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Warning: Too low discharge temperature and too low temperature of lubricating oil in
the oil when starting up will cause a large amount of refrigerant to dissolve in
lubricating oil, which will not only damage the compressor bearings, but also easily
9. Failure analysis and maintenance
9.1 General fault description
fault condition
Motor coil temperature
switch action (protection
module alarm 1)
cause the compressor to lose oil.
1. The high load causes the suction superheat to be too high
2. High voltage is too high, the load is too large
3. Poor motor cooling
4. Frequent startup
5. Coil PTC failure
6. Power phase sequence error or phase loss
7. The motor coil is bad and the temperature is too high
reason
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