Error E45 / Outdoor Red LED Flashes Once — Inverter and outdoor PCB transmission error

What does E45 / Outdoor Red LED 1 flash mean?

Error E45, shown by one flash of the outdoor unit's red LED, indicates a transmission error between the inverter and the outdoor unit PCB. This could be due to a loose connection of the CnI cable.

• Transmission error between inverter and outdoor unit PCB
• Loose connection of (CnI)

Click steps to track your progress.

1. 1

   Turn off the main power supply to the outdoor unit.

2. 2

   Inspect the CnI connection cable between the inverter and the outdoor unit PCB.

3. 3

   Ensure the connection is secure and free from any damage or corrosion.

4. 4

   If the connection is found to be loose, gently reseat it.

5. 5

   Restart the air conditioner system after verifying connections. If the error persists, professional service is needed.