Sanyo Cl2462r User Manual

TECHNICAL DATA  
&
SERVICE MANUAL  
FILE NO.  
KS2462R / C2462R, CL2462R  
SPLIT SYSTEM AIR CONDITIONER  
INDOOR MODEL No.  
PRODUCT CODE No.  
OUTDOOR MODEL No.  
C2462R  
PRODUCT CODE No.  
854 019 01  
KS2462R  
854 019 00  
CL2462R  
854 019 02  
Indoor Unit  
Outdoor Unit  
KS2462R  
C2462R  
CL2462R  
REFERENCE NO. SM830092  
854648419200  
Table of Contents  
1. OPERATING RANGE ....................................................................................... 4  
2. SPECIFICATIONS ............................................................................................ 5  
(1) Unit Specifications ...................................................................................... 5  
(2) Major Component Specifications ................................................................ 7  
(A) Indoor Unit ............................................................................................ 7  
(B) Outdoor Unit.......................................................................................... 8  
(3) Other Component Specifications .............................................................. 10  
(A) Indoor Unit .......................................................................................... 10  
(B) Outdoor Unit........................................................................................ 12  
3. DIMENSIONAL DATA..................................................................................... 13  
(1) Indoor Unit ................................................................................................ 13  
(2) Outdoor Unit.............................................................................................. 14  
4. COOLING CAPACITY..................................................................................... 15  
5. PERFORMANCE CHARTS ............................................................................ 17  
(1) Operating Current ..................................................................................... 17  
(2) High and Low Pressure............................................................................. 19  
6. AIR THROW DISTANCE CHART ................................................................... 21  
7. REFRIGERANT FLOW DIAGRAM ................................................................. 22  
8. INSTALLATION INSTRUCTIONS .................................................................. 23  
9. ELECTRICAL DATA ....................................................................................... 29  
10. ELECTRICAL WIRING DIAGRAMS ............................................................... 30  
(1) Indoor Unit ................................................................................................ 30  
(2) Outdoor Unit.............................................................................................. 31  
11. PROCESSES AND FUNCTIONS.................................................................. 35  
(1) Room Temperature Control ...................................................................... 35  
(2) Dry Operation............................................................................................ 36  
(3) Freeze Prevention..................................................................................... 37  
(4) Outdoor Fan Speed Control ...................................................................... 38  
12. SERVICE PROCEDURES .............................................................................. 39  
(1) Troubleshooting ........................................................................................ 39  
(2) A Sensor is Defective................................................................................ 50  
(3) Checking the Electrical Components ........................................................ 51  
SM830092  
– 3 –  
1. OPERATING RANGE  
KS2462R / C2462R  
Temperature  
Indoor Air Intake Temp. Outdoor Air Intake Temp.  
Maximum  
Minimum  
95 °F DB / 71 °F WB  
67 °F DB / 57 °F WB  
115 °F DB  
67 °F DB  
KS2462R / CL2462R  
Temperature  
Indoor Air Intake Temp. Outdoor Air Intake Temp.  
Maximum  
Minimum  
95 °F DB / 71 °F WB  
67 °F DB / 57 °F WB  
115 °F DB  
0 °F DB  
SM830092  
– 4 –  
2. SPECIFICATIONS  
1-1 Unit Specifications  
KS2462R  
C2462R  
MODEL No.  
Indoor Unit  
Outdoor Unit  
POWER SOURCE  
PERFORMANCE  
Capacity  
230 - 208 V / 1 Phase / 60 Hz  
Cooling  
27,000  
26,000  
7.619  
519  
BTU / h  
kW  
7.912  
559  
Air circulation (Hi)  
Moisture removal (High)  
ELECTRICAL RATINGS  
Voltage rating  
Cu.ft. / min.  
Pints / h  
6.5  
6.4  
VAC  
230  
208  
Available voltage range  
Running amperes*  
Max. running amperes**  
Power input  
Power factor  
S.E.E.R  
187 – 253  
VAC  
A
A
W
10.2  
12.5  
2,240  
95.5  
13.0  
61  
10.9  
13.5  
2,200  
97.0  
13.0  
61  
%
BTU / Wh  
A
Max. starting amperes  
FEATURES  
Controls  
Microprocessor  
Timer  
ON/OFF 24-hours & Program  
3 and Automatic control / 2 (Auto)  
– / Automatic  
Fan speed Indoor / Outdoor  
Air deflection  
Horizontal / Vertical  
Air filter  
Washable, easy access  
RCS - 1PS4U - G  
Capillary tube  
Remote controller (Accessory)  
Refrigerant control  
Refrigerant tubing connections  
Compressor  
Flare type  
Scroll  
Operation sound  
Indoor - Hi/Me/Lo dB - A  
Outdoor - Hi  
48 / 42 / 38  
dB - A  
55  
REFRIGERANT TUBING  
Limit of tubing length  
ft.  
ft.  
ft.  
(m)  
(m)  
(m)  
132 ( 40 )  
23 ( 7 )  
Limit of tubing length at shipment  
Limit of elevation difference  
between the two units  
50 ( 15 )  
Refrigerant tube  
outer diameter  
Refrigerant amount at shipment  
Narrow tube  
Wide tube  
3 / 8 (9.52)  
3 / 4 (19.05)  
R410A - 6.6 (3)  
in. (mm)  
in. (mm)  
lbs. (kg)  
DIMENSIONS & WEIGHT  
Indoor unit  
Outdoor unit  
13  
(330)  
(1,140)  
(228)  
(325)  
(406)  
(406)  
(18)  
36-5/8  
(930)  
(940)  
(340)  
(1,010)  
(1,000)  
(400)  
(68)  
(86.5)  
(0.40)  
Unit dimensions  
Height  
in. (mm)  
in. (mm)  
in. (mm)  
in. (mm)  
in. (mm)  
in. (mm)  
lbs. (kg)  
lbs. (kg)  
cu. ft.(m3)  
Width  
Depth  
Height  
Width  
Depth  
44-7/8  
8-31/32  
12-25/32  
48-15/32  
15-31/32  
40  
37  
13-3/8  
39-3/4  
39-3/8  
15-3/4  
150  
Package dimensions  
Net weight  
Shipping weight  
Shipping volume  
44  
5.7  
(20)  
(0.162)  
190  
14.1  
DATA SUBJECT TO CHANGE WITHOUT NOTICE.  
Cooling:  
Rating conditions (*) : Indoor air temperature 80 °F DB / 67 °F WB, Outdoor air temperature 95 °F DB / 75°F WB  
Full load conditions (**): Indoor air temperature 80 °F DB / 67 °F WB, Outdoor air temperature 115°F DB  
SM830092  
– 5 –  
2. SPECIFICATIONS  
1-1 Unit Specifications  
KS2462R  
CL2462R  
MODEL No.  
Indoor Unit  
Outdoor Unit  
POWER SOURCE  
PERFORMANCE  
Capacity  
230 - 208 V / 1 Phase / 60 Hz  
Cooling  
27,000  
26,000  
7.619  
519  
BTU / h  
kW  
7.912  
559  
Air circulation (Hi)  
Moisture removal (High)  
ELECTRICAL RATINGS  
Voltage rating  
Cu.ft. / min.  
Pints / h  
6.5  
6.4  
VAC  
230  
208  
Available voltage range  
Running amperes*  
Max. running amperes**  
Power input  
Power factor  
S.E.E.R  
187 – 253  
VAC  
A
A
W
10.2  
12.5  
2,240  
95.5  
13.0  
61  
10.9  
13.5  
2,200  
97.0  
13.0  
61  
%
BTU / Wh  
A
Max. starting amperes  
FEATURES  
Controls  
Microprocessor  
Timer  
1-hour OFF, ON/OFF 12-hours & Program  
Fan speed Indoor / Outdoor  
Air deflection  
3 and Automatic control / 3 (Auto)  
– / Automatic  
Horizontal / Vertical  
Air filter  
Washable, easy access  
RCS - 1PS4U - G  
Capillary tube  
Flare type  
Remote controller (Accessory)  
Refrigerant control  
Refrigerant tubing connections  
Compressor  
Scroll  
Operation sound  
Indoor - Hi/Me/Lo dB - A  
Outdoor - Hi  
48 / 42 / 38  
dB - A  
55  
REFRIGERANT TUBING  
Limit of tubing length  
ft.  
ft.  
ft.  
(m)  
(m)  
(m)  
132 ( 40 )  
23 ( 7 )  
Limit of tubing length at shipment  
Limit of elevation difference  
between the two units  
50 ( 15 )  
Refrigerant tube  
outer diameter  
Refrigerant amount at shipment  
Narrow tube  
Wide tube  
3 / 8 (9.52)  
3 / 4 (19.05)  
R410A - 6.6 (3)  
in. (mm)  
in. (mm)  
lbs. (kg)  
DIMENSIONS & WEIGHT  
Indoor unit  
Outdoor unit  
13  
(330)  
(1,140)  
(228)  
(325)  
(406)  
(406)  
(18)  
36-5/8  
(930)  
(940)  
(340)  
(1,010)  
(1,000)  
(400)  
(68)  
(86.5)  
(0.40)  
Unit dimensions  
Height  
in. (mm)  
in. (mm)  
in. (mm)  
in. (mm)  
in. (mm)  
in. (mm)  
lbs. (kg)  
lbs. (kg)  
cu. ft.(m3)  
Width  
Depth  
Height  
Width  
Depth  
44-7/8  
8-31/32  
12-25/32  
48-15/32  
15-31/32  
40  
37  
13-3/8  
39-3/4  
39-3/8  
15-3/4  
150  
Package dimensions  
Net weight  
Shipping weight  
Shipping volume  
44  
5.7  
(20)  
(0.162)  
190  
14.1  
DATA SUBJECT TO CHANGE WITHOUT NOTICE.  
Cooling:  
Rating conditions (*) : Indoor air temperature 80 °F DB / 67 °F WB, Outdoor air temperature 95 °F DB / 75°F WB  
Full load conditions (**): Indoor air temperature 80 °F DB / 67 °F WB, Outdoor air temperature 115°F DB  
SM830092  
– 6 –  
2. SPECIFICATIONS  
(2) Major Component Specifications  
(A) Indoor Unit  
MODEL No.  
