Troubleshooting 4-7
PowerFlex 4M Adjustable Frequency Drive FRN 1.xx - 2.xx User Manual
Publication 22F-UM001D-EN-E
Motor and/or drive will not accelerate to commanded speed.
Motor operation is unstable.
Drive will not reverse motor direction.
Drive does not power up.
Cause(s) Indication Corrective Action
Acceleration time is excessive. None Reprogram P109
[Accel Time 1] or
A401
[Accel Time 2].
Excess load or short
acceleration times force the
drive into current limit, slowing
or stopping acceleration.
None Compare d003
[Output Current] with
A441
[Current Limit].
Remove excess load or reprogram
P109
[Accel Time 1] or A401 [Accel
Time 2].
Check for improper A453
[Boost
Select] setting.
Speed command source or
value is not as expected.
None Verify d002
[Commanded Freq].
Check d012
[Control Source] for the
proper Speed Command.
Programming is preventing the
drive output from exceeding
limiting values.
None Check P105
[Maximum Freq] to
insure that speed is not limited by
programming.
Cause(s) Indication Corrective Action
Motor data was incorrectly
entered.
None 1. Correctly enter motor nameplate
data into P101
, P102 and P103.
2. Enable A436
[Compensation].
3. Use A453
[Boost Select] to
reduce boost level.
Cause(s) Indication Corrective Action
Digital input is not selected for
reversing control.
None Check [Digital Inx Sel] (See
page 3-13). Choose correct input
and program for reversing mode.
Digital input is incorrectly
wired.
None Check input wiring. (See page 1-14)
Motor wiring is improperly
phased for reverse.
None Switch two motor leads.
Reverse is disabled. None Check A434
[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 I/O 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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