AC — No signal detection between TA 211 E or RAM and circuit board

What does AC mean?

There is a lack of communication or signal detection between the external control unit (TA 211 E or RAM) and the boiler's main circuit board. This can prevent proper operation or control.

• An issue with the TA 211 E or RAM unit itself.
• A problem with the connection wiring between the external unit and the boiler's circuit board.
• A malfunction of the boiler's main circuit board.

Click steps to track your progress.

1. 1

   Check the wiring connecting the TA 211 E or RAM unit to the boiler's main circuit board for any damage or loose connections.

2. 2

   Ensure all connections are secure and properly seated at both ends.

3. 3

   If wiring is intact, the TA 211 E, RAM unit, or the boiler's circuit board may need professional inspection or replacement.