32
7.2 CU-4E27QBR
C
NTR
B
ARD
Y/G
BL
BL
1
2
3
W
W
BL
R
1
CN-COM
(WHITE)
FUSE 401
(30A 250V)
ACL1
(BLACK)
ACN1
(WHITE)
FG1
(GREEN)
FG2
(GREEN)
DCP
(
RED
)
DCN
(
BLACK
)
CN-BLK (BLACK)
REACTOR
GRY
RY-PWR
SMOOTHING
CAPACITOR
PFC
CAPACITOR
ELECTRONI C CONTROLLER
(NOISE FILTER)
ELECTRONIC
CONTROLLER
(DISPLAY)
PFC
CIRCUIT
AC-WHT
(
WHITE
)
RAT1
(
GRAY
)
DCP
(
RED
)
DCN
(
BLACK
)
AC1
(
BROWN
)
Q10
(
RED
)
U
(
YELLOW
)
(
BLUE
)
V
P
N
U
V
W
W
BR
W
R
R
R
R
1
1
1
1
10
11
1
1
4
4
2
4
7
CN-FM1
(WHITE)
CN-PSW1
(BLUE)
CN-TH3
(WHITE)
CN-TH4
(WHITE)
(WHITE)
CN-TH1
(YELLOW)
CN-TH2
t
t
t
t
t
t
t
t
t
t
t
t
FAN MOTOR
HIGH PRESSURE SW.
LIQUID PIPE TEMP. SENSOR
(UNIT A) (THERMISTOR)
LIQUID PIPE TEMP. SENSOR
(UNIT B) (THERMISTOR)
LIQUID PIPE TEMP. SENSOR
(UNIT C) (THERMISTOR)
LIQUID PIPE TEMP. SENSOR
(UNIT D) (THERMISTOR)
(5k, 3900)
GAS PIPE TEMP. SENSOR
(UNIT A) (THERMISTOR)
GAS PIPE TEMP. SENSOR
(UNIT B) (THERMISTOR)
GAS PIPE TEMP. SENSOR
(UNIT C) (THERMISTOR)
GAS PIPE TEMP. SENSOR
(UNIT D) (THERMISTOR)
(5k, 3900)
OUTDOOR TEMP.
SENSOR (THERMISTOR) (15k, 3950)
HEAT EXCHANGER TEMP.
SENSOR (THERMISTOR) (15k, 3950)
DEFROST TEMP.
SENSOR (THERMISTOR) (5k, 3900)
M
B
B
Y
ORG
R
COMPRESSOR
CONNECTOR
WHITE
MS
3~
B
Y
RBL
AC-BLK
(
BLACK
)
AC2
(
BLUE
)
FUSE 1
(T3.15A
L250V)
CN-DAT A
(
WHITE
)
RAT2 (GRAY)
AC1
(BROWN)
AC2 (BLUE)
CN-WHT
(
WHITE
)
W
BL
GRY
BR
B
1
W
W
W
W
W
W
W
W
W
1
99
NOISE FILTER
CIRCUIT
COMMUNICATION
CIRCUIT
RECTIFICATION
CIRCUIT
G
G
CONTROL BOARD
3
5
7
9
1
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
1
1
6
11
7
1
1
3
3
1
1
8
6
7
CN-DISP1
(WHITE)
CN-DISP1
(WHITE)
CN-DISP2
(WHITE)
CN-NMODE
(YELLOW)
CN-NMODE1
(WHITE)
CN-HOT
(BLUE)
(WHITE)
CN-EV1
(YELLOW)
CN-EV2
1
6
(BLUE)
CN-EV3
17
(RED)
CN-EV4
12
MMMM
(WHITE)
CN-DIS
DISCHARGE TEMP.
