Joule Modul Air fault 80
No temperature difference across the condenser
Heat pumpWhat it means
No temperature difference detected across the condenser. Causes temporary blocking of the heat pump; it automatically restarts after 1 hour.
Likely causes
- Circulating pump fault
- Air trapped in the system
Where to start
- Check the circulating pump operation
- Check for air in the system
- Navigate to Modul-AIR Status > Status to view airflow, input voltage and heat request
The full answer, free
- 21 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 104), 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 Modul Air. Check the model on the data plate before you order parts.
Other Joule Modul Air fault codes
- 12No communication with the room thermostat
- 13No communication with the boiler
- 20Filter reached end of lifespan
- 30Top tank temperature sensor error
- 31Bottom tank temperature sensor error
- 32Back up heater water heater temperature sensor error
- 71Over-temperature flow protection triggered
- 95Water pressure is critically low (< 0.3 bar)