Error E458 or E475 — Outdoor unit Fan error

What does E458, E475 mean?

These error codes indicate a problem with the outdoor unit's fan operation. This could be due to loose connections, a faulty fan motor, or issues with the inverter PCB that controls the fan.

• Loose or incorrect connection of fan connectors (CN90, CN91 or CN901) on the outdoor unit Inverter PBA.
• Problem with the power supply to the outdoor unit Inverter PCB.
• Faulty outdoor fan motor.
• A control problem that may require a software update.

Click steps to track your progress.

1. 1

   Turn off the main power to the outdoor unit. Wait at least 30 seconds before checking any components.

2. 2

   Check the fan connectors (CN90, CN91 or CN901) on the outdoor unit Inverter PBA to ensure they are correctly and securely connected.

3. 3

   Verify the power connection to the Inverter PCB of the outdoor unit.

4. 4

   If the error persists, there may be a fault with the fan motor itself or the Inverter PCB, which should be checked by a qualified service technician.

5. 5

   If a control problem is suspected, a software update might be required to resolve the issue.