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WSHP-SVX014J-EN
Table 48. Troubleshooting table (continued)
Problem
Heat-
ing
Cool-
ing
Cause Correction
Blower runs, but compressor does
not
X X
Defective compressor overload Replace (if external)
X X
Defective compressor contactor Replace
X X
Supply Voltage too low
Correct
X X
Defective compressor capacitor Replace
X X
Defective windings Replace
X X
Limit switches open Check cause/Replace or repair
Insufficient capacity
X X
Dirty filter Replace/clean
X X Blower RPM too low Correct
X X Loss of conditioned air due to leaks in ductwork
Repair leaks
X
Introduction of excessively hot return-air
Correct
X
Introduction of excessively cold return-air
Correct
X X
Low on refrigerant charge
Locate leak, repair and recharge by weight (not
by superheat)
X X
Restricted thermal expansion valve Replace
X X
Defective reversing valve
See WSHP-IOM-# for touch test chart
X X
Thermostat improperly located
Relocate
X X Unit undersized
Recalculate heat gains/losses
X X
Inadequate water flow
Increase GPM
X X
Scaling in heat exchanger Clean or replace
X Water too hot
Decrease temperature
X Water too cold
Increase temperature
X X Filter drier blocked
Replace
X X
Defective reversing valve Check or replace
High pressure switch open
X
Inadequate GPM
Increase water flow to unit
X Water too hot
Decrease temperature
X
Inadequate air flow
Check, clean blower and coil
X
Dirty filter Clean/replace
X X
Overcharged with refrigerant Decrease charge
X X
Defective pressure switch Check or replace
High head pressure
X
Trash in heat exchanger
Backflush
X Low water flow Increase GPM
X X
Overcharge of refrigerant Decrease charge
X X
Non-condensable in system Evacuate and recharge by weight
X X Water too hot
Decrease temperature
X
Dirty filter Clean / replace
X
Inadequate air flow
Check, clean blower and coil
Troubleshooting
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