Troubleshooting Chart - Whirlpool Gold WPH43M Installation Instructions Manual

Disconnect ALL power before servicing.
Multiple power sources may be present.
Failure to do so may cause property damage, personal injury or death.
Symptom Possible Cause
High head— Restriction in liquid line or flowrator
low suction
High head— Dirty condenser coil
high or normal
Overcharged
suction
Condenser fan not running
Low head— Incorrect flowrator
high suction
Defective compressor valves
Flowrator not seating properly
Unit will not Power off or loose electrical connection
run.
Thermostat out of calibration; set too
high
Defective contactor
Blown fuses or tripped circuit breaker
Transformer defective
High or low pressure control (optional)
open
Compressor overload contacts open
Condenser fan Loose connection
runs;
Compressor stuck
compressor
Grounded or open winding
does not run.
Open internal overload
Low voltage connection
Capacitor weak, open or shorted
Low suction— Low indoor airflow
cool
compressor,
iced
evaporator coil
Compressor Defective overload protector
short cycles
Unit cycling on low pressure control
Registers Low airflow
sweat
High suction Excessive load
pressure
Defective compressor
Reversing valve not seating properly.
Insufficient Improperly sized unit
cooling
Improper airflow
Incorrect refrigerant charge.
Incorrect voltage
Evaporator Low airflow
coil freezing or
Low refrigerant charge
frosting
Operating unit in cooling mode below
65ºF (18ºC) outdoor temperature

TROUBLESHOOTING CHART

WARNING
HIGH VOLTAGE!
Remedy
Remove or replace with proper size flowrator.
Clean coil.
Correct system charge.
Repair or replace condenser fan.
Replace with correct flowrator.
Replace compressor.
Check for debris under flowrator or deformed flowrator. Remove debris
or replace flowrator.
Check for unit voltage at contactor in unit.
Reset thermostat.
Check for 24 volts at contactor coil. Replace if contacts are open.
Replace fuse or reset circuit breaker. Check wiring. Replace
transformer.
Reset high pressure control or check unit charge.
High pressure control opens at 610 psig, and low pressure control
opens at 22 psig.
Replace compressor.
NOTE: Wait at least 2 hours for overload to reset.
Check for unit voltage at compressor.
Check and tighten all connections.
Wait at least 2 hours for overload to reset. If still open, replace the
compressor.
At compressor terminals, voltage must be within 10% of nameplate
volts when unit is operating.
Check capacitor. Replace if defective.
Increase speed of blower or reduce restriction.
Replace air filters.
Replace overload protector. Check for correct voltage.
Check refrigerant charge and/or airflow.
Increase speed of blower or reduce restriction.
Replace air filters.
Recheck load calculation
Replace compressor.
Replace reversing valve.
Recalculate load.
Check airflow—should be approximately 400 CFM per ton.
Charge per procedure attached to unit service panel.
At compressor terminals, voltage must be within 10% of nameplate
volts when unit is operating.
Check airflow—should be approximately 400 CFM per ton.
Properly charge unit.
Install or check low ambient control—should be open below 65ºF
(18ºC) outdoor temperature.
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