34
Installation and Maintenance
Service Manual
No. Malfunction
Name
Display Method
of Indoor Unit
(Error Code)
A/C Status
Possible Causes(For specic maintenance method, please
refer to the following procedure of troubleshooting)
8
Overload
protection for
compressor
H3 The entire unit stops.
1. Outdoor and indoor heat exchangers are too dirty or the air
inlet/outlet is blocked.
2. Fan motor is not working Abnormal fan speed; fan speed is
too low or the fan doesn't run.
3. Compressor doesn't work normally.Strange noise or leakage
occurs.Temperature of the shell is too high.
4. System is blocked inside(dirt block, ice block, oil block, Y-valve
not fully open).
5. High pressure switch is abnormal.
6. The refrigerant is leaking and cause overheating protection to
compressor.
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