Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 552 / 608

Check first when you have troubles Troubleshooting
7 - 24
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 set-
ting.
6-35
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.
6-197
Pr. 79 "Operation mode selection" setting is
wrong.
Select the operation mode which corre-
sponds with input methods of start com-
mand and frequency command.
6-209
Bias and gain (calibration parameter C2 to
C7) settings are improper. Check the bias and gain (calibration parame-
ter C2 to C7) settings.
6-183
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 set-
ting signal is less than the value set in Pr. 13.
6-75
Frequency settings of various running fre-
quency (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.
6-52
Pr. 15 "Jog frequency" setting is lower than Pr.
13 "Starting frequency". Set Pr. 15 "Jog frequency" higher than Pr. 13
"Starting frequency".
6-63
Operation mode and a writing device do not
match.
Check Pr. 79, Pr. 338, Pr. 339, Pr. 550, Pr. 551,
and select an operation mode suitable for
the purpose.
6-206,
6-220
Start signal operation selection is set by the
Pr. 250 "Stop selection". Check Pr. 250 setting and connection of STF
and STR signals.
6-122
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".
6-165
Performing auto tuning.
When offline auto tuning ends, press the
STOP/RESET key 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 can-
not be started.)
6-90
Automatic restart after instantaneous power
failure function or power failure stop func-
tion is activated.
(Performing overload operation with single-
phase power input specification model may
cause voltage insufficiency, and results in a
detection of power failure.)
앫
Disable the automatic restart after
instantaneous power failure function
and power failure stop function.
앫
Reduce the load.
앫
Increase the acceleration time if the
automatic restart after instantaneous
power failure function or power failure
stop function occurred during
acceleration.
6-153,
6-165
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. 7-2
Check Points Possible Cause Countermeasures
Refer to
Page