Perm. com. error SAM 40 — Permanent communication fault with SAM 40 accessory card

What does 86 mean?

There is a permanent communication fault with the SAM 40 accessory card, which is activated in menu 5.2. This prevents communication with the card.

• Communication cables to the SAM 40 card are incorrect or incorrectly installed.
• Fault in the communication circuits within the accessory, input, or display card.
• Incorrect address set on the dipswitch of the SAM 40 card.
• The SAM 40 accessory card itself may be faulty.

Click steps to track your progress.

1. 1

   Turn off the Heat Pump at the main power supply.

2. 2

   Check all communication cables connected to the SAM 40 accessory card for secure and correct connections.

3. 3

   If applicable, verify the dipswitch settings on the accessory card match the system configuration activated in menu 5.2.

4. 4

   Restore power to the Heat Pump and check if the alarm has cleared.

5. 5

   If the problem persists, contact a qualified NIBE service technician for diagnosis.