7450 ESS-7 Overview
7450 ESS-7 Page 33
The fan status indicator LEDs, labeled Fan Status, are displayed on the SF/CPM front panel (see
Figure 5 on page 20). Table 5 on page 21 provides LED descriptions. The green LED indicates
normal operation. The LED is amber if there is a fan failure or unlit if there is no power to a fan.
Fan trays are factory installed. There are no field replaceable parts within the fan tray. The entire
fan tray must be replaced if a component, such as a single fan, fails.
The fan tray must always be installed and fully operational while the 7450 ESS-7 is powered up.
During routine maintenance and fan tray replacement, the system can operate safely for up to
approximately 5 minutes at an ambient temperature of 95°F (35°C).
AIR FILTER
One air filter prevents large particles, debris, and dust from entering and circulating through the
system. Filters should be inspected monthly and cleaned and replaced every twelve months or as
required.
The filter is factory installed and is field replaceable.
BLANK PANELS
Blank panels and faceplates are required in all empty card and component slots to prevent excess
dust accumulation and to help control airflow and electromagnetic interference, and for safety
reasons. Blanks do not have board components or connector pins.
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