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24. TROUBLESHOOTING
If a fault
occurs
and the inverter fails
to
operate properly,
locate
the cause of the fault and take
proper corrective action by referring to the troubleshooting
below.
If the corresponding information
is not found in the table, the inverter has problem, or the component parts are damaged, contact
the nearest service representative.
24.1
Inspection
by the Display
on
the Parameter
Unit
In response to the Occurrence of a fauk, the display unit of the inverter automatically displays the
code of the detected fault.
Err:
Error
O C 1 :
Overcurrent during
acceleration
error
Reset
signal is
ON.
PU is
1x)t
connected
to
the
inverter correctly.
High input votlage
(approx. 260 VAC
520
VAG)
Faulty Internal circuit
CPU run-away
OC2: Overcurrent during
constant speed
operation
Overcurrent
OC3: Overcurrent during
deceleration
constant speed
DC overvoltage in
main circuit
OV3: Ovecvdlage during
deceleration
C h d I
Review the
I
Reset
t h e
inverter
I
con8ctivo action
operation method.
.
Is
wiring
at
t h e
reset terminal
correct?
Is
connector
secured correctly?
Is
i n p u t voltage
correct?
(page 48).
Turn
OFF
the reset
Correct the
Slgnal.
Use correct
input
connection.
Change the Inverter
voltage.
Is
acceleration
too
Extend acceleration
fast?
circuited or
grounded?
suddenly?
circuited
or
grounded?
fast?
circuited or application timing.
grounded?
*
Is mechanical
brake
applied
too
eady?
Is
acceleration
too
Extend acceleration
fast?
time.
Is
load changed
Eliminate sudden
suddenly?
load change.
IS
output Short-
tune.
Was
load changed
Eliminate sudden
0
IS
Output short-
load change.
.
Is
deceleration
too
Is
output short-
Extend deceleration
Check the brake
time.
Is
deceleration
too
Extend deceleration
fast?
time. (aqust
deceleration
time
compensating for
load
GD')
Reduce
braking frequency.
-
103
-
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