EMU 12550 Scania VCB Fan A IGBT drive circuit overvoltage

EMU EMU control unit · Scania

Code 12550 (decimal). Some diagnostic tools show it in hexadecimal as 003106.

In short

VCB fan A internal diagnostics report that the IGBT drive circuit voltage is too high.

Applies to: EMU1 (ECS)

What does Scania EMU fault code 12550 mean?

What causes Scania DTC 12550?

How does the system react?

What are the symptoms?

How to fix Scania EMU fault code 12550?

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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.

Code 12550 in other Scania systems