Unit Troubleshooting | 53Greensource CDi Series SM Model
8733819578 (2019/02)Greensource CDi Series SM Model
Subject to change without prior notice
HRP Troubleshooting
Table 13 HRP Troubleshooting
Problem Possible Cause Checks and Corrections
NO FLOW
LOW FLOW
No Power Check power supply
On/Off Switch Position
Set switch to “ON” position
Compressor Contactor
Engage heat pump contactor
Broken or loose wires
Repair or tighten wires
Air Lock
Purge air from piping system
Stuck pump shaft/impeller
Remove pump cartridge and clean
Defective pump
Replace pump
Kinked or undersized water piping
Repair kink and check for proper line size
HIGH WATER
TEMPERATURE
Water temp limit closed
Stuck limit switch
Sensor not attached securely to line
LOW HEAT
OUTPUT
Scaled or fouled heat exchanger Clean heat exchanger
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