KS2462R  
230 - 208 V / 1 phase / 60 Hz  
RCS - 1PS4U - G  
CR - KS2462R  
Source  
Remote controller (Accessory)  
Controller P. C. B Ass'y  
Control circuit fuse  
250 V, 3 A  
Fan  
Type  
Cross-flow  
Number ... Dia. and length  
Fan motor  
in.  
(mm)  
1 ... O.D. 4 (100), L33-3/8 (847)  
Model  
KFG4X - 31B6P-S  
230 - 208 V / 1 phase / 60 Hz  
4 … 1,365  
Source  
No. of pole … r.p.m. (230 V, High)  
Nominal output  
rpm  
W
30  
Coil resistance  
BRW - WHT  
WHT - VLT  
VLT - ORG  
:
:
:
161.2  
11.6  
68.7  
,
ORG - YEL  
YEL - BLK  
:
:
26.9  
22.8  
(Ambient temperature 68 °F)  
,
,
BLK - PNK : 115.2  
Safety device  
Internal  
Operating temperature  
Open  
Close  
VAC,  
°F  
°F  
µF  
266 ±  
9
181 ± 27  
Run capacitor  
440 V , 1.5 µF  
Heat exchanger  
Coil  
Aluminum plate fin / Copper tube  
2 … 19.5  
Rows … Fins per inch  
Face area  
ft.2  
(m2)  
2.30 (0.214)  
Flap Motor  
Type  
Stepping motor  
Model ... Q’ty  
MP24GA2 ... 2  
Step angle  
5.625 deg / step  
Rating  
V
DC 12 V  
Coil resistance (Ambient temperature 77 °F)  
400 ± 7 %  
DATA SUBJECT TO CHANGE WITHOUT NOTICE  
SM830092  
– 7 –  
2. SPECIFICATIONS  
(2) Major Component Specifications  
(B) Outdoor Unit  
MODEL No.  
C2462R  
230 - 208 V / 1 phase / 60 Hz  
Scroll (Hermetic)  
ZP23K3E  
Source  
Compressor  
Model  
Source  
230 - 208 V / 1 phase / 60 Hz  
2,400  
Nominal output  
W
cc  
Compressor oil  
1,120  
Coil resistance (Ambient temperature 77 °F)  
Safety device  
C - R : 2.28 , C - S : 1.01  
Internal type  
Overload relay models  
Operating temperature  
Open  
Close  
°F  
°F  
284 ±  
9
156  
189  
Operating ampere (at 77 °F)  
Run capacitor  
A
VAC,  
lbs.  
µF  
(kg)  
400 V, 40 µF  
Refrigerant amount charged at shipment  
High pressure switch  
R410A : 6.6 (3)  
ACB - 1UB24W  
+ 0  
Set pressure  
OFF MPa  
ON MPa  
4.15  
– 0.15  
3.15 ± 0.3  
Propeller  
Fan  
Number...diameter  
Fan speeds  
Fan motor  
in.  
(mm)  
1 … 18-3/32 (460)  
2 (AUTO)  
Model  
KFC6T - 91D6P  
230 - 208 V / 1 phase / 60 Hz  
6 … 879  
Source  
No. of pole … rpm (230 V, High)  
Nominal output  
rpm  
W
110  
Coil resistance  
BRW – WHT  
WHT – VLT  
:
:
67.14  
64.85  
,
,
VLT – YEL  
YEL – PNK  
:
:
11.42  
10.60  
(Ambient temperature 68 °F)  
Safety device  
Internal  
Operating temperature  
Open  
Close  
VAC,  
°F  
°F  
248 ±  
9
171 ± 27  
Run capacitor  
Heat exchanger  
Coil  
µF  
440 V, 4 µF  
Aluminum plate fin / Copper tube  
2 … 14.1  
Rows … Fins per inch  
Face area  
ft.2  
(m2)  
8.72 (0.81)  
DATA SUBJECT TO CHANGE WITHOUT NOTICE  
SM830092  
– 8 –  
2. SPECIFICATIONS  
(2) Major Component Specifications  
(B) Outdoor Unit  
MODEL No.  
CL2462R  
230 - 208 V / 1 phase / 60 Hz  
CR - CL2432 (Microprocessor)  
250 V, 3 A  
Source  
Controller P.C.B. Ass'y  
Control circuit fuse  
Compressor  
Scroll (Hermetic)  
ZP23K3E  
Model  
Source  
230 - 208 V / 1 phase / 60 Hz  
2,400  
Nominal output  
W
cc  
Compressor oil  
1,120  
Coil resistance (Ambient temperature 77 °F)  
Safety device  
C – R : 0.885 , C – S : 1.773  
Internal type  
Overload relay models  
Operating temperature  
Open  
Close  
°F  
°F  
284 ±  
156  
9
189  
Operating ampere (at 77 °F)  
Run capacitor  
A
VAC,  
V,  
µF  
W
400 V, 40 µF  
230 V, 30 W  
Crank case heater  
Refrigerant amount charged at shipment  
High pressure switch  
Set pressure  
lbs.  
(kg)  
R410A : 6.6 (3)  
-
ACB 1UB24W  
+ 0  
– 0.15  
OFF MPa  
ON MPa  
4.15  
3.15 ± 0.3  
Propeller  
Fan  
Number...diameter  
Fan speeds  
Fan motor  
in.  
(mm)  
1 ... 18 - 3/32 (460)  
3 (AUTO)  
Model  
KFC6T - 91D6P  
Source  
230 - 208 V / 1 phase / 60 Hz  
No. of pole ..... rpm (230 V, High)  
Nominal output  
6 ... 879  
110  
W
Coil resistance  
(Ambient temperature 68 °F)  
BRN – WHT  
WHT – VLT  
:
:
67.14 , VLT – YEL : 11.42  
64.85 , YEL – PNK : 10.60  
Safety device  
Internal  
248 ± 9  
Operating temperature  
Open  
Close  
VAC,  
°F  
°F  
171 ± 27  
440 V, 4 µF  
Run capacitor  
Heat exchange  
Coil  
µF  
Aluminum plate fin / Copper tube  
Rows ..... Fins per inch  
Face area  
2 ... 14.1  
ft.2  
(m2)  
8.72 (0.81)  
DATA SUBJECT TO CHANGE WITHOUT NOTICE  
SM830092  
– 9 –  
2. SPECIFICATIONS  
(3) Other Component Specifications  
(A) Indoor Unit  
MODEL No.  
KS2462R  
ATR – T5  
Power Transformer  
Rated  
Primary  
AC 230 V, 60 Hz  
AC19 V, 0.5 A  
9.5 VA  
Secondary  
Capacity  
Coil resistance  
(Ambient temprature 77 °F)  
Primary (WHT - WHT) : 457.5  
Secondary (BRN - BRN) : 3.9  
Thermistor cut off temperature  
Thermistor (Coil sensor)  
Coil resistance  
277 °F  
DTN - TKS131B  
32 °F : 15.0 ± 2 %  
DTN - TKS128B  
77 °F : 5.0 ± 3 %  
IND - K301AH  
MP24GA2  
kΩ  
Thermistor (Room sensor)  
Coil resistance  
kΩ  
Lamp Ass'y  
Flap Motor  
SM830092  
– 10 –  
2. SPECIFICATIONS  
(3) Other Component Specifications  
(A) Outdoor Unit  
MODEL No.  
C2462R  
FC - 1SUL  
Compressor Motor Magnetic Contactor  
Coil rated  
AC 240 V, 60 Hz  
587 ± 5 %  
Coil resistance (at 68 °F)  
Contact rated (Main)  
AC 240 V, 26 A  
AC 240 V, 3 A  
HH62S  
Contact rated (Auxiliary)  
Power Relay  
Coil rated  
AC 240 V, 60 Hz  
17.2  
Coil resistance (at 68 °F)  
Contact rated  
kΩ  
AC 220 V, 5 A  
YTB - 4U305F  
Thermostat (Coil sensor)  
Operating Temperature  
°F  
79 ± 3 OFF  
+ 3  
– 1  
75  
ON  
Contact rated  
200 to 240 V, 1 A  
SM830092  
– 11 –  
2. SPECIFICATIONS  
(3) Other Component Specifications  
(B) Outdoor Unit  
MODEL No.  
