Before Making A Service Call; Trip Causes/Warnings And Remedies - 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
(200V-55kW or
larger, 400V-
90kW or larger)
Overheating
Thermal trip
stop command
from external
device
Inverter
overload
* In the event one of the error codes
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 (
•The deceleration time
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.
•PB-PC/+ circuit is shorted.
•A resistor with resistance smaller
than the minimum allowable
resistance is connected.
•Parameter was set to
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
issued by an external control
device.
•Rapid acceleration is operated.
•The DC braking amount is too
large.
•The V/f setting is improper.
•A restart signal is input to the
rotating motor after a momentary
stop, etc.
•The load is too large.
to
M-1
- Trip information and remedies
•Increase the acceleration time
•Check the V/f parameter setting.
•Use (Auto-restart) and
power ride-though control).
•Increase the carrier frequency
•Decrease setting value.
• Decrease
) is large. as a guide.
• Increase (carrier frequency) setting value if it
is set at lower value (2kHz or less).
is too •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 .
•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
or
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.
) is
•Increase the acceleration time
•Reduce the DC braking amount
DC braking time
•Check the V/f parameter setting.
•Use (Auto-restart) and
power ride-though control).
•Use an inverter with a larger rating.
and to appears, in which case a main circuit
E6581301
Remedies
.
(Regenerative
.
(stall prevention level) to 130
.
.
.
and the
.
(Regenerative
13