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Hrp Troubleshooting - Bosch Greensource SM024 Installation, Operation And Maintenance Manual

Greensource cdi series sm model water-to-air heat pumps
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Greensource CDi Series SM Model

HRP Troubleshooting

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

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