L-3
(Continued from the preceding page)
Indication
Contents
Expected causes
Countermeasures
(*1)
Under-voltage
(main circuit)
･
Input voltage (main circuit)
becomes insufficient in operation.
･
Momentary power failure occurs
because undervoltage continues
longer than under-voltage
detection time
.
･
Check input voltage.
･
If undervoltage is detected, set
(regenerative power ride-
through control),
(auto-restart)
and
(under-voltage detection
time) as countermeasures against
future momentary power failure.
(*1)
Under-voltage
(control circuit)
･
Input voltage (control circuit)
becomes insufficient in operation.
･
Momentary power failure occurs
because undervoltage continues
longer than under-voltage
detection time
.
･
Check input voltage.
･
If undervoltage is detected, set
(regenerative power ride-
through control),
(auto-restart)
and
(under-voltage detection
time) as countermeasures against
future momentary power failure.
(*1)
Over-torque
･
Load torque reaches over-torque
detection level in operation.
･
Check the system if there is
something abnormal in it or not.
Ground-fault
･
Output cable or motor falls into
ground-fault.
･
Check units and connections if there
is ground-fault or not.
Auto-tuning
error
･
Check settings of
to
parameters for motor.
･
Motor whose capacity is smaller by two or more ranks than that of inverter
is used, isn't it?
･
Extremely think cable is used as inverter output cable, isn't it?
･
Motor is running, isn't it?
･
Motor other than three-phase inductive type is used, isn't it?
･
If
error occurs as power is turned on, set motor type parameter as
=
(others).
Inverter type
error
･
Is control board (or drive board of
main circuit) replaced?
･
When board has been replaced, input
for
.
Sink/source
switching error
･
Sink/source switch of
input/output terminal is set wrong
(reversely switched on/off).
･
Check connections and set proper
logic.
･
After making sure that sequence is
normal, proceed in operation.
･
If the same error does not occur when
the power is turned on again, the
system has recovered normal status.
(Check control terminals and
sink/source switches including those
of add-on options.)
Sequence error
･
The signal from a system is not
inputted into input terminals.
･
The input terminal function (
or
) is not set up.
･
For not using the system-
supporting sequence
function, it is set up except 0.0 at
.
･
Please check if the sequence is
normal or not.
･
Please set
or
as the input
terminal to use.
･
Please set up 0.0, when you do not
use system-supporting sequence.
Encoder error
･
Disconnection of encoder circuit.
･
Check connection of encoder.
Connect encoder correctly.
Speed error
(Over speed)
･
Something abnormal in encoder
(inverter)
･
Check connection of encoder.
Connect encoder correctly.
To much
potential
deviation
･
Potential deviation exceeded the
set value during position
control.
･
Check connection of encoder.
･
Increase the setting value of
.
･
Adjust the parameters on position
control
Key error
･
RUN or STOP key is depressed
for 5 seconds or more.
･
Key is faulty.
･
Check operation panel.
VI/II input error
･
Breaking down of a wire for VI/II
input signal.
･
Check VI/II input signal
Presence or absence of parameter trip can be selected.
(Note) Please contact us if you find any trips other than the above.
