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3. TESTING AND FAULT ISOLATION
3.1. General:
3.1.1
Testing and Fault Isolation of the R-134A Air Conditioning System may be necessary if the
system does not operate and/or perform in accordance with information contained herein.
Therefore it is necessary for the service personnel to diagnose the discrepancy by
troubleshooting the system and its components. To assist in this diagnoses, refer to table 3
(Trouble Shooting List)
3.2. System Leak Check Testing Procedure:
3.2.1. A leak check of the refrigerant plumbing system is important to ensure the system
maintains its charge to provide the designed performance and reduce damage to system
components. A periodic check of the system charge is required to determine if any loss of
refrigerant has occurred.
3.2.2. A system leak check is required any time one or more of the following conditions occur:
•
New system plumbing installation
•
Component replacement in the plumbing system
•
Line or hose rupture
3.2.3. Special Tools and/or Equipment Required:
•
Gaseous dry nitrogen, regulated source (0-500 psig)
•
R-134A refrigerant charging manifold with gauges and hoses (low pressure gauge, 0-300
PSIG), (high pressure gauge, 0-600 PSIG)
•
Leak check fluid (soap solution), (Spec MS-SNOOP-GAL)
•
Assorted hand tools
•
Hand and eye protection
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TESTING AND FAULT ISOLATION
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