Chapter 2 Installation and WiringVFD-EL-W
16
After removing the covers of input/ output side terminals and control board terminals, verify the main
circuit terminals and control circuit terminals are clear. Be sure to observe the following precautions
when wiring.
Turn off the AC motor drive power before installing any wiring. A hazardous charge
may still remain in the DC bus capacitors after the power has been turned off. For
your safety, wait until the digital keypad indictor turns off and measure the DC
voltage with the voltmeter. Makes sure the voltage drops to a safe level < 25 V
DC
before wiring. Performing a wiring installation while voltage remains may cause
sparks and short circuits.
Only qualified personnel familiar with AC motor drives are allowed to do the wiring.
Make sure the power is turned off before wiring to prevent electric shock.
Make sure that power is only applied to the R/L1, S/L2, and T/L3 terminals. Failure
to comply may result in damage to the equipment. The voltage and current should
be in the range on the AC motor drive nameplate.(refer to Section 1-1 Receiving
and Inspection for details)
The grounding terminals must be well-grounded to prevent electric shock or fire
accidents and to reduce noise interference.
Make sure that you correctly tighten the main circuit terminal screws to prevent
sparks that can be caused by screws loosened due to vibration.
When wiring, choose wires that comply with local regulations for your safety.
Check following items after finishing the wiring:
1. Are all connections correct?
2. Are there any loose wires?
3. Are there any short circuits between the terminals or to ground?
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