Error 205 — Communication error on all PBA within outdoor unit C-Box

What does 205 mean?

There is a communication error among all Printed Circuit Boards (PBAs) within the outdoor unit's Control Box (C-Box). This indicates a serious internal issue.

• Internal wiring problem within the C-Box
• Faulty C-Box PBA
• Power supply issue to the C-Box components

Click steps to track your progress.

1. 1

   Check the external connections to the outdoor unit's C-Box.

2. 2

   Ensure the C-Box has a stable power supply.

3. 3

   This error typically requires a qualified technician to open the C-Box and diagnose internal board communication.

4. 4

   Do not attempt internal repairs without proper training.