Trip Causes/Warnings And Remedies; Before Making A Service Call - Toshiba TOSVERT VF-AS1 Instruction Manual

13. Before making a service call

13.1

Trip causes/warnings and remedies

When a problem arises, diagnose it in accordance with the following table.
If it is found that replacement of parts is required or the problem cannot be solved by any remedy described in the
table, contact your supplier.
[Trip information]
Error
Description
code
Overcurrent

during
*
acceleration
Overcurrent

during
*
deceleration
Overcurrent

during fixed
*
speed
[Note] , ,
 originate from
causes other than those
mentioned above.
U-phase arm
*
short-circuit
V-phase arm
*
short-circuit
W-phase arm
*
short-circuit
Loaded side

overcurrent at
start time
Dynamic braking
element

overcurrent
(110kW or
larger)

Overheating
Thermal trip
stop command

from external
device
* In the event one of the error codes  to  and  to  appears, in which case a main
circuit component has most probably failed, the only way to reset the inverter is to turn power off and back on.
(Continued overleaf)
Possible causes
•The acceleration time  is too short.
•The V/f setting is improper.
•A restart signal is input to the
rotating motor after a momentary
stop, etc.
•A special motor (e.g. motor with a
small impedance) is used.
•Manual torque boost value () is large.
•The deceleration time  is too
short. (in deceleration)
•The load fluctuates abruptly.
•The load is in an abnormal
condition.
•A main circuit elements is defective.
•Overheat protection is activated.
•A main circuit elements is defective
(U-phase).
•A main circuit elements is defective
(V-phase).
•A main circuit elements is defective
(W-phase).
•The insulation of the output main
circuit or motor is defective.
•The motor has too small
impedance.
•The drive circuit board in the
inverter was damaged.
•PB-PC/+ circuit is shorted.
•A resistor with resistance smaller
than the minimum allowable
resistance is connected.
•Parameter  was set to  or 
without connecting regenerative
brake or with wire disconnected
(with dynamic braking).
•The cooling fan does not rotate.
•The ambient temperature is too
high.
•The vent is blocked up.
•A heat generating device is
installed close to the inverter.
•The thermistor in the unit is
disconnected.
•An input signal is impressed at
control input terminal PTG for
optional add-on cards.
•A thermal trip command (input
terminal function:  or ) is
issued by an external control
device.
M-1
- Trip information and remedies
Remedies
•Increase the acceleration time .
•Check the V/f parameter setting.
•Use (Auto-restart) and  (Regenerative
power ride-though control).
•Increase the carrier frequency .
•Decrease  setting value.
•Decrease  (stall prevention level) to 130
as a guide.
•Increase  (carrier frequency) setting value if it
is set at lower value (2kHz or less).
•Increase the deceleration time .
•Reduce the load fluctuation.
•Check the load (operated machine).
•Make a service call.
•Check operation of cooling fan.
•Check cooling fan control mode parameter
.
•Make a service call.
•Make a service call.
•Make a service call.
•Check the cables and wires for defective
insulation.
•Selection of short circuit detection at starting
parameter .
•If this error message appears when a motor is not
connected to the inverter, the inverter itself may
be faulty, so make a service call.
•Check the impedance wiring for the resistor, etc.
•Make a service call.
•Check if regenerative brake is connected.
•If regenerative brake is not necessary, set
parameter  to .
•Restart the operation by resetting the inverter
after it has cooled down enough.
•The fan requires replacement if it does not rotate
during operation.
•Secure sufficient space around the inverter.
•Do not place any heat generating device near the
inverter.
•Make a service call.
•The motor is overheated, so check whether the
current flowing into the motor exceeds the rated
current.
E6581528
13