Outdoor Unit Communication Transmit Error

What does E0 mean?

The outdoor unit has detected an error in transmitting communication signals to the indoor unit. This suggests a problem with the outdoor unit's communication circuit or the signal path, preventing it from sending operational data or control responses.

• Outdoor unit fails to transmit data packets to the indoor unit.
• Faulty communication transmitter chip on the outdoor unit PCB.
• Communication bus contention or collision on the outdoor unit side.
• Power supply issue to the outdoor unit's communication circuitry.

Click steps to track your progress.

1. 1

   Verify the indoor/outdoor connecting wire terminations match the wiring diagram for correct connection.

2. 2

   Inspect the indoor/outdoor connecting wire and power supply for signs of electrical noise interference that could disrupt signal transmission.

3. 3

   Cycle power to the unit (turn off, then on again) to re-check for the error.