PA - AC Current Protection

What does PA mean?

The input AC current has exceeded the set protection value, causing the system to shut down. This can be due to system load, grid voltage issues, or drive board problems. This code is shown on the ODU main board LED.

• System is heavy-loaded and compressor current is too large
• Grid voltage is abnormal
• PFC module is damaged
• Drive board PFC current sampling circuit element 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 if the grid voltage is normal.

3. 3

   Replace the drive board if the PFC module or PFC current sampling circuits are damaged.