IF ...
THEN ...
the PWR ON LED does
not light up on the Fan
Unit,
switch all circuit breakers on the
subrack backplane to the OFF position
and replace the affected Fan Unit.
the PWR ON LED lights
up on the Fan Unit,
END OF STEPS
Power failure
Installation trouble shooting
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A - 4
Lucent Technologies
365-374-074
Issue a, April 2002
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