OPEN SCR

What does F912 mean?

This fault is detected by the PCU Diagnostics function (Function #998) and indicates that one or more SCRs (Silicon Controlled Rectifiers) or doubler packs within the DSD 412 drive are open, meaning they are not conducting current as expected.

• Failure of an SCR or doubler pack, resulting in an open circuit.

Click steps to track your progress.

1. 1

   Remove power from the drive.

2. 2

   Consult Section 5, MAINTENANCE, to identify and replace the open SCR(s).

3. 3

   Repeat the PCU Diagnostics function to confirm the issue is resolved.