Fault Code 30

Fault Code 30

AC - signal unclear

Diagnostic conditions

NOTE:
- This fault can be determined only during a system test.
- Perform system test

Possible cause of fault
- Fuse D 6 faulty
- Fuse C 7 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 magnetic clutch faulty
- Relay for fresh-air blower faulty
- Magnetic coupling faulty
- Air-conditioning system regulator faulty

Affected pins
Plug B, pin 16

Diagnosis/troubleshooting

NOTE: After troubleshooting, a system test must be carried out.

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