Cautions For Wiring; Measures For Noise; Control Power Supply - Toshiba TOSVERT VF-AS3 Instruction Manual

2. 3. 1

Cautions for wiring

• Never remove the front cover when the power is on.
The unit contains high voltage parts and contact with them will result in electric shock.
Prohibited
• Mount the front cover after wiring.
If you turn the power on without attaching the front cover, this will result in electric shock or
other injury.
• Electrical construction work must be done by a qualified expert.
Erroneous connection of power supply by someone who does not have that expert knowledge
will result in fire or electric shock.
• Connect output terminals (motor side) correctly.
If the phase sequence is incorrect, the motor will operate in reverse and that can result in injury.
• Wiring must be done after installation.
If you perform wiring prior to installation, this will result in electric shock or other injury.
Mandatory
action
• Verify that the power is turned off and the charge lamp is off before starting wiring.
If you perform wiring without verification, this will result in electric shock.
• Tighten the screws on the terminal block to specified torque.
If the screws are not tightened sufficiently to the specified torque, this will result in fire.
• Verify that the power supply voltage is within +10% and -15% (±10% when the load is 100% in
continuous operation) of the applied power supply voltage written on the name plate.
If you do not use the appropriate power supply voltage, this will result in failure or fire.
• The grounding wire must be connected securely.
If the grounding wire is not securely connected, when the inverter has failure or earth leakage,
this will result in electric shock or fire.
Be
grounded
• Do not attach devices with built-in capacitors (such as noise reduction filters or surge absorb-
ers) to the output terminals (motor side).
Heat rises up and this could cause a fire.
Prohibited
Pay attention to the following when wiring.

■ Measures for noise

To prevent electrical interference due to high-frequency noise generated by the inverter, separately
bundle wires to the power circuit's power side terminals ([R/L1], [S/L2], [T/L3]) and wires to the
motor side terminals ([U/T1], [V/T2], [W/T3]).

■ Control power supply

The control power of this inverter is supplied inside from the power circuit power supply. Therefore, if
a malfunction or trip causes the power circuit to be shut off, control power will also be shut off.
• To check the cause of the malfunction or trip, set <F602: Trip record retention> to "1: Retain at
power off."
WARNING
CAUTION
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2. Installation and wiring
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