Precautions For Maintenance And; Inspection Check Points; Part Replacements - Larsen & Toubro C*2000 Series User Manual

Chapter 12 Troubleshoot and maintenance
12.3 Precautions for maintenance
Ensure to cut off the power supply before maintenance.
Make sure to perform maintenance after checking the DC link capacitor has discharged.
LTVF-Cx2000 series uses many semiconductor components. Take correct measures
against electrostatic damage while installing or inspecting it.
Do not change various apparatuses and connectors inside the inverter.
12.4 Inspection points
Daily inspection
Inspect if the installation environment is suitable or not.
Inspect if there is any abnormity about the cooling system.
Inspect if there is any
Inspect if there is any overheating or discoloration.
Periodic inspection
Inspect if screws and bolts may become loose or rust due to influences from external
environment, do retighten or replace them.
Check if there is any foreign substance in the inverter or radiator， please remove it with an air
blower if possible
Check if there are such abnormities, for example, the cool fan runs abnormally, the outside change a
nd capacity of the electrolytic capacitor reduce and the electromagnetic contractor has a bad contact,
etc， do replace them if possible.
12.5 Part replacement
The inverter consists of electronic parts with semiconductor apparatuses. Due to service limit of
parts about structures or properties, the inverter has worse performance or any fault occurs, so the
parts shall be replaced periodically.
Part name
Cool fan
DC link capacitor
Electrolytic capacitor on control board
Relay
12-8
Warning
or noise.
vibration
Change period Method of replacement
3 New part
4 New part
4 New part
- Decide after investigation
Cx2000 AC Drive