Voltage Test
Ensure there is 5 VDC at User
Interface (see Image 3).
Image 1
Image 4
Back
Check here for 3.3VDC. If no
voltage or wrong voltage, replace
the User Interface.
Test for 5VDC. If no
voltage or wrong voltage,
replace relay board.
- +
Not used.
Image 2
Image 5
-
+
-
+
User Interface Voltage Test
Check here for 5VDC. If no
voltage or wrong voltage,
replace relay board. If voltage
is OK, replace User Interface.
Image 3
22
COMPONENTS TESTING (CON’T)
Testing the Relay Board
Heat Relay
For Heat & Cool Units
Goes Here
Fuse
T 3.15AH 250 Volts AC
L1
LN
Fan
High Speed
Fan
Med Speed
Fan
Low Speed
+
-
Indoor Coil
Thermistor
Outdoor Coil
Thermistor
Test here for 5VDC. If no
voltage or wrong voltage,
replace relay board.
Test for 3.3VDC. If incorrect or
no voltage, replace electronic
relay board. If voltage OK,
check thermistor’s resistance
value (See page 56).
23
COMPONENTS TESTING (Continued)
FAN MOTOR
A single phase permanent split capacitor motor is used to drive
the evaporator blower and condenser fan. A self-resetting
overload is located inside the motor to protect against high
temperature and high amperage conditions.
Many motor capacitors are internally fused. Shorting the
terminals will blow the fuse, ruining the capacitor. A 20,000
ohm 2 watt resistor can be used to discharge capacitors
safely. Remove wires from capacitor and place resistor
across terminals. When checking a dual capacitor with a
capacitor analyzer or ohmmeter, both sides must be tested.
WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.
Capacitor Check with Capacitor Analyzer
The capacitor analyzer will show whether the capacitor is
“open” or “shorted.” It will tell whether the capacitor is within
its micro farads rating and it will show whether the capacitor
is operating at the proper power-factor percentage. The
instrument will automatically discharge the capacitor when
the test switch is released.
BLOWER/FAN MOTOR - TEST
1. Determine that capacitor is serviceable.
Capacitor Connections
2. Disconnect fan motor wires from fan speed switch or
system switch.
The starting winding of a motor can be damaged by a
shorted and grounded running capacitor. This damage
usually can be avoided by proper connection of the running
capacitor terminals.
3. Apply “live” test cord probes on black wire and common
terminal of capacitor. Motor should run at high speed.
From the supply line on a typical 230 volt circuit, a 115 volt
potential exists from the “R” terminal to ground through a
possible short in the capacitor. However, from the “S” or start
terminal, a much higher potential, possibly as high as 400
volts, exists because of the counter EMF generated in the
start winding. Therefore, the possibility of capacitor failure
LVꢀPXFKꢀJUHDWHUꢀZKHQꢀWKHꢀLGHQWL¿HGꢀWHUPLQDOꢀLVꢀFRQQHFWHGꢀ
WRꢀWKHꢀ³6´ꢀRUꢀVWDUWꢀWHUPLQDOꢁꢀ7KHꢀLGHQWL¿HGꢀWHUPLQDOꢀVKRXOGꢀ
always be connected to the supply line, or “R” terminal,
never to the “S” terminal.
4. Apply “live” test cord probes on red wire and common
terminal of capacitor. Motor should run at low speed.
5. Apply “live” test cord probes on each of the remaining
wires from the speed switch or system switch to test
intermediatespeeds. Ifthecontrolisinthe“MoneySaver”
mode and the thermostat calls for cooling, the fan will
start - then stop after approximately 2 minutes; then the
fan and compressor will start together approximately 2
minutes later.
When connected properly, a shorted or grounded running
capacitor will result in a direct short to ground from the “R”
terminal and will blow the line fuse. The motor protector will
protect the main winding from excessive temperature.
Blower/Fan Motor
Dual Rated Run Capacitor Hook-up
CAPACITORS
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before servicing.
Discharge capacitor with a 20,000 Ohm 2 Watt
resistor before handling.
)DLOXUHꢀWRꢀGRꢀVRꢀPD\ꢀUHVXOWꢀLQꢀSHUVRQDOꢀLQMXU\ꢋꢀ
or death.
24
COMPONENTS TESTING (Continued)
HEATING ELEMENT
DRAIN PAN VALVE
All electric heat models are equipped with a heating element.
The EQ08 has a 1.15 KW element.
During the cooling mode of operation, condensate which
collects in the drain pan is picked up by the condenser fan
blade and sprayed onto the condenser coil. This assists
in cooling the refrigerant plus evaporating the water.
Heating Element
During the heating mode of operation, it is necessary that
water be removed to prevent it from freezing during cold
outside temperatures. This could cause the condenser
fan blade to freeze in the accumulated water and prevent
it from turning.
To provide a means of draining this water, a bellows type
drain valve is installed over a drain opening in the base
pan.
The heating element contains a fuse link and a heater limit
switch. The fuse link is in series with the power supply and
will open and interrupt the power when the temperature
UHDFKHVꢀ ꢆꢅꢅ°F or a short circuit occurs in the heating
element. Once the fuse link separates, a new fuse link
must be installed.
This valve is temperature sensitive and will open when
the outside temperature reaches 40°F. The valve will
close gradually as the temperature rises above 40°F to
fully close at 60°F.
NOTE: Always replace with the exact replacement.
The heater element has a high limit control. This control
is a bimetal thermostat mounted in the top of the heating
element.
Bellows Assembly
Drain Pan
For EQ08N11 Only
6KRXOGꢀWKHꢀIDQꢀPRWRUꢀIDLOꢀRUꢀ¿OWHUꢀEHFRPHꢀFORJJHGꢋꢀWKHꢀKLJKꢀ
limit control will open and interrupt power to the heater
before reaching an unsafe temperature condition.
The control is designed to open at 110°F ±6°F. Test
continuity below 110°F.
TESTING THE HEATING ELEMENT
WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
FRXOGꢀUHVXOWꢀLQꢀVHULRXVꢀLQMXU\ꢀRUꢀGHDWKꢁꢀ
Testing of the elements can be made with an ohmmeter
across the terminals after the connecting wires have been
removed. A cold resistance reading of approximately 10.11
ohms for the 1.15 KW heater should be registered.
25
REFRIGERATION SEQUENCE OF OPERATION
A good understanding of the basic operation of the
refrigeration system is essential for the service technician.
Without this understanding, accurate troubleshooting of
UHIULJHUDWLRQꢀV\VWHPꢀSUREOHPVꢀZLOOꢀEHꢀPRUHꢀGLI¿FXOWꢀDQGꢀWLPHꢀ
consuming, if not (in some cases) entirely impossible. The
refrigeration system uses four basic principles (laws) in its
operation they are as follows:
The refrigerant leaves the condenser Coil through the
liquid line as a warm high pressure liquid. It next will pass
through the refrigerant drier (if so equipped). It is the function
of the drier to trap any moisture present in the system,
contaminants, and large particulate matter.
The liquid refrigerant next enters the metering device. The
metering device is a capillary tube. The purpose of the
metering device is to “meter” (i.e. control or measure) the
quantity of refrigerant entering the evaporator coil.
ꢆꢁꢀꢀ³+HDWꢀDOZD\VꢀÀRZVꢀIURPꢀDꢀZDUPHUꢀERG\ꢀWRꢀDꢀFRROHUꢀꢀERG\ꢁ´ꢀ
2. “Heat must be added to or removed from a substance
before a change in state can occur”
In the case of the capillary tube this is accomplished (by
design) through size (and length) of device, and the pressure
difference present across the device.
3. “Flow is always from a higher pressure area to a lower
pressure area.”
Since the evaporator coil is under a lower pressure (due to
the suction created by the compressor) than the liquid line,
the liquid refrigerant leaves the metering device entering the
evaporator coil. As it enters the evaporator coil, the larger
area and lower pressure allows the refrigerant to expand
and lower its temperature (heat intensity). This expansion is
often referred to as “boiling”. Since the unit’s blower is moving
LQGRRUꢀDLUꢀDFURVVꢀWKHꢀ¿QQHGꢀVXUIDFHꢀRIꢀWKHꢀHYDSRUDWRUꢀFRLOꢋꢀ
the expanding refrigerant absorbs some of that heat. This
results in a lowering of the indoor air temperature, hence the
“cooling” effect.
4. “The temperature at which a liquid or gas changes state
is dependent upon the pressure.”
The refrigeration cycle begins at the compressor. Starting
the compressor creates a low pressure in the suction line
which draws refrigerant gas (vapor) into the compressor.
The compressor then “compresses” this refrigerant, raising
its pressure and its (heat intensity) temperature.
The refrigerant leaves the compressor through the discharge
Line as a hot High pressure gas (vapor). The refrigerant
enters the condenser coil where it gives up some of its
KHDWꢁꢀ7KHꢀFRQGHQVHUꢀIDQꢀPRYLQJꢀDLUꢀDFURVVꢀWKHꢀFRLO¶Vꢀ¿QQHGꢀ
surface facilitates the transfer of heat from the refrigerant to
the relatively cooler outdoor air.
The expansion and absorbing of heat cause the liquid
refrigerant to evaporate (i.e. change to a gas). Once the
refrigerant has been evaporated (changed to a gas), it is
KHDWHGꢀHYHQꢀIXUWKHUꢀE\ꢀWKHꢀDLUꢀWKDWꢀFRQWLQXHVꢀWRꢀÀRZꢀDFURVVꢀ
the evaporator coil.
:KHQꢀDꢀVXI¿FLHQWꢀTXDQWLW\ꢀRIꢀKHDWꢀKDVꢀEHHQꢀUHPRYHGꢀIURPꢀ
the refrigerant gas (vapor), the refrigerant will “condense”
(i.e. change to a liquid). Once the refrigerant has been
condensed (changed) to a liquid it is cooled even further by
WKHꢀDLUꢀWKDWꢀFRQWLQXHVꢀWRꢀÀRZꢀDFURVVꢀWKHꢀFRQGHQVHUꢀFRLOꢁꢀꢀ
The particular system design determines at exactly what
point (in the evaporator) the change of state (i.e. liquid to a
gas) takes place. In all cases, however, the refrigerant must
be totally evaporated (changed) to a gas before leaving the
evaporator coil.
