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The following conditions cause the EMU to increase fan speed:
Removing a fan module
A fan operating too slowly
A stalled fan
An increase in enclosure temperature
NOTE: Replace any defective fan immediately.
Status Indications
Each fan module contains status LEDs that indicate its current operating status (see
Figure 7–2).
Figure 7–2. Fan status LEDs
The green power status LED
normally O
The amber fan fault LED
failure detection.
1
1
2
Power status LED
2
Not used
3
3
Fan fault LED
CXO6358A
1
turns O
and only turns O
when enclosure DC power is removed.
N
FF
3
turns O
when power is applied to the fan. This LED is
N
if the fan stops or rotates too slowly, or upon fan
N
Fans
7–3
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