306
Check first when you have a trouble
5.5.5
Motor rotates in the opposite direction
5.5.6
Speed greatly differs from the setting
5.5.7
Acceleration/deceleration is not smooth
Check
points
Possible Cause
Countermeasures
Refer
to
page
Main
Circuit
Phase sequence of output terminals U, V and W is
incorrect.
Connect phase sequence of the output cables (terminal
U, V, W) to the motor correctly
Input
signal
The start signals (forward rotation, reverse rotation) are
connected improperly.
Check the wiring. (STF: forward rotation, STR: reverse
rotation)
Adjustment by the output frequency is improper during
the reversible operation with
Pr. 73 Analog input selection
setting.
Check the setting of
Pr. 125, Pr. 126, C2 to C7.
Parameter
Setting
Pr. 40 RUN key rotation direction selection
setting is
incorrect.
Check the
Pr. 40
setting.
Check
points
Possible Cause
Countermeasures
Refer
to
page
Input
signal
Frequency setting signal is incorrectly input.
Measure the input signal level.
—
The input signal lines are affected by external EMI.
Take countermeasures against EMI such as using
shielded wires for input signal lines.
Parameter
Setting
Pr. 1, Pr. 2, Pr. 18, calibration parameter C2 to C7
settings
are improper.
Check the settings of
Pr. 1 Maximum frequency, Pr. 2
Minimum frequency, Pr. 18 High speed maximum frequency.
Check the
calibration parameter C2 to C7
settings.
Pr. 31 to Pr. 36 (frequency jump)
settings are improper.
Narrow down the range of frequency jump.
Load
Stall prevention function is activated due to a heavy
load.
Reduce the load weight.
—
Parameter
Setting
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 ).)
Motor
Check the capacities of the inverter and the motor.
—
Check
points
Possible Cause
Countermeasures
Refer
to
page
Parameter
Setting
The base frequency does not match the motor
characteristics.
For V/F control, set
Pr. 3 Base frequency and Pr. 47 Second
V/F (base frequency)
.
For Advanced magnetic flux vector control or General-
purpose magnetic flux vector control, set
Pr. 84 Rated
motor frequency
.
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 ).)
Check the capacities of the inverter and the motor.
—
Acceleration/deceleration time is too short.
Increase acceleration/deceleration time.
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.
Regeneration avoidance operation is performed
If the frequency becomes unstable during regeneration
avoidance operation, decrease the setting of
Pr. 886
Regeneration avoidance voltage gain
.
Summary of Contents for FR-E710W-0.1K
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