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Maintenance
17
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. If a burnout does occur, correct the problem that caused the burnout and
clean the system thoroughly using the proper procedure. It is important to note that successive burn-
outs of the same system are usually caused by improper cleaning.
There are two kits that can be used with a complete compressor burnout: Sporlan System Cleaner and
Alco Dri-Kleener. Whichever kit is used, follow the manufacturer’s procedure.
6.6.1 Compressor Replacement
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 failed compressor 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. Disconnect all electrical connections.
5. Remove failed compressor.
6. Install replacement compressor and make all connections.
7. Pressurize and leak test the system at approximately 150 PSIG (1034 kPa) pressure.
8. Follow manufacturer’s instructions for cleanout kits.
!
CAUTION
Damage to a replacement compressor caused by improper system cleaning constitutes
abuse under the terms of the warranty, and the WARRANTY WILL BE VOIDED.
!
CAUTION
Avoid skin contact with the refrigerant and oils. Severe burns will result.
Use long rubber gloves when handling contaminated parts.
!
CAUTION
Do not loosen any refrigeration or electrical connections before relieving system pressure from
both sides of the compressor.
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
The optional three-phase scroll compressor must rotate in the correct direction to ensure
proper system operation. Wiring must be phased and connected as shown:
• PHASE “A” to T1 or Ll
• PHASE “B” to T2 or L2
• PHASE “C” to T3 or L3