McQuay MLCV Dokumentacja Pobierz pdf (Strona 140)

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The most common causes of air conditioner failure to “start” are :

a) Voltage not within ±10% of rated voltage.

b) Power supply interrupted.

c) Improper control settings.

d) Air conditioner is disconnected from main power source.

e) Fuse blown or circuit breaker off.

BY MEANS OF DIAGNOSTIC FLOW CHART :

Generally, there are two kinds of problems, i.e. starting failure and insufficient cooling/heating. “Starting failure”

is caused by electrical defect while improper application or defects in refrigerant circuit causes “Insufficient

cooling / heating”.

i) Diagnosis of Electric Circuit

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McQuay MLCV Dokumentacja Strona 140