SENSOR (THERMISTOR) (50k, 3950)
UNIT D
ELECTRO-
MAGNETIC COIL
(EXPANSION
VALVE )
UNIT C
ELECTRO-
MAGNETIC COIL
(EXPANSION
VALVE )
UNIT B
ELECTRO-
MAGN E T IC CO IL
(EXPANSION
VALVE)
UNIT A
ELECTRO -
MAGNETIC COIL
(EXPANSION
VALVE)
ELECTRO MAGNETIC
COIL (4-WAY VALVE)
HEATER
CN-HT
(BLACK)
RY-HOT
RY-HT
14
8
B
Y
ORG
W
L
N
TERMINAL BOARD
TERMINAL BOARD
TO INDOOR UNIT A
1
2
3
BL W
TO INDOOR UNIT B
1
2
3
BL W
TO INDOOR UNIT C
1
2
3
TO INDOOR UNIT D
OWER SUPPLY
INGLE PHASE
C 230V
0Hz
RECTIFICATION
CIRCUIT
SWITCHING
POWER SUPPLY
CIRCUIT
ELECTRONIC CONTROLLER
(MAIN)
FUSE 2
(T3.15A L250V)
CN-DAT A
(
WHITE
)
5V
5V
5V
5V
PUMP DOWN
SW1
1
2
3
4
OPERA TION TEST
SW2
1
2
3
4
WIRING CHECK
SW3
SW4 PO WER SAVE
ON OFF
1
2
321
3
4
SW5 PRIORI TY MODE
COOL ONL Y
GREEN LED1
R304
JP1
ON OFF
321
R305
R306
R307
R308
R309
GREEN LED2
GREEN LED3
GREEN LED4
GREEN LED5
GREEN LED6
5V
13V
R366R365
R368
b
D33
C218 D34 C219 D35
C220 D36
C47
R102
C209
C62
D60
D59
D58
D57
D61
D65
D69
D70
D71
D72
D66
D67
D68
D62
D63
D64
c
e
13V
b
c
e
b
c
e
b
c
e
5V
5V
R103
C48
5V
R100
C45
R101
C46
5V
R341
R342
R336
R339
R340
C239
C240
C235
C237
C238
5V
R333
R338
R334
R335
R337
C232
C241
C233
C234
C236
13V
5V
R138
10k
10k
4.7k
4.7k
C65 R140
R139
R132
R271
Q24
D78
RY -PWR
e
c
b
b
c
e
b
c
e
10k
10k
Q30
Q32
Q31
10k
4.7k
4.7k
4.7k
b
c
e
15V_2
b
c
e
5V
5V
R327
C230C227C229R330
R326
R328C231
R86
C228
R332
R331R329
5V
5V
5V
R463
D403
ZD403
ZD401
R402
R401
PC401
PC402
R410
R411
R408
R409
R412
Q401
b
c
e
R413
4
3
1
2
ZD402
D401
R406 R407
D402
C414
R405
R403
1
2
4
3
R404 C413
ZD404
R414
5V
5V
5V
5V
5V
5V
5V
5V
5V
5V
5V
5V
ZD407
R424
R420
PC404
PC403
R419
R426
R423
R421
R425
Q402
b
c
e
R415
4
3
1
2
ZD406
R416 R417
D404
C415
R422
R418
1
2
4
3
ZD408
R438
R435
PC405
PC406
R427
R437
R429
R430
R428
Q403
b
c
e
R431
4
3
1
2
ZD409
R433 R434
D405
C416
R436
R432
1
2
4
3
ZD410
R439
R440
PC408
PC407
R449
R443
R444
R442
R447
Q404
b
c
e
R446
4
3
1
2
ZD411
R445 R450
D406
C417
R441
R448
1
2
4
3
ZD412
R452
R455
PC410
PC409
R454
R457
R460
R451
R462
Q405
b
c
e
R459
4
3
1
2
ZD413
R453 R456
D407
C418
R461
R458
1
2
4
3
5V
13V
5V
13V
Q27Q29Q26Q25
Q34
b
c
e
R367
W
W
W
CN-DEMAND
(WHITE)
CN-DEMAND
TO CZ-CAP2
(OPTIONAL DEMAND
CONTROL)
1
3
CONNECTOR (WHITE)
5V
C283
0.047u
25V
C282
0.047u
25V
KB
KB
R390
R391
10k
10k
Compressor Temp. Sensor
(Thermistor) Characteristics
70
60
50
40
30
20
20 40 60 80 100 120 140
10
0
Resistance (kΩ)
Temperature (°C)
Sensor (Thermistor)
Characteristics
Outdoor Air Sensor
Outdoor Heat Exchanger
Sensor
70
60
50
40
30
20
-10 0 10 20 30 40 50
10
0
Resistance (kΩ)
Temperature (°C)
R256
10k
R386
10k
R146
10k
R147
10k
5V
R395
10k
5V
5V
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