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Emphasizes extreme caution due to high voltage and the need for qualified personnel.
Explains LP error as low pressure switch open and troubleshooting steps.
Details common causes like refrigerant loss and intermittent errors, with solutions.
Explains HP/HI error as high pressure switch open and troubleshooting for restricted flow.
Details causes like TXV failure, refrigerant overcharge, and bad HP switch.
Indicates an open water temperature sensor and troubleshooting steps.
Indicates a shorted water temperature sensor and troubleshooting steps.
Indicates an open defrost temperature sensor and troubleshooting steps.
Indicates a shorted defrost temperature sensor and troubleshooting steps.
Indicates open water pressure switch, often due to low water flow.
Steps to check filter, pump, and pressure switch continuity.
Indicates no low voltage to the control, often caused by a tripped breaker.
Checks for 240V, 24V, blown fuse, and wiring issues to resolve blank display.
Indicates the heat pump is in defrost mode, normal at low ambient temperatures.
Steps to check defrost sensor resistance when error occurs above normal temperatures.
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General