Toshiba Tosvert VF-AS1 Instruction Manual page 324

(Continued)




Note: Please contact us if you find any trips other than the above.
[Alarm] The following are messages only. No trip is developed.
Error
code
 ST signal OFF



 Retry




/
13
 DC braking




(Continued overleaf)
•Motor control CPU is defective.
•The drive circuit board in the
Internal circuit inverter was damaged.
error •Power device is defective.
•Using braking function in not
=,,,, mode
•The control voltage between +SU
Control power and CC terminals is too low.
backup •Control power is not supplied
undervoltage through +SU and CC terminals.
•The parameter  is not set
error
correctly.
Step-out (for •The motor shaft is locked.
PM motors •One output phase is open.
only) •An impact load is applied.
Power removal •Error of power removal circuit
error
Problem Possible causes
•ST terminal (terminal to which the
ST function is assigned) is in
open-circuit.
PWR signal •PWR terminal is in open-circuit.
OFF
•The control voltage between +SU
and CC terminals is too low.
•Control power is not supplied
Control power through +SU and CC terminals.
•The parameter  is not set
backup
undervoltage correctly.
•The supply voltage between R, S
Undervoltage in and T is under voltage.
main circuit •Trouble of rush current restraint
circuit or DC circuit fuse.
•The inverter is in the process of
retry.
•A momentary stop occurred.
•The frequency setting signals at
Point setting
points 1 and 2 are set too close to
alarm
each other.
Key failure •The same key is input continuously
alarm more than 20 seconds.
•This message is displayed when
pressing the STOP key while an
Clear enabling
error code is displayed.
indication
•Input terminal RES signal is ON
during trip display.
Emergency stop •The operation panel is used to
enabling stop the operation in automatic
indication control or remote control mode.
Setting error •An error is found in a setting when
alarm data is reading or writing.
An error code
and data are
displayed
alternately twice
each.
•DC braking in process
•Motor shaft fixing control is in
Shaft fixing in
process.
control
•The digit number of the item
displayed, e.g., frequency, is in
Panel indication excess of the specified digit
overflow number.
(Number of overflowing digits is
indicated.)
•Contact your Toshiba distributor.
•If the braking function is used, operate a motor in
=,,,, mode
•Check whether the voltage between +SU and CC
terminals is DC20V or more.
•Set  to 0 if a control power backup device
is not connected to +SU and CC terminals.
To reset the inverter that has been tripped
because of this error, turn it off and then back on.
•Unlock the motor shaft.
•Check the interconnect cables between the
inverter and the motor.
•Contact your Toshiba distributor.
•Check SW1 select
•Close ST-CC circuit (Sink logic)
•Close ST-P24/PLC circuit (Source logic)
•Close PWR-P24 circuit.
•Check whether the voltage between +SU and CC
terminals is DC20V or more.
•Set  to  if a control power backup device
is not connected to +SU and CC terminals.
In the event of a  error, the inverter will not
be reset automatically even if the control voltage
between +SU and CC terminals returns to its
normal level. To reset the inverter, turn it off and
then back it on.
•Measure the main circuit supply voltage.
If the voltage is at a normal level, the inverter
requires repairing.
•Contact your Toshiba distributor.
•The inverter is normal if it restarts after several
tens of seconds. The inverter restarts
automatically. Be careful of the machine because
it may suddenly restart.
•Set the frequency setting signals at points 1 and 2
apart from each other.
•Check the operation panel.
•Press the STOP key again to clear the trip.
•Turn off the input terminal RES signal.
•Press the STOP key for an emergency stop. To
cancel the emergency stop, press any other key.
•Check whether the setting is made correctly.
•The message goes off in several tens of seconds
if no problem occurs. [Note]
•If the message disappears by stop command (ST
(terminal to which the ST function is assigned)-CC
open), it is normal.
•For indication of frequency, set multiplying rate
() lower. (Parameter setting that results in
overflow is of course valid.)
M-6
E6581442
Remedies