NEC SV8500 Operation And Maintenance Manual - page 630
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CHAPTER 5
Operation Procedure for System with PIR
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All FANs stop by this operation.
STEP 5: Disconnect the cable from the FA NU connector.
•
Use a flat-blade screwdriver.
STEP 6: Loosen the screws fixing the FAN tray on both sides.
FAN PWR SW (upward)
flat-blade screwdriver
FANU connector
screw (left)
a Phillips head screwdriver
screw (right)