6-7
Possible Causes What to Check and Suggested Measures
(3) The automatic
deceleration was active.
Check the data of function code H69 (Automatic deceleration
(mode selection)).
Consider the use of a braking resistor.
Increase the deceleration time (F08 and E11).
(4) Overload Measure the output current.
Lighten the load.
(5) Torque generated by the
motor was insufficient.
Check that the motor starts running if the value of the torque
boost (F09) is increased.
Increase the value of the torque boost (F09).
(6) An external frequency
command device is being
used.
Check that there is no noise in the external signal wires.
Isolate the control signal wires from the main circuit wires as
far as possible.
Use shielded wire or twisted wire for the control signal wires.
[ 7 ] Even if the power recovers after a momentary power failure, the motor does not restart.
Possible Causes What to Check and Suggested Measures
(1) The setting of function
code F14 is either 0 or 1.
Check if an undervoltage trip occurs.
Change the data of function code F14 (Restart mode afte
momentary power failure (mode selection)) to 4 or 5.
(2) The run command stayed
off even after power has
been restored.
Check the input signal with Menu #4 "I/O checking" using the
keypad.
Check the power recovery sequence with an external circuit.
If necessary, consider the use of a relay that can keep the
run command on.
[ 8 ] The inverter does not run as expected
Possible Causes What to Check and Suggested Measures
Check that all function codes are correctly configured.
Correct the configuration of the function codes.
(1) Wrong configuration
of function codes
Make a note of function code data currently configured and initialize
all function code data (H03).
After initialization, reconfigure the necessary function codes one
by one, checking the running status of the inverter.
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