Panasonic VF0 Series 400V class Instruction Manual

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79CAUTIONz Wait at least 5 minutes after turning the input power OFF before startinginspection.Failure to do so could lead to electric shock.z Maintenance, inspection and part replacement must be done by qualifiedpersons.(Remove all metal personal belongings (watches, bracelets, etc.) beforestarting the work.) (Use tools treated with insulation.)Failure to do so could lead to electric shock or injury.ATTENTIONz Have an electrician periodically tighten the terminal screws.Loosening of the terminal screws could lead to overheating or fire.1. Precautions for inspections· When measuring the insulation between the power line and motor line, alwaysdisconnect the wires connected to the inverter first. Do not perform a megger test on thecontrol circuit.· The inverter is mainly configured of semiconductor elements. So, daily inspections mustbe carried out to prevent the effect of the working environment such as the temperature,humidity, dust and vibration, to prevent problems that occur due to the passage of partusage and part life.The standard replacement term that apply when the inverter is used in a generalenvironment (ambient average annual temperature 30°C, load rate of 80% or less, and12 working hours or less a day) are given on the next page.2. Inspection items1) Daily inspection : Check that the inverter is operating as intended.Check the input and output voltages of the inverter during operationusing a voltmeter.2) Periodic inspection : Check all locations where inspection can only be performed whenthe inverter is stopped.Maintenance and Inspection