E464 (Red Blink, Green OFF, Yellow OFF) — IPM (IGBT Module) Over Current (O.C)

What does E464 mean?

The outdoor unit's PCB LED displays E464 when the Inverter Power Module (IPM) or IGBT module experiences an overcurrent condition. This indicates a potential fault in the inverter circuit responsible for motor control.

• Faulty IPM module
• Compressor malfunction drawing excessive current
• Short circuit in motor wiring

Click steps to track your progress.

1. 1

   Turn off the main power to the outdoor unit at the circuit breaker.

2. 2

   Wait for at least 10 minutes to allow the system to reset and any components to cool down.

3. 3

   Restore power and attempt to restart the system.

4. 4

   This error often indicates a component failure within the inverter, which requires service by a qualified technician.