The RAC design determines at exactly what point (in the
condenser) the change of state (i.e. gas to a liquid) takes
place. In all cases, however, the refrigerant must be
totally condensed (changed) to a Liquid before leaving the
condenser coil.
The low pressure (suction) created by the compressor
causes the refrigerant to leave the evaporator through the
suction line as a cool low pressure vapor. The refrigerant
then returns to the compressor, where the cycle is repeated.
Suction
Line
Discharge
Line
Condenser
Coil
Evaporator
Coil
Compressor
Metering
Device
Refrigerant Drier
Liquid
Line
Refrigerant
Strainer
26
R-410A SEALED SYSTEM REPAIR CONSIDERATIONS
WARNING
Refrigeration system under high pressure
'RꢀQRWꢀSXQFWXUHꢋꢀKHDWꢋꢀH[SRVHꢀWRꢀÀDPHꢀRUꢀLQFLQHUDWHꢁ
OQO\ꢀFHUWL¿HGꢀUHIULJHUDWLRQꢀWHFKQLFLDQVꢀVKRXOGꢀ
service this equipment.
R410A systems operate at higher pressures than
R22 equipment. Appropriate safe service and
handling practicces must be used.
Only use gauge sets designed for use with R410A.
Do not use standard R22 gauge sets.
The following is a list of important considerations when working with R-410A equipment
‡
‡
‡
R-410A pressure is approximately 60% higher than R-22 pressure.
R-410A cylinders must not be allowed to exceed 125 F, they may leak or rupture.
R-410A must never be pressurized with a mixture of air, it may become
ꢀꢀꢀꢀꢀꢀÀDPPDEOHꢁ
‡ꢀ 6HUYLFLQJꢀHTXLSPHQWꢀDQGꢀFRPSRQHQWVꢀPXVWꢀEHꢀVSHFL¿FDOO\ꢀGHVLJQHGꢀIRUꢀXVHꢀZLWKꢀ5ꢇꢉꢆꢊ$ꢀDQGꢀ
dedicated to prevent contamination.
‡
Manifold sets must be equipped with gauges capable of reading 750 psig (high side) and 200
psig (low side), with a 500-psig low-side retard.
‡
‡
Gauge hoses must have a minimum 750-psig service pressure rating
Recovery cylinders must have a minimum service pressure rating of 400 psig, (DOT 4BA400
and DOT BW400 approved cylinders).
‡
‡
POE (Polyol-Ester) lubricants must be used with R-410A equipment.
To prevent moisture absorption and lubricant contamination, do not leave the refrigeration
system open to the atmosphere longer than 1 hour.
‡
‡
‡
Weigh-in the refrigerant charge into the high side of the system.
Introduce liquid refrigerant charge into the high side of the system.
For low side pressure charging of R-410A, use a charging adaptor.
‡ꢀ 8VHꢀ)ULHGULFKꢀDSSURYHGꢀ5ꢇꢉꢆꢊ$ꢀ¿OWHUꢀGU\HUVꢀRQO\ꢁ
27
R-410A SEALED REFRIGERATION SYSTEM REPAIRS
IMPORTANT
SEALED SYSTEM REPAIRS TO COOL-ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER.
EQUIPMENT REQUIRED:
ꢅꢁꢀꢀꢀꢀꢀ+LJKꢀ3UHVVXUHꢀ*DXJHꢀꢇꢀꢍꢊꢀWRꢀꢒꢂꢊꢀOEVꢁꢎ
10. Low Pressure Gauge - (-30 to 200 lbs.)
11. Vacuum Gauge - (0 - 1000 microns)
1. Voltmeter
2. Ammeter
3. Ohmmeter
ꢆꢓꢁꢀ )DFLOLWLHVꢀIRUꢀÀRZLQJꢀQLWURJHQꢀWKURXJKꢀUHIULJHUDWLRQꢀWXELQJꢀ
4. E.P.A. Approved Refrigerant Recovery System
during all brazing processes.
5. Vacuum Pump (capable of 200 microns or less
vacuum.)
EQUIPMENT MUST BE CAPABLE OF:
6. Acetylene Welder
1. Recovering refrigerant to EPA required levels.
7. Electronic Halogen Leak Detector capable of
2. Evacuation from both the high side and low side of the
system simultaneously.
GHWHFWLQJꢀ+)&ꢀꢍ+\GURÀXRURFDUERQꢎꢀUHIULJHUDQWVꢁ
8. Accurate refrigerant charge measuring device such
as:
3. Introducing refrigerant charge into high side of the
system.
a. Balance Scales - 1/2 oz. accuracy
b. Charging Board - 1/2 oz. accuracy
4. Accurately weighing the refrigerant charge introduced
into the system.
Proper refrigerant charge is essential to proper unit operation.
Operating a unit with an improper refrigerant charge will
UHVXOWꢀLQꢀUHGXFHGꢀSHUIRUPDQFHꢀꢍFDSDFLW\ꢎꢀDQGꢌRUꢀHI¿FLHQF\ꢁꢀ
Accordingly, the use of proper charging methods during
servicing will insure that the unit is functioning as designed
and that its compressor will not be damaged.
WARNING
RISK OF ELECTRIC SHOCK
Unplug and/or disconnect all electrical power
to the unit before performing inspections,
maintenances or service.
Failure to do so could result in electric shock,
VHULRXVꢀLQMXU\ꢀRUꢀGHDWKꢁ
7RRꢀPXFKꢀUHIULJHUDQWꢀꢍRYHUFKDUJHꢎꢀLQꢀWKHꢀV\VWHPꢀLVꢀMXVWꢀDVꢀEDGꢀ
(if not worse) than not enough refrigerant (undercharge). They
both can be the source of certain compressor failures if they
remain uncorrected for any period of time. Quite often, other
SUREOHPVꢀ ꢍVXFKꢀ DVꢀ ORZꢀ DLUꢀ ÀRZꢀ DFURVVꢀ HYDSRUDWRUꢋꢀ HWFꢁꢎꢀ DUHꢀ
misdiagnosed as refrigerant charge problems. The refrigerant
circuit diagnosis chart will assist you in properly diagnosing
these systems.
WARNING
HIGH PRESSURE HAZARD
Sealed Refrigeration System contains refrigerant
and oil under high pressure.
An overcharged unit will at times return liquid refrigerant
(slugging) back to the suction side of the compressor eventually
causing a mechanical failure within the compressor. This
mechanical failure can manifest itself as valve failure, bearing
IDLOXUHꢋꢀ DQGꢌRUꢀ RWKHUꢀ PHFKDQLFDOꢀ IDLOXUHꢁꢀ 7KHꢀ VSHFL¿Fꢀ W\SHꢀ RIꢀ
IDLOXUHꢀZLOOꢀEHꢀLQÀXHQFHGꢀE\ꢀWKHꢀDPRXQWꢀRIꢀOLTXLGꢀEHLQJꢀUHWXUQHGꢋꢀ
and the length of time the slugging continues.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Failure to follow these procedures could
UHVXOWꢀLQꢀVHULRXVꢀLQMXU\ꢀRUꢀGHDWKꢁꢀ
Refrigerant Charging
Not enough refrigerant (undercharge) on the other hand,
will cause the temperature of the suction gas to increase to
WKHꢀSRLQWꢀZKHUHꢀLWꢀGRHVꢀQRWꢀSURYLGHꢀVXI¿FLHQWꢀFRROLQJꢀIRUꢀꢀWKHꢀ
compressor motor. When this occurs, the motor winding
temperature will increase causing the motor to overheat
and possibly cycle open the compressor overload protector.
Continued overheating of the motor windings and/or cycling
of the overload will eventually lead to compressor motor or
overload failure.
NOTE: Because the Kuhl Q system is a sealed system,
service process tubes will have to be installed. First install a
line tap and remove refrigerant from system. Make necessary
sealed system repairs and vacuum system. Crimp process
tube line and solder end shut. Do not leave a service valve in
the sealed system.
28
REFRIGERATION SEQUENCE OF OPERATION
A good understanding of the basic operation of the
refrigeration system is essential for the service technician.
Without this understanding, accurate troubleshooting of
UHIULJHUDWLRQꢀV\VWHPꢀSUREOHPVꢀZLOOꢀEHꢀPRUHꢀGLI¿FXOWꢀDQGꢀWLPHꢀ
consuming, if not (in some cases) entirely impossible. The
refrigeration system uses four basic principles (laws) in its
operation they are as follows:
The refrigerant leaves the condenser Coil through the
liquid line as a warm high pressure liquid. It next will pass
through the refrigerant drier (if so equipped). It is the function
of the drier to trap any moisture present in the system,
contaminants, and large particulate matter.
The liquid refrigerant next enters the metering device. The
metering device is a capillary tube. The purpose of the
metering device is to “meter” (i.e. control or measure) the
quantity of refrigerant entering the evaporator coil.
ꢆꢁꢀꢀ³+HDWꢀDOZD\VꢀÀRZVꢀIURPꢀDꢀZDUPHUꢀERG\ꢀWRꢀDꢀFRROHUꢀꢀERG\ꢁ´ꢀ
2. “Heat must be added to or removed from a substance
before a change in state can occur”
In the case of the capillary tube this is accomplished (by
design) through size (and length) of device, and the pressure
difference present across the device.
3. “Flow is always from a higher pressure area to a lower
pressure area.”
Since the evaporator coil is under a lower pressure (due to
the suction created by the compressor) than the liquid line,
the liquid refrigerant leaves the metering device entering the
evaporator coil. As it enters the evaporator coil, the larger
area and lower pressure allows the refrigerant to expand
and lower its temperature (heat intensity). This expansion is
often referred to as “boiling”. Since the unit’s blower is moving
LQGRRUꢀDLUꢀDFURVVꢀWKHꢀ¿QQHGꢀVXUIDFHꢀRIꢀWKHꢀHYDSRUDWRUꢀFRLOꢋꢀ
the expanding refrigerant absorbs some of that heat. This
results in a lowering of the indoor air temperature, hence the
“cooling” effect.
4. “The temperature at which a liquid or gas changes state
is dependent upon the pressure.”
The refrigeration cycle begins at the compressor. Starting
the compressor creates a low pressure in the suction line
which draws refrigerant gas (vapor) into the compressor.
The compressor then “compresses” this refrigerant, raising
its pressure and its (heat intensity) temperature.
