Справочник Пользователя для Mitsubishi Electronics FR-A700

 was pressed.

(Operation panel indication is 

(PS).)

During the External operation mode, check the method of 

restarting from a 

 input stop from PU.

Two-wire or three-wire type connection is wrong.

Check the connection.
Connect STOP signal when three-wire type is used.

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.

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.

Pr. 79 Operation mode selection setting is wrong.

Select the operation mode which corresponds with input 
methods of start command and frequency command.

Bias and gain (calibration parameter C2 to C7) settings 
are improper.

Check the bias and gain (calibration parameter C2 to C7) 
settings.

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.

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.

Pr. 15 Jog frequency setting is lower than Pr. 13 Starting 
frequency.

Set Pr. 15 Jog frequency higher than Pr. 13 Starting frequency.

The Pr.359 Encoder rotation direction setting is incorrect 
under encoder feedback control or under vector control. 

If the "REV" on the operation panel is lit even though the 
forward-rotation command is given, set Pr. 359 ="1." 

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. 

313, 

Start signal operation selection is set by the Pr. 250 Stop 
selection

Check Pr. 250 setting and connection of STF and STR 
signals.

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, 12".

Auto tuning is being performed.

In the PU operation, press 

 on the operation panel 

after the offline auto tuning completes.
In the External operation, turn OFF the start signal (STF, 
STR).
By this operation, offline auto tuning is cancelled, and the 
monitor display on the PU goes back to normal.
(If this operation is not performed, you cannot proceed to 
the next operation.)

Automatic restart after instantaneous power failure 
function or power failure stop function is activated.
(Performing overload operation during input phase loss 
may cause voltage insufficiency, and that may result in 
detection of power failure.)

Set Pr. 872 Input phase loss protection selection = "1" (input 
phase failure protection active).
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.

266, 
270, 

Load is too heavy.

Reduce the load.

—

Shaft is locked.

Inspect the machine (motor).

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