Mitsubishi Heavy Industries FDUA160AVSAVH Service Manual page 47

Duct connected-high static pressure type

Table of Contents

c) Motor control PCB

i ) Replace the PCB

① 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.

② 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.

③ 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)

ii) Fan motor control PCB

Parts mounting are different by the kind of PCB.

• Model FDUA160VH

• Model FDUA200VH

Part number

'21 • PAC-SM-398

PSC012D022

PSC012D036

CNFM(White）

Fan motor

CNM（White）

Motor power

Table of Contents

Fdua200avsavh