Mitsubishi Electric MS-C18TV-E1 WH Service Manual page 34

MS-C24TV
Turn ON the power supply.
Pess the EMERGENCY OPERATION switch.
3-minute time delay works.
Test run operation operates for 30 minutes.
Is there 230V AC between 2-N on the
outdoor terminal block ?
No
Make the connection
of wiring correct.
Yes
Compressor
doesn't operate.
Is there 230V AC between
3-N on the outdoor terminal
block?
Yes
Is there 230V AC between
1 on the compressor
contactor(52C) and N on the
outdoor terminal block?
Yes
Check the compressor.
(Refer to page 31.)
Outdoor fan motor
doesn't operate.
Is there 230V AC between
3-N on the outdoor terminal
block?
Yes
Check the outdoor fan motor.
(Refer to page 31.)
Is there 230V AC between
No
3-N on the indoor terminal
block?
Yes
Reconnect the continuity
of indoor and outdoor
unit connection.
No
Replace the compressor
contactor(52C).
Is there 230V AC between
No
3-N on the indoor terminal
block?
Yes
Reconnect the continuity
of indoor and outdoor
unit connection.
34
No
Replace the indoor
electronic control P.C.
board.
Replace the indoor
No
electronic control P.C.
board.