TECO N3 Series - 22.1 General Troubleshooting

N3 Drive Operations Manual
Troubleshooting; General 90
22.1 General Troubleshooting
Fault
Status
Check That:
Remedy
Motor will
not run
there is power applied to terminals L1(L), L2,
and L3(N) (L1(L) and L3(N) for single phase
units)
· Apply power
· Turn power OFF and then ON again.
· Make sure the input voltage is correct.
· Make sure the power input terminal screws
are firmly secure.
the Charge indicator is lit.
there is voltage on output terminals T1, T2, and
T3 to the motor.
Turn the power OFF and then ON again.
there is not an overload causing the motor to stall
Reduce the load so the motor will run.
there are not any inverter wiring problems.
Correct wiring or any input connection
p problems.
there is a forward or reverse run command.
there is a Run command.
· Make sure that the analog frequency input
signal wiring is correct.
· Make sure that the signal input voltage
value is correct.
the operational mode is correct.
Operate the inverter through the digital
keypad.
Motor runs
in wrong
direction
the wiring for output terminals T1, T2, and T3 is
correct.
The wiring must match the U, V, and W
terminals of the motor.
the wiring for the forward and reverse signals is
correct.
Correct wiring if necessary.
Motor
speed can
not be
regulated
the signal wiring for the analog input frequency is
correct.
Correct wiring if necessary.
the setting of operation mode is correct..
Check the operation mode on the keypad.
the load on the motor is not too excessive.
Reduce the load.
Motor
speed too
high or too
low
the specifications for the motor (poles,
voltage etc…) are correct.
Confirm the motor specifications.
the gear ratio is correct.
Confirm the gear ratio.
the setting of the maximum output frequency
is correct.
Confirm the maximum output frequency.
Motor
speed
varies
erratically
the load is too excessive.
Reduce the load.
the load does not vary excessively.
· Minimize the variation of the load.
· Increase capacities of the inverter and the
motor.
the input power is not erratic or there is a phase
loss occurring.
· Add an AC reactor at the power input side if
using single-phase power.
· Check wiring if using three-phase power.