Heat Controller RAD-243A Troubleshooting Guide, Unit runs but poor cooling, Ineffective Cooling

Troubleshooting Guide

Troubleshooting Guide

In general, possible trouble is classified in two kinds.

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

Unit runs but poor cooling.

Ineffective Cooling

Check cold air circulation for smooth flow.

Dirty indoor coil (Heat exchanger)

Malfunction of fan

Clogged of air filter.

Obstruction at air outlet

Stop of auto air-swing

Correct above trouble

Check clogging in refrigera- tion circuit.

Repair clogging in refrigera- tion circuit.

Check outdoor coil

(heat exchanger) & the 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.

Unexpected residue

Overloaded circuit

Check inside gas pressure.

Adjusting of refrigerant charged.

Malfunction of compressor.

Replacement of compressor.

Service Manual 26