CL2462R  
FC - 1SUL  
Compressor Motor Magnetic Contactor  
Coil rated  
AC 240 V, 60 Hz  
587 ± 5 %  
Coil resistance (at 77 °F)  
Contact rated (Main)  
AC 240 V, 26 A  
AC 240 V, 3 A  
HH62S  
Contact rated (Auxiliary)  
Power Relay  
Coil rated  
AC 240 V, 60 Hz  
17.2  
Coil resistance (at 77 °F)  
Contact rated  
kΩ  
AC 220 V, 5 A  
ATR - I35B  
Power Transformer  
Rated  
Primary  
AC 220 V, 60 Hz  
14 V, 0.2 A  
2.8 VAC  
Secondary  
Capacity  
Coil resistance (at 78 °F )  
Thermal cut off temperature  
Thermistor (Outdoor Temp. sensor)  
Coil resistance  
WHT – WHT : 482.5  
,
266  
BRN – BRN : 3.95  
°F  
PBC - 41E - S4  
kΩ  
14 °F : 23.7  
23 °F : 18.8  
32 °F : 15.0  
41 °F : 12.1  
,
,
,
,
50 °F : 9.7  
68 °F : 6.5  
86 °F : 4.4  
104 °F : 3.1  
113 °F : 2.6  
Solenoid control valve or coil  
Solenoid control valve  
Solenoid coil  
VPV - 202DQ50  
VPV - MOAQ517B1  
SM830092  
– 12 –  
3. DIMENSIONAL DATA  
(1) Indoor Unit: KS2462R  
44-7/8  
8-31/32  
Remote control unit  
2-13/32  
25/32  
6-27/32  
5-5/16  
Center of tubing  
hole (2 places)  
Wide tube 3/4"(ø19.05)  
Narrow tube 3/8"(ø9.52)  
Drain hose O.D. 23/32"(ø18)  
Dimension : inch  
2199_M_S  
SM830092  
– 13 –  
3. DIMENSIONAL DATA  
(2) Outdoor Unit: C2462R, CL2462R  
4-3/8  
6-23/32  
25-31/32  
1/2  
1/2  
1/2  
1/2  
37  
5
4
5
4
Dimension : inch  
Hole for anchor bolt (4-R1/4)  
Refrigerant tube joint (narrow tube)  
Flare connection 3/8 in (9.52 mm)  
Refrigerant tube joint (wide tube)  
Flare connection 3/4 in (19.05 mm)  
Refrigerant tubing inlet  
Power supply inlet  
SM830092  
– 14 –  
4. COOLING CAPACITY  
Indoor Unit: KS2462R  
Outdoor Unit: C2462R  
1
• 230V / 1 phase / 60Hz  
RATING CAPACITY :  
EVAPORATOR  
27,000 BTU / h  
AIR FLOW RATE :  
CONDENSER  
559 Cu.ft / min  
ENT. TEMP. °F (°C)  
AMBIENT TEMP. °F (°C)  
WB  
DB  
75  
(23.9)  
85  
(29.4)  
95  
(35.0)  
105  
(40.6)  
115  
(46.1)  
TC  
CI  
26,030  
1.81  
24,520  
1.97  
22,820  
2.23  
20,930  
2.49  
27,350  
1.66  
72(22.2)  
76(24.4)  
80(26.7)  
84(28.9)  
88(31.1)  
SHC  
SHC  
SHC  
SHC  
SHC  
TC  
18,460  
20,150  
21,930  
23,620  
25,320  
28,380  
1.67  
17,640  
19,340  
21,110  
22,810  
24,500  
27,110  
1.83  
16,740  
18,430  
20,210  
21,900  
23,600  
25,760  
2
15,760  
17,450  
19,220  
20,920  
22,620  
24,220  
2.26  
14,710  
16,400  
18,170  
19,870  
20,930  
22,550  
2.52  
59  
(15.0)  
CI  
72(22.2)  
76(24.4)  
80(26.7)  
84(28.9)  
88(31.1)  
SHC  
SHC  
SHC  
SHC  
SHC  
TC  
16,130  
17,820  
19,590  
21,290  
22,990  
29,460  
1.69  
15,400  
17,100  
18,870  
20,570  
22,260  
28,300  
1.85  
14,660  
16,360  
18,130  
19,820  
21,520  
# 27,000  
2.02  
13,840  
15,530  
17,310  
19,000  
20,700  
25,570  
2.29  
12,970  
14,670  
16,440  
18,140  
19,830  
24,000  
2.55  
63  
(17.2)  
CI  
13,770  
15,470  
17,240  
18,940  
20,630  
31,020  
1.7  
13,170  
14,870  
16,640  
18,330  
20,030  
29,940  
1.87  
SHC  
SHC  
SHC  
SHC  
SHC  
TC  
72(22.2)  
76(24.4)  
80(26.7)  
84(28.9)  
88(31.1)  
12,510  
14,210  
15,980  
17,680  
19,370  
28,780  
2.05  
11,810  
13,510  
15,280  
16,970  
18,670  
27,510  
2.32  
11,060  
12,760  
14,530  
16,230  
17,920  
26,110  
2.59  
67  
(19.4)  
CI  
72(22.2)  
76(24.4)  
80(26.7)  
84(28.9)  
88(31.1)  
SHC  
SHC  
SHC  
SHC  
SHC  
TC  
11,500  
13,190  
14,960  
16,660  
18,360  
31,640  
1.74  
10,990  
12,680  
14,450  
16,150  
17,850  
30,620  
1.9  
10,450  
12,140  
13,920  
15,610  
17,310  
29,540  
2.08  
9,870  
9,260  
71  
(21.7)  
11,570  
13,340  
15,040  
16,730  
28,300  
2.35  
10,950  
12,730  
14,420  
16,120  
26,970  
2.63  
CI  
76(24.4)  
80(26.7)  
84(28.9)  
88(31.1)  
8,650  
75  
(23.9)  
SHC  
SHC  
SHC  
SHC  
10,560  
12,330  
14,020  
15,720  
10,120  
11,900  
13,590  
15,290  
9,680  
9,170  
10,420  
12,110  
13,810  
11,450  
13,150  
14,840  
10,950  
12,640  
14,340  
TC : Total Cooling Capacity  
SHC : Sensible Heat Capacity  
(BTU / h)  
(BTU / h)  
(kW)  
CI  
: Compressor Input  
Rating conditions are  
: Outdoor Ambient Temp. 95 °F DB  
: Indoor Unit Entering Air Temp. 80 °F DB / 67 °F WB  
SM830092  
– 15 –  
4. COOLING CAPACITY  
Indoor Unit: KS2462R  
Outdoor Unit: C2462R  
1
• 208V / 1 phase / 60Hz  
RATING CAPACITY :  
EVAPORATOR  
26,000 BTU / h  
AIR FLOW RATE :  
CONDENSER  
519 Cu.ft / min  
ENT. TEMP. °F (°C)  
AMBIENT TEMP. °F (°C)  
WB  
DB  
75  
(23.9)  
85  
(29.4)  
95  
(35.0)  
105  
(40.6)  
115  
(46.1)  
TC  
CI  
25,060  
1.79  
23,610  
1.95  
21,970  
2.23  
20,150  
2.52  
26,340  
1.64  
72(22.2)  
76(24.4)  
80(26.7)  
84(28.9)  
88(31.1)  
SHC  
SHC  
SHC  
SHC  
SHC  
TC  
17,760  
19,360  
21,030  
22,630  
24,230  
27,330  
1.66  
16,960  
18,560  
20,230  
21,830  
23,430  
26,100  
1.82  
16,080  
17,680  
19,350  
20,950  
22,550  
24,800  
1.98  
15,120  
16,720  
18,390  
19,990  
21,590  
23,320  
2.27  
14,100  
15,700  
17,370  
18,970  
20,150  
21,710  
2.55  
59  
(15.0)  
CI  
72(22.2)  
76(24.4)  
80(26.7)  
84(28.9)  
88(31.1)  
SHC  
SHC  
SHC  
SHC  
SHC  
TC  
15,540  
17,140  
18,810  
20,410  
22,010  
28,370  
1.67  
14,840  
16,430  
18,110  
19,700  
21,300  
27,250  
1.83  
14,110  
15,710  
17,380  
18,980  
20,580  
# 26,000  
2
13,310  
14,910  
16,580  
18,180  
19,780  
24,620  
2.29  
12,470  
14,070  
15,740  
17,340  
18,940  
23,110  
2.58  
63  
(17.2)  
CI  
13,310  
14,910  
16,580  
18,180  
19,770  
29,870  
1.69  
12,720  
14,320  
15,990  
17,590  
19,190  
28,830  
1.85  
SHC  
SHC  
SHC  
SHC  
SHC  
TC  
72(22.2)  
76(24.4)  
80(26.7)  
84(28.9)  
88(31.1)  
12,080  
13,680  
15,350  
16,950  
18,550  
27,720  
2.03  
11,390  
12,990  
14,660  
16,260  
17,860  
26,490  
2.32  
10,670  
12,260  
13,940  
15,540  
17,130  
25,140  
2.62  
67  
(19.4)  
CI  
72(22.2)  
76(24.4)  
80(26.7)  
84(28.9)  
88(31.1)  
SHC  
SHC  
SHC  
SHC  
SHC  
TC  
11,150  
12,750  
14,420  
16,020  
17,620  
30,470  
1.72  
10,650  
12,250  
13,920  
15,520  
17,120  
29,480  
1.88  
10,130  
11,730  
13,400  
15,000  
16,600  
28,440  
2.06  
9,570  
8,970  
71  
(21.7)  
11,170  
12,840  
14,440  
16,040  
27,250  
2.36  
10,570  
12,240  
13,840  
15,440  
25,970  
2.66  
CI  
76(24.4)  
80(26.7)  
84(28.9)  
88(31.1)  
8,380  
75  
(23.9)  
SHC  
SHC  
SHC  
SHC  
10,240  
11,910  
13,510  
15,110  
9,810  
9,380  
8,890  
10,050  
11,650  
13,250  
11,480  
13,080  
14,680  
11,050  
12,650  
14,250  
10,560  
12,160  
13,760  
TC : Total Cooling Capacity  
SHC : Sensible Heat Capacity  
(BTU / h)  
(BTU / h)  
(kW)  
CI  
: Compressor Input  
Rating conditions are  
: Outdoor Ambient Temp. 95 °F DB  
: Indoor Unit Entering Air Temp. 80 °F DB / 67 °F WB  
SM830092  
– 16 –  
5. PERFORMANCE CHARTS  
(1) Operating Current  
Indoor Unit: KS2462R  
Outdoor Unit: C2462R  
1
Operating current characteristics versus outdoor ambient temperature and indoor temperature.  
(Indoor relative humidity: 50%, Indoor fan speed: High)  
230V  
Outdoor fan speed  
Low  
High  
14  
13  
12  
11  
10  
Indoor  
temp.  
°F (°C)  
85 (30)  
80 (27)  
75 (24)  
70 (21)  
9
8
7
59  
(15)  
68  
(20)  
77  
(25)  
86  
(30)  
95  
(35)  
104  
(40)  
Outdoor ambient temp. °F (°C)  
1061_X_S  
Outdoor fan speed  
208V  
Low  
High  
Indoor  
temp.  
14  
°F (°C)  
13  
12  
11  
10  
85 (30)  
80 (27)  
75 (24)  
70 (21)  
9
8
7
59  
(15)  
68  
(20)  
77  
(25)  
86  
(30)  
95  
(35)  
104  
(40)  
Outdoor ambient temp. °F (°C)  
1062_X_S  
SM830092  
– 17 –  
5. PERFORMANCE CHARTS  
(1) Operating Current  
Indoor Unit: KS2462R  
Outdoor Unit: CL2462R  
2
Operating current characteristics versus outdoor ambient temperature and indoor temperature.  
