Error code
HP alarm hot water High-pressure hot-water alarm
Applies to 3 models
RXC35, RXC50, RXC65
What this means
The high-pressure switch has tripped during hot-water operation. Possible causes include an incorrectly adjusted TE24 sensor or an interruption in the high-pressure alarm circuit.
When to call a technician
This fault involves refrigerant, pressure, or electrical work that must be handled by a certified technician under EU F-gas rules. Do not attempt to open the refrigerant circuit, access mains wiring, or adjust pressure components yourself. Contact a qualified installer or servicer for this one.
See the official ComfortZone manualA deep link to the manufacturer's own PDF for full technical detail. We link to manuals, we never host them.