TECO JNTHBCBA0001BEAU - General Troubleshooting

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5.2 General troubleshooting
Status Checking point Remedy
Is power applied to L1(L), L2, and L3(N)
terminals (is the charging indicator lit)?
‧Is the power applied?
‧Turn the power OFF and then ON
again.
‧Make sure the power voltage is
correct.
‧Make sure screws are secured firmly.
Are there voltage across the output terminal
T1, T2, and T3?
‧Turn the power OFF and then ON
again.
Is overload causing the motor blocked?
‧Reduce the load to let the motor
running.
Are there any abnormalities in the inverter?
Is forward or reverse running command
issued?
‧See error descriptions to check wiring
and correct if necessary.
Has analog frequency signal been input?
‧ Is analog frequency input signal
wiring correct?
‧Is voltage of frequency input correct?
Motor can
not run
Is operation mode setting correct?
‧Operate operations through the
digital panel.
Are wiring for output terminals T1, T2, and T3
correct?
‧Wiring must match U, V, and W
terminals of the motor.
Motor runs
inversely
Are wiring for forward and reverse signals
correct?
‧Check wiring are correct if necessary.
Are wiring for analog frequency inputs
correct?
‧Check wiring are correct if necessary.
Is the setting of operation mode correct?
‧Check the operation mode of the
operator.
The motor
speed can
not be
regulated.
Is the load too heavy? ‧Reduce the load.
Are specifications of the motor (poles,
voltage…) correct?
‧Confirm the motor’s specifications.
Is the gear ratio correct? ‧Confirm the gear ratio.
Motor
running
speed too
high or too
low
Is the setting of the highest output
frequency correct?
‧Confirm the highest output frequency.
Is the load too heavy? ‧Reduce the load.
Does the load vary largely?
‧Minimize the variation of the load.
‧Increase capacities of the inverter
and the motor.
Motor
speed
varies
unusually
Is the input power lack of phase?
‧
A
dd an AC reactor at the power input
side if using single-phase power.
‧Check wiring if using three-phase
power.