Mitsubishi Electric 800 Series, Инструкция по эксплуатации, Страница: 650 / 727

Check first when you have a trouble
PROTECTIVE FUNCTIONS
649
6
Input
signal
For the separated converter type, terminals
RDA and SE of the converter unit are not
connected to terminals MRS (X10 signal) and
SD (PC for source logic) of the inverter
respectively.
Check for the wiring.
Refer to the
Instruction
Manual
(Hardware)
of the FR-
A862.
Two-wire or three-wire type connection is
incorrect.
Check the wiring.
Use the Start self-holding selection (STP (STOP)) signal when
the three-wire type is used.
421
Parameter
setting
Under V/F control, Pr.0 Torque boost setting
is improper.
Increase the Pr.0 setting by 0.5% increments while observing
the rotation of a motor.
If that makes no difference, decrease the setting. 589
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.
308
Pr.79 Operation mode selection setting is
incorrect.
Select the operation mode which corresponds with input
methods of start command and frequency command.
291
Bias and gain (Pr.902 to Pr.905) settings are
improper.
Check the bias and gain (Pr.902 to Pr.905) settings. 402
Pr.13 Starting frequency setting is greater
than the set frequency.
Set frequency higher than Pr.13 .
The inverter does not start if the frequency setting signal is less
than the value set in
Pr.13 .
283 , 284
Frequency settings of various set 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.
314 , 329
Pr.15 Jog frequency is lower than Pr.13
Starting frequency for JOG operation.
Set Pr.15 higher than Pr.13 .
283 , 284 ,
312
The Pr.359 (Pr.852) 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 (Pr.852) = "1".
64 , 619
When a vector control compatible option is
used, the option to be used and parameter
settings do not match.
Correctly set Pr.862 Encoder option selection according to
the option to be used.
141
Operation mode and a writing device do not
correspond.
Check Pr.79 Operation mode selection, Pr.338
Communication operation command source, Pr.339
Communication speed command source, Pr.550 NET mode
operation command source selection
and Pr.551 PU mode
operation command source selection , and select an
operation mode suitable for the purpose.
291 , 301
Start signal operation selection is set by
Pr.250 Stop selection .
Check the Pr.250 setting and the connection of STF and STR
signals.
421
The motor has 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.
When
Pr.261 Power failure stop selection = "2 or 12", the
motor automatically restarts after the power is restored.
526
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.)
426 , 523
The automatic restart after instantaneous
power failure function or power failure stop
function has been 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 function was activated
during acceleration.
326 , 515 ,
526
The motor test operation is selected under
vector control or PM sensorless vector control.
Check the Pr.800 Control method selection setting. 137
When the FR-CC2 is used, the input logic
setting of the X10 signal is incorrect.
Set Pr.599 ="0" to use the X10 signal with the NO contact input
specification, and Pr.599 ="1" (initial value for separated
converter types) to use the X10 signal with the NC contact input
specification.
608
Load
Load is too heavy. Reduce the load. ―
Shaft is locked. Inspect the machine (motor). ―
Check
points
Possible cause Countermeasure
Refer to
page