Automation interface (AIF) communication error

What does it mean?

Communication error on the automation interface (AIF).

Common causes

• Faulty or interrupted transfer of control commands via AIF — usually a loosely seated communication module/keypad.

How to fix it

• Seat the communication module/keypad XT firmly (screw down if necessary), check the wiring at X4
• if necessary, switch off the monitoring (C0126 = 3).

After troubleshooting: de-energise the device completely (disconnect the 24 V supply and discharge the DC bus) before opening the covers.