Mitsubishi Heavy Industries SCM71ZM-S1 Technical Manual page 235

2) Power PCB
This PCB is a general PCB. Replace the PCB according to this instruction.
a) Replace the PCB
i) Unscrew terminal of the wiring(yellow/green) connected to Terminal block (CNWO) from the box.
ii) Replace the PCB only after all the wirings connected to the connector are removed.
iii) Fix the board such that it will not pinch any of the wires.
iv) Reconnect the wirings to the PCB. Wiring connector color should match with the color of connector of the PCB.
v) Screw back the terminal of wiring, that was removed in i).
b) Power PCB
Parts mounting are different by the kind of
CNW3（White）
Terminal block
CNW1(White）
Control PCB
PCB
.
Part number
234
-
CNM1(White）
Fan motor
-
'17 • SCM-T-225
PSB012D992
C
CNW0（White）
Terminal block