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Installation and Maintenance
Service Manual
5. Overload and high discharge temperature malfunction
Main detection points:
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If the electronic expansion valve is connected well? Is the electronic expansion valve damaged?
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If the refrigerant is leaked?
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The compressor overload protection terminal is not connected well with the mainboard?
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If the overload protector is damaged?
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Heat exchange of unit is not good? (heat exchanger is dirty and unit radiating environment is bad)
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Too much load of the system causes high temperature of compressor after working for a long time?
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Malfunction of discharge temperature sensor?
Malfunction diagnosis process:
