9.5.5 Compressor Electrical Failure (Motor Burnout)
If a burnout has occurred, a full system clean out is required. If not cleaned, compressor and system problems will continue.
Consult the factory for compressor maintenance. Do not attempt to remove the compressor without first contacting Vertiv
support at 1-800-543-2778.
9.5.6 Replacing a Compressor with Electrical Failure (MotorBurnout)
WARNING! Risk of electric shock. Can cause serious injury or death. 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. Open all local and remote electric
power disconnect switches and verify with a voltmeter that power is Off before working on any component of
the system.
WARNING! Risk of over-pressurization of the refrigeration system. Can cause explosive discharge of high
pressure refrigerant, loss of refrigerant, environmental pollution, equipment damage, injury, or death. This
unit contains fluids and gases under high pressure. Use extreme caution when charging the refrigerant
system. Do not pressurize the system higher than the design pressure marked on the unit's nameplate.
NOTE: Release of refrigerant to the atmosphere is harmful to the environment. Refrigerant must be recycled or
discarded in accordance with federal, state, and local regulations.
1. Attach suction and discharge gauges to access fittings.
2. Recover refrigerant using an approved recovery procedure and equipment. Use a filter drier when charging the
system with recovered refrigerant.
3. Remove the marked pressure transducer and the discharge pressure switch. Disconnect all electrical
connections.
4. Detach service valves from the compressor.
5. Remove the failed compressor.
6. Follow compressor manufacturer’s suggested clean-out procedures.
7. Install the replacement compressor and make all connections. Replace the gaskets or seals on the service
valves. Replace the unloading solenoid.
8. Evacuate, charge and operate per the appropriate procedure per local codes:
• Evacuation, Leak Testing, and Charging Air Cooled Systems on page32
NOTICE
Risk of improper component re-installation. Can cause equipment damage.
Identify and mark location of suction pressure transducer and discharge pressure switch. These devices look
similar and they must be reinstalled in their original location.
9.5.7 Compressor Mechanical Failure
If mechanical failure of the compressor has occurred, only the compressor needs replaced. A full system clean out is not
required..
9 Maintenance
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