An internal temperature sensor prevents the unit from overheating. The thermal sensor operates by removing volt-
age to the lamp if the ambient temperature exceeds the one allowed.
If the lamp turns off, let the fixture cool down, check that the air vents above the cooling fans are not obstructed
and that the fans are working correctly.
To ensure maximum functionality and light output it is recommended to follow these instructions:
10.1 Cleaning the unit
10.1.1 Lenses and reflector
The unit must be cleaned regularly. Cleaning regularity will depend especially on the environment where the unit
will operate: deposits of dust, smokes or other wastes will reduce the light output performances.
• Clean regularly the glass and the reflector of the unit.
• Be careful when cleaning the components. Operate in a clean, properly illuminated environment.
• Do not use solvents which could damage painted surfaces.
• Remove left particles by a cotton towel dampened with a glass-cleaning liquid or distilled water.
• Remove smoke and other wastes by a cotton towel dampened with isopropyl alcohol.
• Dry out by a clean, soft, non-scratching towel or by compressed air.
10.1.2 Fans and air passages
The fans and air passages must be cleaned approximately every 6 weeks; the period for this periodic cleaning will
depend, of course, upon the conditions in which the projector is operating. Suitable instruments for performing this
type of maintenance are a brush and a common vacuum cleaner or an air compressor.
10.2 Regular checks
• Check electrical connections, especially the ground wiring and the power supply cable.
• Check that the unit is not damaged mechanically. Replace those components which have got deteriorated.
10.2.1 Lamp
Replace any lamp that may present any damage or deformation.
We recommend, therefore, that the lamp be replaced within the manufacturer’s specified lamp life. The lamp
life counter needs to be reset to zero at every lamp change to provide accurate information on lamp life.
All components of the unit are available as spare parts at
Griven
dealers.
Exploded views, wiring diagrams, electronic layouts and advertising brochures are available on request.
To make the job of assistance centres easier, specify serial number and model of the unit which spare parts are
requested for.
9.0 Thermal protection
11.0 Spare parts
Attention!
Always remove mains power prior to opening up the fixture.
10.0 Maintenance
36
English
Содержание GR0399
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