Panasonic AMK3000P22 Installation Manual

Contents

28U Maintenance and Inspection6.1 Safety PrecautionsDangerWait at least five minutes after turning off the input power beforestarting the maintenance and inspection work.Failure to do so may result in electric shock.Maintenance, inspection and part replacement work must bedone only by qualified persons.(Remove metal articles such as watch, bracelet(s) etc. beforeoperation.)(Please use insulated tools.)Failure to do so may result in electric shock or injury.Do not replace the cooling fan when power is ON. Failure to doso may result in electric shockCaution Employ an electrical engineering company to periodicallytighten the terminal screws.Loose terminal screws could lead to overheating or fire.6.2 Precautions on Inspection· To measure the insulation resistance between the power supply cable and the motorcable with a megger, always disconnect the wires connected to the inverter firstbefore measuring. Do not make such measurement on the control circuit.· The inverter is mainly consisted of semiconductor elements. To prevent the negativeeffects arising from the temperature, humidity, dust and vibration etc. in workingenvironment and the malfunctions caused by components’aging and service life,please perform daily inspection. The following table shows the standard replacementinterval (years) under normal working conditions (average annual ambienttemperature = 30℃ , load factor < 80% and average daily operation period < 12 h).6.3 Inspection Items1. Daily inspection:Basically check if abnormality occurs during operation. A multimeteris normally used to check the input and output voltages of theinverter during operation.2. Periodic inspection:To check all locations where inspection can be performed onlywhen the inverter is stopped and where periodic inspection isrequired.