Alarm "low outdoor air" — Incorrectly shown after F2040-6 power failure

What does low outdoor air mean?

After a power failure on the F2040-6 outdoor unit, the system might incorrectly display an alarm indicating 'low outdoor air' even if the actual outdoor temperature is normal. This is a false alarm.

• Software bug causing a false alarm after F2040-6 power recovery.
• Temporary sensor misreading during system power-up after an interruption.
• Incomplete communication restoration between units after power failure.

Click steps to track your progress.

1. 1

   Confirm the actual outdoor temperature to determine if the 'low outdoor air' alarm is accurate.

2. 2

   Ensure the F2040-6 outdoor unit has restored power correctly.

3. 3

   Cycle the power to the NIBE SMO 20 control module to reset the system.

4. 4

   Update the NIBE SMO 20 firmware to version 8700R2 or later.