111
4
TROUBLESHOOTING
Check first when you have a trouble
Parameter
Setting
Pr. 0 Torque boost setting is improper when V/F control is
used.
Increase Pr. 0 setting by 0.5% increments while
observing the rotation of a motor.
If that makes no difference, decrease the setting.
44
Pr. 78 Reverse rotation prevention selection is set.
Check the Pr. 78 setting.
Set Pr. 78 when you want to limit the motor rotation to
only one direction.
83
Pr. 79 Operation mode selection setting is wrong.
Select the operation mode which corresponds with input
methods of start command and frequency command.
31
Pr. 146 Built-in potentiometer switching setting is improper.
Set Pr. 146 ="1" (initial value) when not using FR-E500
operation panel (PA02).
88
Bias and gain (calibration parameter C2 to C7) settings
are improper.
Check the bias and gain (calibration parameter C2 to C7)
settings.
86
Pr. 13 Starting frequency setting is greater than the
running frequency.
Set running frequency higher than Pr. 13.
The inverter does not start if the frequency setting signal
is less than the value set in Pr. 13.
76
Frequency settings of various running frequency (such
as multi-speed operation) are zero.
Especially, Pr. 1 Maximum frequency is zero.
Set the frequency command according to the
application.
Set Pr. 1 higher than the actual frequency used.
45
Pr. 15 Jog frequency setting is lower than Pr. 13 Starting
frequency.
Set Pr. 15 Jog frequency higher than Pr. 13 Starting
frequency.
76
Operation mode and a writing device do not match.
Check Pr. 79, Pr. 338, Pr. 339, Pr. 551, and select an
operation mode suitable for the purpose.
47, 92
Start signal operation selection is set by the Pr. 250 Stop
selection
Check Pr. 250 setting and connection of STF and STR
signals.
90
Inverter decelerated to a stop when power failure
deceleration stop function is selected.
When power is restored, ensure the safety, and turn
OFF the start signal once, then turn ON again to restart.
Inverter restarts when Pr. 261="2".
91
Performing auto tuning.
When offline auto tuning ends, press of the
operation panel for the PU operation. For the External
operation, turn OFF the start signal (STF or STR).
This operation resets the offline auto tuning, and the
PU's monitor display returns to the normal indication.
(Without this operation, next operation cannot be
started.)
50
Automatic restart after instantaneous power failure
function or power failure stop function is activated.
(Performing overload operation with single-phase
power input specification model may cause voltage
insufficiency, and results in a detection of power failure.)
Disable the automatic restart after instantaneous
power failure function and power failure stop function.
Reduce the load.
Increase the acceleration time if the automatic restart
after instantaneous power failure function or power
failure stop function occurred during acceleration.
80, 91
Load
Load is too heavy. Reduce the load. —
Shaft is locked. Inspect the machine (motor). —
Others Operation panel display shows an error (e.g. E.OC1).
When any fault occurs, take an appropriate corrective
action, then reset the inverter, and resume the
operation.
97
Check
points
Possible Cause Countermeasures
Refer
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