Proceed PAV - Manual (Page 74)

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Care and Maintenance
To remove dust from the cabinet of the PAV, use a feather duster. To remove
dirt and fingerprints, we recommend isopropyl alcohol and a soft cloth.
Caution! Always apply the isopropyl alcohol to the soft cloth and then
wipe the PAV with the dampened cloth. Never pour or spray
even small amounts of any liquid directly on the PAV, as doing
so may allow the liquid to reach the circuitry inside the unit.
Any liquid inside the unit poses a hazard to both the user and
to the unit, and must be avoided.
Make sure that the Remote sensor window on the front panel and the Remote
Control’s projection lens are kept clean and dust-free.
Fluorescent lighting and sunlight may interfere with the operation of the Remote
Control. Avoid placing the PAV near fluorescent lamps or in direct sunlight.
When the Remote Control’s batteries need to be replaced, use only AA batteries;
always replace both batteries at the same time. If you don’t plan to use the Re-
mote Control often, remove the batteries. When not used for an extended period,
even “leakproof” batteries can leak corrosive acids that will damage the Remote
Control (and will void the warranty).