RIPPLE FAULT

What does 909 mean?

Repeated high peak to average motor armature current is detected. This condition may be caused by defective hardware, poor regulator tuning, or other oscillatory operation conditions.

• Defective hardware (can be discovered through PCU Diagnostics CDU function #998).
• Poor regulator tuning.
• Other oscillatory operation conditions.

Click steps to track your progress.

1. 1

   Use the PCU Diagnostics CDU function #998 to check for defective hardware.

2. 2

   Adjust regulator tuning parameters.

3. 3

   Investigate and correct other oscillatory operation conditions.