E466 (Red Blink, Green ON, Yellow OFF) — DC-Link voltage under/over error

What does E466 mean?

The outdoor unit's PCB LED displays E466 when the DC-Link voltage within the inverter circuit is outside its normal operating range (either too low or too high). This indicates a power supply or inverter component issue.

• Unstable or incorrect AC power supply to the unit
• Faulty DC-Link capacitor
• Malfunction on the inverter control board

Click steps to track your progress.

1. 1

   Check your home's main power supply for any recent fluctuations, brownouts, or outages.

2. 2

   Turn off the main power to the outdoor unit at the circuit breaker for 10 minutes.

3. 3

   Restore power and attempt to restart the system.

4. 4

   If the error persists, contact a qualified technician to inspect the power supply and inverter components.