4.3 TROUBLESHOOTING GUIDE

In general, possible trouble is classified in two kinds.

The one is called Starting Failure which is caused from an electrical defect. The other is Ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application.

Unit runs but poor cooling is ineffective.

Ineffective Cooling

Check of cold air circulation for smooth flow.

Dirty indoor coil (Heat exchanger)

Malfunction of fan

Clogged of air filter

Obstruction at air outlet

Remove obstruction.

Check clogging in refrigeration circuit.

Repair clogging in refrigeration circuit.

Check of outdoor coil (heat exchanger) & fan operation.

Check gas leakage.

Repair gas leak.

Replacement of unit if the unit is beyond repair.

Satisfactory operation with temperature difference of inlet & outlet air ; 44~50° F(7~10° C)

Check heat load increase.

Clean condenser.

Not on separate circuit

Check inside gas pressure.

Adjusting of refrigerant charge

Malfunction of compressor

Replacement of compressor

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Friedrich ZQ10 A10B manual Troubleshooting Guide, Ineffective Cooling

ZQ10 A10B specifications

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