Alcatel-Lucent 1830 PSS-16 Maintenance And Trouble-Clearing User Manual page 662

Supporting procedures
Replacing System Components
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Figure 3-9 Fan Unit
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3 Clean or replace the air filter prior to replacing fan unit.
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Fully loosen the two Phillips head screws at the left and right ends on the front of the fan
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unit. (The screws are captured and will not fall out of the fan unit.)
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5 Grasp fan unit handles and slide fan unit straight back until it is free of the sub rack.
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Insert new fan unit immediately.
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Note: The 1830 PSS-36/PSS-32/PSS-16/PSS-4 system cannot operate for more than
60 seconds without a fan unit installed .
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3-54
Replacing the Fan
1830 PSS-36/PSS–32/PSS-16/PSS-4
8DG60888CAAA Release 3.6.0 and 3.6.1
Issue 1 June 2011