Rockwell Automation 22A PowerFlex 4 User Manual FRN 6.xx - Manual (Page 71)

Troubleshooting 4-7
Motor and/or drive will not accelerate to commanded speed.
Motor operation is unstable.
Drive will not reverse motor direction.
Cause(s) Indication Corrective Action
Acceleration time is excessive. None Reprogram P039 [Accel Time 1] or
A067 [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
A089 [Current Limit].
Remove excess load or reprogram
P039 [Accel Time 1] or A067 [Accel
Time 2].
Check for improper
A084 [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 P035 [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 P031 , P032 and P033 .
2. Enable A097 [Compensation].
3. Use A084 [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 1-13)
Motor wiring is improperly
phased for reverse. None Switch two motor leads.
Reverse is disabled. None Check A095 [Reverse Disable].