6-1 Inspection and Maintenance „ Daily Inspection and Periodic Inspection 6 Inspection and Maintenance *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.
6-3 Inspection part Inspection item Inspection point Inspection period Inspection method Criteria Meter Daily Periodic 1 year 2 years General Ambient environment Check ambient temperature, as well as humidity and dust levels. { Refer to "2-1 Installation". Ambient temperature 10°C to 50°C, no freezing. Ambient humidity 90% max., no condensation. Thermometer Hygrometer Recorder Entire device Check that there are no abnormal vibrations or sounds. { Visual or acoustic inspection No faults Power supply voltage Check that the main circuit voltage is normal. { Measure the voltage between Inverter main circuit terminals R/L1, S/L2, and T/L3. Must be within allowable fluctuation of AC voltage.
Tester, digital multimeter Main circuit General Megger check (between main circuit terminal and ground terminal) { Disconnect the I/O wirings of the Inverter main circuit terminal block, detach the control terminal block board, and remove the short-circuit bar used for switching the Inverter built-in filter function. Then, use a megger to measure the resistance between the ground terminal and the short-circuited parts of terminals R/L1, S/ L2, T/L3, U/T1, V/T2, W/T3, P/+2, +1, N/-, RB, Ro, and To. 5 MΩ min. 500 V DC megger