[. . . ] Unauth orised modifi ca tio ns on th e agitator exclude a liability of the manufacturer for damages of any kind resulting from it. Only persons who are familiarised with the device and informed about possible risks are allowed to prepare, operate and service this device. Repair works may only be carried out by us or by a customer service agent nominated by us. [. . . ] Residual risks can be minimised if the "Safety instructions" and the "Normal intended use" as well as the whole of the operating instructions are observed. Observing these instructions, and taking proper care, will reduce the risk of personal injury or damage to the equipment. Failure to observe the safety precautions can lead to injury to the operator or damage to property. Impairment of hearing when working on the machine for longer periods of time without ear protection. In addition, in spite of all the precautionary measures taken, non-obvious residual risks can still exist. Design of the connection cable according to IEC 60 245 (H 07 RN-F) with a core cross-section of at least 3 x 1. The motor does not reach any longer its maximal power; the function of the device is reduced. Plugs and coupler outlets on connection cables must be made of rubber, non-rigid PVC or other thermoplastic material of same mechanical stability or be covered with this material. When running the connection line observe that it does not interfere, is not squeezed, bended and the plug connection does not get wet. Regularly check the extension cables and replace them if they are damaged. Only hook up the machine by means of a fault-current circuit breaker (30 mA). The electrical connection or repairs to electrical parts of the machine must be carried out by a certified electrician or one of our customer service points. Repairs to other parts of the machine must be carried out by the manufacturer or one of his customer service points. Accidents can arise for the user through the use of other spare parts. [. . . ] Have the carbon brushes be replaced by the customer service if they are worn Regularly check the beater for damages for your own safety. Before each fault elimination: - switch off device - wait for standstill of the beater - pull out power plug After each fault clearance, put into operation and recheck all security installations. Check fuses (10 A) exchange defect cable, respectively check extension cable, (by electrician) Never use defect lead To correct the problem, refer to the manufac Motor or switch defect turer or other approved service centre. [. . . ]