Error 464 — Over-current of inverter compressor 1

What does 464 mean?

Inverter compressor 1 is drawing excessive electrical current, which has triggered a safety shutdown. This protects the compressor and inverter drive from damage due to overload.

• Compressor malfunction or mechanical binding
• Refrigerant overcharge or liquid floodback
• Inverter PBA (Printed Board Assembly) fault
• Low voltage supply to the outdoor unit

Click steps to track your progress.

1. 1

   Turn off the outdoor unit immediately at the main electrical panel.

2. 2

   Allow the unit to cool down for at least 30 minutes.

3. 3

   Check for any external factors that might be putting excessive load on the system (e.g., extremely dirty coils).

4. 4

   This issue requires a qualified HVAC technician to diagnose the root cause of the over-current.

5. 5

   Do not attempt to operate the unit until it has been inspected by a professional.