Crown CTs 4200USP/CN Operation Manual page 26

5 Troubleshooting
(continued)
Problem: Data indicator is not fl ashing, even though a valid
com mand was sent.
Possible causes:
• Command was not addressed to the USP/CN.
• Network cable is disconnected or broken.
To assist with troubleshooting, System Architect can set an option for
force the data indicator on.
Problem: Green Preset indicator is fl ashing, or is not fl ashing.
Possible cause: This is not a problem. This indicator signals the
number of the current preset, if active, by fl ashing a series of fl ashes
equal to the current preset number. A preset is considered "active" if
the USP/CN settings match those in the selected preset. If a change is
made to any setting then the preset is considered "inactive," and the
indicator stops fl ashing.
Problem: Both right indicators fl ash yellow in unison to report a fatal
error.
Possible cause: An unexpected condition within the CobraNet
inter face has been detected.
page 26
NOTE: Actual product artwork may vary slightly.
CTs Multi-Channel Power Amplifi ers
Problem: Green LINK/ACTIVITY indicator in network connector does
not illuminate or fl ash.
Possible cause: Ethernet link is broken, or network connection is 10
Mbps. Check Ethernet connections to the network switch.
Problem: Computer does not communicate with the network
devices.
Possible cause: Incorrect wiring. See Section 2.10 on network
wiring.
Operation Manual