Toshiba TOSVERT VF-A7 Instruction Manual page 245

(Continued from the preceding page)
Contents
Indication
(*1) Under-voltage
(main circuit)

(*1) Under-voltage
 (control circuit)
(*1)
Over-torque


Ground-fault

Auto-tuning

error
Inverter type

error
Sink/source

switching error
 Sequence error
 Encoder error
Speed error

(Over speed)
To much
potential

deviation
 Key error
 VI/II input error
Presence or absence of parameter trip can be selected.
(Note) Please contact us if you find any trips other than the above.
Expected causes
Input voltage (main circuit)
becomes insufficient in operation.
Momentary power failure occurs
because undervoltage continues
longer than under-voltage
detection time .
Input voltage (control circuit)
becomes insufficient in operation.
Momentary power failure occurs
because undervoltage continues
longer than under-voltage
detection time .
Load torque reaches over-torque
detection level in operation.
Output cable or motor falls into
ground-fault.
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).
Is control board (or drive board of
main circuit) replaced?
Sink/source switch of
input/output terminal is set wrong
(reversely switched on/off).
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
.
Disconnection of encoder circuit.
Something abnormal in encoder
(inverter)
Potential deviation exceeded the
 set value during position
control.
RUN or STOP key is depressed
for 5 seconds or more.
Key is faulty.
Breaking down of a wire for VI/II
input signal.
L-3
Countermeasures
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.
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.
Check the system if there is
something abnormal in it or not.
Check units and connections if there
is ground-fault or not.
When board has been replaced, input
 for .
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.)
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.
Check connection of encoder.
Connect encoder correctly.
Check connection of encoder.
Connect encoder correctly.
Check connection of encoder.
Increase the setting value of .
Adjust the parameters on position
control
Check operation panel.
Check VI/II input signal