Workshop Manuals Factory service & repair Aston Martin
Aston Martin DB7 Factory Workshop Manual Volume 2: Electrics, Body and Air Conditioning (1994-1998)04 · Air conditioning
04 · Heating & A/C

System Fault Diagnosis

Make
Aston Martin
Model
DB7 Factory Workshop Manual Volume 2: Electrics, Body and Air Conditioning
Year
1994–1998
Section
Contents › System Fault Diagnosis
Air conditioningSystem Fault Diagnosis

System Fault Diagnosis

Fault Finding8-30
Blower Motor Test8-33
Open Water Temperature Switch Needs8-33
Short Water Temperature Switch Leads8-33
Refrigeration8-34
Compressors8-35
Compressor Clutch Control8-35
Trinary Switch8-35
Condenser8-35
Receiver-Drier8-36
Evaporator8-36
Expansion Valve8-36
Sanden Compressor SD7H158-37

Manifold Gauge Set

System Checking with the Manifold Gauge Set8-39
Evacuating the Manifold Gauge Set8-39
Connecting the Manifold Gauge Set8-39
Stabilising the System8-39
Purging the Test Hoses8-40
Leak Test8-40
Manifold Gauge Set Check Procedures8-41
Refrigerant Slightly Low.8-41
Refrigerant Excessively Low.8-42
Air In The System.8-42
Compressor Malfunction8-43
Moisture in the System8-44
A Large Amount of Air in the System.8-45
Expansion Valve Malfunction.8-45
Expansion Valve Malfunction8-46
Restriction in the High Pressure Side.8-46
Torque Levels for the Hose Connections8-47

Air Conditioning Procedures

Depressurising8-47
Recovering Refrigerant8-47
Evacuating and Recycling the Refrigerant8-48
Recharging the System8-49
Compressor Oil Check8-49

Parts & tools for this job For 1994 Aston Martin DB7

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