Hitachi L700 Series

Chapter 6 Maintenance and Inspection
This chapter describes the precautions and procedures for the maintenance and
inspection of the inverter.
6.1
Precautions for Maintenance and
Inspection ......................................................... 6-1
6.2 Daily and Periodic Inspections ......................... 6-2
6.3
Replacing Parts ................................................ 6-3
6.4
Ground Resistance Test with a Megger ........... 6-3
6.5 Withstand Voltage Test ..................................... 6-4
6.6 Method of Checking the Inverter and
Converter Circuits ............................................. 6-4
6.7
DC-Bus Capacitor Life Curve ........................... 6-5
6.8 Output of Life Warning ..................................... 6-5
6.9
Methods of Measuring the Input/Output
Voltages, Current, and Power .......................... 6-6