"EXT. program 2" on screen - External program detected

What does EXT. program 2 mean?

The display shows "EXT. program 2," typically appearing during startup, indicating an external program or a communication issue with the boiler's control system.

• Incorrect coding addresses
• Issues with the VR20 circuit board
• Issues with the LGM (burner control unit)
• Problem with the programming unit control console

Click steps to track your progress.

1. 1

   Verify all coding addresses are set correctly according to your system configuration.

2. 2

   If the problem persists, replacement of the VR20 circuit board may be necessary.

3. 3

   If the problem still persists, replacement of the LGM (burner control unit) may be necessary.

4. 4

   If the problem continues, replacement of the entire programming unit control console may be necessary.