OpenEye GraniteRack 3U - Manual (Page 30)

Getting Started
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11. Power Supply Power On Indicator
Green LED indicates power is on.
12. Cooling Fan module 1 ~ 2 (From left to right)
Two blower fans are located at the rear of the subsystem. They provide suffi-
cient airflow and heat dispersion inside the chassis. In case a fan fails to
function, the “ ” Fan fail LED will turn red and an alarm will sound. You will
also see an error message appear in the LCD screen warning you of fan
failure.
14. Fan Fail indicator
If a fan fails, this LED will turn red.