Toshiba TOSVERT VF-AS1 Instruction Manual page 281

(Continued)
Error
code








 EEPROM error
 Initial read error •Some internal data is corrupted.
 Initial read error •Some internal data is corrupted.


13
 CPU fault

 Gate array fault •Main gate array is defective.


(Continued overleaf)
Description Possible causes
•The input voltage fluctuates
abnormally.
(1)The power supply has a capacity
of 500kVA or more.
(2)A power factor improvement
Overvoltage capacitor is opened and closed.
during fixed (3)A system using a thyrister is
speed operation connected to the same power
distribution line.
•The motor is in a regenerative
state because the load causes the
motor to run at a frequency higher
than the inverter output frequency.
•Rapid acceleration is operated.
•The DC braking amount is too
large.
Inverter •The V/f setting is improper.
overload •A restart signal is input to the
rotating motor after a momentary
stop, etc.
•The load is too large.
•The V/f parameter is improperly
set.
•The motor is locked up.
Motor overload •Low-speed operation is performed
continuously.
•An excessive load is applied to the
motor during operation.
•Rapid deceleration is operated.
Dynamic
•Dynamic braking is too large.
braking resistor
overload
Dynamic braking • PB-PC circuit is shorted.
element • A resistor with resistance smaller
overcurrent than the minimum allowable
(200V-55kW or resistance is connected.
larger, 400V-
90kW or larger)
•The cooling fan does not rotate.
•The ambient temperature is too
high.
•The vent is blocked up.
Overheating
•A heat generating device is
installed close to the inverter.
•The thermistor in the unit is
disconnected.
Thermal trip • An input signal is impressed at
stop command control input terminal PTG for
from external optional add-on cards.
device
•Inverter is stopped by panel
Emergency stop operation during automatic or
remote operation.
•A data writing error occurs.
Main unit RAM •The control RAM is defective.
fault
Main unit ROM •The control ROM is defective.
fault
•The control CPU is defective.
Interruption •An error arises during remote
communication operation.
fault
Output current •The main output current detector is
detector error defective.
•An optional device has failed.
Optional unit
(such as a communication device
fault
[add-on option])
•Insert a suitable input reactor.
•Install a dynamic braking resistor.
•Increase the acceleration time .
•Reduce the DC braking amount  and the
DC braking time .
•Check the V/f parameter setting.
•Use  (Auto-restart) and  (Regenerative
power ride-though control).
•Use an inverter with a larger rating.
•Check the V/f parameter setting.
•Check the load (operated machine).
•Adjust  to the overload that the motor can
withstand during operation in a low speed range.
• Reduce the DC braking amount  and the
DC braking time .
•Increase the deceleration time .
•Increase the capacity of dynamic braking resistor
(wattage) and adjust PBR capacity parameter
.
•Check the impedance wiring for the resistor, etc.
•Make a service call.
•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.
•Reset the inverter.
•Turn off the inverter, then turn it again. If it does not
recover from the error, make a service call.
•Make a service call.
•Make a service call.
•Make a service call.
•Make a service call.
•Make a service call.
•Check the remote control device, cables, etc.
•Make a service call.
•Make a service call.
•Check the connection of optional board(s).
•Refer to instructions of options concerned.
M-2
E6581301
Remedies