User`s guide

20 007-5536-001

3: System Interfaces Overview

Figure 3-1 Serverboard Control Panel Example

Overheat/Fan Fail/UID

When this LED flashes, it indicates a fan failure. When on continuously it indicates an overheat

condition, which may be caused by cables obstructing the airflow in the system or the ambient

room temperature being too warm. Check the routing of the cables and make sure all fans are

present and operating normally. You should also check to make sure that the chassis covers are

installed. Finally, verify that the heatsinks are installed properly. This LED will remain flashing

or on as long as the indicated condition exists.

Note: The Overheat/Fan fail /Unit ID LED is a bi-color (Red/Blue) that can indicate unit

identification (UID) when activated by an IPMI tool command, or manually by a switch on the

rear of the chassis.

PowerRESET

RESET

Overheat/Fan fail/Unit ID (bi-color) LED

NIC 2 activity LED

NIC 1 activity LED

HDD activity LED

Power LED

RESET

Control panel:

Node board 2

Control panel:

Node board 1