10-7
10.3 General Troubleshooting
Status
Check
Possible Solution
Motor runs in
wrong
direction
Check inverter output wiring.
Wiring must match U, V, and W terminals of the
motor.
Check control terminal wiring.
Check for correct wiring.
Unable to
regulate
motor speed.
Check control terminal wiring.
Check for correct wiring.
Check operation mode.
Check the Frequency
Source set in parameters 00-05/00-06.
Excessive load.
Reduce the load.
Motor
running
speed too
high or too
low
Check motor data (poles,
voltage…).
Confirm the motor specifications.
Check gear ratio.
Confirm gear ratio.
Check maximum output frequency
00-12/01-02.
Confirm maximum output frequency
Motor speed
unstable
Excessive load.
Reduce the load.
Motor load fluctuates.
1. Minimize the variation of the load.
2. Consider increasing inverter size and the
motor.
Input voltage unstable.
1. Consider adding an AC reactor at the input
power side when using single-phase power.
2. Check wiring when using three-phase power.
Motor does
not run
Check input power connected and
input terminals.
Check if charging indicator is lit.
1. Turn input power on.
2. Cycle input power.
3. Input voltage not correct.
4. Input wiring not fastened
Check output voltage across
output terminals T1, T2, and T3.
Cycle input power.
Check motor overload settings.
Reduce motor load.
Are there any abnormalities in the
inverter?
Check wiring and correct if necessary.
Check forward or reverse run
command.
Check analog frequency
reference signal.
Correct analog input signal.
Check operation mode setting
00-03.
Run inverter through via the keypad
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