GP Series Portable Chillers Chapter 6: Troubleshooting 39 of 64 Problem Possible cause Solution
Pump running in reverse.
Verify rotation; if running in reverse
rotation, reverse any two main power
leads. Re-verify for correct pump
rotation.
Pump process pressure low (refer
to curves for normal pressure for
various pumps). Check for foreign matter. Clean the system strainer.
Pump process pressure is too high. Restricted water flow. Check for partially closed valves etc.
Make sure that all lines are properly
sized.
Clean filters.
Restricted condenser air flow. Clean condenser.
Unit low on refrigerant. Check the refrigerant charge by viewing
sight glass on liquid line upstream of the
expansion valve.
Compressor not operating
efficiently. Call service.
Unit runs continuously, but not
enough cooling power.
Unit under-sized for application. Call sales rep.