Specifications

11
■ Evaporator fan will not start. ■ Blown fuse. Inspect fuse size and type. Replace, if needed.
■ Loose connection. Inspect connection. Tighten if needed.
■ Shorted or broken wires. Test circuits with ohmmeter. Replace if needed.
■ Open fan overload. Test continuity of overloads.
■ Faulty thermostat. Test continuity of thermostat and wiring. Replace, if needed.
■ Shorted or open capacitor. Test capacitor.
■ Faulty fan relay. Test continuity of coil and contacts.
■ Open control circuit. Test control circuit with voltmeter.
■ Faulty evaporator fan motor. Repair or replace.
■ Condenser fan will not start. ■ Shorted or broken wires. Test circuits with ohmmeter. Replace if needed.
■ Open fan overload. Test continuity of overloads.
■ Shorted or open capacitor. Test capacitor.
■ Faulty compressor contactor. Test continuity of coil and contacts. Replace, if needed.
■ Shorted or grounded fan motor. Test motor windings.
■ Faulty defrost control. Test control.
■ Compressor runs—goes off on
overload.
■ Loose connection. Inspect connection. Tighten if needed.
■ Shorted or broken wires. Test circuits with ohmmeter. Replace if needed.
■ Shorted or open capacitor. Test capacitor.
■ Shorted or grounded compressor. Test motor windings.
■ Compressor stuck. Use test cord.
■ Faulty compressor contactor. Test continuity of coil and contacts. Replace, if needed.
■ Low voltage. Test voltage.
■ Overcharge of refrigerant. Recover part of charge.
■ Dirty outdoor coil. Inspect coil and clean, if needed.
■ Improperly located thermostat. Relocate thermostat.
■ Wrong type of expansion valve. Replace valve.
■ Expansion valve restricted. Remove restriction or replace valve.
■ Undersized expansion valve. Replace valve.
■ Inoperative expansion valve. Check valve operation. Replace if needed.
■ Faulty reversing valve. Replace valve or solenoid.
■ Compressor cycles on overload. ■ Shorted or open capacitor. Test capacitor.
■ Compressor stuck. Use test cord.
■ Low voltage. Test voltage.
■ Improper cooling anticipator. Check resistance of anticipator.
■ Shortage of refrigerant. Test for leaks. Add refrigerant.
■ Restricted liquid line. Replace restricted part.
■ Overcharge of refrigerant. Recover part of charge.
■ Dirty outdoor coil. Inspect coil and clean, if needed.
■ Noncondensibles. Recover charge. Evacuate and recharge.
■ Recirculation of condensing air. Remove obstruction to airflow.
■ Wrong type of expansion valve. Replace valve.
■ Expansion valve restricted. Remove restriction or replace valve.
■ Undersized expansion valve. Replace valve.
Problem
No Cooling/Heating Cause/Test Method and/or Solution