12Maintenance and Inspection Daily Annual• Ambient temperature, humidity, speck, dust or foreign object • Abnormal vibration and noise • Main circuit voltage • Odor • Lint or other particles at air holes • Cleanness at front portion of the driver and connecter • Damage of the cables • Loose connection or misalignment between the motor and machine or equipment • Pinching of foreign object at the load • Loose tightening • Trace of overheat • Damage of the terminalsType Cycles Items to be inspectedDaily inspectionPeriodical inspection• Routine maintenance and inspection of the driver and motor are essential for the proper and safe operation.Notes on Maintenance and Inspection1) Turn on and turn off should be done by operators or inspectors themselves.2) Internal circuit of the driver is kept charged with high voltage for a while even after power-off. Turn off thepower and allow 15 minutes or longer after LED display of the front panel has gone off, before performingmaintenance and inspection.3) Disconnect all of the connection to the driver when performing megger test (Insulation resistance mea-surement) to the driver, otherwise it could result in breakdown of the driver.Inspection Items and CyclesGeneral and normal running conditionAmbient conditions : 30˚C (annual average), load factor of 80% or lower, operatinghours of 20 hours or less per day.Perform the daily and periodical inspection as per the items below. Inspection cycle may change when the running conditions of the above change.
