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. Do not attempt to service this product yourself as opening or removing housing may expose you to dangerous voltage or other hazards . Keep the module away from liquids. . Spillage into the housing may result in fire, electrical shock, or equipment damage. If an object or liquid falls or spills on to the housing, unplug the module immediately. . Have the module checked by a qualified service engineer before using it again. . Do not use liquid or aerosol cleaners to clean this unit. Always unplu