6-1 Inspection and Maintenance *1. The life of the capacitor depends on ambient temperatures. Refer to the product life curve in Appendix-2. When the capacitor stops operating at the end of the product's life, the Inverter must be replaced. *2. Clean the Inverter periodically. Accumulated dust in or on the cooling fan or heat sink can cause the Inverter to overheat. Measurement Methods of I/O Voltage, Current, and Electric Power 6 Below are general measurement devices for I/O voltage, current, and electric power. Measure effective values of fundamental wave for voltage, and all effective values for electric power.
Inspection and Maintenance General-purpose Inverter R/L1 I R R/L1 U/T1 I U U E R W 11 E U-V W 01 Power supply S/L2 I S S/L2 V/T2 I V V Motor E S W 12 E V-W W 02 T/L3 I T T/L3 W/T3 I W W E T E W-U 6-5 Inspection part Inspection item Inspection point Inspection period Inspection method Criteria Standard replacement period Meter Daily Periodic Display Digital Operator Check that the display is clear. Check that there are no missing parts. Check that the LED indicators are lit properly.
3 3 3 Visual inspection Normal operation Display can be read ⎯ ⎯ Measurement item Measurement point Measurement device Note Measurement value reference Power supply voltage E I Phase-to-phase voltage between R-S, S-T, and T-R (ER) (ES) (ET) Moving-iron voltmeter or Rectifier voltmeter Effective value of fundamental wave Commercial current (200-V class) 200 to 240 V, 50/60 Hz (400-V class) 380 to 480 V, 50/60 Hz Power supply current I I Current R, S, T (IR) (IS) (IT) Moving iron ammeter All effective values Input electric power W I Between R-S, S-T (W11) + (W12) Electrodynamic wattmeter All effective values Two-wattmeter method