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Component Operation and Maintenance
52
Electrical Failure
An electrical failure will be indicated by a distinct pungent odor. If a severe burnout has occurred, the
oil will be black and acidic.
In the event that there is an electrical failure and a complete burnout of the refrigeration compressor
motor, the proper procedures must be performed in order to clean the system to remove any acids that
would cause a future failure.
There are two kits that can be used with a complete compressor burnout - Sporlan System Cleaner
and Alco Dri-Kleener. Follow the manufacturer's procedure.
Compressor Replacement Procedure
Replacement compressors are available from your Liebert supplier. They will be shipped in a reusable
crate to the job site as required by the service contractor.
Upon shipping a replacement compressor, the service contractor will be billed in full for the compres-
sor until the replacement has been returned to the factory.
The compressor should be returned in the same container used for shipping to the job. The possible
damage causes or conditions that were found should be recorded by marking the compressor return
tag.
1. Disconnect power.
2. Attach suction and discharge gauges to access fittings.
3. Recover refrigerant using standard recovery procedures and equipment. Use a filter-drier when
charging the system with recovered refrigerant.
4. Front seat service valves to isolate the compressor. Reclaim charge from compressor.
5. Remove service valves, pressure switch capillaries, and disconnect all electrical connections.
6. Remove failed compressor.
7. Install replacement compressor and make all connections.
8. Pressurize and leak test the system at approximately 150 PSIG (1034 kPa) pressure.
9. Follow manufacturer's instructions for clean-out kits.
10. Follow charging instructions as stated in the installation manual, Liebert part number SL-11925.
!
CAUTION
Damage to a replacement compressor caused by improper system cleaning constitutes
abuse under the terms of the warranty, and the WARRANTY WILL BE VOID.
!
CAUTION
Avoid touching or contacting the gas and oils with exposed skin. Severe burns will
result. Use long rubber gloves in handling contaminated parts.
!
CAUTION
Do not loosen any refrigeration or electrical connections before relieving pressure.
NOTE
Release of refrigerant to the atmosphere is harmful to the environment and is unlawful.
Refrigerant must be recycled or discarded in accordance with federal, state, and local
regulations.
!
CAUTION
A scroll compressor must rotate in the proper direction. Record compressor motor
connections when removing failed compressor. Wire the replacement compressor motor
the same way to maintain proper rotation direction.