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Home >> Audi >> 2010 >> S4 Automatic DCT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1047 (Climate Control System (Service Information - Refrigerant R1234YF)) >> 87 Air Conditioning >> Working With A/C Service Station >> Pressures, Checking >> Refrigerant Circuit With Ignition Switched On, Checking Pressure >> The Refrigerant Circuit Pressure Is Lower Than Indicated in Table

The Refrigerant Circuit Pressure Is Lower Than Indicated in Table

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Not enough refrigerant in refrigerant circuit

-- Determine refrigerant circuit leaks. Refer to LEAKS, FINDING .

-- Check the pressure relief valve. Refer to PRESSURE RELIEF VALVE .

If pressure relief valve has responded. Refer to PRESSURE RELIEF VALVE .

-- Check the activation of the radiator fan or the radiator fans. Use the Vehicle Diagnostic Tester in the "Guided Fault Finding" function of the A/C system.

-- On vehicles with shut-off valves for the refrigerant circuit, check the activation and function of this shut-off valve. Use the Vehicle Diagnostic Tester in the "Guided Fault Finding" function of the A/C system (and the battery regulation). Refer to the REFRIGERANT CIRCUIT [For engine(s) CTUA, CAED, CREH, CEUC, CTGE, CREC, CYNB, CPNB]

-- Check the refrigerant pipes and hoses for cross-section constrictions due to outer damage and inadequate bending radii. Refer to REFRIGERANT CIRCUIT [For engine(s) CTUA, CAED, CREH, CEUC, CTGE, CREC, CYNB, CPNB] and REFRIGERANT CIRCUIT [For engine(s) CTUA, CAED, CREH, CEUC, CTGE, CREC, CYNB, CPNB]

-- If no error is determined, clean the refrigerant circuit. Refer to REFRIGERANT CIRCUIT, CLEANING .

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