(Indoor relative humidity: 50%, Indoor fan speed: High)  
230V  
Outdoor fan speed  
Med  
Low  
High  
14  
13  
12  
11  
10  
9
Indoor  
temp.  
°F (°C)  
85 (30)  
80 (27)  
75 (24)  
70 (21)  
8
7
23  
(–5)  
32  
(0)  
41  
(5)  
50  
(10)  
59  
(15)  
68  
(20)  
77  
(25)  
86  
(30)  
95  
(35)  
104  
(40)  
Outdoor ambient temp. °F (°C)  
1063_X_S  
208V  
Outdoor fan speed  
Low  
Med  
High  
Indoor  
14  
temp.  
°F (°C)  
13  
12  
11  
10  
9
85 (30)  
80 (27)  
75 (24)  
70 (21)  
8
7
23  
(–5)  
32  
(0)  
41  
(5)  
50  
(10)  
59  
(15)  
68  
(20)  
77  
(25)  
86  
(30)  
95  
(35)  
104  
(40)  
Outdoor ambient temp. °F (°C)  
1064_X_S  
SM830092  
– 18 –  
5. PERFORMANCE CHARTS  
(2) High and Low Pressure  
Indoor Unit: KS2462R  
Outdoor Unit: C2462R  
1
• High Pressure  
High pressure characteristics versus outdoor ambient temperature and indoor temperature.  
(Indoor relative humidity: 50%, Indoor fan speed: High)  
230V / 208 V  
Outdoor fan speed  
Low  
High  
480  
460  
440  
420  
400  
380  
360  
340  
320  
300  
Indoor  
temp.  
°F (°C)  
85 (30)  
80 (27)  
75 (24)  
70 (21)  
59  
68  
(20)  
77  
(25)  
86  
(30)  
95  
(35)  
104  
(40)  
(15)  
Outdoor ambient temp. °F (°C)  
1065_X_S  
• Low Pressure  
Low pressure characteristics versus outdoor ambient temperature and indoor temperature.  
(Indoor relative humidity: 50%, Indoor fan speed: High)  
Outdoor fan speed  
230V / 208 V  
Low  
High  
170  
160  
150  
140  
130  
120  
110  
Indoor  
temp.  
°F (°C)  
85 (30)  
80 (27)  
75 (24)  
70 (21)  
59  
(15)  
68  
(20)  
77  
(25)  
86  
(30)  
95  
(35)  
104  
(40)  
Outdoor ambient temp. °F (°C)  
1066_X_S  
SM830092  
– 19 –  
5. PERFORMANCE CHARTS  
(2) High and Low Pressure  
Indoor Unit: KS2462R  
Outdoor Unit: CL2462R  
2
• High Pressure  
High pressure characteristics versus outdoor ambient temperature and indoor temperature.  
(Indoor relative humidity: 50%, Indoor fan speed: High)  
230 / 208V  
Outdoor fan speed  
Low  
Med  
High  
500  
480  
460  
420  
400  
380  
360  
340  
320  
300  
Indoor  
temp.  
°F (°C)  
85 (30)  
80 (27)  
75 (24)  
70 (21)  
23  
32  
(0)  
41  
(5)  
50  
(10)  
59  
(15)  
68  
(20)  
77  
(25)  
86  
(30)  
95  
(35)  
104  
(40)  
(–5)  
Outdoor ambient temp. °F (°C)  
1067_X_S  
• Low Pressure  
Low pressure characteristics versus outdoor ambient temperature and indoor temperature.  
(Indoor relative humidity: 50%, Indoor fan speed: High)  
Outdoor fan speed  
230 / 208V  
Low  
Med  
High  
170  
160  
150  
140  
130  
120  
110  
Indoor  
temp.  
°F (°C)  
85 (30)  
80 (27)  
75 (24)  
70 (21)  
23  
(–5)  
32  
(0)  
41  
(5)  
50  
(10)  
59  
(15)  
68  
(20)  
77  
(25)  
86  
(30)  
95  
(35)  
104  
(40)  
Outdoor ambient temp. °F (°C)  
1068_X_S  
SM830092  
– 20 –  
6. AIR THROW DISTANCE CHART  
Indoor Unit: KS2462R  
Room air temp.  
Fan speed  
:
:
80°F (26.7°C)  
High  
Horizontal distance (ft.)  
15 20  
5
10  
25  
30  
0
5
10  
15  
: Flap angle 0  
: Flap angle 30  
°
,
°
: Axis air velocity 0 °  
: Axis air velocity 30 °  
,
2200_M_S  
SM830092  
– 21 –  
7. REFRIGERANT FLOW DIAGRAM  
Indoor Unit: KS2462R  
Outdoor Unit: C2462R  
Indoor Unit  
Outdoor Unit  
Wide tube  
Wide tube  
service valve  
LP  
O. D.  
3/4"  
O. D.  
3/4"  
Accumulator  
(19.05mm)  
(19.05mm)  
High  
HP  
pressure  
switch  
Narrow tube  
service valve  
Capillary  
tube  
Strainer  
Narrow tube  
Sub-condenser  
O. D.  
O. D.  
3/8"  
3/8"  
(9.52 mm)  
(9.52 mm)  
2201_M_S  
Indoor Unit: KS2462R  
Outdoor Unit: CL2462R  
Indoor Unit  
Outdoor Unit  
Wide tube  
Wide tube  
service valve  
LP  
O. D.  
3/4"  
O. D.  
3/4"  
Accumulator  
(19.05mm)  
(19.05mm)  
High  
pressure  
switch  
HP  
Capillary  
S
HGBV  
Narrow tube  
service valve  
Capillary  
tube  
Strainer  
Narrow tube  
Sub-condenser  
O. D.  
O. D.  
3/8"  
3/8"  
(9.52 mm)  
(9.52 mm)  
2202_M_S  
SM830092  
– 22 –  
8. INSTALLATION INSTRUCTIONS  
1) Tubing Length  
Tubing length (L)  
• Refrigerant tubing between the indoor and  
outdoor units should be kept as short as  
possible.  
INDOOR  
UNIT  
• Select and decide the installation location  
so that the length of the refrigerant tubing  
will be within the limits given in Table 1.  
Elevation difference (H)  
OUTDOOR  
UNIT  
0711_M_I  
Fig. 1  
Table 3  
Max. Allowable Tubing  
Length at Shipment  
(ft.)  
Limit of Tubing  
Length (L)  
(ft.)  
Limit of Elevation  
Difference (H)  
(ft.)  
Required Amount of  
Additional Refrigerant  
Model  
*
(oz./ft.)  
C2462R, CL2462R  
23  
132  
50  
0.43  
*
If total tubing length becomes 23 to 132 ft. (max.), additional refrigerant (R410A) charge of 0.43 oz./ft. is required.  
No additional charge of compressor oil is necessary.  
SM830092  
– 23 –  
8. INSTALLATION INSTRUCTIONS  
2) Selecting the Installation Site  
Indoor Unit  
Indoor unit  
AVOID:  
areas where leakage of flammable gas may  
be expected.  
places where large amounts of oil mist  
exist. (Fig. 2)  
direct sunlight.  
locations near heat sources which may  
affect performance of the unit.  
locations where external air may enter the  
room directly. This may cause “sweating”  
on the air discharge ports, causing them to  
spray or drip. (Fig. 3)  
Drain hose  
Outside drainage  
2203_M_S  
locations where the remote control unit will  
be splashed with water or affected by  
dampness or humidity.  
Fig. 2  
6 inches min.  
6 inches  
min.  
DO:  
6 inches  
min.  
select an appropriate position from which  
every corner of the room can be uniformly  
air-conditioned.  
INDOOR UNIT  
select a location that will hold weight of the  
unit.  
select a location where the tubing and drain  
pipe have the shortest run to the outside.  
(Fig. 2)  
allow room for operation and maintenance  
as well as unrestricted air flow around the  
unit. (Fig. 3a and 3b)  
Install the unit within the maximum  
elevation difference above or below the  
outdoor unit and within a total tubing length  
from the outdoor unit as detailed in Table 1  
and Fig. 1 on the previous page.  
Front View  
2204_M_S  
Fig. 3a  
CAUTION  
Indoor Unit  
For stable operation of  
the air conditioner, do  
not install wall-mounted  
type indoor units less  
than 5 ft. from floor  
level.  
Wall  
Minimum height  
from floor level  
5 ft.  
Floor level  
2205_M_S  
Fig. 3b  
SM830092  
– 24 –  
8. INSTALLATION INSTRUCTIONS  
Exhaust fan  
Outdoor Unit  
AVOID:  
Hot air  
Heat source  
Out-  
door  
unit  
heat sources, exhaust fans, etc. Fig. 4  
damp, humid or uneven locations.  
0591_C_I  
DO:  
Fig. 4  
choose a place as cool as possible.  
choose a place that is well ventilated and  
outside air temperature does not exceed  
maximum 115 °F constantly.  
allow enough room around unit for air intake/  
exhaust and possible maintenance. Fig. 5  
provide a solid base; about 6 inch above  
grond level to reduce humidity and possible  
water damage in the unit and decrease  
service life. Fig. 6  
Min.  
1 inch  
Min.  
1 inch  
Obstacle above  
Min.  
7 ft.  
4 in.  
Air  
dis-  
charge  
Min. 2 ft.  
0931_C_I  
Ground  
use lug bolts or equivalent to bolt down unit,  
reducing vibration and noise.  
0932_C_I  
Fig. 5  
Air in  
Air in  
CAUTION  
If more than 2 outdoor units are installed in the  
same location, keep at least 3 meters away from  
the neighboring unit to avoid influence of air  
discharge.  
Air  
discharge  
Concrete block  
4 inch 1 ft. 4 inch  
beams or equal  
Min. 6 inch  
0934_C_I  
Air discharge chamber for top discharge  
Anchor bolts  
(4 pieces)  
Install the air-discharge chamber in the filed when:  
Fig. 6  
it is difficult to keep a space of minimum 2 ft.  
between the air-discharge outlet and the  
obstacle.  
Air discharge  
the air-discharge outlet is facing the sidewalk  
and discharged hot air can annoy the  
passers-by.  
