F.49 - eBUS fault

What does F.49 mean?

The eBUS system has detected a fault, possibly due to a short circuit, an overload, or incorrect power supply polarity.

• Short circuit on eBUS
• eBUS overload
• Two power supplies with different polarities on the eBUS

Click steps to track your progress.

1. 1

   Press the reset button on the boiler display up to three times to try and clear the fault.

2. 2

   Visually inspect all eBUS connections to ensure they are properly seated and show no signs of short circuits.

3. 3

   Verify that only one power supply is connected to the eBUS circuit, or that any multiple supplies have matching polarities.

4. 4

   If the fault persists, contact customer service or a qualified technician for further diagnosis of the eBUS system.