HEIDENHAIN VT 121 Operating Instructions Manual page 45

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
HEIDENHAIN | VT 121 | Operating Instructions | 03/2022
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
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