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Chapter 9 - Preventive Maintainance
DCS 500 / DCS 600 Service Manual
VI A
9 - 1
WARNING!
Before performing any maintenance the chapter
‘Safety Instructions’ at the beginning of this manual and within the
corresponding
Operating Instructions must be followed. Negli-
gence of these instructions can cause injury or death.
Recommended
regular maintenance
The DCS requires very little maintenance if installed in an appro-
priate environment.
An annual check for dust accumulation and corrosion inside the
module / cabinet is recommended.
Air Filters
When air filters are used, the filters should be checked regularly
depending on environmental conditions. Clocked up filters pre-
vent the proper cooling of the drive.
Wash dirty filters with water (60°C) and detergent.
Cooling air pres-
sure switch in
converter mod-
ules type C4
The cooling air pressure switch must be checked regularly.
The following actions have to take place:
-
Make sure electrical safety is performed.
-
Open the module's door and hold it in position to prevent any
movement.
-
Repeat it with the cabinet’s door.
-
Switch on the drive and try to turn the motor.
-
The air pressure switch is ok when the converter is switched
off by error “F50 NO C FAN”; crosscheck this result with the
module’s door closed.
Fan
The lifetime of the cooling fan is about 20.000 to 40.000 hours
depending on the converter type. The actual lifetime depends on
the usage of the DCS and the ambient temperature.
Fan failure can be predicted by means of increasing noise from
its bearings and a gradual rise of the heatsink temperature. If the
DCS operates in a critical part of the process it is recommended
to replace the fan once the above mentioned symptoms appear.
Heatsink
The DCS will run into overtemperature faults if the heatsinks are
not clean. In an appropriate environment the heatsinks should be
checked and cleaned annually.
Use compressed air to remove the dust from the heatsinks (the
air flow must be from bottom to top). Fan rotation caused by the
compressed air must be stopped in order to prevent damage.
Additionally use a vacuum cleaner to clean the dust from the air
inlet and outlet.
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