Siemens SINUMERIK 840D sl TCU 30.3 - Repair

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.
Service and maintenance
TCU 30.3
74 Manual, 09/2017, A5E40874197