The refrigerant leaves the compressor through the discharge
Line as a hot High pressure gas (vapor). The refrigerant
enters the condenser coil where it gives up some of its
KHDWꢁꢀ7KHꢀFRQGHQVHUꢀIDQꢀPRYLQJꢀDLUꢀDFURVVꢀWKHꢀFRLO¶Vꢀ¿QQHGꢀ
surface facilitates the transfer of heat from the refrigerant to
the relatively cooler outdoor air.
The expansion and absorbing of heat cause the liquid
refrigerant to evaporate (i.e. change to a gas). Once the
refrigerant has been evaporated (changed to a gas), it is
KHDWHGꢀHYHQꢀIXUWKHUꢀE\ꢀWKHꢀDLUꢀWKDWꢀFRQWLQXHVꢀWRꢀÀRZꢀDFURVVꢀ
the evaporator coil.
:KHQꢀDꢀVXI¿FLHQWꢀTXDQWLW\ꢀRIꢀKHDWꢀKDVꢀEHHQꢀUHPRYHGꢀIURPꢀ
the refrigerant gas (vapor), the refrigerant will “condense”
(i.e. change to a liquid). Once the refrigerant has been
condensed (changed) to a liquid it is cooled even further by
WKHꢀDLUꢀWKDWꢀFRQWLQXHVꢀWRꢀÀRZꢀDFURVVꢀWKHꢀFRQGHQVHUꢀFRLOꢁꢀꢀ
The particular system design determines at exactly what
point (in the evaporator) the change of state (i.e. liquid to a
gas) takes place. In all cases, however, the refrigerant must
be totally evaporated (changed) to a gas before leaving the
evaporator coil.
The RAC design determines at exactly what point (in the
condenser) the change of state (i.e. gas to a liquid) takes
place. In all cases, however, the refrigerant must be
totally condensed (changed) to a Liquid before leaving the
condenser coil.
The low pressure (suction) created by the compressor
causes the refrigerant to leave the evaporator through the
suction line as a cool low pressure vapor. The refrigerant
then returns to the compressor, where the cycle is repeated.
Suction
Line
Discharge
Line
Condenser
Coil
Evaporator
Coil
Compressor
Metering
Device
Refrigerant Drier
Liquid
Line
Refrigerant
Strainer
ꢓꢅ
R-410A SEALED REFRIGERATION SYSTEM REPAIRS
IMPORTANT
SEALED SYSTEM REPAIRS TO COOL-ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER.
EQUIPMENT REQUIRED:
ꢅꢁꢀꢀꢀꢀꢀ+LJKꢀ3UHVVXUHꢀ*DXJHꢀꢇꢀꢍꢊꢀWRꢀꢒꢂꢊꢀOEVꢁꢎ
10. Low Pressure Gauge - (-30 to 200 lbs.)
11. Vacuum Gauge - (0 - 1000 microns)
1. Voltmeter
2. Ammeter
3. Ohmmeter
ꢆꢓꢁꢀ )DFLOLWLHVꢀIRUꢀÀRZLQJꢀQLWURJHQꢀWKURXJKꢀUHIULJHUDWLRQꢀWXELQJꢀ
4. E.P.A. Approved Refrigerant Recovery System
during all brazing processes.
5. Vacuum Pump (capable of 200 microns or less
vacuum.)
EQUIPMENT MUST BE CAPABLE OF:
6. Acetylene Welder
1. Recovering refrigerant to EPA required levels.
7. Electronic Halogen Leak Detector capable of
2. Evacuation from both the high side and low side of the
system simultaneously.
GHWHFWLQJꢀ+)&ꢀꢍ+\GURÀXRURFDUERQꢎꢀUHIULJHUDQWVꢁ
8. Accurate refrigerant charge measuring device such
as:
3. Introducing refrigerant charge into high side of the
system.
a. Balance Scales - 1/2 oz. accuracy
b. Charging Board - 1/2 oz. accuracy
4. Accurately weighing the refrigerant charge introduced
into the system.
Proper refrigerant charge is essential to proper unit operation.
Operating a unit with an improper refrigerant charge will
UHVXOWꢀLQꢀUHGXFHGꢀSHUIRUPDQFHꢀꢍFDSDFLW\ꢎꢀDQGꢌRUꢀHI¿FLHQF\ꢁꢀ
Accordingly, the use of proper charging methods during
servicing will insure that the unit is functioning as designed
and that its compressor will not be damaged.
WARNING
RISK OF ELECTRIC SHOCK
Unplug and/or disconnect all electrical power
to the unit before performing inspections,
maintenances or service.
Failure to do so could result in electric shock,
VHULRXVꢀLQMXU\ꢀRUꢀGHDWKꢁ
7RRꢀPXFKꢀUHIULJHUDQWꢀꢍRYHUFKDUJHꢎꢀLQꢀWKHꢀV\VWHPꢀLVꢀMXVWꢀDVꢀEDGꢀ
(if not worse) than not enough refrigerant (undercharge). They
both can be the source of certain compressor failures if they
remain uncorrected for any period of time. Quite often, other
SUREOHPVꢀ ꢍVXFKꢀ DVꢀ ORZꢀ DLUꢀ ÀRZꢀ DFURVVꢀ HYDSRUDWRUꢋꢀ HWFꢁꢎꢀ DUHꢀ
misdiagnosed as refrigerant charge problems. The refrigerant
circuit diagnosis chart will assist you in properly diagnosing
these systems.
WARNING
HIGH PRESSURE HAZARD
Sealed Refrigeration System contains refrigerant
and oil under high pressure.
An overcharged unit will at times return liquid refrigerant
(slugging) back to the suction side of the compressor eventually
causing a mechanical failure within the compressor. This
mechanical failure can manifest itself as valve failure, bearing
IDLOXUHꢋꢀ DQGꢌRUꢀ RWKHUꢀ PHFKDQLFDOꢀ IDLOXUHꢁꢀ 7KHꢀ VSHFL¿Fꢀ W\SHꢀ RIꢀ
IDLOXUHꢀZLOOꢀEHꢀLQÀXHQFHGꢀE\ꢀWKHꢀDPRXQWꢀRIꢀOLTXLGꢀEHLQJꢀUHWXUQHGꢋꢀ
and the length of time the slugging continues.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Failure to follow these procedures could
UHVXOWꢀLQꢀVHULRXVꢀLQMXU\ꢀRUꢀGHDWKꢁꢀ
Refrigerant Charging
Not enough refrigerant (undercharge) on the other hand,
will cause the temperature of the suction gas to increase to
WKHꢀSRLQWꢀZKHUHꢀLWꢀGRHVꢀQRWꢀSURYLGHꢀVXI¿FLHQWꢀFRROLQJꢀIRUꢀꢀWKHꢀ
compressor motor. When this occurs, the motor winding
temperature will increase causing the motor to overheat
and possibly cycle open the compressor overload protector.
Continued overheating of the motor windings and/or cycling
of the overload will eventually lead to compressor motor or
overload failure.
NOTE: Because the KuhlQ system is a sealed system,
service process tubes will have to be installed. First install a
line tap and remove refrigerant from system. Make necessary
sealed system repairs and vacuum system. Crimp process
tube line and solder end shut. Do not leave a service valve in
the sealed system.
30
Method Of Charging / Repairs
The acceptable method for charging the RAC system is the
Weighed in Charge Method. The weighed in charge method is
applicable to all units. It is the preferred method to use, as it is
the most accurate.
The weighed in method should always be used whenever
a charge is removed from a unit such as for a leak repair,
compressor replacement, or when there is no refrigerant
charge left in the unit. To charge by this method, requires the
following steps:
1. Install a piercing valve to remove refrigerant from the
sealedsystem. (Piercing valve must be removed from the
system before recharging.)
2. Recover Refrigerant in accordance with EPA regulations.
WARNING
BURN HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with a torch.
Failure to follow these procedures could
UHVXOWꢀLQꢀPRGHUDWHꢀRUꢀVHULRXVꢀLQMXU\ꢁ
3. Install a process tube to sealed system.
CAUTION
FREEZE HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with liquid refrigerant.
Failure to follow these procedures could
UHVXOWꢀLQꢀPLQRUꢀWRꢀPRGHUDWHꢀLQMXU\ꢁ
4. Make necessary repairs to system.
5. Evacuate system to 200 microns or less.
6. Weigh in refrigerant with the property quantity of R410-A
refrigerant.
7. Start unit, and verify performance.
WARNING
BURN HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with a torch.
Failure to follow these procedures could
UHVXOWꢀLQꢀPRGHUDWHꢀRUꢀVHULRXVꢀLQMXU\ꢁ
8. Crimp the process tube and solder the end shut.
31
WARNING
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation.
HIGH PRESSURE HAZARD
Sealed Refrigeration System contains refrigerant
and oil under high pressure.
Extreme care must be used, if it becomes
necessary to work on equipment with power
applied.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
)DLOXUHꢀWRꢀGRꢀVRꢀFRXOGꢀUHVXOWꢀLQꢀVHULRXVꢀLQMXU\ꢀRU
death.
Failure to follow these procedures could
UHVXOWꢀLQꢀVHULRXVꢀLQMXU\ꢀRUꢀGHDWKꢁꢀ
Undercharged Refrigerant Systems
An undercharged system will result in poor performance
(low pressures, etc.) in both the heating and cooling cycle.
A check of the amperage drawn by the compressor
motor should show a lower reading. (Check the Unit
6SHFL¿FDWLRQꢁꢎꢀ ꢀ$IWHUꢀ WKHꢀ XQLWꢀ KDVꢀ UXQꢀ ꢆꢊꢀ WRꢀ ꢆꢂꢀ PLQXWHVꢋꢀ
check the gauge pressures. Gauges connected to system
with an undercharge will have low head pressures and
substantially low suction pressures.
Whenever you service a unit with an undercharge of
refrigerant, always suspect a leak. The leak must be
repaired before charging the unit.
To check for an undercharged system, turn the unit on,
allow the compressor to run long enough to establish
working pressures in the system (15 to 20 minutes).
During the cooling cycle you can listen carefully at the exit
of the metering device into the evaporator; an intermittent
hissing and gurgling sound indicates a low refrigerant
charge. Intermittent frosting and thawing of the evaporator
is another indication of a low charge, however, frosting
DQGꢀWKDZLQJꢀFDQꢀDOVRꢀEHꢀFDXVHGꢀE\ꢀLQVXI¿FLHQWꢀDLUꢀRYHUꢀ
the evaporator.
