LED I
NDICATORS
AND
B
UTTONS
HL U
NIT
76
M86 S
ECURITY
I
NSTALLATION
G
UIDE
HL Unit
Front LED Indicators and Buttons for Hardware Status
Monitoring
On an HL unit, the following control panel buttons, icons, and LED indicators for
hardware status monitoring display on the right side of the front panel:
HL chassis control panel
The buttons and LED indicators for the depicted icons function as follows:
UID
(button) – On an HL unit, when the UID button is pressed, a
steady blue LED displays on both the front and rear of the chassis
(see also Rear of chassis). These indicators are used for easy loca-
tion of the chassis in a large stack configuration. The LED remains on
until the button is pressed a second time.
Overheat/Fan Fail
(icon) – This LED is unlit unless the chassis is
overheated. A flashing red LED indicates a fan failure. A steady red
LED (on and not flashing) indicates an overheating condition, which
may be caused by cables obstructing the airflow in the system or the
ambient room temperature being too warm.
NIC2
(icon) – A flashing green LED indicates network activity on
LAN2.
NIC1
(icon) – A flashing green LED indicates network activity on
LAN1.
HDD
(icon) – In addition to displaying in the control panel, this icon
also displays on the front panel on each hard drive carrier. A green
LED indicates hard drive activity. An unlit LED on a drive carrier may
indicate a hard drive failure.
Power
(icon) – The LED is unlit when the server is turned off. A steady
green LED indicates power is being supplied to the unit’s power
supplies. (See also Rear of chassis.) A steady amber LED—or an unlit
LED—may indicate a disconnected or loose power supply cord.
Power
(button) – When the power button is pressed, the main power
to the server is turned on. When the power button is pressed again,
the main power to the server is removed but standby power is still
supplied to the server.
LED Indicator Key
PWR = Power
HD = HDD Activity
NIC1 = LAN 1
NIC2 = LAN 2
OH = Overheat
UID = Unique IDentifier
Summary of Contents for HL
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