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6.2

Maintenance schedule

NOTICE
Operating defective devices
Operating defective devices may result in serious
consequential damage.
Do not repair or operate the device if it is damaged
Replace defective devices immediately or contact a
HEIDENHAIN service agency
Maintenance step
Check all labels and symbols
provided on the product for
readability
Inspect the electrical connec-
tions for damage and check
their function
Inspect the cover glasses, and
clean them if necessary
Compressed-air connections
44
Qualification
Interval
Electrical specialist
Annually
Electrical specialist
Annually
Operator
Daily
Operator
Annually
Corrective action
Contact a HEIDENHAIN service
agency
Replace defective cables. Contact
a HEIDENHAIN service agency if
required
Remove metal chips and contamina-
tion from the cover glasses
Check for proper connection and, if
necessary, attach them so that they
are fully engaged
HEIDENHAIN | VT 121 | Operating Instructions | 7/2020

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