GE Industrial Solutions AF-650 GP Drive Panel - Manual (Page 26)

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6. Troubleshooting
Drive and Bypass Motor Rotation
If careful attention to phase rotation is not made during connection of the panel to the three-phase power
supply and motor, then there is only a one chance in four that the motor will rotate correctly in both drive and
bypass modes.
The other three possibilities and the corresponding corrective actions are as follows:
 Problem: Motor turns correctly in Bypass mode and incorrectly in Drive mode.
Solution: Swap two of three line power leads AND two of three motor leads.
 Problem: Motor turns correctly in Drive mode and incorrectly in Bypass mode.
Solution: Swap two of three line power leads.
 Problem: Motor turns incorrectly in both modes.
Solution: Swap two of three motor leads.
Note that if the rotation in bypass mode is opposite to the rotation in drive mode, it is possible that the panel’s
motor overload will trip if a full-speed transition between modes is attempted. This is due to the large amount
of current required to decelerate the motor to a stop prior to accelerating it in the correct direction.
DEH40652 – Page 19 AN 11-2021 Rev 06, 12/16/2011