BRIDGE RATING FAULT

What does 921 mean?

The system is unable to identify the drive's size. The bridge type, ampere rating, and current feedback scaling are determined by a sense resistor on the Cube ID PCB, which plugs into the A2 Armature Interface PCB. This fault occurs if the computer cannot identify this physical hardware. A DSD power down is required.

• J14 on the Main Control PCB is not properly seated.
• The Cube ID PCB is either missing or an incorrect type for the drive.
• Incorrect PCU software version is loaded in U13 & U14.
• A faulty Armature Interface PCB (A2).
• A faulty Drive Control PCB.

Click steps to track your progress.

1. 1

   Ensure that connector J14 on the Main Control PCB is properly seated.

2. 2

   Verify that the correct Cube ID PCB is installed and present on the A2 Armature Interface PCB.

3. 3

   Check that the correct PCU software version is installed in U13 & U14.

4. 4

   If issues persist after checking connections and software, replace the Armature Interface PCB (A2) or the Drive Control PCB.

5. 5

   Perform a DSD power down.