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Detailed troubleshooting guide for specific error codes, starting with 7H-01.
Troubleshooting steps for water flow problems, including checks for valves, purging, and sensors.
Troubleshooting for inlet water thermistor input out of range, checking thermistor and hydro PCB.
Troubleshooting steps for heat exchanger freezing issues, checking multiple thermistors and refrigerant circuit.
Troubleshooting for high pressure in heating/DHW or low pressure in cooling.
Troubleshooting steps when the backup heater thermal protector is activated due to high temperature.
Troubleshooting for outdoor unit fan motor malfunction, checking fan motor and main PCB.
Troubleshooting for main PCB detecting current/voltage errors.
Troubleshooting for incorrect energy metering values displayed on the user interface.
Troubleshooting for increased water pump sound level and incorrect water pump operation.
Troubleshooting steps for compressor issues, including not starting and frequency limitations.
Troubleshooting for ice build-up on the outdoor unit, defrost malfunctions, and partial coil icing.
Checking procedures and repair steps for the 3-way valve, including mechanical and electrical checks.
Procedures for checking and repairing the 4-way valve, including electrical checks and position checks.
Procedures for checking refrigerant circuit charge, blockages, and non-condensables.
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General