Checks for an undercharged system can be made at
the compressor. If the compressor seems quieter than
normal, it is an indication of a low refrigerant charge.
of the evaporator will not be encountered because the
refrigerant will boil later if at all. Gauges connected to
system will usually have higher head pressure (depending
upon amount of over charge). Suction pressure should be
slightly higher.
Overcharged Refrigerant Systems
Compressor amps will be near normal or higher.
Noncondensables can also cause these symptoms.
7Rꢀ FRQ¿UPꢋꢀ UHPRYHꢀ VRPHꢀ RIꢀ WKHꢀ FKDUJHꢋꢀ LIꢀ FRQGLWLRQVꢀ
improve, system may be overcharged. If conditions don’t
improve, Noncondensables are indicated.
Whenever an overcharged system is indicated, always
PDNHꢀ VXUHꢀ WKDWꢀ WKHꢀ SUREOHPꢀ LVꢀ QRWꢀ FDXVHGꢀ E\ꢀ DLUꢀ ÀRZꢀ
SUREOHPVꢁꢀ,PSURSHUꢀDLUꢀÀRZꢀRYHUꢀWKHꢀHYDSRUDWRUꢀFRLOꢀPD\ꢀ
indicate some of the same symptoms as an over charged
system.
An overcharge can cause the compressor to fail, since it
would be “slugged” with liquid refrigerant.
Thechargeforanysystemiscritical. Whenthecompressor
is noisy, suspect an overcharge, when you are sure that
the air quantity over the evaporator coil is correct. Icing
32
Restricted Refrigerant System
Troubleshooting a restricted refrigerant system can be
GLI¿FXOWꢁꢀThe following procedures are the more common
problems and solutions to these problems. There are two
types of refrigerant restrictions: Partial restrictions and
complete restrictions.
at the metering device entrance to the evaporator. The
evaporator in a partial restriction could be partially frosted
or have an ice ball close to the entrance of the metering
device. Frost may continue on the suction line back to the
compressor.
A partial restriction allows some of the refrigerant to
circulate through the system.
Often a partial restriction of any type can be found by feel,
as there is a temperature difference from one side of the
restriction to the other.
With a complete restriction there is no circulation of
refrigerant in the system.
With a complete restriction, there will be no sound at the
metering device entrance. An amperage check of the
compressor with a partial restriction may show normal
FXUUHQWꢀZKHQꢀFRPSDUHGꢀWRꢀWKHꢀXQLWꢀVSHFL¿ꢀFDWLRQꢁꢀ:LWKꢀDꢀ
complete restriction the current drawn may be considerably
less than normal, as the compressor is running in a deep
vacuum (no load.) Much of the area of the condenser will
be relatively cool since most or all of the liquid refrigerant
will be stored there.
Restricted refrigerant systems display the same symptoms
as a “low-charge condition.”
When the unit is shut off, the gauges may equalize very
slowly.
Gauges connected to a completely restricted system
will run in a deep vacuum. When the unit is shut off, the
gauges will not equalize at all.
The following conditions are based primarily on a system
in the cooling mode.
A quick check for either condition begins at the evaporator.
With a partial restriction, there may be gurgling sounds
33
COMPRESSOR CHECKS
External Overload
WARNING
ELECTRIC SHOCK HAZARD
The compressor is equipped with an external overload
which senses both motor amperage and winding tem-
perature. High motor temperature or amperage heats the
overload causing it to open, breaking the common circuit
within the compressor.
Turn off electric power before service or
installation. Extreme care must be used, if it
becomes necessary to work on equipment with
power applied.
Heat generated within the compressor shell, usually due
to recycling of the motorꢂꢀLVꢀVORZꢀWRꢀGLVVLSDWHꢁꢀ,WꢀPD\ꢀWDNHꢀꢀ
anywhere from a few minutes to several hours for the
overload to reset.
Failure to do so could result in serious injury or
death.
Locked Rotor Voltage (L.R.V.) Test
Locked rotor voltage (L.R.V.) is the actual voltage available
at the compressor under a stalled condition.
Checking the External Overload
Single Phase Connections
WARNING
Disconnect power from unit. Using a voltmeter, attach one
lead of the meter to the run “R” terminal on the compressor
and the other lead to the common “C” terminal of the com-
pressor. Restore power to unit.
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation. Extreme care must be used, if it
becomes necessary to work on equipment
with power applied.
Failure to do so could result in serious injury or
death.
Determine L.R.V.
Start the compressor with the volt meter attached; then stop
the unit. Attempt to restart the compressor within a couple
of seconds and immediately read the voltage on the meter.
The compressor under these conditions will not start and will
usually kick out on overload within a few seconds since the
pressures in the system will not have had time to equalize.
Voltage should be at or above minimum voltage of 197 VAC,
DVꢀVSHFL¿HGꢀRQꢀWKHꢀUDWLQJꢀSODWHꢁꢀ,IꢀOHVVꢀWKDQꢀPLQLPXPꢂꢀFKHFNꢀ
for cause of inadequate power supply; i.e., incorrect wire
size, loose electrical connections, etc.
WARNING
BURN HAZARD
Certain unit components operate at
temperatures hot enough to cause burns.
Proper safety procedures must be followed,
and proper protective clothing must be
worn.
Amperage (L.R.A.) Test
Failure to follow this warning could result
in moderate to serious injury.
The running amperage of the compressor is the most impor-
tant of these readings. A running amperage higher than that
indicated in the performance data indicates that a problem
exists mechanically or electrically.
With power off, remove the leads from compressor termi-
QDOVꢁꢀ,IꢀWKHꢀFRPSUHVVRUꢀLVꢀKRWꢂꢀDOORZꢀWKHꢀRYHUORDGꢀWRꢀFRROꢀ
before starting check. Using an ohmmeter, test continu-
LW\ꢀDFURVVꢀWKHꢀWHUPLQDOVꢀRIꢀWKHꢀH[WHUQDOꢀRYHUORDGꢁꢀ,Iꢀ\RXꢀ
do not have continuity; this indicates that the overload is
open and must be replaced.
Single Phase Running and L.R.A. Test
NOTE:ꢀ&RQVXOWꢀWKHꢀVSHFL¿FDWLRQꢀDQGꢀSHUIRUPDQFHꢀVHFWLRQꢀꢀ
for running amperage. The L.R.A. can also be found on the
rating plate.
Select the proper amperage scale and clamp the meter
probe around the wire to the “C” terminal of the compres-
sor. Turn on the unit and read the running amperage on
the meterꢁꢀ,IꢀWKHꢀFRPSUHVVRUꢀGRHVꢀQRWꢀVWDUWꢂꢀWKHꢀUHDGLQJꢀ
will indicate the locked rotor amperage (L.R.A.).
34
Single Phase Resistance Test
Remove the leads from the compressor terminals and set
the ohmmeter on the lowest scale (R x 1).
Many compressor failures are caused by the following
conditions:
ꢆꢁꢀꢀꢀꢀ,PSURSHUꢀDLUꢀÀRZꢀRYHUꢀWKHꢀHYDSRUDWRUꢁꢀ
Touch the leads of the ohmmeter from terminals common
to start (“C” to “S”). Next, touch the leads of the ohmmeter
from terminals common to run (“C” to “R”).
2. Overcharged refrigerant system causing liquid to be
returned to the compressor.
Add values “C” to “S” and “C” to “R” together and
check resistance from start to run terminals (“S” to “R”).
Resistance “S” to “R” should equal the total of “C” to “S”
and “C” to “R.”
3. Restricted refrigerant system.
4. Lack of lubrication.
5. Liquid refrigerant returning to compressor causing oil
to be washed out of bearings.
In a single phase PSC compressor motor, the highest
value will be from the start to the run connections (“S” to
“R”). The next highest resistance is from the start to the
common connections (“S” to “C”). The lowest resistance
is from the run to common. (“C” to “R”) Before replacing a
compressor, check to be sure it is defective.
6.
Noncondensables such as air and moisture in
the system. Moisture is extremely destructive to a
refrigerant system.
7. Defective capacitors.
GROUND TEST
Use an ohmmeter set on its highest scale. Touch one
lead to the compressor body (clean point of contact as
a good connection is a must) and the other probe in turn
to each compressor terminal. If a reading is obtained the
compressor is grounded and must be replaced.
Check the complete electrical system to the compressor
and compressor internal electrical system, check to be
certain that compressor is not out on internal overload.
Complete evaluation of the system must be made
whenever you suspect the compressor is defective. If
the compressor has been operating for sometime, a
careful examination must be made to determine why the
compressor failed.
35
COMPRESSOR REPLACEMENT
Recommendedprocedureforcompressor
replacement
3. After all refrigerant has been recovered, disconnect
suction and discharge lines from the compressor and
remove compressor. Be certain to have both suction
and discharge process tubes open to atmosphere.
WARNING
4. Carefully pour a small amount of oil from the suction
stub of the defective compressor into a clean container.
RISK OF ELECTRIC SHOCK
Unplug and/or disconnect all electrical power
to the unit before performing inspections,
maintenances or service.
5. Using an acid test kit (one shot or conventional kit), test
the oil for acid content according to the instructions
with the kit.
Failure to do so could result in electric shock,
VHULRXVꢀLQMXU\ꢀRUꢀGHDWKꢁ
6. If any evidence of a burnout is found, no matter how
slight, the system will need to be cleaned up following
proper procedures.
1. Be certain to perform all necessary electrical and
refrigeration tests to be sure the compressor is
actually defective before replacing.
7. Install the replacement compressor.
WARNING
WARNING
HIGH PRESSURE HAZARD
Sealed Refrigeration System contains refrigerant
and oil under high pressure.
EXPLOSION HAZARD
The use of nitrogen requires a pressure
regulator. Follow all safety procedures and
wear protective safety clothing etc.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Failure to follow proper safety procedures
UHVXOWꢀLQꢀVHULRXVꢀLQMXU\ꢀRUꢀGHDWKꢁꢀ
Failure to follow these procedures could
UHVXOWꢀLQꢀVHULRXVꢀLQMXU\ꢀRUꢀGHDWKꢁꢀ
8. Pressurize with a combination of R410-A and nitrogen
and leak test all connections with an electronic or
Halide leak detector. Recover refrigerant and repair
any leaks found.
