5-6
5.2 General troubleshooting
Status Checking point Remedy
Motor runs in
wrong
direction
Is the wiring for the output terminals
correct?
Wiring must match U, V, and W terminals of the
motor.
Is the wiring for forward and reverse
signals correct?
Check for correct wiring.
The motor
speed can not
be regulated.
Is the wiring for the analog frequency
inputs correct?
Check for correct wiring.
Is the setting of operation mode
correct?
Check the Frequency Source set in parameters
00-05/00-06.
Is the load too excessive? Reduce the load.
Motor running
speed too
high or too
low
Check the motor specifications
(poles, voltage…) correct?
Confirm the motor specifications.
Is the gear ratio correct? Confirm the gear ratio.
Is the setting of the highest output
frequency correct?
Confirm the highest output frequency
Motor speed
varies
unusually
Is the load too excessive? Reduce the load.
Does the load vary excessively?
1.Minimize the variation of the load.
2.Consider increasing the capacities of the inverter
and the motor.
Is the input power unstable or is
there a phase loss ?
1.Consider adding an AC reactor at the power input
side if using single-phase power.
2.Check wiring if using three-phase power
Motor can not
run
Is the power connected to the correct
L1, L2, and L3 terminals?
is the charging indicator lit ?
1.Is the power applied?
2.Turn the power OFF and then ON again.
3.Make sure the power voltage is correct.
4.Make sure screws are secured firmly.
Is there voltage across the output
terminals T1, T2, and T3?
Turn the power OFF and then ON again.
Is overload causing the motor to
stall?
Reduce the load so the motor will run.
Are there any abnormalities in the
inverter?
See error descriptions to check wiring and correct if
necessary.
Is there a forward or reverse run
command ?
Has the analog frequency signal
been input?
1.Is analog frequency input signal wiring correct?
2.Is voltage of frequency input correct?
Is the operation mode setting
correct?
Operate through the digital keypad
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