Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 357

[ IX Troubleshooting ]
P168 - P234 models
AC 208 / 230 V TB1
Terminal block for
power source
52F
52C2
Relay board
Surge protection
52F
52C2
Drive circuit
52C1
52C1 Relay, LEV
Solenoid valve Drive circuit
4-way valve
TB7
Microcomputer
Terminal block for
transmission line
for centralized control
(DC 24 ~ 30 V)
TB3
Indoor/outdoor
transmission block
Main board
(DC 24 ~ 30 V)
M-NET
transmission line
(Non-polar 2 wire)
TB2
Terminal block for
power source
TB15
TB5
To next unit
(Indoor unit)
A, B
DC 17 ~ 30 V
A, B or 1, 2
DC 8.5 ~ 12 V
* MA remote controllers and M-NET remote controllers cannot be used together.
Fuse (63 A) 52C2
Rectifier Noise filter
52C1
Fuse (6A)
Heat
exchanger
fan
52F
Heat
exchanger
fan
Transformer
Fan INV board
5 V Power supply
CN40
Indoor unit
Terminal block for
power source
Terminal block
for transmission
line connection
DC 17 ~ 30 V
M-NET remote
controller
MA remote
controller
51C2
Smoothing capacitor
Fuse Fuse
IPM drive circuit
(15 A) (3 A)
DIP - IPM
IPM drive circuit
Microcomputer
DC / DC converter
5 V Power supply
15 V Power supply
Rectifier
12V Power supply
7 V Power supply
Power supply for centralized
control (TB7 side)
30 V
Power supply
Power supply for
indoor transmission
line (TB3 side)
- 348 -
Power source system (AC 208 / 230 V)
Control system (DC 5 ~ 30 V)
No.2 Compressor
Inverter
No.1 Compressor
G / A board
15 V Power supply
12 V Power supply
5 V Power supply
Cooling fan
Cooling fan
Drive circuit
Microcomputer