NEC SV8500 Operation And Maintenance Manual - page 635
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CHAPTER 5
Operation Procedure for System with PIR
Blank Unit with One LOCK Key
STEP 3
Slide in the new AC/DC power unit. Check that the OPE lamp light is ON and the FAN is turn-
ing.
STEP 4
Slide the LOCK key downward to lock the unit.
STEP 5
Turn the power switch ON for the newly installed #1 side of AC/DC power unit.
Front View