Turn off the machine, and remove the stack cover.
Disconnect the RJ45 cable from the J7 port on the Maincon PCB .
Connect the RJ45 cable to the cable tester remote unit .
Disconnect the RJ45 cable from the ENET port on the side of the control cabinet .
Connect the RJ45 cable to the cable tester unit .
Select the cable test on the network cable tester.
Press the [Test] button on the unit .
Make sure the cable passes the cable test and there is no shorts or opens detected.
Note: The cable tester shown, all the LED lights (except the shield light) turn green when the cable is good . Other cable testers may show different indicators.
If cable tester detects a problem with the cable, replace the cable and test before installing.