Alcatel-Lucent 7450 ESS-1, Installation Manual

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7450 ESS-1 Overview
7450 ESS-1 Page 15
Power System
The 7450 ESS-1 chassis is designed with a load-sharing power system ( Figure 2 ). AC and DC or
DC/DC input systems can support the full system current requirements.
For redundancy, the systems must be cabled and powered on at all times.
An AC power cable is shipped with each power supply. If the cable does not meet your local
safety codes, then replace with a compliant cable. DC power cables are not provided.
The LEDs located on the front panel of the chassis indicates normal online (green), fault (amber),
or offline (not lit) AC and DC power conditions.
Always operate an energized chassis with the safety cover installed to prevent contact with
hazardous voltages and currents and prevent accidental removal.
Fans
The 7450 ESS-1 system is cooled by six integrated variable speed fans. Air flows through the
system from the side filtered-intake vent through the chassis to the opposite side vent. The fan rate
is reduced at normal temperatures and increases to high speed when the operating temperature
rises above 68° C (154° F). When the temperature drops to 50° C (122° F) the fans return to the
half speed rate.
The fan LED located on the front panel of the chassis indicates normal online (green), fault
(amber), or offline (not lit) if there is no power to the fans. The fans are not field replaceable.
If the fan LED is lit amber (which indicates a fan problem), use the
show card 1 detail
CLI command to monitor the current temperature and temperature threshold fields. If the
temperature rises and remains above the temperature threshold, an alarm is generated. Repair or
replace the unit immediately.
Call your technical support representatives for replacement instructions as soon as a failure is
detected or replace the 7450 ESS-1 immediately.