Refer to Fig. 6 and Fig. 7.  
0426_C_I  
Fig. 7  
SM830092  
– 25 –  
8. INSTALLATION INSTRUCTIONS  
Wind Shield for "CL" Model  
IMPORTANT  
Wind shield  
(air discharge side)  
It is recommended to use wind shields for "CL" model  
(Fig. 5b). "CL" model is designed to use in low outdoor  
temperature conditions.  
Front  
General  
When the outdoor unit is installed in a position exposed  
to strong wind (like seasonal winds with low air tempera-  
ture in winter), a suitable wind shield must be installed  
on the outdoor unit.  
Fig. 5b  
This unit is designed so that the fan of the outdoor unit  
runs at low speed when the air conditioner is operated at  
low outdoor air temperatures. When the outdoor unit is  
exposed to strong wind, the system pressure drops  
because of the freeze protector.  
Recommended outer dimensions of wind shield  
(field supply)  
hole  
ø1-9/16"  
3 -  
For outer dimensions of the wind shield, see Fig. 5c.  
21-13/16"  
ø15/64" hole  
6 -  
1-1/16"  
9-27/32"  
9-27/32"  
5-5/32"  
21-13/16"  
CL2462R  
Fig. 5c  
SM830092  
– 26 –  
8. INSTALLATION INSTRUCTIONS  
3) Electrical Wiring  
General Precautions on Wiring  
(1) Before wiring, confirm the rated voltage of  
the unit as shown on its nameplate, then  
carry out the wiring closely following the  
wiring diagram.  
(7) Regulations on wire diameters differ from  
locality to locality. For field wiring rules,  
please refer to your LOCAL ELECTRICAL  
CODES before beginning. You must  
ensure that installation complies with all  
relevant rules and regulations.  
(2) Provide a power outlet to be used  
exclusively for each unit, and a power  
supply disconnect and circuit breaker for  
overcurrent protection should be  
provided in the exclusive line.  
(3) To prevent possible hazards from insulation  
failure, the unit must be grounded.  
(4) Each wiring connection must be done in  
accordance with the wiring system  
diagram. Wrong wiring may cause the  
unit to misoperate or become damaged.  
(5) Do not allow wiring to touch the refrigerant  
tubing, compressor, or any moving parts  
of the fan.  
(6) Unauthorized changes in the internal  
wiring can be very dangerous. The  
manufacturer will accept no repsonsibility  
for any damage or misoperation that  
occurs as a result of such unauthorized  
changes.  
SM830092  
– 27 –  
8. INSTALLATION INSTRUCTIONS  
7-2. Recommended Wire Length and Wire Diameter for Power Supply System  
(B)*1 Inter-unit  
Wiring  
Time Delay  
Fuse or  
Circuit  
(A)*1 Power Supply  
Models  
Capacity  
AGW #14  
132 ft.  
C2462R, CL2462R  
64 ft. (AWG #12)  
35 A  
*1 Refer to the Wiring System Diagrams (See below diagram) for the meaning of “A” and “B.”  
AWG = American Wire Gauge  
Disconnect SW  
(Field supply)  
NOTE  
Indoor Unit  
Outdoor Unit  
To access the electrical component box, open the air  
intake grille and remove the electrical component box  
cover.  
(B)  
1
2
1
2
7-3. Wiring System Diagram  
G
G
4
Outdoor Unit: “C”, “CL” models  
Single-phase  
Ground  
4
(A)  
60 Hz, 208/230 V  
L1  
L2  
G
Ground  
SM830092  
– 28 –  
9. ELECTRICAL DATA  
Electrical characteristics  
Indoor model: KS2462R / Outdoor model: C2462R, CL2462R  
Indoor Unit  
Fan Motor  
Outdoor Unit  
Fan Motor Compressor  
230 - 208 V / 1 phase / 60 Hz  
Complete Unit  
Performance at  
A
kW  
A
0.38 - 0.37  
0.08 - 0.07  
0.38 - 0.37  
0.08 - 0.07  
1 - 1  
0.90 - 0.90  
0.18 - 0.17  
0.90 - 0.90  
0.18 - 0.17  
1 - 1  
8.8 - 9.6  
10.1 - 10.9  
2.25 - 2.24  
12.4 - 13.7  
2.81 - 2.32  
63 - 57  
Rating conditions  
2.02 - 2.00  
11.1 - 12.4  
2.55 - 2.58  
61 - 55  
Full load conditions  
Starting amperes  
kW  
A
Rating Conditions  
: Indoor Air Temperature  
80 °F DB / 67 °F WB  
Outdoor Air Temperature 95 °F DB  
Full Load Conditions : Indoor Air Temperature  
Outdoor Air Temperature 115 °F DB  
80 °F DB / 67 °F WB  
SM830092  
– 29 –  
10. ELECTRICAL WIRING DIAGRAMS  
(1) Indoor Unit  
KS2462R  
1
• Electric Wiring Diagram  
TERMINAL  
PLATE  
WHT  
BLK  
FAN MOTOR  
1
2
GRN / YEL  
G
GRN  
RED  
G
4
FMI  
G
G
GRN  
CONNECTOR  
1 3 5  
1 3 5  
8 7 6 5 4 3 2 1 [WHT]  
8 7 6 5 4 3 2 1  
w
G
SUP  
5P [WHT]  
CAPACITOR  
PNK  
BRN  
GRY  
WHT  
VLT  
ORG  
YEL  
BLK  
PRY  
3P [RED]  
WHT  
WHT  
1 1  
3 3  
w FM  
P
S
w
w
w
w
w
HH  
H
M
SEC  
2P [WHT]  
BRN  
BRN  
1 1  
2 2  
L
LL  
3 3  
2 2  
1 1  
CONNECTOR  
RECEIVER  
3P [WHT]  
WHT  
1 1  
2 2  
3 3  
4 4  
[WHT] [WHT]  
[WHT]  
WHT  
GRY  
GRY  
WHT  
GRY  
GRY  
GRY  
1 1  
2 2  
3 3  
1 1  
2 2  
3 3  
4 4  
5 5  
BLU  
BLU  
BLU  
BLU  
FLAP1  
5P [WHT]  
1 1  
2 2  
3 3  
4 4  
FLP  
LAMP  
4P [WHT]  
5
5
4 4  
5 5  
6 6  
7 7  
FLAP MOTOR [UPPER]  
CONNECTOR  
CONTROLLER  
COIL THERMISTOR (TH1)  
[WHT] [GRN]  
[BLK]  
BLK  
BLK  
BLK  
BLK  
1 1  
2 2  
3 3  
4 4  
WHT  
BLU  
BLU  
BLU  
BLU  
1 1  
2 2  
3 3  
1 1  
2 2  
3 3  
4 4  
5 5  
ROOM/COIL  
4P [WHT]  
FLAP2  
5P [BLK]  
FLP  
4 4  
5 5  
ROOM THERMISTOR (TH2)  
*FLAP MOTOR [LOWER]  
8512-5253-714XX-1 (KS2432A)  
SM830092  
– 30 –  
10. ELECTRICAL WIRING DIAGRAMS  
Outdoor Unit  
C2462R  
• Electric Wiring Diagram  
7
8
5
6
2Y  
TERMINAL PLATE (6P)  
1
3
2
4
RED  
1
2
2P (WHT)  
1
2
1
2
WHT  
BLK  
BLK  
BLK  
WHT  
WHT  
G
4
P
P
S
S
63PH  
63PL  
1
1
RED  
RED  
L1  
L2  
G
RED  
2
2
RED  
L1  
L2  
2P (GRN)  
EARTH  
TERMINAL  
23S  
L
C
H
BLK  
A
R
S
V
T
13  
31  
32  
52C  
7
1Y  
8
B
U
W
14  
5
6
1
3
2
4
RED  
BRN  
BRN  
RC2  
RC1  
EARTH  
TERMINAL  
P
S
1
1
2
2
3
3
4
4
5
6
6
7
8
8
8P  
(WHT)  
5
7
R
S
C
CM  
FMO  
49FO  
854-2-5269-160-00-0  
SM830092  
– 31 –  
10. ELECTRICAL WIRING DIAGRAMS  
Outdoor Unit  
C2462R  
• Schematic Diagram  
TERMINAL  
PLATE (6P)  
– 1  
– 2  
– G  
– 4  
2Y  
2Y  
1
2
49FO  
52C  
2Y  
1
– L1  
– L2  
2
1
1Y  
H
63PH  
63PL  
M
5
6
52C  
2
FMO  
2
1
C
23S  
L
H
RC2  
RC1  
1Y  
R
S
C
CM  
52C  
854-2-5269-160-00-0  
Symbols  
Description  
CM  
Compressor Motor  
Outdoor Fan Motor  
FMO  
52C  
Compressor Motor Magnetic Contactor  
Outdoor Fan Motor Thermal Protector  
High Pressure Switch  
Low Pressure Switch  
49FO  
63PH  
63PL  
23S  
Fan Speed Control Thermostat  
Running Capacitor  
RC1, 2  
1Y, 2Y  
Auxiliary Relay  
Terminal Base  
Connector  
SM830092  
– 32 –  
10. ELECTRICAL WIRING DIAGRAMS  
Outdoor Unit  
CL2462R  
B L K  
B L K  
B R N  
B R N  
W H T  
W H T  
R E D  
R E D  
Y E
V L T  
Y E L  
V L T  
W H
B L K  
G R
B R
P N
W H T  
G R Y  
G R Y  
B R N  
B R N  
P N K  
R E D  
R E D  
B R N  
B L K  
B L K  
B L K  
W H T  
W H T  
W H T  
W H T  
B L K  
B L K  
R E D  
B R N  
6 0 H z 1 ø 2 0 8 V / 2 3 0 V  
P O W E R S U P P L Y  
T O I N D O O R U N I T  
SM830092  
– 33 –  
10. ELECTRICAL WIRING DIAGRAMS  
Outdoor Unit  
CL2462R  
• Schematic Diagram  
TERMINAL  
PLATE (6P)  
CR-CL2462R  
CONTROLLER  
F1 (3A)  
-1  
1
-2  
TH  
1
2
1
3
3
TEMP  
RY1  
-G  
-4  
OUTDOOR  
TEMPERATURE  
1Y  
RY3  
RY2  
H
M
L
-L1  
-L2  
52C  
5
5
7
9
1
52C  
49FO  
6
7
1
CH  
2
1
2
1
4
RY1  
RY2  
RY3  
L
TR  
AC 208V  
52C  
63PH  
63PL  
2
1
3
PRY  
SEC  
HGBV  
FMO  
M
52C  
1Y  
230V  
HGBV  
DC12V  
1
2
1Y  
1
2
AC 14V  
RC2  
RC1  
R
3
1
3
S
C
F2 (3A)  
COM  
COM  
3
CM  
854-2-5269-159-00-0  
Symbols  
Description  
CM  
Compressor Motor  
Crankcase Heater  
Outdoor Fan Motor  
CH  
FMO  
52C  
Compressor Motor Magnetic Contactor  
Outdoor Fan Motor Thermal Protector  
High Pressure Switch  
Low Pressure Switch  
Hot Gas Bypass Valve  
Power Transformer  
Thermistor (Outdoor Temperature)  
Running Capacitor  
Auxiliary Relay  
49FO  
63PH  
63PL  
HGBV  
TR  
TH  
RC1, 2  
RY1~3, 1Y  
CR-CL2432  
F1, 2  
Outdoor Controller  
Fuse  
Terminal Base  
Connector  
Terminal  
SM830092  
– 34 –  
11. PROCESSES AND FUNCTIONS  
(1) Room Temperature Control  
The Unit adjusts room temperature by turning the outdoor unit’s compressor ON and OFF.  
