Siemens SINUMERIK 840D sl TCU 30.3 Equipment Manual page 78

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Service and maintenance
Signs for a suspected malfunction:
• Unusual or no functioning
• Unusual heat generation
• Smoke development
Repair
Send the TCU back to the manufacturer for repair. The TCU may be repaired only there.
78
Equipment Manual, 03/2023, A5E40874197B AD
TCU 30.3

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