Alarm Heat Pump Z1 pressure sensor high pressure JR1 faulty

What does 5440 mean?

This alarm indicates a fault with the high-pressure sensor JR1 for Heat Pump Z1. This could be due to a wiring issue or a defective sensor. It triggers after 3 faults in 2 hours, or 15 minutes of constant failure.

• Loose connection or gap in cabling at terminals 16, 18 on the I/O board.
• Defective I/O board.
• Defective pressure sensor JR1.

Click steps to track your progress.

1. 1

   Visually inspect the cabling and terminal connections 16 and 18 on the I/O board to ensure they are secure.

2. 2

   If the alarm persists, contact a qualified technician to diagnose the pressure sensor or I/O board.

3. 3

   Contact customer support for further assistance.