ABB IRC5P, Product Manual, Page: 172 / 220

8 Trouble Shooting
8.2 General Description and Hints
172 3HNA009834-001 en Rev.06 Product Manual, Control Cabinet IRC5P
8.2.3 Work Systematically
Do Not Replace Units
Randomly
Before replacing any part at all, it is important to establish a probable cause for the
fault, thus determining which unit to replace.
Randomly replacing units may sometimes solve the acute problem, but also leaves
the trouble shooter with a number of units that may or may not be perfectly
functional.
Replace one Component
at a Time
When replacing a presumably faulty unit that has been isolated, it is important that
only one unit is replaced at a time.
Always replace components according to procedures in the Repair chapter of the
product manual for the manipulator and controller at hand.
Test the system after replacing to see if the problem has been solved.
If replacing several units at once:
• It is impossible to determine which of the units was causing the fault.
• It greatly complicates ordering a new spare part.
• It may introduce new faults to the system.
Take a Look Around
Often, the cause may be evident by visual inspection. In the area of the unit acting
erroneously, be sure to check:
• Are the attachment screws secured?
• Are all connectors secured?
• Are all cabling free from damage?
• Are the units clean (especially electronic units)?
• Is the correct unit fitted?
Check for Tools Left
Behind
Some repair and maintenance work require use of special tools to be fitted to the
robot equipment. If these are left behind (e.g. a signal cable to a computer unit used
for measuring purposes), they may cause erratic robot behavior.
Make sure all tools are removed when maintenance work is completed.