Control Circuit Troubleshooting; Control Power Source Function Block; Indoor Unit - Mitsubishi Electric PU(H)Y-P250YGM-A Service Handbook

[ IX Troubleshooting ]
-7- Control Circuit

(1) Control power source function block

P250 model
AC 380~415 V TB1
Terminal block for
Noise filter
power source
52C1
Solenoid valve
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 220~240 V
TB15
TB5
A, B or 1, 2
DC 8.5 ~ 12 V
Rectifier 52C1
Fuse (6.3 A)
Heat
exchanger
fan
52C1
Relay, LEV
Drive circuit
Transformer
5V
5 V Power supply
CN40
Terminal block for
power source
Terminal block
for MA remote
controller
Terminal block
for transmission
line connection
DC 17 ~ 30 V
MA remote
controller
Smoothing capacitor
Fuse
(10 A)
IPM
Fuse
(2 A)
IPM drive circuit
Microcomputer
DC / DC converter
5V
5 V Power supply
15V
15 V Power supply
Rectifier
12V
Fan INV board
12V Power supply
7 V Power supply
Power supply for centralized
control
Power supply for
indoor transmission line

Indoor unit

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Power source system
Control system (DC 5 ~ 30 V)
Inverter Compressor
G / A board
IPM drive circuit
15V
15 V Power supply
12V
12 V Power supply
5V
5 V Power supply
Cooling fan
Cooling fan
Drive circuit
Microcomputer
7V
30V
30 V
Power supply