287
Check first when you have a trouble
5
PR
O
T
E
C
T
IV
E
F
U
N
C
T
IO
N
S
5.5.10 Operation panel (FR-DU07) display is not operating
5.5.11 Motor current is too large
Check
points
Possible Cause
Countermeasures
Refer
to
page
Main
Circuit,
Control
Circuit
Power is not input.
Input the power.
12
Front
cover
Operation panel is not properly connected to the
inverter.
Check if the inverter front cover is installed securely.
The inverter cover may not fit properly when using wires
whose size are 1.25mm
2
or larger, or when using many
wires, and this could cause a contact fault of the
operation panel.
5
Check
points
Possible Cause
Countermeasures
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
Pr. 0 Torque boost
setting value by
0.5% increments to the setting.
67
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
(e.g. rated motor voltage).
78
Change
Pr. 14 Load pattern selection
according to the load
characteristic.
80
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. (Setting
Pr. 22
too large may result in
frequent overcurrent trip (E.OC
).)
70
Check the capacities of the inverter and the motor.
—
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