3-82
YES
YES
YES
NO
NO
Check compressor.
Sensor error
Modify connector connection.
Pd sensor : CN501
Ps sensor : CN500
Are Pd sensor/Ps sensor
connectors correctly connected?
Is output voltage characteristics
of Ps sensor normal?
Is low-pressure below 0.95MPa
during operation of compressor?
Check interface P.C. board.
YES
NO
NO
Does refrigerant bypass from
outlet to inlet on 4-way valve?
Check 4-way valve.
Check code
Operation cause
[AF]
Phase order alarm
Abnormal power phase order or mossing a phase of power
supply of outdoor unit
There is an abnormal power phase order or mossing a phase of power supply of the outdoor unit.
Modify power supply wiring
Check code
Operation cause
[b4]
Ps sensor alarm
1. Ps sensor error
2. Ps sensor connection error
3. Compressor compressing error
4. 4-way valve error
Содержание MMC-P0151H
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