Scania EMU DTC 12556 VCB Fan A motor overspeed error

EMU EMU control unit · Scania

Code 12556 (decimal). Some diagnostic tools show it in hexadecimal as 00310C.

In short

VCB Fan A internal diagnostics report that motor speed is too high.

Applies to: EMU1 (ECS)

What does Scania EMU fault code 12556 mean?

What causes Scania DTC 12556?

How does the system react?

What are the symptoms?

How to fix Scania EMU fault code 12556?

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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.