Sensor fault at startup/restart — Incorrectly shown despite sensor being present

What does Sensor fault at startup/restart mean?

The system would sometimes incorrectly display a sensor fault during startup or restart, even though the sensor was physically connected and functioning correctly. This is a false alarm that usually resolves itself or indicates a temporary glitch.

• Software bug causing transient or false sensor fault readings during power-up.
• Temporary instability in sensor communication during system initialization.
• Loose sensor connection that temporarily fails at startup.

Click steps to track your progress.

1. 1

   Power cycle the entire system by turning off and on the main power breaker.

2. 2

   Check the connections of all sensors to ensure they are secure and free from damage.

3. 3

   Update the NIBE SMO 20 firmware to version 7607R3 or later.

4. 4

   If the false sensor fault persists, note which specific sensor is indicated and contact support.