Fuji Electric FRN0.75C1*-2 Series User Manual

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
(function 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 an instantaneous 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
r
instantaneous power failure (function 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.
6.2.2 Problems with inverter settings
[ 1 ] Data of function codes cannot be changed
Possible Causes What to Check and Suggested Measures
(1) An attempt was made to
change function code data
that cannot be changed
when the inverter is
running.
Check if the inverter is running with Menu #3 "Drive monitoring"
using the keypad and then confirm whether the data of the
function codes can be changed when the motor is running b
y
referring to the function code tables.
 Stop the motor then change the data of the function codes.
(2) The data of the function
codes is protected.
Check the data of function code F00 (Data protection).
 Change the setting of F00 from "1" to "0."

Fuji Electric FRN0.75C1*-2 Series Specifications

General

Brand	Fuji Electric
Model	FRN0.75C1*-2 Series
Category	Inverter
Language	English