Outdoor Unit Circuit Board - Mitsubishi Electric PUHY-HP144TSHMU-A Service Handbook

[ III Outdoor Unit Components ]

[3] Outdoor Unit Circuit Board

1. Outdoor unit control board
CNDC
Bus voltage input
P
N
CNAC2
L1
N
CN505
72C
driving output
CN51
Output 12VDC
Compressor
ON/OFF output
Error output
Actuator
driving output
LED3
Lit
when powered
LED2
Lit during normal
CPU operation
LED3
Lit
when powered
CNAC
L1
N
HWE0716A
CN2
Serial communication signal input
CN801
GND INV board
Pressure switch
Output 17VDC
connection
F01 External signal input (contact input)
Fuse
250V AC／3.15A
CN102
Power supply input for centralized control system (30VDC)
Indoor/outdoor transmission line input/output (30VDC)
CN332
Output 18VDC
CN4
GND
GND
（Fan board）
Serial communication signal output
CN41
Power supply for
CN40 centralized control OFF
Power supply for
centralized control ON
CNS2
Transmission line input/output
for centralized control system (30VDC)
- 48 -
LEV
driving output
LED1
Service LED
SWU1,2
Address switch
SW1-5
Dip switch
Sensor input
CNVCC2
Output 12VDC
Output 5VDC
GND
CNIT
Output 12VDC
GND
Output 5VDC
Power supply detection input
Power supply ON/OFF signal output
GB