Yaskawa V74X Drives - Manual (Page 2)

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WARNINGS, CAUTIONS, INSTRUCTIONS
YASKAWA manufactures component parts that can be used in a wide variety of industrial applications. The selection and
application of YASKAWA products remain the responsibility of the equipment designer or end user. YASKAWA accepts no
responsibility for the way its products are incorporated into the final system design. Under no circumstances should any
YASKAWA product be incorporated into any product or design as the exclusive or sole safety control. Without exception, all
controls should be designed to detect faults dynamically and fail safely under all circumstances. All products designed to
incorporate a component part manufactured by YASKAWA must be supplied to the end user with appropriate warnings and
instructions as to that part’s safe use and operation. Any warnings provided by YASKAWA must be promptly provided to the
end user. YASKAWA offers an express warranty only as to the quality of its products in conforming to standards and specifi-
cations published in the YASKAWA manual. NO OTHER WARRANTY, EXPRESS OR IMPLIED, IS OFFERED. YASKAWA
assumes no liability for any personal injury, property damage, losses, or claims arising from misapplication of its products.
• Do not connect or disconnect wiring while the power is on. Do not remove covers or touch circuit boards while
the power is on.
• Before servicing, disconnect all power to the equipment. The internal capacitor remains charged even after the
power supply is turned OFF. Status indicator LEDs and Digital Operator display will be extinguished when the DC
bus voltage is below 50 VDC. To prevent electric shock, wait at least 5 minutes after all indicators are OFF.
• Do not perform a withstand voltage test on any part of the unit. This equipment uses sensitive devices and may
be damaged by high voltage.
• The drive is not suitable for circuits capable of delivering more than 18,000 RMS symmetrical amperes at 250V
maximum or 480V maximum. Install adequate branch short circuit protection. Refer to page 13. Failure to do so
may result in equipment damage and/or personal injury.
• Input Fuses are required for proper branch short circuit protection for all NEMA type 4X/12 drives. Failure to use
recommended fuses (See Appendix 4) may result in damage to the drive and/or personal injury.
WARNING
WARNING
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