ETC Irideon AR250, Instruction Manual, Page: 27 / 30

A thermal sensor in the body of the AR 250 protects the fixture against over heating.
The sensor operates by removing power to the lamp should the operating temperature exceed the factory preset. This may be due
to several factors, including the lack of circulation around the unit, high ambient temperature, or the malfunction of an on-board fan.
The sensor will reset itself once the temperature has returned to an acceptable level, and will continue to monitor the internal tem-
perature of the unit.
The 2 fans are controlled by a servo-control system. The main PCB provides power to the fans and keeps track of the fan blade
speed. If a discrepancy exists between the fan speed and the expected fan speed, the lamp will be automatically turned off after 5
seconds of incompatible signals.
In the case of fan malfunction, the display will show
FAER
, (fan error) after the lamp has been switched off. Should this occur, we
recommend that you open up the projector housing and clean the fans thoroughly, as this is generally the main cause of problems
in this area.
While every possible precaution has been taken to ensure the trouble-free operation of your AR 250 , the following periodic main-
tenance is highly recommended. Warning: We recommend that the voltage to the unit be removed prior to any maintenance pro-
cedure taking place.
Periodic cleaning
Even a fine layer of dust can reduce the luminous output substantially. Regularly clean all lenses, dichroic filters and the reflector
using a soft cotton cloth, dampened with a specialist lens cleaning solution.
Fans and air passages
The fans and air passages must be cleaned approximately every 6 weeks. Time between cleaning will vary due to the specific con-
ditions in which the projector is operating. Suitable tools for performing this type of maintenance are a brush and a common vacuum
cleaner or an air compressor.
The fans are located beside the lamp assembly.
Air intakes
The air intakes require regular cleaning to maximize the efficiency of the cooling system. These intakes should be cleaned approxi-
mately every 4 weeks. Time between cleaning will vary due to the specific conditions in which the projector is operating. Suitable
tools for performing this type of maintenance are a brush and a common vacuum cleaner or an air compressor. Should this not suf-
fice, it may be advisable to soak the intakes in a detergent solution.
Filters and dichroics
For a thorough cleaning of the filters and dichroic lenses, it may be best to refer the unit to trained technician, as they are located
internally to the unit.
Periodic maintenance
Lamp
The lamp should be replaced at the end of it’s rated life if there is any observable damage or deformation due to heat. This will avoid
the danger of non-passive end of life failure.
Mechanicals
Periodically check all mechanical devices for wear and tear, replacing them if necessary. Periodically check the lubrication of all com-
ponents, particularly the parts subject to high temperatures. If necessary, lubricate with suitable lubricant. It is strongly suggested the
use of an oil-based product rather than a greasy lubricant, to avoid the accumulation of dust and the consequent clogging of the
mechanisms. Also, make sure you run this maintenance routine regularly and thoroughly.
Electronic components
Check all electrical components for correct earthing and proper attachment of all connectors, refastening if necessary.
Replacing the fuse
To replace the fuse, it is necessary to remove the rear housing, as previously described in this manual. Use a multimeter to check the
fuse, replacing any faulty or damaged fuses with ones of equal value, dimensions and characteristics. These are described on the
adjacent sticker.
115VAC units--Fuse 5Amp T (Time Delay) 250VAC 2x20mm Ceramic.
230VAC units--Fuse 8Amp T (Time Delay) 115VAC 5x20mm Ceramic.
Attention!
Once maintenance has been completed, ensure that all seals are replaced correctly when refitting the housing.
Failure to do so will result in the unit not maintaining it’s protection rating and may result in damage occurring.
Attention
The housing may be opened as described in section 4
22. Maintenance
21. Servo-controlled fans
20. Thermal protection
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