Serial signal error indicated after 6 minutes — Communication or wiring fault

What does Serial signal error indicated 6 minutes later mean?

A serial signal error is indicated after 6 minutes of operation. This suggests a communication problem between the indoor and outdoor units or an issue with the connecting wires.

• Serial signal communication failure
• Miswiring or poor connection of indoor/outdoor wires
• Damaged connecting wire

Click steps to track your progress.

1. 1

   Check the indoor/outdoor connecting wire for any miswiring, poor contact, or disconnections.

2. 2

   Ensure the serial signal is being transmitted correctly.

3. 3

   If the error persists, consider replacing the indoor/outdoor connecting wire.