Emerson Liebert CRV 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 C R 0 2 0 R A 1 C 7 S D 1 8 1 1 E L 1 0 P A - Manual (Page 115)

Maintenance
107 Liebert ® CRV ™
14.0 M
AINTENANCE
14.1 Safety Instructions
All maintenance operations must strictly observe national, state and local accident prevention
regulations, especially the regulations concerning electrical systems, refrigerators and manufacturing
resources.
Air conditioning equipment maintenance may be performed only by authorized properly trained and
qualified personnel.
To keep all warranties valid, the maintenance must adhere to the manufacturer’s regulations.
NOTICE
Risk of improper maintenance. Can cause equipment damage.
All maintenance must be performed only by authorized properly trained and qualified
personnel.
Ignoring safety instructions can be dangerous to persons as well as to the environment. Soiled parts
always cause a loss of performance and, for switch or control devices, can lead to the breakdown of a
plant.
!
WARNING
Arc flash and electric shock hazard. Can cause injury and death.
Disconnect local and remote power supplies and wear appropriate personal protective
equipment per NFPA 70E before working within.
Before proceeding with installation, read all instructions, verify that all the parts are included
and check the nameplate to be sure the voltage matches available utility power.
The Liebert iCOM
® microprocessor does not isolate power from the unit, even in the Unit Off
mode.
Some internal components require and receive power even during the Unit Off mode of the
Liebert iCOM control.
The factory-supplied optional disconnect switch is inside the unit. The line side of this switch
contains live hazardous voltage potential.
Install and open a remote disconnect switch and verify with a voltmeter that live hazardous
voltage potential is not present inside the unit cabinet before working within. Refer to the
unit electrical schematic.
Follow all national and local codes.
!
WARNING
Risk of contact with rotating fan blades and extremely hot and/or cold surfaces. Can cause
equipment damage, injury and death.
Disconnect all local and remote electric power supplies before working within. Perform
maintenance only when the system is de-energized, all fan blades have stopped rotating and
component temperatures have become safe for human contact.
• Turn Off the system by switching it Off at the controller and the main disconnect switch.
• Post a warning sign saying “Do not switch on.”
• Electrical components of the unit must be switched Off and checked using a voltmeter to
ensure they are not receiving electrical input power.
!
WARNING
Risk of hair, clothing and jewelry entanglement with high speed rotating fan blades. Can
cause equipment damage, serious injury or death.
Keep hair, jewelry and loose clothing secured and away from rotating fan blades during
operation.