Symptom seen in
refrigeration system
Probable cause
Diagnosis
Remedy
• Pressure low on both low
and high pressure sides
• Insufficient cooling
performance
Gas leakage at some place
in refrigeration system
• Insufficient refrigerant in
system
• Refrigerant leaking
- Check for gas leakage
with gas leak detector
and repair if necessary
- Charge proper amount of
refrigerant
- If indicated pressure
value is near 0 when
connected to gauge,
create the vacuum after
inspecting and repairing
the location of the leak
4. Poor circulation of refrigerant
Symptom seen in
refrigeration system
Probable cause
Diagnosis
Remedy
• Pressure low in both low
and high pressure sides
• Frost on tube from
receiver to unit
Refrigerant flow obstructed
by dirt in drier
Condenser clogged
Replace drier
5. Refrigerant does not circulate
Page 2 of 7
24.04.2008
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