Joule Victorum fault 81
No temp diff across evaporator
Heat pumpWhat it means
No temperature differential detected across the evaporator. This is a temporary blocking fault - the Heat Pump automatically restarts after 1 hour.
Likely causes
- Fan not operating correctly
- Possible blockage in the duct system
- Kitchen ceiling valve installed too close to kitchen extractor fan
Where to start
- Check fan operation
- Check for possible blockage in the duct system
- Navigate to Settings icon (second Settings tile) > Adjust air valves? setting
The full answer, free
- 7 more checks in order
- The readings and component tests from the manual
- How to put it right, step by step
- The manual page for this fault (page 96), right under the answer
Safety: Isolate the outdoor unit and any backup heater, and give the inverter capacitors time to discharge before you open the electrics. Anything on the refrigerant circuit needs F-gas certification.
From the Joule manual for the Victorum. Check the model on the data plate before you order parts.