Mitsubishi Heavy Industries FDT200VSAWPVH Service Manual page 52

c) Motor control PCB (FDU200VH, 250VH, 280VH)
① Replace the PCB
i) Take off the connection of connector and remove the screw of power transistor then remove the PCB.
Wipe off the silicon grease neatly on the control's radiation heat fins.
ii) Before installing the power transistor on the new PCB, apply uniformly a bundled of silicon grease first on the
surface of power transistor. Make sure it is applied to prevent damage on power transistor, and install the PCB not
to pinch the wirings.
iii) Tighten the screw of power transistor and reconnect the wirings to the PCB.
Confirm the connection and don't use soldering in the connection. Tighten properly the power transistor with a
screw and make sure there is no slack. Power transistor can be damage if not properly tighten. (Recommended
power transistor tightening torque:0.59 -0.78N･m)
② Fan motor control PCB
Parts mounting are different by the kind of PCB.
51
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'21 • PAC-SM-383
PSC012D036
Part number
CNFM(White）
Fan motor
CNM（White）
Motor power