Mitsubishi Electric City Multi PUHY-P500YSHM-A Service Handbook page 46

[ III Outdoor Unit Components ]
4. Fan board
CNVDC
Bus voltage input
N
P
CNINV
Inverter output
W
V
U
R630,R631
Overcurrent detection
resistor
HWE07150
CN18V
Input 18VDC
GND
DIP IPM Rear
- 37 -
LED3 CN4
GND
Lit during normal
Serial communication signal output
CPU operation
CN5
GND （Control board）
Serial communication signal output
CN21
Serial communication signal output
GND （INV board）
Input 17VDC
CN22
GND （INV board）
Input 5VDC
Serial communication signal input
GND （INV board） ）
Output 17VDC
THBOX
Thermistor
(Control box internal temperature
detection)
LED1
Inverter in normal operation
LED2
Inverter error
GB