Communication Loss Event 16

What does 16 mean?

Communication has been lost between system components. This can be caused by loose or shorted wiring, a user interface that isn't powered, a data bus locked up by power issues, or a damaged outdoor unit (ODU) control board.

• Loose wire or shorted leads
• User Interface isn’t powered
• Data Bus locked up by power loss, brownout or glitch
• Damaged ODU control

Click steps to track your progress.

1. 1

   Verify all communications wiring (ABCD) for loose connections, stripped wires, or shorts to ground or between wires.

2. 2

   Check that the User Interface is receiving power from the indoor product.

3. 3

   Cycle the power to the entire system to attempt to reset the data bus.

4. 4

   If the issue persists after these checks, the ODU control might be damaged and require replacement.