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Whirlpool WHP44 Installation Instructions Manual page 15

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Problem
Low suction pressure
Low head pressure
High suction pressure
High head pressure
Units with reciprocating compressors and non-bleed TXV's require a Hard Start Kit.
Cause/Test Method and/or Solution
Dirty outdoor coil. Inspect coil. Clean, if needed.
Wrong type of expansion valve. Replace valve.
Expansion valve restricted. Replace valve.
Undersized expansion valve. Replace valve.
Inoperative expansion valve. Check valve operation. Replace if needed.
Faulty defrost control. Test control. Replace if needed.
Faulty defrost thermostat. Test defrost thermostat. Replace if needed.
Shortage of refrigerant. Test for leaks. Add refrigerant.
Restricted liquid line. Replace restricted part.
Too much air across indoor coil. Reduce blower speed.
Broken valves. Test compressor efficiency. Replace if needed.
Inefficient compressor. Test compressor efficiency.
Wrong type of expansion valve. Replace valve.
Expansion valve restricted. Replace valve.
Faulty reversing valve. Replace valve or solenoid.
Faulty defrost control. Test control. Replace if needed.
Faulty defrost thermostat. Test defrost thermostat. Replace if needed.
Flowrator not seating properly. Check flowrator and seat or replace, if needed.
Too much air across indoor coil. Reduce blower speed.
Overcharge of refrigerant. Recover part of charge.
Broken valves. Test compressor efficiency. Replace if needed.
Inefficient compressor. Test compressor efficiency.
Expansion valve bulb loose. Tighten bulb bracket.
Faulty reversing valve. Replace valve or solenoid.
Faulty defrost thermostat. Test defrost thermostat. Replace if needed.
Flowrator not seating properly. Check flowrator and seat or replace, if needed.
Faulty evaporator fan motor. Repair or replace.
Shorted or grounded fan motor. Test motor windings.
Restricted liquid line. Replace restricted part.
Dirty air filter. Inspect filter. Clean or replace, if needed.
Dirty indoor coil. Inspect coil. Clean, if needed.
Not enough air across indoor coil. Speed blower. Check duct static pressure.
Overcharge of refrigerant. Recover part of charge.
Dirty outdoor coil. Inspect coil. 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. Replace valve.
Oversized expansion valve. Replace valve.
Faulty reversing valve. Replace valve or solenoid.
Faulty defrost control. Test control. Replace if needed.
Faulty defrost thermostat. Test defrost thermostat. Replace if needed.
NOTICE
Goodman 23 Long
15

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