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
OC1:
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
ChdI
Review the
I
Reset
the
inverter
I
con8ctivo
action
operation
method.
.
Is
wiring
at
the
reset terminal
correct?
Is
connector
secured correctly?
Is
input
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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