All rights reserved 7 Servicemanual_UR3_en_rev3.1.2
2.1.2 Visual inspection of controller
Disconnect power cable from controller
Open cabinet door
Check connectors are properly inserted on printed circuit boards
Check for any dirt/dust inside of controller
If any dirt/dust is present:
» Gently use a vacuum cleaner to remove particles
» Use a soft cloth. You can add: Water, Isopropyl alcohol, 10% Ethanol alcohol or 10% Naphtha
2.1.3 Cleaning and replacement of filters
Controller box contains two filters, one on each side of controller
Remove filters from controller box and clean them thoroughly using compressed air
o Replace filters if necessary
o Gently remove the outer plastic frame and maintain the filter