2. Recover all refrigerant from the system though
the process tubes. PROPER HANDLING OF
RECOVERED REFRIGERANT ACCORDING TO
EPA REGULATIONS IS REQUIRED. Do not use
gauge manifold for this purpose if there has been
a burnout. You will contaminate your manifold and
hoses. Use a Schrader valve adapter and copper
tubing for burnout failures.
Repeat Step 8 to insure no more leaks are present.
ꢅꢁꢀꢀꢀꢀꢀꢀ(YDFXDWHꢀWKHꢀV\VWHPꢀZLWKꢀDꢀJRRGꢀYDFXXPꢀSXPSꢀFDSDEOHꢀ
RIꢀDꢀ¿QDOꢀYDFXXPꢀRIꢀꢓꢊꢊꢀPLFURQVꢀRUꢀOHVVꢁꢀ7KHꢀV\VWHP
should be evacuated through both liquid line and suction
line gauge ports. While the unit is being evacuated, seal
all openings on the defective compressor. Compressor
manufacturers will void warranties on units received not
properly sealed. Do not distort the manufacturers tube
connections.
WARNING
HIGH TEMPERATURES
([WUHPHꢀFDUHꢋꢀSURSHUꢀMXGJPHQWꢀDQGꢀDOOꢀVDIHW\ꢀ
procedures must be followed when testing,
troubleshooting, handling or working around
unit while in operation with high temperature
components. Wear protective safety aids
such as: gloves, clothing etc.
CAUTION
FREEZE HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with liquid refrigerant.
Failure to do so could result in serious burn
LQMXU\ꢁ
Failure to follow these procedures could
UHVXOWꢀLQꢀPLQRUꢀWRꢀPRGHUDWHꢀLQMXU\ꢁ
NOTICE
FIRE HAZARD
10. Recharge the system with the correct amount of
refrigerant. The proper refrigerant charge will be
found on the unit rating plate. The use of an accurate
measuring device, such as a charging cylinder,
The use of a torch requires extreme care and proper
MXGJPHQWꢁꢀ )ROORZꢀ DOOꢀ VDIHW\ꢀ UHFRPPHQGHGꢀ SUHFDXWLRQVꢀ
DQGꢀ SURWHFWꢀ VXUURXQGLQJꢀ DUHDVꢀ ZLWKꢀ ¿UHꢀ SURRIꢀ PDWHULDOVꢁꢀ
+DYHꢀDꢀ¿UHꢀH[WLQJXLVKHUꢀUHDGLO\ꢀDYDLODEOHꢁꢀ)DLOXUHꢀWRꢀIROORZꢀ
this notice could result in moderate to serious property
damage.
electronic scales or similar device is necessary.
36
SPECIAL PROCEDURE IN THE CASE OF MOTOR
COMPRESSOR BURNOUT
Available Accessories
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation.
Carbon Filter Kits
Each kit contains three (3) ¿lters.
KWCFQ - Carbon ¿lter kit for "Q" chassis models.
)DLOXUHꢀWRꢀGRꢀVRꢀPD\ꢀUHVXOWꢀLQꢀSHUVRQDOꢀLQMXU\ꢋꢀ
or death.
Window Installation Kits
(Standard in Kühl Models without Heat)
KWIKQ
WARNING
HIGH PRESSURE HAZARD
FriedrichLink™ Adapter Accessory:
KWIFI - FriedrichLink™ Adapter Accessory for wireless control and
additional programming options
Sealed Refrigeration System contains refrigerant
and oil under high pressure.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Decorative Color Front Panel Kits:
KWBGEQA - Q Model Decorative Front Cover in Classic Beige
KWBLKQA - Q Model Decorative Front Cover in Black Onyx
KWBLUQA - Q Model Decorative Front Cover in Cobalt Blue
KWPNKQA - Q Model Decorative Front Cover in Pink Diamond
KWREDQA - Q Model Decorative Front Cover in Deep Red
KWWHTQA - Q Model Decorative Front Cover in Designer White
Failure to follow these procedures could
UHVXOWꢀLQꢀVHULRXVꢀLQMXU\ꢀRUꢀGHDWKꢁꢀ
WARNING
EXPLOSION HAZARD
The use of nitrogen requires a pressure
regulator. Follow all safety procedures and
wear protective safety clothing etc.
Failure to follow proper safety procedures
UHVXOWꢀLQꢀVHULRXVꢀLQMXU\ꢀRUꢀGHDWKꢁꢀ
1.
2.
Recover all refrigerant and oil from the system.
5HPRYHꢀFRPSUHVVRUꢋꢀFDSLOODU\ꢀWXEHꢀDQGꢀ¿OWHUꢀGULHUꢀꢀ
from the system.
3.
Flush evaporator condenser and all connecting
tubing with dry nitrogen or equivalent. Use approved
ÀXVKLQJꢀDJHQWꢀWRꢀUHPRYHꢀDOOꢀFRQWDPLQDWLRQꢀIURPꢀ
system. Inspect suction and discharge line for
carbon deposits. Remove and clean if necessary.
Ensure all acid is neutralized.
4. Reassemble the system, including new drier strainer
and capillary tube.
5. Proceed with step 8-10 on previous page.
ROTARY COMPRESSOR SPECIAL TROUBLESHOOTING
AND SERVICE
Basically, troubleshooting and servicing rotary compres-
sors is the same as on the reciprocating compressor with
only one main exception:
NEVER, under any circumstances, liquid charge a rotary
compressor through the LOW side. Doing so would cause
permanent damage to the new compressor.
37
Standard Filter Cleaning / Installation Instructions
STEP 2.
STEP 3.
Figure 3
Clean the front frame by washing the dirt from the ¿lter. Use a
mild soap solution if necessary. Allow ¿lter to dry.
STEP 1.
Swing the door open and remove the ¿lter by grasping the
¿lter grip and pushing the ¿lter holder upward and outward.
Install the ¿lter back into the unit. Follow the Instructions on
the inside of the front door.
Figure 2
FILTER
DOOR
FILTER
DOOR
FILTER FRAME
INSTRUCTIONS
FRR075
FRR076
How to Remove the Front Cover
Unplug unit.
STEP 1.
Open the Decorative Front Cover, and remove the 4 screws.
Save to reinstall later.
Figure 18
UNIT COMES WITH POWER CORD
ALREADY INSTALLED AND ROUTED
TO THE LEFT SIDE
SCREWS ATTACHING DECORATIVE
FRONT COVER TO UNIT
(4 REQUIRED)
SCREW, #8 x 1/2” PHILLIPS
HEAD (SEE ILLUSTRATION
ITEM #2, PAGE 22)
2 REQUIRED (1 EACH SIDE)
FRR098
38
ROUTINE MAINTENANCE
DECORATIVE FRONT COVER
The decorative front and discharge air grille may be
cleaned with a mild soap or detergent. Do NOT use
solvents or hydrocarbon based cleaners such as
acetone, naphtha, gasoline, benzene, etc., to clean
the decorative front or air discharge grilles
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before inspections,
maintenances, or service.
Use a damp (not wet) cloth when cleaning the control
area to prevent water from entering unit, and possibly
damaging the electronic control.
Failure to do so could result in serious injury
or death.
COILS AND BASE PAN
The indoor coil (evaporator coil), the outdoor coil
(condenser coil) and base pan should be inspected
periodically (yearly or bi-yearly) and cleaned of all
debris (lint, dirt, leaves, paper, etc.). Clean the coils
and base pan with a soft brush and compressed air
or vacuum. If using a pressure washer, be careful
WARNING
EXCESSIVE WEIGHT HAZARD
Use two people to lift or carry the unit, and wear
proper protective clothing.
Failure to do so may result in personal injury.
up and down motion in the direction of the vertical
Cover all electrical components to protect them from
water or spray. Allow the unit to dry thoroughly before
reinstalling it in the sleeve.
WARNING
CUT/SEVER HAZARD
Be careful with the sharp edges and corners.
Wear protective clothing and gloves, etc.
BLOWER WHEEL / HOUSING / CONDENSER FAN /
SHROUD
Failure to do so could result in serious injury.
Inspect the indoor blower and its housing, evaporator
blade, condenser fan blade and condenser shroud
periodically (yearly or bi-yearly) and clean of all debris
(lint, dirt, mold, fungus, etc.). Clean the blower housing
area and blower wheel with an antibacterial / antifungal
cleaner. Use a biodegradable cleaning agent and
degreaser on condenser fan and condenser shroud.
Use warm or cold water when rinsing these items.
Allow all items to dry thoroughly before reinstalling
them.
NOTICE
personnel only. Use proper protection on surrounding
property. Failure to follow this notice could result in
moderate or serious property damage.
NOTICE
Do not use a caustic coil cleaning agent on coils or base
pan. Use a biodegradable cleaning agent and degreaser,
to prevent damage to the coil and/or base pan.
ELECTRONIC / ELECTRICAL / MECHANICAL
Periodically (at least yearly or bi-yearly): inspect
all control components: electronic, electrical and
mechanical, as well as the power supply. Use proper
conditioning or refrigeration thermometer to check
testing instruments (voltmeter, ohmmeter, ammeter,
wattmeter, etc.) to perform electrical tests. Use an air
room, outdoor and coil operating temperatures. Use
an electronic tester to measure wet bulb temperatures
indoors and outdoors.
To Remove, Wash and Replace Filter
Lower front panel (See Figure 2). Use handle on filter to flex
filter up and out of retainer. Remove filter from unit (See
Figure 3). Clean filter monthly or more frequently if needed.
Clean the filters with a mild detergent in warm water and
allow to dry thoroughly before reinstalling. Refer to
accessories section for filter options.
ꢈꢅ
ROUTINE MAINTENANCE (Continued)
NOTICE
Do not drill holes in the bottom of the drain pan or the
underside of the unit. Not following this notice could
result in damage to the unit or condensate water leaking
inappropriately which could cause water damage to
surrounding property.
SLEEVE / DRAIN
Inspect the sleeve and drain system periodically (at least yearly or bi-yearly) and clean of all obstructions and
debris. Clean both areas with an antibacterial and antifungal cleaner. Rinse both items thoroughly with water and
ensure that the drain outlets are operating correctly. Check the sealant around the sleeve and reseal areas as
needed.
