Rockwell Automation DC3R Isolation Option Board - Manual (Page 22)

16 Troubleshooting
If there is no output
1. Measure the voltage output signal across terminals 1 and 2 (OUT1 and OUT2).
If there is a DC voltage present and there is no DC motor output, then check the
connections to the regenerative drive that it is connected to.
2. Check the voltage at terminals 3 and 4 (L1 and L2). If there is no voltage then
check the connections to the regenerative drive that it is connected to.
3. Check that the isolation option board board is receiving a voltage (or current)
input signal.
4. Check to see that the signal input ADJ trimmer potentiometer (P501) is not set
to the full CCW position.
If the unit is running at full speed
1. Check that the voltage output signal across terminals 1 and 2 (OUT1 and OUT2)
changes when the voltage (or current) input signal changes.
2. Check the wiring to the isolation option board board to the regenerative drive.
If the unit runs too slow or too fast
1. Check SW501 positions.
2. Check MIN SPD and MAX SPD trimpot calibrations.
If unit does not reverse
Check POL REV and COM connections.