This process is controlled by the thermostat located in the indoor unit.  
The figures shows how each part of the system performs when the room temperature  
changes and the thermostat activates the compressor to start (thermo ON) or stop (thermo  
OFF). Fig. 1 shows about the cooling cycle.  
Signal from remote control unit  
3 minutes 3 minutes 3 minutes 3 minutes 3 minutes 3 minutes 3 minutes  
Thermo.  
OFF  
Thermo.  
ON  
Thermo.  
OFF  
Thermo.  
ON  
Thermo.  
ON  
Thermo.  
ON  
Thermo.  
OFF  
T + 2 °F  
set temp.  
T °F  
More than  
5 minutes  
5 minutes  
ON  
3 minutes  
Room temp.  
Compressor  
ON  
ON  
OFF  
OFF  
OFF  
OFF  
ON  
ON  
OFF  
Outdoor fan  
Indoor fan  
ON  
OFF  
Set speed  
2212_M_S  
Fig. 11  
Chart Summary and Explanations  
Once the compressor starts, it keeps running for 5 minutes.  
Once the compressor stops, it will not start running again for 3 minutes.  
If you change the operation mode during the cooling cycle, the control circuit stops the  
compressor for 3 minutes.  
For 5 minutes after the compressor is first turned on, and for 3 minutes after it is turned off,  
the compressor is not controlled by the room sensor.  
Thermo ON: When room temperature rises 1 °F above the set temperature T˚, (T ˚+1 °F):  
Compressor  
ON  
Thermo OFF: When the room temperature is equal to or below the set temperature T˚:  
Compressor  
OFF  
SM830092  
– 35 –  
11. PROCESSES AND FUNCTIONS  
(2) Dry Operation (Dehumidification)  
Dry operation uses the ability of the cooling cycle to remove moisture from the air, but by  
running at low level to dehumidify without greatly reducing the room temperature. The air  
conditioner repeats the cycle of turning ON and OFF automatically as shown in the chart  
below according to the room temperature.  
Room temp.  
Cooling operation  
T + 4 °F  
Dry A zone  
Compressor :  
Continuous operation  
FMI (indoor fan) : L (low speed) / LL (very low speed) intermittent ventilation  
Set temp. T °F  
only while the compressor is ON.  
T – 2 °F  
Dry B zone  
Compressor :  
Intermittent operation (ON for 3 minutes and OFF for 9 minutes)  
FMI (indoor fan) : L (low speed) / LL (very low speed) intermittent ventilation  
only while the compressor is ON.  
Room temp. 59 °F  
Monitor zone  
Both the indoor and outdoor units stop.  
2213_M_S  
Fig. 12  
NOTE  
Intermittent ventilation occurs by switching the indoor fan speed between L  
LL.  
Dry operation does not occur when the room temperature is under 59°F, which is the monitor zone.  
When the compressor stops, the indoor fan stops as well.  
SM830092  
– 36 –  
11. PROCESSES AND FUNCTIONS  
(3) Freeze Prevention  
Freeze Prevention keeps the indoor heat exchange coil from freezing. Freezing reduces the  
efficiency of the unit, and frost buildup on the coil blocks cool air circulation from the indoor  
unit’s fan.  
Thermo. OFF  
Room temp.  
Thermo. ON  
T + 4 °F  
Set temp. T °F  
More than  
6 minutes  
Indoor heat exch.  
coil temp.  
6 minutes  
30 °F  
More than  
10 minutes  
More than  
10 minutes  
Compressor  
Indoor fan  
OFF  
OFF  
ON  
ON  
ON  
ON  
Set speed  
Set speed  
2214_M_S  
Fig. 13  
Chart Summary and Explanations  
When the compressor has been running for 6 minutes or more and the temperature of the  
indoor heat exchange coil falls below 30°F, the control circuit stops the compressor for at  
least 6 minutes. The compressor does not start again until the temperature rises above  
46°F or 6 minutes has elapsed.  
SM830092  
– 37 –  
11. PROCESSES AND FUNCTIONS  
(4) Outdoor Fan Speed Control  
(1) C2462R Type  
• In low outdoor temperature, the outdoor fan is set automatically from HIGH to LOW  
to prevent the indoor heat exchanger from freezing.  
• When the outdoor temperature falls below 78 °F, the outdoor fan is set from HIGH to  
LOW automatically. When the outdoor temperature rises to 82 °F, the outdoor fan is  
set from LOW to HIGH automatically.  
(2) CL2462R Type  
• In low outdoor temperature, the outdoor fan is set automatically from HIGH to MED,  
LOW to prevent the indoor heat exchanger from freezing.  
• When the outdoor temperature falls below 77 °F, the outdoor fan is set from HIGH to  
MED automatically. When the outdoor temperature rises to 81 °F, the outdoor fan is  
set from MED to HIGH automatically.  
• When the outdoor temperature falls below 59 °F, the outdoor fan is set from MED to  
LOW automatically. When the outdoor temperature rises to 63 °F, the outdoor fan is  
set from LOW to MED automatically.  
• When the outdoor temperature falls below 50 °F, the hot gas bypass valve opens  
and keeps the pressures up by allowing some hot gas to be bypassed to the suction  
of the compressor.  
760  
H
380  
M
230  
L
OFF  
HGBV  
(HOT GAS  
BYPASS VALVE)  
ON  
47 50  
59 63  
77 81  
2217_X_S  
(8.3) (10)  
(15) (17)  
(25) (27)  
OUTDOOR AIR TEMPERATURE °F DB  
Fig. 14  
SM830092  
– 38 –  
12. SERVICE PROCEDURES  
(1) Troubleshooting  
1) Check before and after Troubleshooting  
Many problems may happen because of wiring or power supply problems, so you  
should check these areas first. Problems here can cause false results in some of the  
other tests, and so should be corrected first.  
Check power supply wiring  
(a) Single-phase  
Check that power supply wires are correctly connected to L1 and L2 on the  
6P terminal in the outdoor unit.  
Check inter-unit wiring  
1
2
Check that inter-unit wiring (AC 230 - 208 V Line voltage) is correctly con-  
nected between the indoor unit and outdoor unit.  
Single-phase outdoor unit  
Indoor Unit  
Outdoor Unit  
Inter-Unit Wiring  
(Line voltage)  
230V/208V  
4P Terminal  
6P Terminal  
1
2
1
2
230V/208V  
Grounding line  
230V/208V  
G
4
G
4
(A)  
Power supply  
Single phase  
230V/208V 60Hz  
(B)  
L1  
L2  
Disconnect  
switch  
(Field supply)  
G
Grounding line  
2206_M_S  
Fig. 15  
Check power supply  
3
Check that voltage is within the specified range (±10 % of the rating).  
Check that power is being supplied.  
If the following troubleshooting must be done with power being supplied, be  
careful not to touch any uninsulated live part that can cause ELECTRIC  
SHOCK.  
Check the lead wires and connectors in indoor and outdoor units.  
4
5
Check that the sheath of lead wires is not damaged.  
Check that the lead wires are firmly connected at the terminal plate.  
Check that the wiring is correct.  
Reference  
Condition of general cooling operation (Thermo. ON)  
SWEEP .................. ON  
Indoor fan speed .... HIGH  
SM830092  
– 39 –  
12. SERVICE PROCEDURES  
2) Air Conditioner does not Operate  
Circuit breaker trips (or fuse blows).  
1
(a) When the circuit breaker is set to ON, it is tripped soon.  
• There is a possibility of ground fault.  
• Check insulation resistance.  
If resistance value is 2 Mor less, it is a defect of insulation.  
(Example)  
1
2
3
Outdoor  
unit  
Indoor  
unit  
1
2
G
4
4
L1  
L2  
G
1
2
+
+
+
+
+
Circuit  
+
breaker  
Power  
supply  
cords  
G
4
+
+
Inter-unit  
power line  
Ground  
*Set the circuit breaker to OFF.  
1
Remove power supply cords  
from the terminal plate in  
the outdoor unit.  
NO  
Execute  
rewiring.  
• Check insulation resistance  
of power supply cords.  
OK  
Remove inter-unit power line  
from the terminal plate in  
the outdoor unit.  
• Check insulation resistance  
of outdoor unit.  
2
• Check insulation  
resistance of  
electrical parts  
in the outdoor unit.  
NO  
Insulation of  
outdoor unit  
is defective.  
OK  
3
Remove inter-unit power line  
from the terminal plate in  
the indoor unit.  
NO  
• Check insulation  
resistance of  
electrical parts  
in the indoor unit.  