CLEARANCES
Inspect the surrounding area (inside and outside) to ensure that the unit’s clearances have not been compromised or
altered.
Condenser
Compressor
Discharge Air
Relay Board
Key Pad and Electronic
Control Board
Sleeve
Evaporator Coil
Condenser Fan Blade
Blower Motor
Blower Wheel
Return Air
40
This is a warm weather appliance
After Maintenance/Repair Start-Up
Checklist & Notes
Your air conditioner is designed to cool in warm weather when the outside
temperature is above 60°F (15.6°C) and below 115°F (46.1°C), so it won't
cool a room if it is already cool outside.
‹
‹
‹
‹
Inspect and ensure that all components and accessories have been
installed properly and that they have not been damaged during the
installation progress.
Condensation is normal
Air conditioners actually pump the heat and humidity from your room to the
outside. Humidity becomes water, and your air conditioner will use most
of the water to keep the outside coil cool. If there is excessive humidity,
there may be excess water that will drip outside. This is normal operation.
Check the condensate water drain(s) to ensure that they are adequate
for the removal of condensate water, and that they meet the approval
of the end user.
Ensure that all installation instructions concerning clearances around
the unit have been adhered to. Check to ensure that the unit air ¿lter,
indoor coil, and outdoor coil are free from any obstructions.
Frosting
This usually occurs because of insuf¿cient airÀow across the coils, a dirty
¿lter, cool damp weather, or all of these. Set the SYSTEM mode to FAN
ONLY and the frost will disappear. Setting the thermostat a little warmer
will probably prevent the frosting from recurring.
Ensure that the circuit breaker(s) or fuse(s) and supply circuit wire
size have been sized correctly. If the unit was supplied with a power
supply cord, insure that it is stored properly.
Noises
‹
‹
‹
‹
Ensure that the entire installation is in compliance with all applicable
national and local codes and ordinances having jurisdiction.
All air conditioners make some noise. Friedrich units are designed to
operate as quietly as possible. An air conditioner mounted in a wall is quieter
than one mounted in a window. It is important to ensure that the chassis
seal gasket (Item 14) is properly installed (refer to installation instructions).
Secure components and accessories, such as a decorative front
cover.
Start the unit and check for proper operation of all components in
each mode of operation.
Instruct the owner or operator of the units operation, and the
manufacturer's Routine Maintenance.
NOTE: A log for recording the dates of maintenance and/or service is
recommended.
‹
Present the owner or operator of the equipment with the Installation
& Operation Manual, all accessory installation instructions, and the
name, address and telephone number of the Authorized Friedrich
Warranty Service Company in the area for future reference if
necessary.
41
42
How to Check the Diagnostic Codes
Erasing the Diagnostic Codes
See codes chart on next page.
F
F
AUTO FAN
AUTO FAN
SET POINT
SET POINT
FAN
SPEED
TIMER
SCHEDULE
To check the active system errors, press the
&
keys for 3 sec.
Press and hold the
and
buttons simultaneously for 3 sec.
An “E” will appear in the display. Use the
or
keys to scroll through
The “E” will blink for 3 seconds.
any system errors. Only active errors will be shown. The display error
mode will time out in 15 seconds with no key activity.
F
AUTO FAN
SET POINT
ON
After the “E” blinks for 3 seconds, the display returns to normal.
Press the
key to view the next error. Press the SELECT key to exit.
F
AUTO FAN
SET POINT
Normal display.
43
ERROR CODES
Error
Problem
Code
Control Board's Action
Continue to monitor for "OPEN" (Unstuck) switch. Do not process switch
input.
Front Panel Button Stuck For More
Than 20 Seconds
1
Input Voltage Out of Specification (103
- 127 / 187 - 253)
Indoor Temperature Sensor is Open or Set temp to 75°F in COOLING or 68°F in HEATING. Unit continues to
2
3
4
Open all relays until voltage is back within specs. Resume operation
Shorted
operate
Indoor Coil Temperature Sensor is
Open or Shorted
Control Board sets temp to a default of 40°F. Override sensor. Unit
continues to operate.
Sets temp to 20°F. Override sensor. Continue operation. Use Elec Heat if
available for HEATING. If not available use HEAT PUMP if outdoor temp
allows.
Shut down for 5 min. Resume operation for 3 min. Continues to monitor. If
test fails 3 times, the unit operation is locked out. Unplug and replug to
reset.
Outdoor Coil Temperature Sensor is
Open or Shorted
5
6
Outdoor Coil > (grater than) 175 F
Indoor Coil < (less than) 30 F for 2
consecutive minutes
Unit Cycles > (grater than) 9 Times per
hour
Unit Cycles < (less than) 3 Times per
Hour
Turn compressor off. Run High Fan speed. When coil temp reachs 45°F
resume operation after lockout time.
7
8
9
Continue operation. Continue to monitor. Take no action. Log Only.
Continue operation. Continue to monitor. Take no action. Log Only.
Only used if Electric Heat is available. Run High Speed and Electric heat
until room temp reaches 46°F. Display "FRZ" during operation. Logged
Only
Unit operates based on standard t-stat connection. If miswired, unit will not
not operate. (See pages 32 and 68)
10
11
12
Room Freeze Protection
WallStat Problem or Connection Issue
Not Applicable
Not Applicable
Not Applicable
13
Not Applicable
Discharge Air Temperature Sensor is Override Sensor. Set temp to 75°F. Continue to monitor. Set error code 14
14
15
16
17
Open or Shorted
ON.
Not Applicable
Not Applicable
Ambient temp < (less than) 0°F and ambient temp > (greater than) 130°F.
Set error code 16 ON. When cleared return unit to normal.
Temperature Beyond Operating Limits
Equipment Doesn't Meet Minimum
Configuration
Must have compressor enabled and at least 2 fan speeds
Not Applicable
Not Applicable
Not Applicable
Not Applicable
Not Applicable
Not Applicable
Not Applicable
Not Applicable
18
19
20
21
Outdoor Coil Temperature < 30 F for 2 Unit will use electric heat to satisfy heating demands until temp is greater
22
than 45°F.
consecutive Minutes
Unit must be a Heat Pump with electric heat.
23
24
Not Applicable
Not Applicable
Not Applicable
Not Applicable
Key Sequence
Action
To Access Error Codes
Press the fan speed and
ꢀ
key for 3 seconds
Reset Error Codes & Error History Press
ꢀ
+ timer/schedule for 3 seconds
ꢀ
When you have entered the Error Codes section, an “E” will appear. Use the up
Only active error codes will display.
ꢀ
and down
keys to scroll through error codes.
44
Test Mode
This function is used to test the compressor operation. By turning it on,
it allows the service technician to bypass the compressor’s 3 minute
time delay.
F
AUTO FAN
SET POINT
TIMER
SCHEDULE
FAN
MODE
FAN
SPEED
Press the
,
,
&
buttons simultaneously for 3 seconds.
This will activate the test mode.
ON
The ON icon will appear for 5 seconds and the display will then revert to
the normal display. The test mode will time out after 1 hour. To cancel
test mode, unplug and replug the power cord.
F
AUTO FAN
SET POINT
Normal display.
45
46
47
COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS
48
COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS
ꢉꢅ
COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS
50
COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS
51
HEAT / COOL ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS
* NOTE: Heater size on the EQ08M11 is: 1.15 KW.
52
ELECTRONIC CONTROLS
COOL ONLY
SQ05N10-A, SQ06N10-A, SQ08N10-A, SQ10N10-A
53
ELECTRONIC CONTROLS
COOL WITH ELECTRIC HEAT MODELS
EQ08M11-A
WIRING DIAGRAM
USER INTERFACE
INDOOR
AMBIENT
SENSOR
(WHITE)
COMPRESSOR TERMINAL
ORIENTATION MAY VARY.
REFER TO MARKINGS ON
COMPRESSOR.
OUTDOOR COIL SENSOR (BLUE)
INDOOR COIL SENSOR (GREEN)
COMPRESSOR
RELAY BOARD
SUPPLY CORD
RED
BLUE
OVLD
BLACK
LN
L1
BLACK
WHITE
BLACK
GREEN
FAN
MOTOR
TO INNER
WALL /
TO ECONTROL
BRACKET
WHITE
MOTOR
MOUNT
GREEN
WHITE
RED
ORANGE
C
CAPACITOR
RED
BROWN
BLUE
HEATER
NEUTRAL
SCHEMATIC
L1 115 VAC
HIGH
1
2
R
OVLD
MEDIUM
FAN MTR
S
FAN
CAP
COM
LOW
3
5
ELECTRIC HEAT
HL
HTR
TF
R
OVLD
COM
NO
C
COMPRESSOR
S
5
HERM
COM
ELECTRONIC CONTROL
CAP
L E G E N D
- THERMISTER
T
CAP
COMPR
- CAPACITOR
- COMPRESSOR
- COMBINATION TERMINAL
- GROUNDED LEAD SYMBOL
- INSULATOR
- FAN MOTOR
MTR
OLP
UI
- OVERLOAD PROTECTOR
- USER INTERFACE
- THERMAL FUSE
TF
HL
- HEATER LIMIT FUSE
PART NO.
92120002
REV.
01
54
THERMISTORS’ RESISTANCE VALUES
(This Table Applies to All Thermistors)
TEMP
(F)
RESISTENCE
(K Ohms)
TEMP
(F)
RESISTENCE
(K Ohms)
0
5
56.4452
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
9.2133
49.6839
43.8591
38.8118
34.4303
30.6103
29.9068
29.2218
28.5546
27.9048
27.2717
26.6550
26.0540
25.4698
24.9004
24.3454
23.8044
23.2770
22.7628
22.2615
21.7726
19.5068
17.5040
14.1607
12.7641
12.5036
12.2490
12.0000
11.7573
11.5199
11.2879
11.0611
10.8392
10.6223
10.4103
10.2029
10.0000
9.7965
9.0275
8.8459
8.6683
8.4947
8.3250
8.1593
7.9973
7.8388
7.6839
7.5324
7.3841
7.2391
7.0973
6.9586
6.8232
6.6906
6.5610
6.4341
6.3100
6.1885
6.0696
5.9533
5.8395
5.7283
5.6195
5.5129
5.4087
5.3065
5.2066
5.1088
5.0130
4.9192
4.8276
4.7378
4.6500
4.5639
4.4796
4.3971
4.3163
10
15
20
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
45
50
60
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
9.5977
9.4033
55
56
57
HEAT LOAD FORM
The heat load form on the following page may be used by
Following is an example using the heat load form:
servicingpersonneltodeterminetheheatlossofaconditioned
space and the ambient winter design temperatures in which
the unit will heat the calculated space.
