591
6. PROTECTIVE FUNCTIONS
6.5 Check first when you have a trouble
3
4
5
5
5
6
7
8
9
10
6.5.9 Operation mode is not changed properly
6.5.10 Operation panel display is not operating
6.5.11 Motor current is too large
Check
points
Possible cause Countermeasure Refer to
page
Input signal Start signal (STF or STR) is ON. Check that the STF and STR signals are off.
When either is ON, the operation mode cannot be changed.
50, 550
Parameter
setting
Pr.79 Operation mode selection setting is
improper.
When the Pr.79 is set to "0 (initial value)", the operation mode
is the External operation mode at power ON. To switch to the
PU operation mode, press on the operation panel (press
on the parameter unit (FR-PU07)). At other settings (1 to
4, 6, 7), the operation mode is limited accordingly.
204
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.
204, 214
Check
points
Possible cause Countermeasure Refer to
page
Main circuit Power is not input. Input the power. 39
Control
circuit
Front cover Operation panel is not properly connected to
the inverter.
Check if the inverter front cover is installed securely. 28
Check
points
Possible cause Countermeasure Refer to
page
Parameter
setting
Torque boost (Pr.0, Pr.46) setting is improper
under V/F control, so the stall prevention
function is activated.
Increase/decrease the Pr.0 Torque boost setting value by
0.5% increments so that stall prevention does not occur.
538
V/F pattern is improper when V/F control is
performed.
(Pr.3, Pr.14, Pr.19)
Set rated frequency of the motor to Pr.3 Base frequency.
Use Pr.19 Base frequency voltage to set the base voltage (for
example, rated motor voltage).
539
Change Pr.14 Load pattern selection according to the load
characteristic.
541
Stall prevention function is activated due to a
heavy load.
Reduce the load weight. ―
Set Pr.22 Stall prevention operation level higher according to
the load. (If Pr.22 is set too high, an overcurrent trip (E.OC[]) is
likely to occur.)
257
Check the capacities of the inverter and the motor. ―
Offline auto tuning is not performed under
Advanced magnetic flux vector control.
Perform offline auto tuning. 353
When PM motor control is selected for a PM
motor, and offline auto tuning is not performed.
Perform offline auto tuning for a PM motor. 363
To Next Page
Loading...
Need help?
General
