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7 Troubleshooting
7-1 In case of tripping
In the event the drive tripping, diagnose by the help of the alarm display as shown below.
(1) Overcurrent (OC)
Overcurrent dur-
ing accelera
tion
OC1
Overcurrent dur
ing
deceleration OC2
Overcurrent while run-
ning at constant speed
OC3
Remove short-circuit
or ground.
Reduce load or expand
drive capacity.
Torque boost amount
correct?
Has load changed
suddenly?
Deceleration time
setting too short
compared with load?
Faulty drive or error
because of noise. Con-
tact GE Fuji.
Reduce torque
boost amount.
Acceleration time
setting too short
compared with load?
No
No
No
yes
yes
yes
yes
yes
yes
yes
yes
yes
Can the deceleration
time setting be pro-
longed?
Prolong time setting.
Prolong time set-
ting.
Can the acceleration
time setting be pro-
longed?
Braking method
needs investigation.
Consult with GE Fuji.
Reduce load or ex-
pand drive capacity.
Suppress load fluctuation
or expand drive capacity.
Are the motor connecting terminal (U,V,W) short-circuited or
grounded?
No
No
No
No
No
No
No
No
Load excessive?
Can torque boost
amount be re-
duced?
No