RIPPLE FAULT

What does 909 mean?

Repeated instances of high peak-to-average motor armature current are detected. This condition can be caused by defective hardware, inadequate regulator tuning, or other oscillatory operating conditions.

• Defective hardware components, which can be diagnosed using the PCU Diagnostics CDU function #998.
• Poor tuning or configuration of the drive's current regulator.
• Other conditions leading to oscillatory operation within the motor or drive system.

Click steps to track your progress.

1. 1

   Execute the PCU Diagnostics CDU function #998 to identify any defective hardware.

2. 2

   Review and adjust the drive's regulator tuning parameters to stabilize current ripple.