Toshiba TOSVERT VF-AS1 Series, Инструкция по эксплуатации

Страница: 320 / 334

E6581442
M-2
13
(Continued)
Error
code
Description Possible causes Remedies

Inverter
overload
•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.
•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.

Motor overload
•The V/f parameter is improperly
set.
•The motor is locked up.
•Low-speed operation is performed
continuously.
•An excessive load is applied to the
motor during operation.
•Check the V/f parameter setting.
•Check the load (operated machine).
•Check the

setting and adjust

according to the sustainable overload in the motor
low-speed range.
•Reduce the DC braking amount

and the
DC braking time

.

Dynamic
braking resistor
overload
•Rapid deceleration is operated.
•Dynamic braking is too large.
•Increase the deceleration time

.
•Increase the capacity of dynamic braking resistor
(wattage) and adjust PBR capacity parameter

.

Overvoltage
during
acceleration
•The input voltage fluctuates abnormally.
(1)The power supply has a capacity
of 500kVA or more.
(2)A power factor improvement
capacitor is opened and closed.
(3)A system using a thyrister is
connected to the same power
distribution line.
•A restart signal is input to the
rotating motor after a momentary
stop, etc.
•Insert a suitable input reactor.
•Use

(Auto-restart) and

(Regenerative
power ride-though control).

Overvoltage
during
deceleration
•The deceleration time

is too
short (regenerative energy is too
large).
•The dynamic braking resistor has
a considerably large resistance.
•

(Dynamic braking resistor) is OFF.
Overvoltage limit operation

is OFF.
•The input voltage fluctuates abnormally.
(1)The power supply has a capacity
of 500kVA or more.
(2)A power factor improvement
capacitor is opened and closed.
(3)A system using a thyrister is
connected to the same power
distribution line.
•Increase the deceleration time

.
•Install a dynamic braking resistor.
•Decrease dynamic braking resistance. (Also reset
the

.)
•Set dynamic braking mode parameter

properly.
•Set overvoltage limit operation

properly.
•Insert a suitable input reactor.

Overvoltage
during fixed
speed operation
•The input voltage fluctuates
abnormally.
(1)The power supply has a capacity
of 500kVA or more.
(2)A power factor improvement
capacitor is opened and closed.
(3)A system using a thyrister is
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.
•Insert a suitable input reactor.
•Install a dynamic braking resistor.
*

Overtorque
•Overtorque reaches to a detection
level during operation.
•Stall prevention operation was
performed continuously for a
length of time longer than that set
with

.
•Check system error.
•Check whether the motor is overloaded or the
brake is engaged.
*

Low current
•The output current decreased to a
low-current detection level during
operation.
•Check the suitable detection level for the system
(

).
•Contact your Toshiba distributor if the setting is
correct.
*

Voltage drop in
main circuit
•The input voltage (in the main
circuit) is too low.
•Momentary power failure occurs
because undervoltage continues
longer than undervoltage detection
time

.
•Check the input voltage.
•To cope with a momentary stop due to
undervoltage, enable

(Regenerative power
ride-through control),

(auto-restart control),
and

(Undervoltage detection time).
*Presence or absence of parameter trip can be selected.