Toshiba TOSVERT VF-AS1 Instruction Manual page 6

Operations
• Do not touch inverter terminals when electrical power is applied to the inverter even if the
motor is stopped.
Touching the inverter terminals while power is connected to it may result in electric shock.
• Do not touch switches when thands are wet and do not try to clean the inverter with a
damp cloth.
Such practices may result in electric shock.
• Do not go near the motor in alarm-stop status when the retry function is selected.
The motor may suddenly restart and that could result in injury.
Take measures for safety, e.g. attaching a cover to the motor, against accidents when the
motor unexpectedly restarts.
Prohibited
• The inverter is tuned automatically (auto-tuning
for the first time after setup.
During auto-tuning, which takes several seconds, the motor is energized, although it is
standing still. Noise may be produced by the motor during auto-tuning, which, however,
does not indicate that something is wrong with the inverter or the motor.
• Do not set the stall prevention level (
If the stall prevention level parameter (
motor, the stall preventive function will always be active and increase the frequency when it
judges that regenerative braking is taking place.
Do not set the stall prevention level parameter (
conditions.
• Do not turn on the power before attaching the front cover.
When storing inside the cabinet and using with the front cover removed, always close the
cabinet doors first and then turn power on. If the power is turned on with the front cover or
the cabinet doors open, it may result in electric shock.
• Make sure that operation signals are off before resetting the inverter after malfunction.
Mandatory
If the inverter is reset before turning off the operating signal, the motor may restart
suddenly causing injury.
• Provide cranes and hoists with sufficient circuit protection such as mechanical braking.
Without sufficient circuit protection, the resulting insufficient motor torque during tuning
could create a risk of machine stalling/falling.
• Observe all permissible operating ranges of motors and mechanical equipment. (Refer to
the motor's instruction manual)
Not observing these ranges may result in injury.
Mandatory
When sequence for restart after a momentary failure is selected
• Stand clear of motors and mechanical equipment.
If the motor stops due to a momentary power failure, the equipment will start suddenly
when power is restored.
This could result in unexpected injury.
• Attach cautions about sudden restart after a momentary power failure on inverters, motors
Mandatory
and equipment for prevention of accidents in advance.
When retry function is selected
• Stand clear of motors and equipment.
If the motor and equipment stop when the alarm is given, selection of the retry function will
restart them suddenly after the specified time has elapsed and alarm condition has
disappeared. This could result in unexpected injury.
Mandatory
• To prevent accidents, stick caution notices that the inverter has a retry function to the
inverter, the motor and the machine.
Warning
= ,
) extremely low.
) is set at or below the no-load current of the
) below 30% under normal use
Caution
Caution
Caution
5
) when the inverter is started
E6581528
I
Reference
3.
3.
3.
6.22
6.33.1
3.
10.
3.
6.22
Reference
3.
Reference
5.18.1
Reference
6.14.1