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[Example]
When the compressor and
SV1 are turned on during cooling
operation.
Bit
Indication
1
Compressor
operated
2
52C
3
21S4
4
SV1
5
(SV2)
67
—
—
8
Always lit
When fault requiring inspection has occurred
The LED alternately indicates the inspection code and the location of the unit in which the fault has occurred.
NOTES:
1.Refer to the wiring diagrams of the indoor units for details on wiring of each indoor unit.
Self-diagnosis function
The indoor and outdoor units can be diagnosed automatically using the self-diagnosis switch (SW1) and LED1, LED2 (LED indication) found on
the multi-controller of the outdoor unit.
LED indication : Set all contacts of SW1 to OFF.
· During normal operation
The LED indicates the drive state of the controller in the outdoor unit.
SYMBOL NAME
TB1 Terminal Block <Power Supply>
TB3 Terminal Block <Comunication Line>
TB7 Terminal Block <
Centralized Control Line>
MC Motor For Compressor
MF1,MF2 Fan Motor
21S4 Solenoid Valve<Four-Way Valve>
SV1 Solenoid Valve<Bypass valve>
TH3
Thermistor<Outdoor Pipe>
TH4 Thermistor<Discharge>
TH6 Thermistor<Low Pressure Saturated>
TH7
TH8
Thermistor<Outdoor>
Thermistor<Heatsink>
63HS High Pressure Sensor
63H High Pressure Switch
63L Low Pressure Switch
CE Main Smoothing Capacitor
ACTM
DCL
Active Filter Module
P.B. Power Circuit Board
Power Module
Connection Terminal<U/V/W-Phase>
TABU/V/W
C.B.
Fuse<T6,3AL250V>
F1,F2
Switch<Display Selection>
SW1
Switch<Function Selection>
SW2
Switch<Test Run>
SW3
Switch<Model Selection>
SW4
Switch<Function Selection>
SW5
Switch<Function Selection>
SW6
Switch<Function Selection>
SW7
Switch<Function Selection>
SW8
Switch<Unit Address Selection, 1st digit>
SWU1
Switch<Unit Address Selection, 2nd digit>
SWU2
LED<Operation Inspection Display>
LED1,LED2
LED<Power Supply to Main Microcomputer>
LED3
Controller Circuit Board
Connector<Connection For Option>
SS
Connector<Connection For Option>
CN3D
Connector<Connection For Option>
CN3S
Connector<Connection For Option>
CN3N
Connector<To N.F. Board CN52C>
(Symbol of Board is CNLVB)
CNLVB
Connector<Connection For Option>
CN51
Relay
X501~505
M-NET P.B.
ConnectionTerminal<Ground>
M-NET Power Circuit Board
TP1
Connection Terminal<L/N-Phase>
TABS/T
Connection Terminal<DC Voltage>
TABP1/P2/P
Connection Terminal<DC Voltage>
Diode Bridge
TABN1/N2/N
N.F. Noise Filter Circuit Board
Connection Terminal<L-Phase>
LI/LO
Connection Terminal<N-Phase>
NI/NO
Connection Terminal<Ground>
EI,E2
52C Relay
52C
IPM
DS2,DS3
Reactor
Cautions when Servicing
!
WARNING: When the main supply is turned off, the voltage [340 V] in the main capacitor will drop to 20 V in approx. 2 minutes (input voltage: 240 V).
When servicing, make sure that LED1, LED2 on the outdoor circuit board goes out, and then wait for at least 1 minute.
Components other than the outdoor board may be faulty: Check and take corrective action, referring to the service manual.
Do not replace the outdoor board without checking.
CNDC
(PIN)
CNAF
(WHT)
CN2
(WHT)
CN3
(WHT)
CN4
(WHT)
CN5
(RED)
CNAC2
(RED)
E I
E2
CN5
(RED)
CN52C
(BLK)
CNAC1
(WHT)
LO
NO
L I
N I
TABP2
TABU
TABW
TABN2
TABN1
TABV
TH8
IPM
CE
TABN
TABP
TABP1
TABT
DS3
DS2
TABS
RED
BLU
BLU
BLU
WHT
WHT
52C
RED
RED
BLK
BLK
BLK
WHT
RED
RED
RED
RED
RED
WHT
YLW
YLW
P. B.
N. F.
+
+
-
+
BLK
BLK
WHT
WHT
W
V
U
RED
MC
MS
3~
DCL
N1
L1 L2
N2
Io
M1
M2
S
TB3
TO INDOOR UNIT
CONNECTING WIRES
DC 30V(Non-polar)
FOR CENTRALIZED
CONTROL
DC 30V(Non-polar)
M1
M2
S
TB7
2
2
2
GRN/YLW
BLU
RED
POWER SUPPLY
~/N 230V 50Hz
TB1
L
N
CN51
(WHT)
SW6
SW2SW8SW1
SW7SW3SW4
w
1
SW5
SWU2SWU1
TRANS
LED1
CN2
(WHT)
CN4
(WHT)
LED3
CN3D
(WHT)
CN3S
(RED)
CN3N
(BLU)
CN2
(WHT)
CN1
(WHT)
TP1
BLK
CNDC
(PNK)
t°
t°
t° t° t°
MF1
MS
3~
141
1
1
7
3
131313
1
1
3
3
13
3
2
2112
1
2
2
1
2
1
2
22
12 12
TH7 TH6 TH3 TH4
63HS
63H
63L
CNF1
(WHT)
MF2
MS
3~
1
7
1
7
7
1
5
CNF2
(WHT)
TH7/6
(RED)
16
CNLVB
(RED)
16
4
TH3
(WHT)
TH4
(WHT)
63HS
(WHT)
63H
(YLW)
63L
(RED)
MULTI. B.
LED2
M-NET P.B.
52C
(BLK)
1
3
1
3
1
3
1
3
X505
21S4
(GRN)
SV1
(WHT)
SV2
(BLU)
SS
(WHT)
21S4
SV1
CNAC
(RED)
CNS1
(RED)
CNS2
(YLW)
F1
F2
X504
X503
X502
X501
CN102
(WHT)
4
1
CN40
(WHT)
4
1
4
4
1
5
1
CN41
(WHT)
4
1
4
2
2
2
2
2
2
4
1
2
1
1
6
1
7
7
2
2
2
2
1
1
2
1
2
-
-
+
+
U
U
2
1
3
U
P
ACTM
-
+
1
3
w1 MODEL SELECT 1:ON 0:OFF
MODELS
PUMY-P100VHMA
PUMY-P125VHMA
PUMY-P140VHMA
123456
010010
010001
010011
SW4
PUMY-P100VHMA PUMY-P125VHMA PUMY-P140VHMA
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