Siemens SINUMERIK ONE NCU 1740 Equipment Manual page 92

Service and maintenance
10.1 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, with details of the malfunction. The device
must only be repaired there.
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Equipment Manual, 10/2021, A5E51087503B AA
NCU 1740