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2-3
2-3 Connection
Remove the surface cover before connecting the terminal blocks as follows.
2-3-1 Basic connection
①Always connect power to the L1/R, L2/S, and L3/T main circuit power terminals of the inverter.
Connecting power to another terminal will damage the inverter. Check that the power voltage is
within the maximum allowable voltage marked on the nameplate, etc.
②Always ground the ground terminal to prevent disasters such as fire or electric shock and to
minimize noise.
③Use a reliable crimp terminal for connection between a terminal and a cable.
④After terminating the connection(wiring), confirm the following:
a. Confirm that the connection is correct.
b. Confirm that all necessary connections have been made.
c. Confirm that there is no short-circuit or ground fault between terminals and cables.
⑤Connection modification after power-on
The smoothing capacitor in the direct current portion of the main circuit cannot be discharged
immediately after the power is turned off. To ensure safety, use a multimeter to check that the
voltage of the direct current (DC) is lowered to the safety range (25V DC or less)after the charge
lamp goes off. Also, confirm that the voltage is zero before short-circuiting. The residual voltage
(electric charge) may causesparks.
！
WARNING
• Always connect a ground wire.
Electric shock or fire may result.
• Ensure that a licensed specialist performs all wiring works.
• Confirm that the power is turned off (open) before commencing wiring
operations.
Electrical shock may result.