Toshiba TOSVERT VF-AS3, Instruction Manual

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E6582062 
14. Maintenance and inspection
14-4
9
14
• Remove the power supply wiring connected to the power terminal block and the wiring to the
motor.
• Wire each power terminal.
Also, remove the wiring of the power circuit output terminals [U/T1], [V/T2], and [W/T3], and perform
an insulation resistance test only on the motor. When you perform an insulation resistance test on
the peripheral circuits in the parts other than the motor, remove all the wiring connected to the
inverter so that a test voltage will not be applied to the inverter.
14. 2. 2 Periodical inspection on the replacement parts
The inverter consists of a large number of electronic parts such as semiconductor devices. The follow-
ing parts age because of the configurations or the physical properties. If they are left unused for a long
time, the performance of the inverter will deteriorate, thus resulting in a failure. Be sure to perform peri-
odical inspection for preventive maintenance.
For replacement of each replacement part, contact your Toshiba distributor. Do not replace the parts on
your own for safety.
Important
• Perform an insulation resistance test only on the power terminal block. Do not perform an
insulation resistance test on the control terminals in the parts other than the power circuit, or on
the circuit terminals mounted on the printed circuit board.
• Do not perform a dielectric test. Failure to do so may result in damaged internal parts.
WARNING
Prohibited
• Do not replace parts.
This will result in electric shock, fire and other injury. Please call your Toshiba distributor for
repairs and replacement of expendable parts.
Important
• The replacement cycle of the parts are influenced by the ambient temperature and the use
conditions. The replacement cycle of the parts listed here are based on the assumption that
they will be used in an environment (without corrosive gas, oil mist, dust, and metal powder,
etc.) at an ambient temperature within the specification.
• The design life expectancies and the standard replacement cycles do not warrant the lives.
500 V
megger
R/L1 S/L2 T/L3 U/T1 V/T2 W/T3