User guide

Vario L2 Maintenance
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Maintenance
On a regular basis the inside of the VARIO L2 unit should be cleaned out to prevent dust build up which could
eventually clog the fans and prevent efficient operation. If the optional Fan Filter is fitted, then this should be
checked on a regular basis and cleaned or replaced as required.
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 Processor 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.
The battery is located on the motherboard in the bottom right hand corner as shown in Picture 5.
Do NOT under any circumstances try to remove the battery with metallic tools (pliers, tweezers etc.).
They will short out the battery with possible disastrous results. Replace the battery by one of the same type,
ensuring that it is fitted with the positive terminal facing the CPU, and 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.
CAUTION
Danger of explosion if battery is incorrectly replaced. Replace
only with the same or equivalent type recommended by the
manufacturer. Dispose of used batteries according to the
manufacturer's instruction.
ATTENTION
Il y a danger d'explosion s'il y a remplacement incorrect de la
batterie. Remplacer uniquement avec une batterie du même type
ou d'un type recommandé par le constructeur. Mettre au rébut les
batteries usagées conformément aus instructions du fabricant.