PU — Charge loop error

What does PU mean?

When charging begins, the system did not reach the required busbar voltage within the set time, indicating a charge loop error. The system has shut down for protection. This is shown as 'PU' on the ODU main board LED display.

• Abnormal or too low grid voltage
• Abnormal charge loop element on the drive board
• Damaged drive board voltage sampling circuit
• Abnormal drive board busbar voltage sampling AD terminal

Click steps to track your progress.

1. 1

   Check if the grid voltage is normal and sufficient.

2. 2

   If grid voltage is abnormal, contact support.

3. 3

   If grid voltage is normal, suspect a drive board issue and contact support.