Air conditioner--RefrigerantzThe pressure of high and low
pressure end is high.
zPipeline of low pressure end
frosts or dews heavily.
Expansion valve has
malfunction.zRefrigerant in low pressure Check the expansion valve.
pipeline is too much.
zOpen degree of expansion
valve is too big.Phenomenon Possible reason Diagnose MethodState: cooling degree is not enoughzThe pressure of low pressure
end is too high.
zThe pressure of high pres-
sure end is too low.
There is inner leakage in
compressor.Repair or change the
compressor.zCompressor is bad.
zExpansion valve leaks or
sliding part is damaged.Phenomenon Possible reason Diagnose MethodState: not cool(8) Expansion valve is bad(9) Not cool 219