Toshiba TOSVERT VF-P7 Instruction Manual page 240

(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