Mitsubishi MSC-GA20VB Service Manual download pdf (Page 27)

Check of indoor electronic control P.C. board

Check the both “parts side” and “pattern

side” of indoor electronic control P.C.

board visually.

Replace the fuse.

Is fuse (F11) blown?

Replace the fan

motor.

Replace the indoor

electronic control

P.C. board.

Is winding

resistance of

fan motor 0 Ω?

Is winding

resistance of

vane motor 0 Ω?

Yes

Replace the vane

motor.

Yes

Is varistor (NR11) burnt?

Replace the varistor.

Yes

Turn OFF the power supply.

Remove indoor fan motor connector CN211 and

vane motor connector CN151 from the indoor electronic

control P.C. board and turn ON the power supply.

Does the unit operate with the remote controller?

Does the OPERATION INDICATOR lamp light up

by pressing the EMERGENCY OPERATION switch?

Yes

Turn OFF the

power supply.

Turn OFF the

power supply.

Varistor (NR11)

Indoor electronic

control P.C. board

The unit does not operate with the remote controller. Also, the OPERATION INDICATOR lamp does not light up by

pressing the EMERGENCY OPERATION switch.

OBH529A

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 35 36

No comments

Mitsubishi MSC-GA20VB Service Manual Page 27