46 VERTIV™ - Liebert
®
EFC - UM - 10040805MAN_ENG - 30.03.2023
Safety systems not connected Execute electric connection
Electric system failure Call electric maintenance
Electric components failure Replace component
Clean coils
Too much air pressure drop
Check system/plant design
Adapt fan section
Dampers shut Open and adjust dampers
Install missing components (while unit is out)
Inspection doors open Close doors
Not airtight panels Check panel gaskets and restore if necessary
Too little air pressure drop
Adjust dampers
Check system/plant design
Adapt drive
See anomaly 2)
Open external supply valve and verify the
functionality of the unit inlet supply valve.
Check pump electric connections
Clean water strainers
Check and adjust water ball-cock after the
pump if present.
Check water level switches
Droplet separator damaged Replace droplet separator
Fan isolators inadequate Call Technical Department
Rotating parts out of balance Call Technical Department
Foreign matters in rotating parts Clean internal part (while unit is out)
See anomaly 3)
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