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Jeffery BlackburnAug 8, 2025
How to troubleshoot Emerson Controller when motor won’t start?
- Kkatie19Aug 8, 2025
If the motor won’t start with the Emerson Controller, first ensure the rated AC line voltage is applied to the controller. Check that the operator controls are functioning correctly and connected properly. Verify that a wire jumper or switch connects E1 to E2, closing the circuit. Try initiating a Stop command and then a Start command to reset the controller. Make sure +24 VDC is applied to Terminal TB2 8 to enable the controller. Check for a 0 - 10 VDC speed reference signal. Turn the ACCEL and CUR LMT potentiometers fully counterclockwise (100%). Check the motor shunt field and associated circuitry for a loose connection or a broken wire. Repair or replace the motor if it has failed, or replace the control board if it has failed.
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