Mitsubishi Electric FR-E700 Instruction Manual page 471
Frequency inverter
Hide thumbs
Also See for FR-E700:
- Instruction manual (608 pages) ,
- Basic instruction manual (149 pages) ,
- Installation manuallines (38 pages)
Table of Contents
Troubleshooting
Check points Possible Cause
Parameter
Setting
Load
Others
FR-E700 EC
Pr. 0 "Torque boost" setting is improper
when V/F control is used.
Pr. 78 "Reverse rotation prevention selec-
tion" is set.
Pr. 79 "Operation mode selection" setting
is wrong.
Bias and gain (calibration parameter C2 to
C7) settings are improper.
Pr. 13 "Starting frequency" setting is
greater than the running frequency.
Frequency settings of various running fre-
quency (such as multi-speed operation)
are zero. Especially, Pr. 1 "Maximum fre-
quency" is zero.
Pr. 15 "Jog frequency" setting is lower
than Pr. 13 "Starting frequency".
Operation mode and a writing device do
not match.
Start signal operation selection is set by
the Pr. 250 "Stop selection".
Inverter decelerated to a stop when power
failure deceleration stop function is
selected.
Performing auto tuning.
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.)
Load is too heavy.
Shaft is locked.
Operation panel display shows an error
(e.g. E.OC1).
Check first when you have troubles
Countermeasures
Increase Pr. 0 setting by 0.5% increments
while observing the rotation of a motor.
If that makes no difference, decrease the
setting.
Check the Pr. 78 setting.
Set Pr. 78 when you want to limit the motor
rotation to only one direction.
Select the operation mode which corre-
sponds with input methods of start com-
mand and frequency command.
Check the bias and gain (calibration
parameter C2 to C7) settings.
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.
Set the frequency command according to
the application. Set Pr. 1 higher than the
actual frequency used.
Set Pr. 15 "Jog frequency" higher than
Pr. 13 "Starting frequency".
Check Pr. 79, Pr. 338, Pr. 339, Pr. 550,
Pr. 551, and select an operation mode
suitable for the purpose.
Check Pr. 250 setting and connection of
STF and STR signals.
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".
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 tun-
ing, and the PU's monitor display returns
to the normal indication.
(Without this operation, next operation
cannot be started.)
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.
Reduce the load.
Inspect the machine (motor).
When any fault occurs, take an appropri-
ate corrective action, then reset the
inverter, and resume the operation.
Refer to
page
6-33
6-194
6-201
6-180
6-73
6-50
6-61
6-198,
6-212
6-120
6-162
6-88
6-151,
6-162
—
—
7-2
7 - 21
- Quick Links:
- List of Alarm Display
Hide quick links:
Table of Contents
