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
Ω
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)
Ω
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
Ω
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
Ω
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
Ω
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)
Ω
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
Ω
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)
Ω
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)
Ω
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
Ω
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 MΩ or 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 MΩ.
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
Ω
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.
Ω
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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