Remote Controller Transmit Error (Remote Controller Side)

What does E4 mean?

The remote controller has detected an error in transmitting signals to the indoor unit or other system components. This indicates a problem with the remote controller's transmission circuit or its communication line, preventing it from sending control commands or status requests.

• Remote controller fails to transmit signals to the indoor unit.
• Faulty remote controller internal circuitry or communication module.
• Power supply issue to the remote controller.
• Obstruction or damage to the remote controller's transmitter.

Click steps to track your progress.

1. 1

   Verify the remote controller model is an MA remote controller (PAR-21MAA) as specified.

2. 2

   Inspect the transmission wire connected to the remote controller for signs of electrical noise interference.

3. 3

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