WSHP-SVX022A-EN
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Table 14. Troubleshooting table (continued)
Problem
Heating Cooling 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
Problem
Heating Cooling Cause Correction
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
Troubleshooting
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