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8-3
O U
The power
supply
voltage
should be
corrected.
Yes
Yes
No
Will fault take place when the load is removed suddenly?
Is the power supply voltage within the specified limits?
No
Was DC bus voltage above alarm level when alarm occurred?
No
Yes
Can the deceleration time be
increased?
Review the control and system application again. Contact GE Fuji
Electric.
Is a braking resistor installed and activated?
No
Increase
the timed
setting
Decrease until the
failure does not
occur.
No
Yes
No
Yes
No
Yes
Can the acceleration time be
increased?
Can the load inertia be decreased?
No
Yes
Yes
Investigate braking
resistor for correct
connection rating and
control settings.
Does action take place after
rapid acceleration is completed?
Yes
( 2 ) Overvoltage
Possible Drive
failure or
malfunction due
to electrical
noise. Contact
GE Fuji Electric.