HEIDENHAIN iTNC 530 HSCI - Procedures and tips for error diagnosis in the field

6 – 56 HEIDENHAIN Service Manual iTNC 530 HSCI
6.3 Sequence for finding serious electrical errors
The most serious electrical error on a machine tool is a ground fault or short-circuit!
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A ground fault or short circuit may be suspected in case of:
 Blowing fuses (semiconductor fuses for the primary voltage supply in the electrical cabinet of the
machine tool or in a sub-distribution)
 Error messages, such as Leakage current in UV 1xx or Overcurrent cutoff
 Scorch marks and/or burnt smell
 Destroyed units
DANGER
Ground faults or short circuits have to be eliminated before further investigation is possible!
Note
For detailed descriptions on how to find ground faults/short circuits, refer to the
Service Manual ”Inverter Systems and Motors”.