Scania EMU DTC 12555 VCB Fan A IGBT overheat warning

EMU EMU control unit · Scania

Code 12555 (decimal). Some diagnostic tools show it in hexadecimal as 00310B.

In short

VCB fan A internal diagnostics report that the IGBT's are overheating.

Applies to: EMU1 (ECS)

What does Scania EMU fault code 12555 mean?

What causes Scania DTC 12555?

How does the system react?

What are the symptoms?

How to fix Scania EMU fault code 12555?

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This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.