Troubleshooting
4-7
PowerFlex 40 Adjustable Frequency AC Drive FRN 1.xx - 7.xx User Manual
Publication 22B-UM001I-EN-E
Drive does not respond to changes in speed command.
Motor and/or drive will not accelerate to commanded speed.
Cause(s)
Indication
Corrective Action
No value is coming from the
source of the command.
The drive “Run” indicator is lit
and output is 0 Hz.
•
Check
[Control Source] for
correct source.
•
If the source is an analog input,
check wiring and use a meter to
check for presence of signal.
•
Check
[Commanded Freq]
to verify correct command.
Incorrect reference source is
being selected via remote
device or digital inputs.
None
•
Check
[Control Source] for
correct source.
•
Check
[Dig In Status] to
see if inputs are selecting an
alternate source. Verify settings
for
[Digital Inx Sel].
•
Check
[Speed Reference]
for the source of the speed
reference. Reprogram as
necessary.
•
Review the Speed Reference
Control chart on
.
Cause(s)
Indication
Corrective Action
Acceleration time is excessive. None
Reprogram
[Accel Time 1] or
[Accel Time 2].
Excess load or short
acceleration times force the
drive into current limit, slowing
or stopping acceleration.
None
Compare
[Output Current] with
Remove excess load or reprogram
[Accel Time 1] or
[Accel
[Boost
Select] setting.
Speed command source or
value is not as expected.
None
Verify
[Commanded Freq].
Check
[Control Source] for the
proper Speed Command.
Programming is preventing the
drive output from exceeding
limiting values.
None
Check
[Maximum Freq] to
insure that speed is not limited by
programming.
Torque performance does not
match motor characteristics.
None
Set motor nameplate full load amps
in parameter
[Motor NP FLA].
Perform
[Autotune] “Static
Tune” or “Rotate Tune” procedure.
Set
[Torque Perf Mode] to
option 0 “V/Hz”.
22B-UM001.book Page 7 Tuesday, May 30, 2017 5:22 PM
Aotewell Ltd
www.aotewell.com Industry Automation
HongKong|UK|China [email protected]
