Replacing Faulty Units - Omron CJ1W-CORT21 Operation Manual

Inspection Procedure
Check the items in the following table and correct any items that are below standard.
Environmental con-
ditions
Installation
6-6-3

Replacing Faulty Units

Replace a faulty User Defined CAN Unit as soon as possible. We recommend having spare Units avail-
able to restore network operation as quickly as possible.
Precautions for Correct Use Precautions for Correct Use
Observe the following precautions when replacing a faulty Unit.
• After replacement make sure that there are no errors with the new Unit.
• When a Unit is being returned for repair, attach a sheet of paper detailing the problem and
return the Unit to your OMRON dealer.
• If there is a faulty contact, try wiping the contact with a clean, lint-free cloth dampened with
alcohol.
Precautions for Safe Use
To prevent electric shock when replacing a Unit, be sure to stop communications in the network
and turn OFF the power supplies to all of the nodes (master and slaves) before removing the
faulty Unit.
CJ-series User Defined CAN Unit Operation Manual for NJ-series CPU Unit (W517)
Item
Ambient and cabinet temperature
Ambient and cabinet humidity
Dust/dirt accumulation
Are the Units installed securely?
Are the communications connectors fully
inserted?
Are the external wiring screws tight?
Are the connecting cables undamaged?
6 Troubleshooting and Maintenance
Standard
0°C to 55°C Thermometer
10% to 90% Hygrometer
(with no con-
densation or
icing)
None Check visually
No looseness Phillips head screwdriver
No looseness Phillips head screwdriver
No looseness Phillips head screwdriver
No damage Check visually
Equipment
6
6-17