CHAPTER 10 – PREVENTIVE AND CORRECTIVE MAINTENANCE 172
10.6.7 Service covers
The service covers on the back of the cabinet do
(10-12) not have to be removed for servicing the
drive. All components inside the cabinet are acces-
sible through the front of the cabinet.
10.6.8 Visual checks on the drive
Check the drive and its immediate vicinity visually
at the intervals stated on the maintenance sched-
ule and pay attention to the following items:
• Humidity inside the drive
• Permitted range of ambient air temperature
and humidity of the drive
• Dust built-up inside the drive
• Appropriate fastening of cables and wires and
connections of cable shields and screens
• Integrity of cable insulation
• Signs for overheated components, wires, cables
or busbars
• Corrosion on electronic circuit boards, connec-
tors or busbars
• Correct type of signal and power supply cables
10.6.9 Cleaning
When cleaning the drive cabinet, mind the follow-
ing:
• To prevent dirt falling into equipment, cover the
equipment.
• The drive contains components which are sensi-
tive to electrostatic discharge. Therefore, take
electrostatic-sensitive precautions and use
suitable tools.
Clean circuit boards with special care. To pre-
vent the components being damaged, use anti-
static brushes and a vacuum cleaner with a soft
nozzle.
• Remove dust on assemblies and busbars inside
the cabinet with a vacuum cleaner and lint-free
cleaning cloths.
• Remove water, oily or greasy deposits on
assemblies, components and busbars with
water- and oil-absorbing microfibers such as
"3M Scotch Brite".
• Use a nylon brush or a vacuum cleaner for
removing dust or deposits from recesses.
• Clean the outside of the cabinet with a vacuum
cleaner and cleaning cloths.
High temperature!
Components inside the drive can be hot.
Before taking off a service cover on the back of the
cabinet, wait until the fan has stopped. To cool
down the components, the fan continuous to run
for a preset time after the main power supply has
been switched off.
For information, see the applicable cable
specifications.
Risk of component damage!
• Dust on electrical components and wiring can
cause failure and damage the components.
Dust and moisture can build up in loose
connections and cause loss of low-level signals.
Check the cabinet regularly for signs of dust and
humidity and clean if necessary.
• Alcohol and solvents can damage the
components.
Use appropriate and recommended cleansing
agents.
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