E0 — Fault with external LON participant

What does E0 mean?

This control mode fault indicates an issue with an external device connected via the LON (Local Operating Network) bus.

• Loose or damaged connections to LON participants
• Malfunctioning external LON device
• Communication error on the LON bus

Click steps to track your progress.

1. 1

   Check the physical connections and wiring of all external LON participants.

2. 2

   Inspect each LON participant for its own fault indicators or signs of malfunction.

3. 3

   If the problem persists, contact a qualified heating technician to diagnose the LON network and connected devices.