80-16Fault code 30 · AC - signal unclear

911 Turbo (996) Air conditioning H01, H02 80 80-16Fault code 30 AC - signal unclear Diagnostic conditions • This fault can be determined only during the system test. Possible cause of fault ♦Fuse D6 faulty ♦Refrigerant pressure too low or non-existent ♦Line fault between pressure switch, relay for fresh-air blower, relay for magnetic clutch, DME control module or air-condition- ing compressor ♦Pressure switch faulty ♦Relay for fresh-air blower faulty ♦Relay for magnetic clutch faulty Affected terminals Plug B, terminal 16 Diagnosis/troubleshooting Work instruction Display OK If not OK 1 Check fuse D6 ♦Check fuse D6 ⇒ Step 2 Replace fuse D6 2 Check refrigerant pressure ⇒ Step 3 Fill system Carry out system testing → End 2 Check line between relay ♦Switch off ignition Battery voltage ⇒ Step 10 for fresh-air blower and ⇒ Step 3 ♦Remove plug from pressure pressure switch switch. ♦Measure voltage at plug of the pressure switch between pin 4 and ground ♦Switch on ignition 3 Check pressure switch ♦Measure resistance at the pres- < 5Ω Replace pressure sure switch between pins 1 and ⇒ Step 4 switch 4 Carry out system testing → End 8001 Fault code 30 80-16 page 1 Printed in Germany – 15, 2001 30xxxh02