A space to be conditioned is part of a house geographically
located in an area where the lowest outdoor ambient winter
temperature is 40°F. The calculated heat loss is 184 BTU/
Hr./°F.
The upper half of the form is for computing the heat loss of
the space to be conditioned. It is necessary only to insert
the proper measurements on the lines provided and multiply
by the given factors, then add this result for the total heat
loss in BTU/Hr./°F.
Subtract 40°F (lowest outdoor ambient temperature for the
geographical location) from 70°F (inside design temperature
of the unit) for a difference of 30°F. Multiply 184 by 30 for a
5500 BTU/Hr. total heat loss for the calculated space.
The BTU/Hr. per °F temperature difference is the 70°F
inside winter designed temperature minus the lowestoutdoor
ambient winter temperature of the area where the unit is
installed. This temperature difference is used asthe multiplier
when calculating the heat loss.
On the graph, plot the base point (70°) and a point on the
40°F line where it intersects with the 5500 BTU/Hr. line on
the left scale. Draw a straight line from the base point 70
through the point plotted at 40°F. This is the total heat loss
line.
The graph shows the following:
Knowing that we have a 5500 BTU/Hr. heat loss, and
we expect that our heat pump will maintain a 70°F inside
temperature at 40°F outdoor ambient, we plot the selected
unit capacity BTU/Hr. of the unit between 35° and 60° on the
graph and draw a straight line between these points. Where
the total heat loss line and the unit capacity line intersect,
read down to the outdoor ambient temperature scale and
¿nd that this unit will deliver the required BTU/Hr. capacity
to approximately 30°F.
Left Hand Scale
Unit capacity BTU/Hr. or heat loss
BTU/Hr.
Bottom Scale
Outdoor ambient temperature, base
point.
Heat Pump Model
Balance Point
BTU/Hr. capacity heat pump will
deliver at outdoor temperatures.
Maximum BTU/Hr. heat pump
will deliver at indicated ambient
temperature.
58
HEATING LOAD FORM
FRIEDRICH ROOM UNIT HEAT PUMPS
BTU/HR PER
WALLS: (Linear Feet)
2” Insulation
°F TEMP. DIFFERENCE
Lin. Ft. x 1.6
Average
Lin. Ft. x 2.6
WINDOWS & DOORS (Area, sq. ft.)
Single Glass:
Sq. Ft. x 1.13
Sq. Ft. x 0.61
Double Glass:
INFILTRATION - WINDOWS & DOORS: AVG.
Lin. Ft. x 1.0
Lin. Ft. x 2.0
Loose
CEILING: (Area, Sq. Ft.)
Insulated (6”)
Sq. Ft. x 0.07
Sq. Ft. x 0.10
Sq. Ft. x 0.10
Sq. Ft. x 0.20
Sq. Ft. x 0.33
Insulated (2”)
Built-up Roof (2” insulated
Built-up Roof (1/2” insulated)
No Insulation
FLOOR: (Area, Sq. Ft.)
Above Vented Crawl space
Insulated (1:)
Sq. Ft. x 0.20
Sq. Ft. x 0.50
Uninsulated
* Slab on Ground
Lin. Ft. x 1.70
1” Perimeter insulation
* Based on Linear Feet of outside wall
Lin. Ft. x 1.00
TOTAL HEAT LOSS PER °F BTU/HR/°F
Multiply total BTU/HR/°F X 30 and plot on the graph below at 40°F. Draw a straight line from
the 70 base point thru the point plotted at 40°F. The intersection of this heat loss line with the
unit capacity line represents the winter design heating load.
ꢂꢅ
Kühl-Q Chassis 2012 Parts List
60
Kühl-Q Units’ 2012 Parts List
33
32
27
29
30
31
28
32
61
Kühl Q-Chassis Service Parts List
Item #
1
COMPONENT
61600523
61600522
61600274
61600275
61718107
61718109
61718112
62601028
62601030
62601024
62601023
61764594
61764601
61764605
61871451
61871468
61871501
61929611
60500500
61923901
61928801
61924300
61990700
61990701
60610604
60610606
61990606
61990500
61627601
61634001
61634000
61597317
61597318
61776903
61776900
61619517
91400402
61028900
61028901
61028903
61626312
61626313
61626314
61638400
61825725
61627212
61627314
62400437
62400726
61680205
61717300
61619405
61715800
60179904
60062720
61080530
61080532
61080594
62601029
61818523
60169120
62601027
03760545
03760568
03760513
61834800
61828202
60217902
01900235
01109003
COMPONENT DESCRIPTION
EQ08N11-A
1
SQ05N10-A
SQ06N10-A
SQ08N10-A
1
SQ10N10-A
1
CONDENSOR COIL
CONDENSOR COIL
1
1
1
1
1
2
EVAPORATOR COIL
1
2
EVAPORATOR COIL
1
1
1
1
3
KIT COMPR REPLMT 62200118
KIT COMPR REPLMT 62200007
KIT COMPR REPLMT 62200006
KIT USER INTERFACE RPLMNT SVC KUHL SQ
KIT USER INTERFACE RPLMNT SVC KUHL EQ
KIT E-CNTL SERV COOL-EH 3SP KUHL Q
KIT E-CNTL SERV COOL 3SP KUHL Q
OVERLOAD PROTECTOR B400-150-241A FSTB
OVERLOAD PROTECTOR B260-150-241E/MRA12335-12026
OVERLOAD PROTECTOR MRA12230-12008
FAN MOTOR
3
1
1
3
1
1
1
1
4
1
4
1
1
5
5
1
1
1
1
1
1
6
6
1
6
1
1
1
1
7
7
FAN MOTOR
1
7
FAN MOTOR
1
1
1
1
1
1
1
8
HEATER 1.15 KW @ 115V (NXT WIRE)
SUPPLY CORD
9
1
1
1
1
1
1
1
1
10
11
12
13
14
15
15
16
17
18
19
19
20
20
21
21
22
23
24
24
24
25
25
25
26
27
28
29
30
31
32
33
*
BRKT CONTROL MNTG XQ
PANEL BLWR FRONT EQ 2003
PANEL, L/S EQ/XQ
1
1
1
1
1
1
1
1
1
1
1
1
1
1
BLOWER FRONT, Q 2003
TOP BLOWER FRONT
1
1
BLOWER WHEEL
BLOWER WHEEL
1
1
1
1
1
1
1
1
1
1
SCROLL Q CHASSIS
1
1
1
1
1
1
1
1
1
1
DECK, EVAP Q CHASSIS
SHROUD 'Q'
CONDENSOR FAN
CONDENSOR FAN
1
1
1
1
INNERWALL XQ
1
1
1
1
INNERWALL EQ
FAN MOTOR BRACKET
FAN MOTOR BRACKET
1
1
3
1
1
3
1
1
3
COVER TOP Q-CHASSIS VENTED
COMPRESSOR STUD
1
3
3
1
3
3
COMPRESSOR GROMMET
COMPRESSOR GROMMET
COMPRESSOR GROMMET
BASEPAN Q-CHASSIS
3
1
3
3
1
1
1
BASEPAN Q-CHASSIS
BASEPAN Q-CHASSIS
1
1
1
1
DRAIN PAN
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
ASSY OUTER SHELL KUHL Q REPLMT 2012
CHANNEL SILL SQ
SUPPORT TOP SQ
ASSY KIT DECORATIVE FRONT SVC KUHL Q
ASSY FILTER MESH Q
1
1
ASSY CURTAIN AND FRAME Q
GASKET CHASSIS SEAL (UV RES)Q
DECK (EQ08)
1
1
2
1
1
*
COUNTER WEIGHT
2
2
2
1
1
2
1
*
CONDENSATE DRAIN VALVE
STRAP CAPACITOR
*
1
1
1
1
*
CAPACITOR 40/5/ MF 370V 2.0
CAPACITOR 45/7.5 MF 370V 2.0
CAPACITOR 55/7.5 MF 370V 2.0
KIT REMOTE CONTROL RPLMNT SVC KUHL
EXPANDED METAL GRILLE PAINTED KUHLQ
SCRIPT FRIEDRICH 2010 "FESTOON"
KIT SENSOR RPLMNT SVC KUHL Q (THERMISTOR SET)
CAPILLARY TUBE
*
1
*
1
1
1
1
1
*
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
*
*
*
*
*
CAPILLARY TUBE
1
*
CAPILLARY TUBE
1
1
1
1
1
1
1
1
*
STRAINER .312 COIL
1
1
1
1
1
1
1
1
1
*
LIQUID DRIER
*
SEAL FAN MOTOR TO INNER WALL
DC-2 DRAIN KIT
*
*
TOUCH UP SPRAY PAINT (12 OZ)
ꢀꢁ
Addendum 1
Schedule Table with Energy Saving Values
Pre Programmed Residential Schedule Option 3
Period
1
Sun
Start Time
System Mode
Fan Mode
Mon
600 Start Time
Cool System Mode
Auto Fan Mode
Low Fan Speed
Tues
600 Start Time
Cool System Mode
Auto Fan Mode
Low Fan Speed
Wed
600 Start Time
Cool System Mode
Auto Fan Mode
Low Fan Speed
Thur
600 Start Time
Cool System Mode
Auto Fan Mode
Low Fan Speed
Fri
Sat
600 Start Time
Cool System Mode
Auto Fan Mode
Low Fan Speed
600 Start Time
600
Cool
Auto
Low
Cool System Mode
Auto Fan Mode
Low Fan Speed
Fan Speed
Set Point Cool 78
Set Point Heat 70
Set Point Cool 78
Set Point Heat 70
800 Start Time
Set Point Cool 78
Set Point Heat 70
800 Start Time
Set Point Cool 78
Set Point Heat 70
800 Start Time
Set Point Cool 78
Set Point Heat 70
800 Start Time
Set Point Cool 78
Set Point Heat 70
800 Start Time
Set Point Cool 78
Set Point Heat 70
Start Time
System Mode
Fan Mode
800 Start Time
800
Cool System Mode
Auto Fan Mode
Low Fan Speed
Cool System Mode
Auto Fan Mode
Low Fan Speed
Cool System Mode
Auto Fan Mode
Low Fan Speed
Cool System Mode
Auto Fan Mode
Low Fan Speed
Cool System Mode
Auto Fan Mode
Low Fan Speed
Cool System Mode
Auto Fan Mode
Low Fan Speed
Cool
Auto
Low
2
3
4
Fan Speed
Set Point Cool 85
Set Point Heat 62
Set Point Cool 85
Set Point Heat 62
1800 Start Time
Set Point Cool 85
Set Point Heat 62
1800 Start Time
Set Point Cool 85
Set Point Heat 62
1800 Start Time
Set Point Cool 85
Set Point Heat 62
1800 Start Time
Set Point Cool 85
Set Point Heat 62
1800 Start Time
Set Point Cool 85
Set Point Heat 62
Start Time
System Mode
Fan Mode
1800 Start Time
1800
Cool
Auto
Low
Cool System Mode
Auto Fan Mode
Low Fan Speed
Cool System Mode
Auto Fan Mode
Low Fan Speed
Cool System Mode
Auto Fan Mode
Low Fan Speed
