No display message, but system not operating correctly — Basic checks needed

What does No display message but operational interference mean?

If the system is not functioning as expected but no specific error code or message appears on the display, several basic checks should be performed.

• Main power supply issues
• Tripped circuit breakers or fuses
• Incorrect switch positions

Click steps to track your progress.

1. 1

   Check the position of the main switch (SF1).

2. 2

   Verify the status of the group and main fuses for the property.

3. 3

   Inspect the miniature circuit breaker for the SMO 20 (FC1).

4. 4

   Check the property's earth circuit breaker.

5. 5

   Test the installation's residual current device (RCD).