Error code
HP larm varmvatten High-pressure domestic-hot-water alarm
Applies to 6 models
RX35, RX50, RX65, RXL35, RXL50, RXL65
What this means
The high-pressure switch has tripped during hot-water production, possibly because the TE24 hot-water sensor is incorrectly adjusted or the alarm circuit is faulty.
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.