Troubleshooting
28
WSHP-SVX02E-EN
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
Low suction pressure
X
X
Undercharged
Locate leak, repair and recharge
X
X
Restricted thermal expansion valve
Repair / replace
X
Inadequate GPM
Increase GPM
Low Pressure switch open
X
Inadequate GPM
Increase GPM
X
Water too cold
Increase temperature
X
X
Undercharged with refrigerant
Increase charge
X
X
Defective pressure switch
Replace
X
X
Heat transfer fluid too cold
Raise water temperature
Freezestat open
X
Inadequate GPM
Increase GPM
X
Water too cold
Increase GPM
X
X
Defective freezestat
Replace freezestat
X
Heat transfer fluid too cold
Replace freezestat
Table 15. Troubleshooting checklist (continued)
Problem
Heating Cooling Cause
Correction