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9.2 Poor Cooling Troubleshooting.
Symptom Probable Cause Corrective Action
1
Refrigerant flow
failure
1. Refrigerant gas shortage.
2. Excessive overcharging of
refrigerant.
3. Gas leakage.
4. Clogging of strainer or
capillary tube.
5. 4-Way valve is defective.
6. Solenoid 4-Way valve is
defective.
7. Compressor is defective.
8. Service valves are not fully
open.
1. Charge refrigerant gas.
2. Recharge gas.
3. Repair leakage.
4. Replace strainer.
5. Replace 4-Way valve.
6. Replace solenoid.
7. Replace compressor.
8. Open the valves full.
2
Air circulation
failure.
Air filter is clogged. Clean air filter.
3
Installation failure. 1. Location of the indoor or the
outdoor units is not according
to the instructions.
2. Refrigerant tubes between the
units are not installed
according to the instructions.
1. Relocate units.
2. Relocate or replace tubes.
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