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10-17
10.3
General Troubleshooting
Status
Checking point
Remedy
Motor runs in
wrong
direction
Motor wiring correct to inverter output
terminals?
Inverter must be connected to U, V, and W terminal of
the motor.
Control wiring correct for forward and
reverse commands?
Check wiring.
The motor
speed cannot
be regulated.
Wiring for the analog frequency
reference inputs correct?
Check wiring.
Operation mode correct?
Check the Frequency source parameters 00-05/00-06.
Is the load too excessive?
Reduce the load.
Motor speed
too high or too
low
Check the motor specifications (FLA,
voltage, max speed
…) correct?
Check motor nameplate.
Is the gear ratio correct?
Confirm the gear ratio.
Is the maximum frequency setting
correct?
Check maximum frequency settings.
Motor speed
unstable
Is the motor load too high?
Reduce motor load.
Motor load unstable?
(1) Stabilize motor load.
(2) Consider increasing inverter and motor size.
Is the input power unstable or is there
a phase loss condition?
(1) Consider adding an AC reactor at the power input
side.
(2) Check wiring when using three-phase power.
Motor does
not run
Input power connected to the correct
L1(L), L2, and L3(N) terminals?
Charging indicator lit?
(1) Power turned ON?
(2) Cycle power to the inverter.
(3) Make sure the input voltage is correct.
(4) Make sure input terminal screws are fastened.
Is there voltage across the output
terminals T1, T2, and T3?
Cycle power to the inverter.
Is motor load causing the motor to
stall?
Reduce the motor load.
Are there any errors shown on the
inverter keypad?
See error descriptions and check wiring, correct if
necessary.
Forward or reverse run command
active?
Check analog frequency reference
signal?
(1) Analog frequency input signal wired correctly?
(2) Check analog input voltage of frequency input.
Operation mode setting correct?
Check if inverter operation mode 00-02/00-03.