GE Fuji Electric AF-300 MICRO-SAVER II User Manual

8-2
TROUBLESHOOTING
If the function of the Drive is lost by a failure or if an abnormal condition has occurred, refer to the following diagnosis
for its probable cause.
If the cause does not fall under the following explanation, or if the Drive is damaged, please contact GE Fuji Technical
Services for assistance.
( 1 ) Overcurrent
Overcurrent Overcurrent
during during Overcurrent at
acceleration deceleration constant speed
No
No
O C 1
O C 2
O C 3
Is motor circuit (U,V, W) of motor shorted or grounded?
Is the load too large?
No
No
Repair
short-circuit
and/or
grounding.
Is the
deceleration
time setting
too short for
the load?
Is the torque
boost setting
correct?
Does the load
change
suddenly?
Can the
deceleration
time be
increased?
Increase the
setting time.
Yes
Yes
Yes
Increase the
setting time.
No
No
Is the
acceleration
time setting too
short for the
load?
Can the
acceleration
time be
increased?
Yes
Yes
Yes
Reduce the
load fluctua-
tion or use a
Drive with
higher
capacity.
Reduce the
load fluctua-
tion or use a
Drive with
higher
capacity.
Yes
No
No
Yes
No
No
Yes
Can the torque
boost setting
be reduced?
No
No
Reduce the
torque boost
setting
No
Review the system
application.
Contact GE Fuji
Electric.
There is a
possibility of
Drive failure
or a motor
noise problem.
Contact GE Fuji
Electric.
Reduce the
load
fluctuation
or use a Drive
with higher
capacity.
There is the
possibility of
failure in the
Drive or a
noise problem.
Contact GE
Fuji Electric
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.
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GE Fuji Electric AF-300 MICRO-SAVER II Specifications

General

Input Current	Varies by model
Output Current	Varies by model
Power Rating	Varies by model
Protection Features	Overvoltage, undervoltage
Operating Temperature	0 to 40°C
Storage Temperature	-20 to 65°C
Dimensions	Varies by model
Weight	Varies by model
Humidity	5 to 95% (non-condensing)