Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 356

-9- Control Circuit
(1) Control power source function block
P72 - P144 models
AC 208 / 230 V TB1
Terminal block for
power source
Surge protection
52C1
52C1
Relay, LEV
Solenoid valve
Drive circuit
4-way valve
TB7
Terminal block for
Microcomputer
transmission line
for centralized control
(DC 24 ~ 30 V)
TB3
Indoor/outdoor
transmission block
(DC 24 ~ 30 V)
Main board
M-NET
transmission line
(Non-polar 2 wire)
TB2
AC 208 / 230 V
Terminal block for
power source
TB15
Terminal block
for MA remote
TB5
controller
To next unit
(Indoor unit)
Terminal block
for transmission
line connection
DC 17 ~ 30 V
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.
Rectifier 52C1
Noise filter
Fuse (6 A)
Heat
DIP - IPM
exchanger
fan
IPM drive circuit
Microcomputer
Transformer
5 V Power supply
15 V Power supply
Rectifier
Fan INV board
5 V Power supply
CN40
Indoor unit
M-NET remote
controller
MA remote
controller
- 347 -
Power source system (AC 208 / 230 V)
Control system (DC 5 ~ 30 V)
Inverter
Smoothing capacitor
G / A board
Fuse Fuse
IPM drive circuit
(15 A) (3 A)
15 V Power supply
DC / DC converter
12 V Power supply
5 V Power supply
12V Power supply
Microcomputer
7 V Power supply
Power supply for centralized
control (TB7 side)
Power supply for
30 V
indoor transmission
line (TB3 side)
Power supply
[ IX Troubleshooting ]
Compressor
Cooling fan
Cooling fan
Drive circuit