Lennox LI012CI-170P432-1 Service Manual page 75

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