2006 Lexus LS 430 Navigation Manual - Page 190

190 AIR CONDITIONING The gray surface in the filter may turn to yellow (yellow spots) because of ultraviolet rays included in the light, however it is no problem for use. When the ignition switch is turned on, the xenon tube comes on even if the rear air conditioning or rear fan is not operating. This does not indicate a malfunction but is required for the long use of the photocatalyst. NOTICE D Do not look into the xenon tube in the air purifier through the filter slot and do not expose your skin directly to the light in the xenon tube also. Although the xenon tube scarcely issues less than 300nm ultraviolet rays which are thought harmful for the human body, some people may have symptoms such as eye sore, vision trouble, skin inflammation, etc. D Do not disassemble the air purifier, or it may cause a malfunction. As some part in the purifier is under high voltage, you may get an electric shock when you touch it. D The filters should be installed properly in position. The use of rear air conditioning controls with the filter removed may cause the malfunction of the rear air conditioning controls. D Turn on the air conditioning with a filter in position. The activation without an filter may not only cause a malfunction of the system but also dirty the interior by spouting dust.