Mitsubishi Electric PUHY-HP144TSHMU-A Service Handbook page 58

[ III Outdoor Unit Components ]
2. M-NET board
CN03 CN04
Bus voltage input Bus voltage output
P P
N N
Grounding
HWE0716A
CNS2
Transmission line input/output for
centralized control system
CN102
Power supply output for centralized control system
Indoor/outdoor transmission line input/output
Grounding
Grounding
TB3
Indoor/outdoor
transmission block
- 49 -
CNIT
Input 12VDC
GND
Input 5VDC
Power supply detection output
Power supply ON/OFF signal input
TB7
Ground terminal for
Terminal block for
transmission line
transmission line for
centralized control
LED1
Power supply for indoor
transmission line
TP1,2
Check pins for
indoor/outdoor
transmission line
GB