Hyundai Tiburon 2003 Workshop Manual page 530

Symptom seen in
refrigeration system
• Vacuum indicated on low
pressure side, very low
pressure indicated on
high pressure side
• Frost or dew seen on
piping before and after
receiver/drier or
expansion valve
6. Refrigerant overcharged or insufficient cooling of condenser
Symptom seen in
refrigeration system
Press too high on both low
and high pressure sides
7. Air present in refrigeration system
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Probable cause
Refrigerant does not
• Refrigerant flow
circulate
obstructed by moisture or
dirt in refrigeration
system
• Refrigerant flow
obstructed by gas
leakage from expansion
valve
Probable cause
• Unable to develop
sufficient performance
due to excessive
• Insufficient cooling of
condenser
Diagnosis
Diagnosis
• Excessive refrigerant in
cycle → refrigerant
overcharged
• Condenser cooling →
condenser fins clogged
or condenser fan faulty
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Remedy
- Check expansion valve
- Clean out dirt in
expansion valve by
blowing with air
- Replace drier
- Evacuate air and charge
new refrigerant to proper
amount
- For gas leakage from
expansion valve, replace
expansion valve
Remedy
- (1) Clean condenser
- (2) Check cooling fan
with fluid coupling
operation.
- (3) If (1) and (2) are in
normal state, check
amount of refrigerant
Charge proper amount of
refrigerant
24.04.2008