Indoor/Outdoor Miswiring (Converse) or Disconnection

What does Eb mean?

The connecting wiring between the indoor and outdoor units has been miswired (converse wiring) or a disconnection has occurred. This critical fault prevents proper communication and control between the units, leading to system malfunction.

• Reversed wiring connections between indoor and outdoor units.
• Disconnection in the communication wiring.
• Faulty wiring harness or connectors.
• Incorrect cable type used for communication.

Click steps to track your progress.

1. 1

   Check the connecting wiring between the indoor and outdoor units for correct phase and signal line connections.

2. 2

   Verify the continuity of the connecting wire, specifically checking for any breaks or disconnections in the S3 line.

3. 3

   Inspect the indoor controller board for any visible defects or damage.

4. 4

   Inspect the outdoor controller circuit board for any visible defects or damage.