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Joule Modul Air fault 13

No communication with the boiler

Heat pump

What it means

The heat pump has lost communication with the boiler. This is a locking fault requiring installer intervention to override.

Likely causes

  1. Faulty electrical connection
  2. Boiler malfunction

Where to start

  1. Check electrical connections
  2. Check the boiler is operating correctly
  3. Tap the Settings icon in the main menu

The full answer, free

  • 5 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 105), right under the answer
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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