Bubbles or foam visible Trouble shoot
● No bubble shown
High-pressure pipe is hot
abnormally.
H-L pressure of the
pressure gauge needle
indicates high pressure
abnormally
●Too much of refrigerant deflate.
●High pressure pipe is not abnormal
● H.L pressure of the pressure
gauge needle indicates high
abnormally.
Abnormal
● Refrigerant in the
sight is shown clearly
● When engine rpm
operates with high low
some bubbles disappear
slowly
● Normal refrigerant gas situation
● High pressure pipe is hot
Low pressure pipe is cool
● High low pressure is normal
with below.
Low: 1.5~2.0kg/㎡
High: 14.5~15kg/㎡
Abnormal
5.Diagnosing malfunctions.
(1) Tracing faults
1.Compressor
Abnormal
sound
Inlet sound
Outlet sound
Insufficient Lub. Replenish
Belt tension release Adjust
Release the bracket
Tighten the
bolts
Clutch fail Check
Abnormal
revolution
Inlet cause
Damaged parts Check,replace
Slip the clutch Check,replace
Not Lub. Replenish
Outlet cause Belt tension released Adjust
Refrigerant or
oil leakage
Refrigerant or
oil leakage
Sealing washer
damaged
replace
Head bolt released
Tighten the
bolts
D-ring damaged Replace
Excessive
pressure
Low,High
pressure
Insufficient refrigerator Adjust
Compressor Replace
99
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