E6581595
B-2
2
Warning
Be Grounded
Ground must be connected securely.
If the ground is not securely connected, it could lead to electric shock or fire when a malfunction or
current leak occurs.
Caution
Prohibited
Do not attach devices with built-in capacitors (such as noise filters or surge absorber) to the output
(motor side) terminal.
This could cause a fire.
Preventing radio noise
To prevent electrical interference such as radio noise, separately bundle wires to the main circuit's power
terminals (3-phase models: R/L1, S/L2, T/L3, single-phase models: R/L1, S/L2/N) and wires to the motor
terminals (U/T1, V/T2, W/T3).
Control and main power supply
The control power supply and the main circuit power supply for the VFnC3 are the same.
If a malfunction or trip causes the main circuit to be shut off, control power will also be shut off. When
checking the cause of the malfunction or the trip, use the trip holding retention selection parameter.
Wiring
Cover the crimp-style terminal with insulated tube, or use the crimp-style terminal with insulation sleeve
when crimp-style terminals are used for the main circuit terminals.
Connect the terminals so that adjacent terminals do not touch each other.
For ground terminal use wires of the size that is equivalent to or larger than those given in table 10.1
and always ground the inverter (240V voltage class: D type ground).
Use as large and short a ground wire as possible and wire it as close as possible to the inverter.
For the sizes of electric wires used in the main circuit, refer to the table in section 10.1.
The length of the main circuit wire in table 10.1 should be no longer than 30 meters. If the wire is longer
than 30 meters, the wire size (diameter) must be increased.
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