6-1 Inspection and Maintenance 6 *1. The life of the smoothing capacitor depends on ambient temperatures. Refer to "Appendix-2 Product Life Curve" for the replacement reference. *2. The life of the cooling fan varies depending on the environmental conditions, such as ambient temperature and/or dust. Check the operation through daily inspections. *3. The replacement reference (year/cycle) or " Appendix-2 Product Life Curve " is based on the expected design life, which is not guaranteed.
Inspection and Maintenance 6-6 Inspection part Inspection item Inspection point Inspection period Inspection method Criteria Meter Daily Periodic 1 year 2 years Motor General Check that there are no abnormal vibrations or sounds. { Acoustic, feeling, and/ or visual inspection No faults Check that there are no abnormal odors. { Check that there is no abnormal odor caused by damage or overheating. No faults Insulation resistance Megger check (Between the collective motor terminals and ground terminal) { Disconnect Inverter main circuit terminals U/T1, V/T2, and W/T3, and short- circuit the 3-phase motor wires.
Then, use a megger to measure the resistance between the motor wire and ground terminal. 5 MΩ min. 500 V DC megger