Error 84 - BSB, address collision

What does 84 mean?

The user interface displays '84: BSB, address collision', indicating that two devices on the BSB bus (Building System Bus) have been assigned the same address, causing a communication conflict. This error typically triggers an automatic reset.

• Incorrect device addressing during installation.
• Multiple devices with factory default addresses on the bus.
• Configuration error in the system settings.

Click steps to track your progress.

1. 1

   Turn off the main power supply to the heat pump for 30 seconds, then turn it back on.

2. 2

   Access the control system settings (if possible) and check device addresses for connected BSB components.

3. 3

   Allow time for the automatic reset to occur (default 6 hours) or use the manual reset function (Line 6711) if available.

4. 4

   Contact a qualified service technician to reconfigure the BSB device addresses.