P5 - Over-current protection

What does P5 mean?

This error means the compressor's instantaneous current has exceeded the set protection value, causing the system to shut down. This can be due to high load or wiring issues. The ODU main board LED displays this code.

• System load is too much and compressor current is too large
• Compressor 3-phase wire connection is out of phase
• Compressor wire is loose or has bad contact
• Drive board current sampling circuit element is damaged
• Compressor is damaged

Click steps to track your progress.

1. 1

   Check if the compressor is running at high frequency and high load. Reduce load if possible.

2. 2

   Verify the compressor 3-phase wire connections are correct and secure. Reconnect or replace wires if loose or incorrect.

3. 3

   Replace the drive board if its current sampling circuits are damaged.

4. 4

   Replace the compressor if it is damaged.