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10 CLEANING AND MAINTENANCE
Disconnect from mains before starting maintenance operation!
DANGER TO LIFE!
The operator has to make sure that safety-relating and machine-technical installations are inspected by an
expert after every four years in the course of an acceptance test.
The operator has to make sure that safety-relating and machine-technical installations are inspected by a
skilled person once a year.
The following points have to be considered during the inspection:
1) All screws used for installing the speaker systems or parts of the speaker system have to be tightly
connected and must not be corroded.
2) There must not be any deformations on housings, fixations and installation spots (ceiling, suspension,
trussing).
3) The electric power supply cables must not show any damages, material fatigue (e.g. porous cables) or
sediments. Further instructions depending on the installation spot and usage have to be adhered by a
skilled installer and any safety problems have to be removed.
We recommend a frequent cleaning of the speaker-system. Please use a soft lint-free and moistened cloth.
Never use alcohol or solvents!
There are no serviceable parts inside the device except for the fuse, the rechargeable batteries and the
battery in the microphone. Maintenance and service operations are only to be carried out by authorized
dealers.
10.1 Storage and maintenance of rechargeable batteries
When the device is not in use for a longer period of time, the rechargeable batteries have to be charged
every month. Otherwise danger of permanent power loss or battery damage.
Remove batteries from the housing if the temperature is below -5° C! Otherwise danger of battery damage.
Always store rechargeable batteries in a warm enough, dry place where children cannot access.
When reinstalling the rechargeable batteries, make sure to connect the right poles of the connection cables.
If the Charging LED does not flash when connecting the device with the mains, the poles are wrong or a
battery is defective.
10.2 Loudspeakers
If the speaker system distorts, one of the loudspeakers may be defective. Test the speaker system once
more with another amplifier. If the sound remains distorted, the speaker system should not be operated any
more in order to prevent further damage. Please contact your dealer.
If clacking sounds are heard from the speaker-system, screws may have loosened due to the continuous
vibrations. The speaker system should be checked by a specialist. Especially for public use, the speaker
system should be checked before every operation so that the speaker system and the speakers in the
systems are always well fixed.
Should you need any spare parts, please use genuine parts.
If the power supply cable of this device becomes damaged, it has to be replaced by a special power supply
cable available at your dealer.
Should you have further questions, please contact your dealer.
