Flashing --/ - Communication fault between UBA 3 and BC10 controller

What does --/ mean?

The boiler's internal communication system (UBA 3 and BC10 basic controller) is experiencing a fault. The display flashes this code continuously if a problem is detected during or after the initial startup test. No heating or domestic hot water (DHW) will be available.

• Fault in communication between UBA 3 and BC10 basic controller

Click steps to track your progress.

1. 1

   Observe the display during startup. If the code flashes for more than 10 seconds, a fault is present.

2. 2

   Power cycle the boiler by switching it OFF and then ON using the main power switch.

3. 3

   If the code persists, contact a qualified service technician for further diagnosis.