Scania EMU DTC 4187 Refrigerant compressor E157, internal fault

EMU EMU control unit · Scania

Code 4187 (decimal). Some diagnostic tools show it in hexadecimal as 00105B.

In short

The refrigeration compressor reports too high a VCB voltage (above 850 V).

Applies to: EMU1 (ECS)

What does Scania EMU fault code 4187 mean?

What causes Scania DTC 4187?

How does the system react?

What are the symptoms?

How to fix Scania EMU fault code 4187?

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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.

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