Cool System Mode
Auto Fan Mode
Low Fan Speed
Cool System Mode
Auto Fan Mode
Low Fan Speed
Cool System Mode
Auto Fan Mode
Low Fan Speed
Fan Speed
Set Point Cool 78
Set Point Heat 70
Set Point Cool 78
Set Point Heat 70
2200 Start Time
Set Point Cool 78
Set Point Heat 70
2200 Start Time
Set Point Cool 78
Set Point Heat 70
2200 Start Time
Set Point Cool 78
Set Point Heat 70
2200 Start Time
Set Point Cool 78
Set Point Heat 70
2200 Start Time
Set Point Cool 78
Set Point Heat 70
Start Time
System Mode
Fan Mode
2200 Start Time
2200
Cool
Auto
Low
Cool System Mode
Auto Fan Mode
Low Fan Speed
Cool System Mode
Auto Fan Mode
Low Fan Speed
Cool System Mode
Auto Fan Mode
Low Fan Speed
Cool System Mode
Auto Fan Mode
Low Fan Speed
Cool System Mode
Auto Fan Mode
Low Fan Speed
Cool System Mode
Auto Fan Mode
Low Fan Speed
Fan Speed
Set Point Cool 82
Set Point Heat 62
Set Point Cool 82
Set Point Heat 62
Set Point Cool 82
Set Point Heat 62
Set Point Cool 82
Set Point Heat 62
Set Point Cool 82
Set Point Heat 62
Set Point Cool 82
Set Point Heat 62
Set Point Cool 82
Set Point Heat 62
Pre Programmed Commercial Schedule Option 3
Period
1
Sun
Mon
700 Start Time
Cool System Mode
Auto Fan Mode
Med Fan Speed
Tues
700 Start Time
Cool System Mode
Auto Fan Mode
Med Fan Speed
Wed
700 Start Time
Cool System Mode
Auto Fan Mode
Med Fan Speed
Thur
700 Start Time
Cool System Mode
Auto Fan Mode
Med Fan Speed
Fri
Sat
Start Time
System Mode
Fan Mode
700 Start Time
700 Start Time
700
Cool System Mode
Auto Fan Mode
Med Fan Speed
Cool System Mode
Auto Fan Mode
Med Fan Speed
Cool
Auto
Med
Fan Speed
Set Point Cool 84
Set Point Heat 62
Set Point Cool 75
Set Point Heat 70
1800 Start Time
Set Point Cool 75
Set Point Heat 70
1800 Start Time
Set Point Cool 75
Set Point Heat 70
1800 Start Time
Set Point Cool 75
Set Point Heat 70
1800 Start Time
Set Point Cool 75
Set Point Heat 70
1800 Start Time
Set Point Cool 84
Set Point Heat 62
Start Time
System Mode
Fan Mode
1800 Start Time
1800
Cool
Auto
Med
Cool System Mode
Auto Fan Mode
Med Fan Speed
Cool System Mode
Auto Fan Mode
Med Fan Speed
Cool System Mode
Auto Fan Mode
Med Fan Speed
Cool System Mode
Auto Fan Mode
Med Fan Speed
Cool System Mode
Auto Fan Mode
Med Fan Speed
Cool System Mode
Auto Fan Mode
Med Fan Speed
2
Fan Speed
Set Point Cool 84
Set Point Heat 62
Set Point Cool 84
Set Point Heat 62
Set Point Cool 84
Set Point Heat 62
Set Point Cool 84
Set Point Heat 62
Set Point Cool 84
Set Point Heat 62
Set Point Cool 84
Set Point Heat 62
Set Point Cool 84
Set Point Heat 62
63
Friedrich Air Conditioning Company
10001 Reunion Place, Suite 500
San Antonio, TX 78216
1-800-541-6645
ROOM AIR CONDITIONERS
LIMITED WARRANTY
FIRST YEAR
ANY PART: If any part supplied by FRIEDRICH fails because of a defect in workmanship or material within twelve months from date of original
purchase, FRIEDRICH will repair the product at no charge, provided room air conditioner is reasonably accessible for service. Any additional labor
cost for removing inaccessible units and/or charges for mileage related to travel by a Service Agency that exceeds 25 miles one way will be the
responsibility of the owner. This remedy is expressly agreed to be the exclusive remedy within twelve months from the date of the original purchase.
SECOND THROUGH FIFTH YEAR
SEALED REFRIGERANT SYSTEM:
because of a defect in workmanship or material within sixty months from date of purchase, FRIEDRICH will pay a labor allowance and parts
necessary to repair the Sealed Refrigeration System; PROVIDED FRIEDRICH will not pay the cost of diagnosis of the problem, removal, freight
charges, and transportation of the air conditioner to and from the Service Agency, and the reinstallation charges associated with repair of the
Sealed Refrigeration System. All such cost will be the sole responsibility of the owner. This remedy is expressly agreed to be the exclusive remedy
within sixty months from the date of the original purchase.
APPLICABILITY AND LIMITATIONS: This warranty is applicable only to units retained within the Fifty States of the U.S.A., District of Columbia,
and Canada. This warranty is not applicable to:
1.
A
2. Products on which the model and serial numbers have been removed.
3. Products which have defects or damage which results from improper installation, wiring, electrical current characteristics, or
installed in a corrosive atmosphere, default or delay in performance caused by war, government restrictions or restraints, strikes,
material shortages beyond the control of FRIEDRICH, or acts of God.
OBTAINING WARRANTY PERFORMANCE: Service will be provided by the FRIEDRICH Authorized Dealer or Service Organization in your
above for contact information.
LIMITATIONS: THIS WARRANTY IS GIVEN IN LIEU OF ALL OTHER WARRANTIES. Anything in the warranty notwithstanding, ANY
IMPLIED WARRANTIES OF FITNESS FOR PARTICULAR PURPOSE AND/OR MERCHANTABILITY SHALL BE LIMITED TO THE DURATION
OF THIS EXPRESS WARRANTY. MANUFACTURER EXPRESSLY DISCLAIMS AND EXCLUDES ANY LIABILITY FOR CONSEQUENTIAL
OR INCIDENTAL DAMAGE FOR BREACH OF ANY EXPRESSED OR IMPLIED WARRANTY.
Performance of Friedrich’s Warranty obligation is limited to one of the following methods:
1. Repair of the unit
2. A refund to the customer for the prorated value of the unit based upon the remaining warranty period of the unit.
3. Providing a replacement unit of equal value
NOTE: Some states do not allow limitations on how long an implied warranty lasts, or do not allow the limitation or exclusion of consequential or
incidental damages, so the foregoing exclusions and limitations may not apply to you.
OTHER:
PROOF OF PURCHASE: Owner must provide proof of purchase in order to receive any warranty related services.
All service calls for explaining the operation of this product will be the sole responsibility of the consumer.
All warranty service must be provided by an Authorized FRIEDRICH Service Agency, unless authorized by FRIEDRICH prior to repairs being made.
(10-08)
64
CUSTOMER SATISFACTION and QUALITY ASSURANCE
Friedrich is a conscientious manufacturer, concerned about customer satisfaction, product quality, and
controlling warranty costs.As anAuthorized Service Provider you play a vital role in these areas. By adhering
to the policies and procedures you provide us with vital information on each warranty repair you complete.
This information is used to identify product failure trends, initiate corrective action, and improve product
quality, thereby further reducing warranty expenses while increasing customer satisfaction levels.
FRIEDRICH AUTHORIZED PARTS DEPOTS
AAA Refrigeration Service
1322 24th Street, Suite B
Kenner, Louisiana 70062
504-464-7444
The Gabbert Company
6868 Ardmore
Houston, Texas 77054
713-747-4110
Reeve Air Conditioning, Inc.
2501 South Park Road
Hallandale, Florida 33009
954-962-0252
877-813-7444
800-458-4110
800-962-3383
Alamo Service Company
1450 North Flores Street
San Antonio, Texas 78212
210-227-2450
Johnstone Supply of Woodside Valley of the Sun
27-01 Brooklyn Queens Expway
Woodside, New York 11377
718-545-5464
4710 W. Dewey Drive
Las Vegas, NV 89118
702-547-4900
800-328-2450
800-431-1143
866-259-8500
A/C Warehouse
670 Avahl Street
Honolulu, Hi 96813
808-545-3084
International Parts Depot
Traco Corp.
380 Paterson Road
Carlstadt, NJ 07072
201-939-1600
TECHNICAL SUPPORT
CONTACT INFORMATION
FRIEDRICH AIR CONDITIONING CO.
10001 Reunion Place, Ste. 500, San Antonio, TX 78216
(210) 546-0500 877-599-5665 x 261 FAX (210) 546-0630
Email: tac@friedrich.com
Printed in the U.S.A.
Kuhl Q-Serv/PartsMan (5-12)
65
FRIEDRICH AIR CONDITIONING CO.
10001 Reunion Place, Ste. 500, San Antonio, TX 78216
P 210-546-0500 | F 210-546-0731
Printed in the U.S.A.ꢀꢀ
KuhlQ-Serv/PartsMan (5-12)
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