Compression System Diagnosis - Suzuki sq-416-420-625 Service Manual

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
Noise from compressor
Noise from magnetic clutch
Insufficient cooling
Not rotating
Oil and/or gas leakage
POSSIBLE CAUSES
D Defective bearing
D Defective cylinder and/or shaft
D Defective bearing
D Defective clutch face
D Defective gasket
D Defective reed valve
D Locked compressor
D Seized magnetic clutch
D Rotating parts seized by insufficient oil
amount
D Defective seal
D Defective O-ring
AIR CONDITIONING (OPTIONAL) 1B-11
CORRECTION
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.