YH4
GRAND
VITARA
AIR CONDITIONING (OPTIONAL) 1B-11
COMPRESSION SYSTEM DIAGNOSIS
Compressor troubles are mainly following three types: gas leakage, noise and insufficient pressure.
Compressor gas leakages in most cases develop from the shaft seal. When detecting gas leakage, always use
a leak tester. If a small amount of oil seeps out from the shaft seal, there is no necessity of replacing the seal. The
shaft seal has been designed to allow a small amount of oil to leak out for lubricating purpose. Thus, the shaft seal
should be replaced only when a large amount of compressor oil is leaking out or when gas leakage is discovered
by using gas tester.
In regard to noise and insufficient pressure, repairs should be made only after diagnosing the trouble properly.
CONDITION
POSSIBLE CAUSES CORRECTION
Noise from compressor Defective bearing
Defective cylinder and/or shaft
Replace.
Replace.
Noise from magnetic clutch Defective bearing
Defective clutch face
Replace.
Replace.
Insufficient cooling Defective gasket Replace.
Defective reed valve Replace.
Not rotating Locked compressor
Seized magnetic clutch
Rotating parts seized by insufficient oil
amount
Replace.
Replace.
Replace.
Oil and/or gas leakage Defective seal
Defective O-ring
Replace.
Replace.
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