4-8 Troubleshooting
Motor operation is unstable.
Drive will not reverse motor direction.
Drive does not power up.
Cause(s) Indication Corrective Action
Motor data was incorrectly
entered.
None 1. Correctly enter motor nameplate
data into P031
, P032 and P033.
2. Enable A194
[Compensation].
3. Use A170
[Boost Select] to
reduce boost level.
Cause(s) Indication Corrective Action
Digital input is not selected for
reversing control.
None Check T051
- T054 [Digital Inx Sel]
and P036
[Start Source]. Choose
correct input and program for
reversing mode.
Digital input is incorrectly
wired.
None Check input wiring. (See page 1-18)
Motor wiring is improperly
phased for reverse.
None Switch two motor leads.
Reverse is disabled. None Check A166
[Reverse Disable].
Cause(s) Indication Corrective Action
No input power to drive. None Check the power circuit.
• Check the supply voltage.
• Check all fuses and disconnects.
Jumper between Power
Terminals P2 and P1 not
installed and/or DC Bus
Inductor not connected.
None Install jumper or connect DC Bus
Inductor.
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