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Home >> Audi >> 2016 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> AIR CONDITIONING [R1234yf SERVICING] (TOOLS & TESTING EQUIPMENT) (CABRIOLET) >> Air Conditioning >> Working With A/C Service Station >> Pressures, Checking >> Mechanically Driven A/C Compressor, Checking Pressure With A/C System Switched On >> Pressures, Checking

Pressures, Checking

Refrigerant circuit with expansion valve, receiver/dryer with or without A/C Clutch -N25- and A/C Compressor Regulator Valve -N280- (with an A/C compressor regulated from the outside)

NOTE:

Connect the A/C service station. Refer to A/C SERVICE STATION ON REFRIGERANT CIRCUIT, CONNECTING .

If a malfunction occurs at only one evaporator in vehicles with two evaporators, check pressures in the refrigerant circuit; if they are OK, check line connection between malfunctioning evaporator and line connection end at distribution point of refrigerant lines (for constrictions or blockage). If no malfunction can be determined, empty the refrigerant circuit and refill with the specified refrigerant quantity. Then check the pressures and the A/C system cooling output again; if the complaint still exists, replace the expansion valve that is prematurely switched by the questioned evaporator. Refer to REFRIGERANT CIRCUIT .

Refer to REFRIGERANT CIRCUIT WITH IGNITION SWITCHED ON, CHECKING PRESSURE 

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