GLP German Light Products GmbH (Instruction version: 1.1) / from software version: V1.09 16Locking and unlocking the Control PanelPlease lock and unlock the control panel by pressing the menu keys MODE & ENTER & UP at thesame time.Additional Display IndicationsAs a default you'll find the following additional information in the first row of the LCD display:Vxx/xx/xx/xx/x (e.g. V1.09/10/16/NN/NS)NS ( DMX Mode = Normal / Dimmer Mode = Soft)NN ( Pan Mode =Normal; Tilt Mode = Normal)16 = Pan/ Tilt Driver Version10 LED driver version1.09 Main CPU version55 Maintaining and Cleaning the IIMMPPRREESSSSIIOONN XX44SSThe IIMMPPRREESSSSIIOONN XX44SS is a fixture of very low maintenance. It is only necessary toclean the air inlets and outlets as well as the optical LED lenses from time to time.For safe operation it is absolutely essential that the fixture is kept clean and that dust,dirt and smoke-fluid residues must not build up on, or within the fixture. Otherwise thefixture's light-output will be significantly reduced or damages can occur. Regularcleaning will not only ensure the maximum light-output, but will also allow the fixtureto operate reliably throughout its life.A soft lint-free cloth moistened with any good glass cleaning fluid is recom-mended, under no circumstances should alcohol or solvents be used!5.1 Safety regulations• Pull out the mains power plug!• Wait min. 15 minutes after disconnecting power to allow the fixture to cooldown.5.2 Maintenance and Interval (rule-of-thumb)The contamination of the fixture depends on the environment details. Hence nogeneral guidelines can be given. The intervals given below are only suggestionsfrom our experience.Position Interval In this wayLED reflector and optical system weekly soft brush /lint-free clothFan and air channel monthly vacuum cleaner, airbrush, etc.