Your Pool Heat Pump is equipped with a built-in self-diagnostic function. When the unit detects a potential operating issue, a specific error code—usually a combination of letters and numbers—will appear on the control panel or line controller.
This guide will help you identify the meaning of each error code and understand the possible cause of the issue. Find the code displayed on your unit in the table below, then refer to the corresponding page for troubleshooting information.
This guide covers common Pool Heat Pump error codes related to water flow, refrigerant pressure, temperature sensors, fan operation, and communication faults.
| Code | Reason |
|---|---|
| E03 | Water Flow Switch Fault |
| E05 | High Pressure Switch Fault |
| E06 | Low Pressure Switch Fault |
| E09 | Line Controller and Main Control Board Communication Failure |
| E11 | Limited Time Protection |
| E12 | Exhaust Air Temperature Too High |
| E15 | Water Inlet Temperature Sensor Failure |
| E16 | Coil Sensor Failure |
| E18 | Exhaust Air Sensor Fault |
| E21 | Environmental Sensor Failure |
| E22 | Return Water Sensor Failure |
| E27 | Out of Water Sensor Failure |
| E29 | Suction Sensor Fault |
| E38 | DC Fan Failure |
| E96 | Abnormal Communication Between Compressor Driver and Main Control Board |
| E98 | Abnormal Communication Between Fan Motor and Main Control Board |
For detailed, step-by-step troubleshooting instructions for all the error codes listed above, please view the complete troubleshooting guide.
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