4-2 Daily Inspection and Periodic Inspection 4 Inspection and Maintenance *1. The life of the capacitor depends on ambient temperatures. Refer to "4-5 Capacitor Life Curve"(Page 4-6) for the replacement reference. •Do not conduct a withstand voltage test on any part of the Regenerative Braking Unit. The Regenerative Braking Unit uses semiconductors in the main circuit. If the unit undergoes a withstand voltage test, it may cause semiconductor deterioration. 4-3 Inspec- tion part Inspec- tion item Inspection point Inspection period Inspection method Criteria Meter Daily 1 year Main circuit Resistor There are no crack or discolor- ation. { Visual inspection.
Cement resistor, wire-wound resis- tor, etc. No faults Tester, Digital multimeter Check for any wire breakage { Disconnect one end of the cable, and measure the resistance using a tester. Error must be within ±10% of the nominal resistance. Control circuit Protec- tion circuit Opera- tion check Check that there are no errors in protection and display circuits through sequence protection operation. { Simulate the protection circuit output Error is found in the se- quence. Compo- nents General Check that there are no abnormal odors, discolora- tion, or significant rusting. { Visual inspection No faults Smooth- ing ca- pacitor on the PCB Check that there is no liquid leak- age.
{ Visual inspection No faults Standard replacement period: 5 years (*1) Check that the safety valve has not come out and that there are no bulges. {