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General| Model | SUM3TA |
|---|---|
| Type | Heat Pump |
| Refrigerant | R410A |
| Compressor | Scroll |
| Voltage | 208/230V |
| Phase | Single |
General safety precautions for servicing heat pumps, including refrigerant handling and electrical hazards.
Indicates a low-pressure switch is open, typically due to low refrigerant pressure.
Guides for diagnosing and resolving the LP error code, focusing on refrigerant leaks and switch issues.
Indicates a high-pressure switch is open, usually due to restricted water flow.
Troubleshooting steps for HP/HI errors, focusing on water flow and TXV issues.
Indicates an open water temperature sensor. Check sensor wiring and resistance.
Troubleshooting steps for PO/OP errors, involving sensor checks and control board replacement.
Indicates a shorted water temperature sensor. Check sensor wiring and resistance.
Troubleshooting steps for Pc/SH errors, focusing on sensor issues and control board replacement.
Indicates an open defrost temperature sensor. Check sensor wiring and resistance.
Troubleshooting steps for dPO/cOP errors, involving sensor checks and control board replacement.
Indicates a shorted defrost temperature sensor. Check sensor wiring and resistance.
Troubleshooting steps for dPc/cSH errors, focusing on sensor issues and control board replacement.
Indicates an open water pressure switch, often related to low water flow.
Troubleshooting steps for Flo/PS errors, focusing on water flow, pressure switch adjustment, and wiring.
Indicates no low voltage to the control, often due to a tripped breaker or blown fuse.
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