Fuji Electric FVR-C11S-7EN Series - Page 74

7-9 7 Troubleshootin
g
FVR-C11S-EN
7
2) When motor rotates but the speed does not chan
g
e.
Motor rotates but speed
does not chan
g
e.
Chan
g
e the
settin
g
.
Yes
Maximum frequenc
y
set-
tin
g
too low?
No
Yes
Upper/lower frequenc
y
limiter activatin
g
?
No
Which frequenc
y
settin
g
method
is in use:
built-in POT (VR),
ke
y
pad panel,
analo
g
si
g
nal,
or multistep
frequenc
y
?
Built-in POT
(
VR
)
Does speed chan
g
e when
freq. settin
g
POT(VR)
turned
clockwise or counter
clockwise?
Yes
No
Yes
No
Ke
y
pad panel operation
Does the speed chan
g
e
when UP or DOWN ke
y
depressed?
No
Analo
g
si
g
nal
Can the frequenc
y
settin
g
si
g
nal
(0 to +10V, 4 to 20mA)
be chan
g
ed?
Yes
Multistep
fre
q
uenc
y
No
External wirin
g
connections between
control terminals
X1,X2,X3 - P24/CM
connected correctl
y
?
No
Remed
y
wirin
g
error.
No
External wirin
g
connections between
control terminals
13,12,C1 - 11 correct?
Yes Yes
Frequencies for each
multistep selectin
g
frequenc
y
different?
No
Chan
g
e the settin
g
frequenc
y
.
Yes
Settin
g
of
acceleration/
deceleration time
excessivel
y
lon
g
?
No
Probabl
y
fault
y
inverter or error
because of noise, etc.
Contact Fuji Electric.
Replace fault
y
frequenc
y
settin
g
POT(VR) or si
g
nal
converter as
appropriate.
Yes
Chan
g
e settin
g
to
correct acceleration/
deceleration time for load.