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Subaru R-134A manual

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Table of contents for the manual

  • Page 1

    Air Conditio ver the years, Subaru air conditioning systems have taken many differ ent shapes and sizes, from full manual, cable and vacuum-contr olled systems like those found on Loyale models, to the fully automatic electronically contr olled systems employed by the SVX and some Legacy models. Because of this great diversity in Subaru air conditi[...]

  • Page 2

    oning Systems Air Flow System The purpose of the air flow system is to provide air to the heating, ventilation, defroster , and air conditioning systems. Control of the air flow is accomplished by four types of systems which are Subaru model specific: ➊ Manual cable - Justy ➋ Manual cable/vacuum -Loyale ➌ Manual cable/electric - Legacy , Impr[...]

  • Page 3

    Fast Idle Control Device (A/C Idle Air Control) On manual transaxle equipped Justy vehicles, the FICD is incorporated in the idle-up system. Proper adjustment and operation is outlined in Service Bulletins 02-70-89 and 02-72-89. On ECVT equipped carbureted vehicles an air/fuel bypass contr ol system performs the FICD function. The ECVT air bypass c[...]

  • Page 4

    T roubleshooting and Servicing Six Step T roubleshooting The following six step method of troubleshooting will save time and ef fort in the diagnosis and analysis of air conditioning problems. It pr ovides a logical approach to solving the problem, not just tr eating the symptoms. The steps are as follows: ➊ V erify the problem (Operational check[...]

  • Page 5

    End Wrench The T o connect the manifold gauge set to the system: ➊ Fully close both of the manifold valves. ➋ Remove the compressor service valve caps. ➌ Connect the high and low pressur e hoses to the service valves. Note: Some refrigerant gas will be dischar ged as the hoses are connected to the service valves. This is normal, however , you[...]

  • Page 6

    General Preparations Always conduct a visual inspection of the air conditioning system to identify any damage, excessive wear , refrigerant leaks (oil residue), impr oper belt adjust- ment, improper pulley alignment, and plugged condenser cooling fins. Note: Never use water to clean the condenser or radiator fins. Using compressed air is the approv[...]

  • Page 7

    Air Condit ioning Charging Charging the system is r equired after servicing, r epair or replacement of system components, or to locate a leak when there is no r efrigerant in the system. Follow the steps listed below to charge the system: • Leak detection of a pressurized system is r equired to locate an otherwise unidentifiable leak in a dischar[...]

  • Page 8

    Oil Refill Subaru Air Conditioning Systems Systems End Wrench The 12 Fill the compressor with the pr oper amount of the correct type r efrigerant oil. Use of the incorrect type of compr essor oil may result in damage to the com- pressor . Refer to Subaru Service Bulletin number 10-37-84, dated 12-12-84, for compressor oil specifications for Matsush[...]

  • Page 9

    End Wrench The Subaru Air Conditioning Systems Standard Compressor Systems ➊ System performs to specifications; test complete ➋ Higher than normal pressur es indicate: —Restriction of air across condenser —Defective cooling fan(s) —Refrigerant overchar ge —Restriction in system —Air in system —Moisture in system ➌ Lower than norma[...]