Fuji Electric FVR-C11S-7EN Series - Troubleshooting; 7-1 In case of tripping

7-1 7 Troubleshootin
g
FVR-C11S-EN
7
7 Troubleshootin
g
1) Overcurrent (OC)
7-1 In case of
trippin
g
In the event the inverter trippin
g
, dia
g
nose b
y
the help of the alarm dis-
pla
y
as shown below.
Overcurrent
durin
g
acceleration
OC1
Overcurrent
durin
g
deceleration
OC2
Overcurrent
while runnin
g
at
constant speed
OC3
Are the motor connectin
g
terminal (U,V,W)
short-circuited or
g
rounded?
Yes
Remove
short-circuit
or
g
round.
No
No
No
Load excessive?
Yes
Reduce load
or expand
inverter
capacit
y
.
No No No
No
Can torque
boost amount be
reduced?
No
Torque
boost amount
correct?
Deceleration
time settin
g
too short com-
pared
with load?
No
Fault
y
invert-
er or error
’because of
noise.
Contact
Fuji Electric.
Yes
Yes Yes
Has load chan
g
ed
suddenl
y
?
No
Reduce
torque boost
amount.
Acceleration
time settin
g
too
short compared
with load?
No
Yes
Prolon
g
time settin
g
.
Yes
Can the
acceleration
time settin
g
be
prolon
g
ed?
Can the
deceleration
time settin
g
be
prolon
g
ed?
Yes
Prolon
g
time settin
g
.
No No
Reduce load or
expand inverter
capacit
y
.
Brakin
g
method
needs investi
g
a-
tion. Consult with
Fuji Electric.
Suppress load
fluctuation or
expand inverter
capacit
y
.
Yes