6.6.10 Operation panel (FR-DU07) display is not operating
Power is not input.
Operation panel is not properly connected to the
6.6.11 Motor current is too large
Torque boost (Pr. 0, Pr. 46) setting is improper under V/F
control, so the stall prevention function is activated.
V/F pattern is improper when V/F control or Simple
magnetic flux vector control is performed.
(Pr. 3, Pr. 14, Pr. 19)
Stall prevention function is activated due to a heavy
Check first when you have a trouble
Input the power.
Check if the inverter front cover is installed securely.
The inverter cover may not fit properly when using wires
whose size are 1.25mm
or larger, or when using many
wires, and this could cause a contact fault of the
Increase/decrease Pr. 0 Torque boost setting value by
0.5% increments to the setting.
Set rated frequency of the motor to Pr. 3 Base frequency.
(V/F control, Simple magnetic flux vector control)
Use Pr. 19 Base frequency voltage to set the base voltage
(e.g. rated motor voltage). (V/F control, Simple magnetic
flux vector control)
Change Pr. 14 Load pattern selection according to the load
characteristic. (V/F control)
Reduce the load weight.
Set Pr. 22 Stall prevention operation level higher according
to the load. (Setting Pr. 22 too large may result in
frequent overcurrent trip (E.OC ).)
Check the capacities of the inverter and the motor.