Comm.fault In 170 — Communication fault with entry card AA3

What does Comm.fault In 170 mean?

This information message indicates a communication fault occurred with the entry card (AA3). It resets automatically when communication is resumed.

• Temporary communication interruption
• Loose connection to the entry card AA3

Click steps to track your progress.

1. 1

   Check all communication cables and connections to the entry card AA3.

2. 2

   Ensure cables are securely connected.

3. 3

   If this message reappears frequently, contact a service technician.