Wiring Diagram; Cautions When Servicing; During Normal Operation; When Fault Requiring Inspection Has Occurred - Mitsubishi Electric PUMY-P112VKM1 Service Manual

WIRING DIAGRAM

6
PUMY-P112VKM1(-BS)
SYMBOL
TB1 Terminal Block <Power Supply>
TB1B Terminal Block <Branch Box>
TB3
Terminal Block <Indoor/Outdoor, Branch
Box/Outdoor Transmission Line>
TB7 Terminal Block
<Centralized Control Transmission Line>
FUSE1,FUSE2 Fuse <T20AL250V>
MC Motor For Compressor
MF1,MF2 Fan Motor
21S4 Solenoid Valve<Four-Way Valve>
63H High Pressure Switch
63HS High Pressure Sensor
63LS Low Pressure Sensor
SV1 Solenoid Valve<Bypass valve>
TH2 Thermistor<Hic Pipe>
TH3 Thermistor<Outdoor Liquid Pipe>
TH4 Thermistor<Compressor>
TH6 Thermistor<Suction Pipe>
TH7 Thermistor<Ambient>
TH8 Thermistor<Heat Sink>
LEV-A,LEV-B Electronic Expansion Valve
DCL Reactor
CB Main Smoothing Capacitor
P.B. Power Circuit Board
U/V/W Connection Terminal<U/V/W-Phase>
LI Connection Terminal<L-Phase>
NI Connection Terminal<N-Phase>
N2 Connection Terminal<DC Voltage>
P2 Connection Terminal<DC Voltage>
DCL1,DCL2 Connection Terminal<Reactor>
IGBT Power Module
EI,E2,E3,E4 ConnectionTerminal<Electrical Parts Box>
MULTI.B. Controller Circuit Board
SW1 Switch<Display Selection>
SW2 Switch<Function Selection>
SW3 Switch<Test Run>
SW4 Switch<Model Selection>
SW5 Switch<Function Selection>
SW6 Switch<Function Selection>
SW7 Switch<Function Selection>
SW8 Switch<Model Selection>
SW9 Switch<Function Selection>
SWU1
Switch<Unit Address Selection, unit digit>
SWU2
Switch<Unit Address Selection, tens digit>
CNS1 Connector<Indoor/Outdoor, Branch Box/
Outdoor Transmission Line>
CNS2 Connector<Centralized Control Transmission Line>
SS Connector<Connection For Option>
CN3D Connector<Connection For Option>
CN3S Connector<Connection For Option>
CN3N Connector<Connection For Option>
CN51 Connector<Connection For Option>
LED<Operation Inspection Display>
LED1,LED2
LED3 LED<Power Supply to Main Microcomputer>
Fuse<T6,3AL250V>
F1,F2
X501~505 Relay
M-NET P.B. M-NET Power Circuit Board
TB1
ConnectionTerminal<Electrical Parts Box>

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: 230 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.
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.

2.During normal operation

The LED indicates the drive state of the controller in the outdoor unit.
Bit 1
Compressor
Indication
operated

3.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.
OCH576
PUMY-P125VKM1(-BS)
NAME
MULTI. B.
MF1
1
MF2
1
1
TB3
RED
M1
M2
RED
S
TO INDOOR UNIT
CONNECTING WIRES
DC 30V(Non-polar)
TB7
YLW
M1
M2
YLW
S
FOR CENTRALIZED
CONTROL
DC 30V(Non-polar)
TB1B
B1
B2
TO BRANCH BOX
POWER SUPPLY
230V 50Hz,60Hz
2 3 4 5
52C 21S4 SV1 (SV2)
PUMY-P140VKM1(-BS)
TH7 TH6 TH3 TH4 TH2
63LS 63HS
1 3 1 4 1 2 2 1 1
CNF1
63HS TH7/6 TH3 TH4 TH2
7
(WHT)
(WHT) (RED) (WHT) (WHT) (BLK)
CNF2
3 3
1 1
7
(WHT)
63LS
63H
(BLU) (YLW)
1
1
TRANS
2
3
CNDC
(PNK)
F1
F2
SV2
52C 21S4 SV1
3 1 3 1 3 1 3 1 3 SS
(BLK) (GRN) (BLU) (GRY)
(WHT)
21S4 SV1
7
2
1 2 1
CN4 CN2
(RED)
(WHT)
2
WHT
CB
+
RED
2
TH8
W V U
FUSE1
FUSE2
V
U
W
MC
TB1
RED
L
BLU
N
GRN/YLW
6 7 8
Always lit
24
63H LEV-A LEV-B
M M
CN3D CN3S CN3N
SWU2 SWU1 SW9
2
(WHT) (RED) (BLU)
1 3 1 3 1 3 1 5 1 5
CNLVA CNLVB
CN52C
(WHT) (RED)
(RED)
1 3
1 5
CN51
CN2
(WHT)
3
(RED)
7
CN4
(WHT)
7 2
1
2
CNS1 CNS2
CN41
LED3
(RED) (YLW)
(WHT)
1 2 CNAC 2 1 2 1 4 1
(RED)
2 2
2
3
CN52C
3
7 1 (RED)
52C
2
52C
CNDC
(PNK) 3
N2 1
+
P2
IGBT
-
+
E 4
DCL2 DCL1
E I
N I
DCL
[Example]
When the compressor and
SV1 are turned during cooling
operation.
1 2 3 4 5 6 7 8
is the switch position.
SW5 SW6
SW1 SW8 SW2
SW4 SW3 SW7
LED1 LED2
CN102
(WHT)
1
4
CN40
(WHT)
4 1
4
M-NET P.B.
1 4
CN2
(WHT)
TB1
BLK
CN1
(WHT)
1
5 3
2
P. B.
BLK
1 2
3
BLK
1 2
3
L I
1 MODEL SELECTION
The black square( )indicates a switch position.
MODELS
SW4 SW8
ON ON
PUMY-P112VKM1 OFF OFF
1 2 3 4 5 6 1 2
ON ON
PUMY-P125VKM1 OFF OFF
1 2 3 4 5 6 1 2
ON ON
PUMY-P140VKM1
OFF OFF
1 2 3 4 5 6 1 2