Fault Code 30

Fault 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-conditioning compressor
- Pressure switch faulty
- Relay for fresh-air blower faulty
- Relay for magnetic clutch faulty

Affected terminals
Plug B, terminal 16

Diagnosis/troubleshooting

Diagnosis/troubleshooting (Part 1):

Diagnosis/troubleshooting (Part 2):

Diagnosis/troubleshooting (Part 3):