Toshiba TOSVERT VF-MB1 Instruction Manual page 6

 Do not attach equipment (such as noise filters or surge absorbers) that have built-in
capacitors to the output (motor side) terminals.
That could result in a fire.
Prohibited
 Operations
 Never touch the internal connector while the upper terminal cover of control panel is
opened.
There is a risk of shock because it carries a high voltage.
 Do not touch inverter terminals when electrical power is going 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 the hands are wet and do not try to clean the inverter with a
Prohibited
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.
 After replacing the terminal block cover, turn the input power on.
When installed inside a cabinet and using with the front cover removed, always close the
cabinet doors first and then turn power on. Turning on the power with the terminal block
cover or cabinet doors open 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
action
suddenly causing injury.
 Configuring settings on the setup menu incorrectly may break the inverter or lead to
malfunction.
 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.
 Do not set the stall prevention level () extremely low.
If the stall prevention level parameter () is set at or below the no-load current of
the motor, the stall preventive function will be always active and increase the frequency
Prohibited
when it judges that regenerative braking is taking place.
Do not set the stall prevention level parameter () below 30% under normal use
conditions.
 Use an inverter that conforms to the specifications of power supply and three-phase
induction motor being operated. If the inverter being used does not conform to those
specifications, not only will the three-phase induction motor not rotate correctly, but it may
cause serious accidents through overheating and fire.
Mandatory
 Current may leak through the inverter's input/output wires because of insufficient
action
electrostatic capacity on the motor with bad effects on peripheral equipment.
The leakage current's value is affected by the carrier frequency and the length of the
input/output wires. Test and adopt the following remedies against leak current.
Caution
Warning
Caution
5
E6581697
I
Reference
section
2.1
Reference
section
1.3.2
3.
3.
3.
3.
3.
3.1
Reference
section
3.
6.16.2
1.4.1
1.4.3