4-8 Troubleshooting
Motor and/or drive will not accelerate to commanded speed.
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 b003
[Output Current] with
A089
[Current Limit 1].
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 b002
[Commanded Freq].
Check b012
[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.
Verify programming of E215
[Speed
Ratio].
Torque performance does not
match motor characteristics.
None Set motor nameplate full load amps
in parameter A126
[Motor NP FLA].
Perform A127
[Autotune] “Static
Tune” or “Rotate Tune” procedure.
Set A125
[Torque Perf Mode] to
option 0 “V/Hz”.
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