Indoor Unit Communication Transmit Error

What does E8 mean?

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

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