Vario L3
Maintenance
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Maintenance
On a regular basis the inside of the VARIO L3 should be cleaned out to prevent dust build up which could
eventually lead to obstruction of the convection airflow within the unit and prevent efficient operation.
Generally the enclosure design and the wiring layout will ensure that the cooling is stable. However, bear in
mind that any modifications to the installation may cause a restriction of the air vents.
After a period of several years, it may be necessary to replace the battery on the processor board, if it cannot
maintain the CMOS memory whilst the AC power is disconnected.
Replacing the Battery
The processor board includes a small 3V lithium battery (type CR-2032) to retain the BIOS settings in the
CMOS memory. Before attempting to replace the battery, please read the precautions detailed in the
introductory section. Remember that even discharged batteries can present a real personnel hazard if mistreated.
Do NOT under any circumstances try to remove the battery with metallic tools (pliers, tweezers etc.). They may
short out the battery with possible disastrous results.
Replace the battery by one of the same type, and check that the clip is fully engaged. When the battery has been
replaced, the BIOS settings will revert to their default settings. Reset them as necessary to suit your application.
Fuses
There are no user-serviceable or replaceable fuses within the unit.
