TROUBLESHOOTING
11USB-Link 2 Technical Guide
Troubleshooting
Troubleshooting Tips
Problems with Prism 2 Software
• Verify that the correct COM port, created by the USB
connection, is selected in the Job-Sites Window. Verify
the COM port number by right-clicking on the Windows
icon, selecting <Device Manager>, and viewing <Ports>.
• Verify that the radio button <CommLink 5 or USB-Link II>
is selected for the Type of CommLink in the Job-Sites
Window.
• Verify that the correct USB-Link 2 mode is selected
under Network Conguration in the Job-Sites Window.
Problems with USB Connection
• Verify that the USB-Link 2’s USB LEDs blink when you
perform a Search for Units or try to open a status screen in
Prism 2.
• If the USB-Link 2’s USB LEDs fail to blink, disconnect and
reconnect the USB connection.
• If the problem persists, check that the USB drivers
have been installed properly
Problems with RS-485 Wiring
• Make sure T connects to T, R to R, and Shld to Shld if
multiple boards are wired together on a loop.
• Make sure that the USB-Link 2 mini-DIN communication
cable is plugged into a controller or wired to the local
side of the loop.
Problems Viewing Controllers on a Network
• Make sure that in Prism 2, <USB Link Network> is
selected under Network Conguration in the Job-Sites
Window.
Support Information
Support is available Monday through Friday
7:00 A.M. to 5:00 P.M., Central Time.
1-866-918-1100 | 1-918-382-6450
controls.support@aaon.com
NOTE: AAON Technical Support cannot troubleshoot internal PC
and/or Windows-based operating system problems.
NOTE: AAON Technical Support cannot troubleshoot rewalls,
routers, and/or problems on a customer’s internal or external
network. An IT professional may need to be consulted.
WARNING: Older operating systems, while they still
might be capable of running Prism, are not recommend-
ed due to security updates being obsoleted by Microsoft.
We also do not support troubleshooting of any version
of Windows operating the Prism program. Some new
models of laptops running the latest release of Windows
10 have also experienced issues running Prism, and we
cannot troubleshoot customer computer issues.
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