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Manual 2100-518B
Page 27 of 30
Problem Possible Causes Checks & Corrections
Water Drips Out
Condensation Insulate piping, check for insulation gaps.
Water Leak Inspect/tighten ttings.
Low Flow / No Flow
Power Loss Check power supply from the heat pump.
Blown Circuit Breaker Reset circuit breaker for ow center in heat pump control box.
Broken or Loose Wires Replace or tighten wires.
Pump Shaft Stuck Remove the indication plug and ensure that shaft is rotating.
Air Lock Flush loop to eliminate air.
Improperly Sized Pump Add pump capacity.
Defective Pump Replace.
No Positive Pressure Check for leaks, add uid, ush as required and pressurize.
Viscous Solution Change type of antifreeze.
Loop Freezing or Frozen
Switch thermostat to A/C operation to see if ow improves at warmer temperature.
Add antifreeze and measure freeze protection.
Kink in Loop Straighten or Replace.
Noisey
Defective Pump Replace.
Air in Loop Flush loop again.
Vibration Check mounting.
Pressure Loss
Leak Repair.
Temperature Change Not a problem; pressure should vary as temperature changes.
Pipe Expansion Not a problem; plastic piping relaxing.
Unit Trips Out on Water Flow
(Low Pressure or High Pressure)
Low Flow / No Flow See Low Flow / No Flow.
TROUBLESHOOTING