B&C Technologies SA Series Industrial - Manual (Page 67)

TROUBLE SHOOTING
7-7
Possible Causes What to Check and Suggested Measures
3. The automatic deceleration
was active.
Check the data of function code H69.
→ 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 the 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 did not make the
motor restart even if the
power recovered after an
instantaneous power
failure.
Check if an under voltage trip occurs.
→ Change the data of function code F14 to 4 or 5.
2. The run command stayed
off even after the power
recovered.
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.
Problems with inverter settings
1. If the 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 by referring to the
function code tables.
→ Stop the motor then change the data of the function cades.
2. The data of the function
codes is protected.
Check the data of function code F00
→ Disable data protection of function codes.