Error 201 — Communication error between indoor and outdoor units

What does 201 mean?

A communication error exists between the indoor and outdoor units. This can be caused by installation number settings, repeated indoor unit addresses, or cable issues.

• Incorrect installation number setting
• Duplicate indoor unit addresses
• Faulty indoor unit communication cable

Click steps to track your progress.

1. 1

   Verify the installation number settings are correct.

2. 2

   Ensure all indoor units have unique addresses.

3. 3

   Inspect the communication cable between indoor and outdoor units for damage or loose connections.

4. 4

   Power cycle the entire system.