Alarm 322 - Persistent pressure switch or over-temperature alarm

What does 322 mean?

The system has detected 2 repeated LP/HP/FQ alarms within 2.5 hours, or a persistent pressure switch/over-temperature alarm. This indicates an ongoing issue with heating medium flow or temperature control.

• Poor heating medium flow.
• Lack of refrigerant (for FQ14: High temperature 120 °C compressor peak).

Click steps to track your progress.

1. 1

   Check the system's circulation pump to ensure it is operating correctly and not blocked.

2. 2

   Inspect all relevant filters in the heating medium circuit for blockages and clean them if necessary.

3. 3

   Ensure all valves in the heating system are open and there are no airlocks.

4. 4

   If the alarm recurs, contact a qualified NIBE service technician for further diagnosis.