UA — Indoor-outdoor unit combination fault

What does UA mean?

This code indicates a fault related to how the indoor and outdoor units are communicating or operating together. It's a general combination error.

• Communication error between units
• Mismatched indoor/outdoor units
• System configuration issue

Click steps to track your progress.

1. 1

   Ensure the indoor and outdoor units are compatible and correctly configured.

2. 2

   Check wiring connections between the units.

3. 3

   Consult the installation manual or a technician to verify system setup.