Insulation of  
outdoor unit  
is defective.  
• Check insulation resistance  
of indoor unit.  
OK  
Inter-unit power lines are  
defective.  
Execute  
rewiring.  
1032_X_S  
SM830092  
– 40 –  
12. SERVICE PROCEDURES  
(b) Circuit breaker trips in several minutes after turning the air conditioner on.  
• There is a possibility of short circuit.  
• Check capacity of circuit  
breaker.  
Replace it with a  
suitable one.  
(= larger capacity)  
NO  
Is capacity of circuit  
breaker sufficient ?  
• Check resistance of  
outdoor fan motor winding.  
• Check resistance of  
compressor motor winding.  
• Check resistance of flap  
motor winding.  
2218_X_S  
Neither indoor unit nor outdoor unit runs.  
2
A. Power is not supplied  
Circuit breaker  
is tripped.  
Reset the breaker.  
• Check power supply.  
Is power being supplied  
to outdoor unit ?  
NO  
Wait for recovery  
or consult power  
supply company.  
Power failure.  
0615_X_S  
B. Check remote control unit.  
• Try to run both indoor and  
outdoor units with another  
remote control unit.  
OK  
The other remote control  
unit is defective.  
0616_X_S  
SM830092  
– 41 –  
12. SERVICE PROCEDURES  
C. Check “Operation selector” switch in the indoor unit.  
• Has “Operation selector”  
switch been set to ON  
position ?  
IND. LAMP Ass’y or P.C.B.  
Ass’y in the indoor unit  
is defective.  
YES  
NO  
Set “Operation selector”  
switch to ON.  
But neither unit runs.  
Switch Ass’y or P.C.B.  
Ass’y in the indoor unit  
is defective.  
0617_X_S  
D. Check compressor motor protectors.  
(a) High pressure switch (63PH)  
Disconnect the socket from 2P (WHT) connector.  
Check the continuity between No.1 and No.2 poles  
of the socket.  
• Check high pressure switch.  
Does high pressure switch  
actuate ?  
(63PH)  
YES  
• Is outdoor heat exchanger  
coil dirty or are there  
obstacles near air suction  
inlet of outdoor unit ?  
Clean heat exchanger coil  
or remove obstacles.  
YES  
NO  
• Check if outdoor fan rotates.  
Refer to “Only outdoor fan  
does not run.”  
0618_X_S  
E. Transformer in indoor unit.  
• Check resistance of  
transformer winding. (TR1)  
1033_X_S  
SM830092  
– 42 –  
12. SERVICE PROCEDURES  
F. Check. auxiliary relay. (1Y or 2Y)  
• Check coil resistance of  
auxiliary relay.  
(1Y or 2Y)  
0620_X_S  
G. Check fuse on the P.C.B. Ass’y in the indoor unit.  
• Check fuse on the P.C.B.  
Ass'y in the indoor unit  
for continuity.  
• Check coil of compressor  
motor magnetic contactor.  
(52C)  
When the fuse blows.  
OK  
• Check resistance of  
primary and secondary  
winding of transformer.  
• P.C.B. Ass'y is defective.  
OK  
• Check resistance of indoor  
fan motor winding.  
OK  
2219_X_S  
SM830092  
– 43 –  
12. SERVICE PROCEDURES  
3) Outdoor Unit does not Run.  
A. Check COOL / FAN selector switch in the remote control unit.  
• Is MODE selector button  
set to COOL ?  
NO  
Set to COOL.  
2220_X_S  
B. Check set temperature.  
Try to lower set  
temperature by Temperature  
setting button “COOLER”.  
YES  
• Set “Operation selector”  
switch to TEST in the  
indoor unit.  
Outdoor unit runs.  
Is room temperature too  
low ?  
NO  
• Try to run both indoor and  
outdoor units with another  
remote control unit.  
OK  
The other remote control  
unit is defective.  
2221_X_S  
SM830092  
– 44 –  
12. SERVICE PROCEDURES  
C. Check compressor motor magnetic contactor.  
• Check coil resistance of  
compressor motor magnetic  
contactor.  
(52C)  
1035_X_S  
D. Check indoor unit P.C.B.  
• Check P.C.B. Ass’y.  
• Check voltage between  
terminals No.2 and No.4 at  
terminal plate.  
No voltage appears.  
P.C.B. Ass’y is defective.  
0628_X_S  
E. Check outdoor unit P.C.B. (CL2462R Type)  
• Check P.C.B. Ass’y.  
• Check voltage between  
terminals L1 and L2 at  
terminal plate.  
No voltage appears.  
P.C.B. Ass’y is defective.  
1036_X_S  
SM830092  
– 45 –  
12. SERVICE PROCEDURES  
4) Indoor Unit does not Run.  
(Indoor fan and flap motor do not run.)  
P.C.B. Ass’y is defective.  
0630_X_S  
5) Some Part does not Operate.  
A. Indoor fan does not run.  
Check fan casing  
for foreign matter  
on the inside.  
Remove foreign  
matter or repair.  
Fan cannot  
be rotated.  
• Check fan rotation.  
Rotate the fan gently once  
or twice by hand.  
Fan motor burnout  
or foreign matter  
in bearing.  
Repair or replace.  
• Check resistance of fan  
motor winding.  
OK  
• Check fan motor capacitor.  
OK  
Relay RY1 or RY2 on the  
P.C.B. Ass’y is defective.  
0631_X_S  
B. Flap motor does not run.  
• Check resistance of  
flap motor winding.  
OK  
P.C.B. Ass’y or remote  
control unit is defective.  
2222_X_S  
SM830092  
– 46 –  
12. SERVICE PROCEDURES  
6) Outdoor Fan does not Run.  
• Check fan casing  
for foreign matter  
on the inside.  
Remove foreign  
matter or repair.  
Fan cannot  
be rotated.  
• Check fan rotation.  
Rotate the fan gently once  
or twice by hand.  
• Fan motor burnout  
or foreign matter  
in bearing.  
Repair or replace.  
• Check resistance of fan  
motor winding.  
OK  
• Check fan motor capacitor  
• Check continuity between  
terminals on the compressor  
motor magnetic contactor.  
0633_X_S  
7) Outdoor Fan Speed is not Switched from High to Low even when the Outdoor  
Temperature Falls below 78 °F. (C2462R Type)  
• Check the thermostat (23S).  
1037_X_S  
8) Outdoor Fan Speed is not Switched from High to Med even when the Outdoor  
Temperature Falls below 77 °F.  
Outdoor Fan Speed is not Switched from Med to Low even when the Outdoor  
Temperature Falls below 59 °F. (CL2462R Type)  
• Check outdoor unit P.C.B.  
Ass’y  
OK  
• Check resistance of outdoor  
temp sensor.  
0722 _X_S  
SM830092  
– 47 –  
12. SERVICE PROCEDURES  
9) Outdoor Fan does not Run for CL2462R.  
• Check fuse on PCB Ass’y in  
outdoor unit for continuity.  
If fuse blows,  
• Check resistance of primary  
winding of transformer.  
(TR)  
1038_X_S  
10) Compressor does not Run.  
• Check compressor motor capacitor  
(RC1).  
Wait for 30 minutes until com-  
pressor has cooled.  
OK  
Compressor runs.  
Compressor internal thermal  
protector is operated.  
• Check PTC.  
OK  
• Check resistance of compressor  
motor winding.  
• Check power supply voltage.  
Is voltage abnormally low?  
NO  
• Is outdoor heat exchanger coil dirty  
or are there obstacles near air  
suction inlet?  
1039_X_S  
SM830092  
– 48 –  
12. SERVICE PROCEDURES  
11) Poor Cooling.  
Check installation position  
of remote control unit.  
• Does cool air from air condi-  
tioner reach remote control  
unit directly ?  
Change installation  
position of remote  
control unit.  
YES  
NO  
Insulate wide tube and  
then execute taping with  
narrow tube.  
• Is wide tube between indoor unit  
and outdoor unit insulated ?  
YES  
Temperature  
difference  
is small.  
Possibility of  
Charge  
• Measure temperatures of suction  
and discharge air of indoor unit.  
refrigerant  
shortage.  
refrigerant  
Temperature difference between  
suction and discharge air is  
large enough (Approx. 10 deg. or more).  
• Check clogging of air  
filter.  
Clean filter.  
Air filter is clogged.  
YES  
Set fan speed to either  
HIGH or MEDIUM.  
• Is fan speed set to LOW ?  
• Review cooling load estimate,  
if performance of air conditioner  
is normal.  
Reduce cooling load or  
replace the unit with  
higher cooling capacity.  
1040_X_S  
12) Excessive Cooling.  
Set the temperature to  
higher value using  
temperature setting  
button of the remote  
control unit.  
YES  
NO  
• The set temperature is too low.  
• Is the remote control unit installed  
at a place where it can  
detect the room temperature  
properly ?  
Change installation  
position of the remote  
control unit.  
0637_X_S  
SM830092  
– 49 –  
12. SERVICE PROCEDURES  
(2) A Sensor is Defective.  
Indoor (heat exchanger) coil temp. Sensor is defective.  
1
(a) Open (=No continuity in sensor)  
Compressor and outdoor fan repeat ON for 10 minutes and OFF for 6 minutes  
when sensor opens.  
(b) Short  
“Freeze Prevention” does not operate when dehumidified water is frozen on the  
indoor coil.  
Room temp. Sensor (in the remote control unit) is defective.  
2
(a) Open (=No continuity in sensor)  
Neither outdoor fan nor compressor runs.  
(b) Short  
Outdoor fan and compressor do not stop. — Excessive cooling.  
SM830092  
– 50 –  
12. SERVICE PROCEDURES  
Earthed wire  
(3) Checking the Electrical Components  
Clip  
1) Measurement of Insulation  
Resistance  
The electrical insulation is acceptable  
Probe  
when the resistance exceeds 2 M.  
