Mitsubishi Electric PUMY-P112VKM1 Service Manual page 25

PUMY-P112YKM1(-BS)
SYMBOL NAME
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>
RS Rush Current Protect Resistor
LEV-A,LEV-B Electronic Expansion Valve
ACL4 Reactor
DCL Reactor
P.B. Power Circuit Board
TB-U/V/W Connection Terminal<U/V/W-Phase>
TB-L1/L2/L3
Connection Terminal<L1/L2/L3-Power Supply>
Connection Terminal
TB-P1/P3
X52CA/B 52C Relay
Noise Filter Circuit Board
N.F.
LO1/LO2/LO3
Connection Terminal<L1/L2/L3-Power Supply>
LI1/LI2/LI3/NI Connection Terminal<L1/L2/L3-Power Supply>
GD1,GD3 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>
LED1,LED2 LED<Operation Inspection Display>
LED3
LED<Power Supply to Main Microcomputer>
F1,F2 Fuse<T6,3AL250V>
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 [570 V] in the main capacitor will drop to 20 V in approx. 5
!
minutes (input voltage: 400 V). When servicing, make sure that LED1, LED2 on the outdoor circuit board goes out, and then
wait for at least 5 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 2
Compressor
Indication 52C 21S4
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-P125YKM1(-BS)
63LS
MULTI. B.
MF1
CNF1
1
7
(WHT)
MF2
CNF2
1
7
(WHT)
1
2
3
CNDC
(PNK)
52C 21S4
1 3 1 3
(BLK) (GRN)
21S4
TB3
2
RED
M1
M2
RED
S
TO INDOOR UNIT
CONNECTING WIRES
DC 30V(Non-polar)
TB7
YLW 2
M1
M2
YLW
S
FOR CENTRALIZED
CONTROL
DC 30V(Non-polar)
TB1B
FUSE1
B1
FUSE2
B2
TO BRANCH BOX
TB1
L1
RED
L2
POWER
WHT
SUPPLY
L3
3N
BLK
400V 50Hz
N
BLU
3 4 5 6
SV1 (SV2)
PUMY-P140YKM1(-BS)
63H
TH7 TH6 TH3 TH4 TH2
63HS
CN3D CN3S
1 3 1 4 1 2 2 1 1 2
(WHT) (RED)
63HS TH7/6 TH3 TH4 TH2
(WHT) (RED) (WHT) (WHT) (BLK)
1 3 1
1 3 1 3
63LS 63H
(BLU) (YLW)
CN2
(RED)
1 7
TRANS
7
F1
F2
LED3
SV2 SV1
1 3 1 3 1 3 SS 1 2 CNAC
(BLU) (GRY)
(WHT) (RED)
SV1
2
TH8
7
2
P. B.
1 2 1 2 1
CN6 CN5 CN2
(RED)
(WHT) (RED)
BLK
X52C
WHT
X52C
+
-
-
+
+ + +
+ + +
V
W
U
2
MC
CNAC1
1 3 (WHT)
LI1
LI2
LI3
NI
GD1 GD3
N. F.
[Example]
When the compressor and
SV1 are turned during cooling
operation.
1 2 3 4 5 6 7 8
7 8
Always lit
25
LEV-A LEV-B
M M
is the switch position.
CN3N
SWU2 SWU1 SW9
(BLU)
3 1 3 1 5 1 5
SW1
CNLVA CNLVB
(WHT) (RED)
SW4
1 5
CN51
(WHT)
LED1
CN4
(WHT)
2
1
2
CNS1 CNS2
CN41 CN40
(RED) (YLW)
(WHT) (WHT)
2 1 2 1 4 1 4 1
2 2
M-NET P.B.
2
BLK
7 1 2
CN4
(WHT)
L3OUT TB-L3
BLK
B
RED RED
RS
A
RED
TB-L1
DCL
2 2
CNAC2
CNCT
1 2
1 3
(RED)
(RED)
LO1
RED
LO2
WHT
LO3
BLK
+
+
-
1 3 1
3
CNL
CNDC
(PNK) (BLU)
ACL4
2
1 MODEL SELECTION
The black square( )indicates a switch position.
MODELS
PUMY-P112YKM1
PUMY-P125YKM1
PUMY-P140YKM1
SW5 SW6
SW8 SW2
SW3 SW7
LED2
CN102
(WHT)
4 1
4
1 4
CN2
(WHT)
TB1
CN1
(WHT)
1
5 3
2
SW4 SW8
ON ON
OFF OFF
1 2 3 4 5 6 1 2
ON ON
OFF OFF
1 2 3 4 5 6 1 2
ON ON
OFF OFF
1 2 3 4 5 6 1 2