06 Compressor Current Too High MP4000

Occurs during pretrip (PTI) or function test only.
During compressor test, if Compressor power consumption is 25% above expected current draw or compressor phase current level differs 33% or more.
If both alarm #6 and #7 is active this indicates too high phase difference.
Expected compressor current is a function of the surrounding conditions.
Indicates:
Defective Digital Control valve.
Defective compressor.
Defective volt or amp meter on power module.
Inaccurate ambient, condenser or evaporator temperature measurement.
Excessive condenser pressure due to air or wrong refrigerant in system, or refrigerant over charge

Check evaporator and condenser sensor temperatures for correct value (± 5 C [± 9 F]) by viewing Data menu.
To determine the current draw measurement, enter Manual Function Test menu. Start and check current draw of the following components separately and together: compressor, compressor full loaded, condenser fan and evaporator fan (high or low).
Check power supply volts on all 3 phases.

Dhilreefer