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24.
TROUBLESHOOTING
Function Mame
CPU error
Cunent
prevention
limn
stall
Ground Fault
During
accele-
ration
Dumg
slant
8P-d
opera-
t i n
-
con-
-
During
decele-
ration
Fan failure
Option alarm
Descrlptlon
ll
the
cycle of
the
CPU is
not
completed within the
set
time,
rhe
selfdiagnostics interprets MIS
as an
error and shuts off
M r t e r
output.
If
current exc%eding
150% ('4)
o f
the rated inverter cumnt
Aows in
the motor, frequency
ramp
is hailed until load current
is reduced
to
prevent overcurrent shut-off the inverter.
If
the
load current is reduced to
150%, the
frequency
w i l l
iwrease
a m .
If
current
exceedng
150% ('4)
of the rated inverter current
fbws
m
(he
motor, f m q u e n c y
ramp is
hatted
u n t i l
load current
is reduced to
p m n l overcurrent shut-otf
of the
inverter.
If
the
! + a d
arrent is reduxd
to 150%,
the frequency wlll
imreese again.
If
the m t o r regeneration
energy increases
excmsively and
exceeds brake petlonsnce,
ai s
function stops
decreasing
of
the freqwncy to prevent overvoltage
s h u t - & .
Dederation
conthwrs after the regeneration energy has been reduced.
If current exceeding
1 5 0 % ('4) of
the rated inverter current
flows
in
the
motor, frequency decrease is halted until load
current is reduced
to
prevent overcurrent shut-&
d
the
inverler.
If
the load current
is
reduced
to 150%,
the
frequency
w i l l
decrease again.
If
a ground fauil current
has
flown due to a ground faun
occurring in the output (load)
side
of the inverter, this
function stops the inverter output.
A
ground faun occurring at
low ground residtraxe may activate
the
overcurrent protection
( 0 3
to
OC3).
(Provided for
the
4OOV
type
only.)
When the
Cooring
fan of
the
inverter has
stopped
due to a
foreign matter stuck in the fan or maiiunction, the inverter
output witl be
c8ased.
(1.5K
to
3.7K
2OOV. 2.N.
3.7K
4OOV)
Uskg
computec communication,
i i
times
of communication
retries are exceeded or check time interval
is
exceeded. the
inverter
outplt
is shut
on.
€.fPU
(CPU)
Indicating lamp
d
the monitor
mode
blinks
Indicating lamp
of the monitor
mode
blinks
E.&[
(OLT)
Alter the
stop.
1
Indicating lamp
of
the
mmRor
mode blinks.
I
E. Cf
(OF)
E,fRn
(FAN)
E
m
(OPT)
-
108-
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