Vertiv | Liebert CRV CCD10 Condenser | User Manual
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Maintenance and Troubleshooting
Chapter 3: Maintenance and Troubleshooting
This chapter introduces the maintenance and troubleshooting of the condenser. Users should check the condenser
regularly and solve the problems in time.
WARNING! Arc flash and electric shock hazard. Can cause serious injury or death. Disconnect all local and
remote electric power supplies and wear appropriate, OSHA-approved personal protective equipment (PPE)
per NFPA 70E before working within the electric control enclosure. Customer must provide earth ground to
unit, per NEC, CEC and local codes, as applicable.
Verify with a voltmeter that power is Off. The Liebert® controller does not isolate power from the unit, even in
the “Unit Off” mode. Some internal components still require and receive
power e
ven during the “Unit Off”
mode of the controller. The factory-supplied, optional disconnect switch is inside the unit. The line side of this
switch contains live high voltage. The only way to ensure that there is NO voltage inside the unit is to install
and open a remote disconnect switch. Refer to unit electrical schematic.
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. Follow all local codes.
WARNING! Risk of electric shock. Can cause serious injury or death. Open all local and remote electric power
supply disconnect switches and verify that power is off with a voltmeter before working within any electric
connection enclosures. The Liebert® 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® control.
Installation, service, and maintenance work must be performed only by properly trained and qualified
personnel and in accordance with applicable regulations and manufacture
rs’ spec
ifications. Opening or
removing the covers to any equipment may expose personnel to lethal voltages within the unit even when it is
apparently not
o
perating and the input wiring is disconnected from the electrical source.
WARNING! Risk of contact with high-speed rotating fan blades. Can cause serious injury or death. Open all
local and remote electric power-supply disconnect switches, verify with a voltmeter that power is off, and
verify that all fan blades have stopped rotating before working in the unit cabinet or on the fan assembly. If
control voltage is applied, the fan motor can restart without warning after a power failure.
WARNING! Risk of contact with extremely hot and/or cold surfaces. Can cause injury. Verify that all
components have reached a temperature that is safe for human contact or wear appropriate, OSHA-approved
PPE before working within the electric connection enclosures or unit cabinet. Perform maintenance only when
the system is de-energized and component temperatures have become safe for human contact.
