Midea MS11D-12HRDN1 Сервис мануал онлайн [56/56] 624903

Neola Inverter DM13-01.01.12 en

56 Service manual

11.2.8 Inverter compressor drive error diagnosis and solution

11.2.9 Zero crossing detection error

This is alarm signal when the main chip can’t detect over-zero signal. When such failure occurs, the

main control board must have fault.

11.2.10 Refrigerant Leakage Detection

Shut off the power supply and turn on it 5s later

The problem comes out again

Yes

Replace the T2 sensor

and check if the errors

happen again?

Is there any leakage? Especially the connection

parts, such as the gas valve and the liquid valve.

Is there cool air blowing out from the indoor air outlet?

Is there any block? (Such as the capillary or the

welded points of the pipes.)

Yes

Replace the indoor PCB

Yes

Replace the outdoor PCB

Replace inverter compressor.

Reconnect and retry

Is the connection of compressor good?

Is the wiring sequence right? The

voltage range proper?