Troubleshooting
WSHP-SVX11E-EN 33
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
weigh
t (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
Low suction pressure
X X Undercharged Locate leak, repair and recharge
X X Restricted thermal expansion valve Repair / replace
X Inadequate air flow Check, clean blower and coil
X Dirty filter Clean/replace
X Inadequate GPM Increase GPM
Low pressure switch open
X Inadequate GPM Increase GPM
X Water too cold Increase temperature
X Inadequate air flow
Increase CFM
X Dirty filter Clean/replace
X X Undercharged with refrigerant Increase charge
X X Defective pressure switch Replace
X X Heat transfer fluid too cold Raise water temperature
Table 11. Troubleshooting table (continued)
Problem Heating Cooling Cause Correction
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