Siemens SINUMERIK 840D sl Equipment Manual page 32

Service and maintenance
Suspected malfunction
If you suspect a malfunction due to unusual product reactions, isolate the device from power.
Immediately inform qualified personnel to check the function and ensure that the product
functions correctly.
The following signs can indicate a malfunction:
• Unusual or no functioning
• Unusual heat generation
• Smoke development
Repair
Send the device back to the manufacturer for repair. The device must only be repaired there.
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Operator panel front: OP 010S
Equipment Manual, 12/2022, A5E50751046B AA