Error Code P01 on your Rheem Heat Pump (551270 in R134a) indicates an internal fault within the heat pump’s control or sensor system. This fault affects normal operation and may prevent the unit from heating water correctly.
Immediately switch off the power supply at the isolation switch and close any open hot water taps. Due to the internal nature of this error, professional inspection and repair are required to ensure safe and proper function. Contact Hilton Plumbing to resolve this issue promptly.
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