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