Insulation  
tester  
Fig. 16  
0638_X_S  
Power Supply Wires  
1
Terminal plate  
Clamp the earthed wire of the Power  
Supply wires with a lead clip of the  
insulation resistance tester and mea-  
sure the resistance by placing a probe  
on either of the power wires. (Fig. 16)  
Probe  
Then measure the resistance between  
the earthed wire and the other power  
wires. (Fig. 16)  
Indoor Unit  
2
Clip  
Clamp an aluminum plate fin or copper  
tube with the lead clip of the insulation  
resistance tester and measure the  
resistance by placing a probe on the  
terminal plate (Fig. 17)  
Copper  
tube or  
metallic part  
Insulation  
tester  
Fig. 17  
0639_X_S  
Outdoor Unit  
3
Probe  
Measure the resistance by placing a  
probe on the terminal plate in the same  
manner as explained above 2 . (Fig. 17)  
Clip  
Measurement of Insulation Re-  
sistance for Electrical parts  
4
Copper  
tube or  
metallic part  
• Disconnect the connector of the  
desired electric part from terminal  
plate, P.C.B. Ass’y, etc. (Fig. 18)  
Insulation  
tester  
Fig. 18  
0640_X_S  
Similarly, disconnect the lead wires from  
compressor, capacitor, etc. (Fig. 19)  
From fan motor,  
compressor and other  
parts.  
• Measure the resistance in the same  
manner as illustrated on the right.  
Probe  
Metallic  
part  
Refer to Electrical Wiring Diagram.  
Clip  
NOTE  
If the probe does not enter the hole  
because the hole is too narrow, use a  
probe with a thinner pin.  
Insulation  
tester  
Fig. 19  
SM830092  
0641_X_S  
– 51 –  
12. SERVICE PROCEDURES  
2) Checking the Protective Devices  
• Disconnect the connector, which consists of P (plug) and S (socket) when you want to check the  
protective device.  
• Then check continuity among plug’s (and/or socket’s) terminal as in Fig. 20.  
• The Protective Device is proved normal if there is a continuity between terminals.  
socket  
Multimeter  
Fig. 20  
0642_X_S  
Indoor fan motor thermal protector (49FI) . . . . . . Indoor unit  
1
• Disconnect the connector which leads to the indoor fan motor (FMI).  
• Check the socket’s terminals.  
Compressor motor thermal protector . . . . . . Outdoor unit  
2
• Disconnect the wires from terminals of compressor.  
• Check the terminals of compressor.  
Outdoor fan motor thermal protector (49FO) . . . . . . Outdoor unit  
3
• Disconnect both the connector which leads to the outdoor fan motor (FMO).  
• Check socket’s terminal.  
SM830092  
– 52 –  
12. SERVICE PROCEDURES  
3) Checking the Electrical Parts  
Power transformer ...........................Indoor unit  
*Measure the coil resistance.  
1
• Primary 230-208 V ; Measure the resistance between two WHT lead wire terminals  
of socket connected to power transformer.  
• Secondary 19 V ; Measure the resistance between two BRN lead wires.  
Power transformer (TR) ................. Outdoor unit *Measure the coil resistance.  
2
• Primary 230-208 V ; Measure the resistance between two WHT lead wire terminals  
of socket jointed to power transformer.  
• Secondary 19 V  
; Measure the resistance between two BRN lead wires.  
Indoor fan motor (FMI) ............... Indoor unit  
*Measure the coil resistance.  
3
• Measure the resistance between each terminal of the socket connected to the  
indoor fan motor.  
Outdoor fan motor (FMO) ........... Outdoor unit  
*Measure the coil resistance.  
4
• Measure the resistance in the same manner as explained above 2 .  
Motor capacitor ............ Both in indoor and outdoor unit  
5
• Remove the lead wires from the  
capacitor terminals, and then place a  
probe on the capacitor terminals as  
shown in Fig. 21. Observe the deflec-  
tion of the pointer, setting the resis-  
tance measuring range of the multim-  
eter to the maximum value.  
Multimeter  
• The capacitor is “good” if the pointer  
bounces to a great extent and then  
gradually returns to its original posi-  
tion.  
NOTE  
The range of deflection and the deflection  
time differ according to the capacity of the  
capacitor.  
Compressor motor  
capacitor  
Fan motor  
capacitor  
1041_X_S  
Fig. 21  
SM830092  
– 53 –  
12. SERVICE PROCEDURES  
Continuity of fuse on P.C.B.  
Ass’y  
6
• Check for continuity using a multim-  
eter as shown in Fig. 22.  
Fuse  
NOTE  
Method Used to Replace Fuse on  
PCB Ass’y  
1042_X_S  
1. Remove the PCB Ass’y from the  
electrical component box.  
Fig. 22  
Soldering iron  
2. Remove the fuse from PCB Ass’y  
using pliers while heating the sol-  
dered leads on the back side of the  
PCB Ass’y with a soldering iron (30W  
or 60W). (Fig. 23)  
PCB Ass’y  
Fuse  
Varistor  
3. For replacement, insert a fuse of the  
same rating to the intended position  
and solder it.  
(Allow time to radiate heat during sol-  
dering so that the fuse does not melt.)  
Pliers  
1043_X_S  
When replacing the  
fuse, be sure not to  
break down the  
Fig. 23  
CAUTION  
varistor.  
SM830092  
– 54 –  
12. SERVICE PROCEDURES  
11. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN INSTALLING UNIT  
11-1. Characteristics of New Refrigerant R410A  
11-1-1. What is New Refrigerant R410A?  
R410A is a new refrigerant that contains two types of pseudo-non-azeotropic refrigerant mixture which do  
not adversely affect the earth’s ozone layer. Its refrigeration capacity and energy efficiency are about the  
same level as the conventional refrigerant, R22.  
11-1-2. Components (mixing proportions)  
HFC32 (50%) / HFC125 (50%)  
11-1-3. Characteristics  
Less toxic, more chemically stable refrigerant  
The composition of refrigerant R410A changes whether it is in a gaseous phase or liquid phase. Thus, when  
there is a refrigerant leak the basic performance of the air conditioner may be degraded because of a change  
in composition of the remaining refrigerant. Therefore, do not add new refrigerant. Instead, recover the  
remaining refrigerant with the refrigerant recovery unit. Then, after evacuation, totally recharge the specified  
amount of refrigerant with the new refrigerant at its normal mixed composition state (in liquid phase).  
When refrigerant R410A is used, the composition will differ depending on whether it is in gaseous or liquid  
phase, and the basic performance of the air conditioner will be degraded if it is charged while the refrigerant  
is in gaseous state.  
Thus, always charge the refrigerant while it is in liquid phase.  
Ether-type oil is used for compressor oil for R410A-type units, which is different  
CAUTION  
from the mineral oil used for R22. Thus more attention to moisture prevention and  
faster replacement work compared with conventional models are required.  
11-2. Checklist Before Installation  
Use a clutch-type flare tool for R410A or the conventional flare tool. Note that sizes of the resultant flares differ  
between these two tools. Where a conventional flare tool is used, make sure to observe A Specification  
(amount of protrusion).  
A Specification  
Diameter of tube (ø) D  
Flare tool for R410A  
0 – 0.5 mm  
Conventional flare tool (for R22)  
1.0 – 1.5 mm  
ø6.35 (1/4")  
ø19.05 (3/4")  
0 – 0.5 mm  
1.0 – 1.5 mm  
Size of flare  
D
D
A
A
Flare tool for R410A  
Conventional flare tool (R22)  
Flare nut: Because the new refrigerant R410A operates at 1.6 times higher pressure than the conventional  
refrigerant R22, the flare nuts that came with the unit must be used.  
SM830092  
– 55 –  
12. SERVICE PROCEDURES  
Tubing precautions  
Refrigerant R410A is more easily affected by dust or moisture compared to R22, thus be sure to temporarily  
cover the ends of the tubing with caps or tape prior to installation.  
Never use 0.7mm-thick copper tubing or tubing which is less than 0.8mm in thickness, since air conditioners  
with R410A are subject to higher pressure than those using R22 and R407C.  
Outer diameter: mm (inch)  
ø6.35 (1/4")  
Tubing wall thickness: mm (inch)  
0.8 (0.032)  
Narrow tube  
Wide tube  
ø19.05 (3/4")  
1.0 (0.042)  
No addition of compressor oil for R410A  
No additional charge of compressor oil is required.  
No use of refrigerant other than R410A  
Never use a refrigerant other than R410A.  
If refrigerant R410A is exposed to fire  
Through welding, etc., toxic gas may be released when R410A refrigerant is exposed to fire. Therefore, be  
sure to provide ample ventilation during installation work.  
Caution in case of R410A leak  
Check for possible leak points with the special leak detector for R410A. If a leak occurs inside the room,  
immediately provide thorough ventilation.  
SM830092  
– 56 –  
12. SERVICE PROCEDURES  
11-3. Tools Specifically for R410A  
For servicing, use the following tools for R410A  
Tool Distinction  
Gauge manifold  
Tool Name  
Charging hose  
Gas leak detector  
Refrigerant cylinder  
Charging cylinder  
Refrigerant recovery unit  
Vacuum pump with anti-reverse flow ( 1)  
Tools specifically for R410A  
(Solenoid valve-installed type, which prevents oil from flowing back into the  
unit when the power is off, is recommended.)  
Vacuum pump ( 2) … can be used if the following adapter is attached.  
Vacuum pump adapter (reverse-flow prevention adapter) ( 3).  
(Solenoid valve-installed adapter attached to a conventional vacuum pump.)  
Electronic scale for charging refrigerant  
Flare tool  
Bender  
Tools which can be com-  
monly used for R22,  
R407C, and R410A  
Torque wrench  
Cutter, reamer  
Welding machine, nitrogen gas cylinder  
The above tools specifically for R410A must not be used for R22 and R407C.  
Doing so will cause malfunction of the unit.  
CAUTION  
For the above vacuum pump ( 1, 2) and vacuum pump adapter ( 3), those for  
R22-type units can be used for R407C-type. However, they must be used exclu-  
sively for R410A and never alternately with R22 and R407C.  
To prevent other refrigerants (R22, R407C) from being mistakenly charged to this unit, sizes of the service  
ports and flare nuts of the narrow tube service valve and wide tube service valve have been altered.  
SM830092  
– 57 –  

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