What does 904 mean?

The AC input power has dropped below 80% of the Nominal AC Line Voltage #9 for 3 consecutive cycles or lower than 50% for one cycle. This sets the Severe Fault flag and forces the DSD 412 current reference to zero, shutting down the drive.

• AC input power issues (voltage sag or prolonged low voltage).

Click steps to track your progress.

1. 1

   Measure the AC input power voltage to ensure it stays above 80% of Nominal AC Line Voltage #9.

2. 2

   Verify the stability of the AC input power supply.