NEC SV8500 Operation And Maintenance Manual - page 625
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CHAPTER 5
Operation Procedure for System with PIR
STEP 2: Remove the front cover of FANU for the FANC to be replaced.
STEP 3: Turn OFF (upper) the FAN Power Switch.
•
All FANs stop by this operation.
STEP 4: Remove the cables from the cable support.
STEP 5: Disconnect the FAN cables from the connector.
•
Pull the connector while unlocking.
PIR/TSWR
FANU Front Cover
FANC
FAN PWR SW (upward)
FAN cables
Cable Support