Rockwell Automation DC3R Regenerative DC Drive User Guide 1/4 - 2 HP, 115/230 VAC - Manual (Page 49)

41 Troubleshooting
Motor will not reach the desired speed
ATTENTION: The control circuit is at line potential when the drive is
energized. Use a non-metallic screwdriver when making adjustments to
the circuit board potentiometers. Exercise extreme caution as
hazardous voltage exists. Failure to observe these precautions could
result in severe bodily injury of loss of life.
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1. Check the MAX SPD setting and increase if necessary.
2. Check that the IR COMP setting is not set too low.
3. Check that the motor is not overloaded.