Table 7-1 - Hn4000 Troubleshooting Steps - Hatteras HN4000 Hardware Installation Manual

7-2
Table 7-1 HN4000 Troubleshooting Steps (Continued)
Condition
One or more of the numbered 2BASE‐TL
LEDs are off.
A Network LINK LED is off.
A Network ACT LED is off.
The Cooling Unit FAIL LED is on.
You can verify that the HN4000
Note for about 2 seconds. All LEDs on the front panel should turn on until you release the button.
Refer to Appendix E for information about contacting Technical Support (via email or tele‐
phone) or accessing the Technical Support Web‐based Customer Portal.
HN4000 Hardware Installation Guide
Solution
In normal operation, a numbered 2BASE‐TL LED will be off if there is no
copper pair connected to the port (or if a copper pair is connected at the port
but is not terminated at an operational remote device).
If a numbered 2BASE‐TL LED is off when a copper pair is connected:
1. Verify that the copper pairs are terminated at an operational remote device.
2. Verify that the copper pairs are wired correctly in the copper‐pair CAT 5
cable. Refer to "Cabling 2BASE‐TL Ports" on page
In normal operation, the Network LINK LED is on when a link is detected
between the HN4000 and a remote device.
1. Verify that a cable is connected properly to the port on an operational
Ethernet device.
In normal operation, the Network ACT LED blinks when the device detects
traffic on the Network port.
If the Network ACT LED is off and the Network LINK LED is on:
1. Verify that there is Ethernet traffic on the network connection.
If the Cooling Unit FAIL LED is on, it is an indication that one or more of the
fans in the Cooling Unit have failed. To avoid damage to the equipment, the
Cooling Unit should be replaced as described in "Cooling Unit Module
Replacement" on page 6‐5.
The FAIL LED will also be on when no Cooling Unit is installed.
LEDs are working properly by pressing and holding the LAMP TEST button
. . . . . . . .
4‐7 for wiring information.
920550-5020 Rev 14