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Wrap of refrigerant pipe joint is not close
enough.
Re-wrap and make it tight.
Water leakage
Fan of indoor unit contacts other parts. Adjust fan location.
Foreign object in indoor unit
Take out the foreign object.
Compressor shakes too much.
Adjust support washer of compressor, and
tighten loosen screws.
Touch of pipeline of outdoor unit
Separate the touching pipeline.
Abnormal sound
and shake
Touch of inner plates
1. Tighten connect screw.
2. Stick absorbing clay between plates.
Louver of outdoor unit touched outer
case.
Adjust location of louver.
Abnormal sound inside compressor
Change compressor
Abnormal solenoid sound from 4-way
valve when heating
Circuit-short inside solenoid of the valve
and change the solenoid valve.
Drainage pipe blocked or broken Change drainage pipe
There are no heating malfunctions in the above for the cooling only unit.