[. . . ] The machine production year is written in the declaration of conformity and it is also indicated by the first two figures of the machine serial number. Use the following table to write down the machine identification data. ­ ­ Spare Parts List (supplied with the machine) Service Manual (that can be consulted at Nilfisk Service Centers) All necessary operating, maintenance and repair procedures must be performed by qualified personnel or by Nilfisk Service Centers. Contact Nilfisk for service or to order spare parts and accessories, specifying the machine model and serial number. [. . . ] ­ Take all necessary precautions to prevent hair, jewels and loose clothes from being caught by the machine ­ moving parts. Do not leave the machine unattended without being sure that it cannot move independently. ­ Do not use the machine on slopes with a gradient exceeding the specifications. ­ While using this machine, take care not to cause damage to people or objects. ­ Do not bump into furniture, shelves or scaffoldings, especially where there is a risk of falling objects. ­ The machine working temperature must be between 0°C and +40°C. ­ The machine storage temperature must be between 0°C and +40°C. ­ ­ Do not use the machine on slopes with a gradient exceeding the specifications. ­ Do not allow the brush/pad to operate while the machine is stationary to avoid damaging the floor. ­ In case of fire, use a powder fire extinguisher, not a water one. ­ Do not tamper with the machine safety guards and follow the ordinary maintenance instructions scrupulously. Always keep the openings free from dust, hairs and any other foreign material which could reduce the air flow. ­ ­ Pay attention during machine transportation when temperature is below freezing point. The water in the recovery tank or in the hoses could freeze and seriously damage the machine. Use brushes and pads supplied with the machine and those specified in the User Manual. In case of machine malfunctions , ensure that these are not due to lack of maintenance. If necessary, request assistance from the authorised personnel or from an authorised Service Center. Has been left outdoors exposed to bad weather conditions · Is wet or has been dropped into water turn it off immediately and contact the Nilfisk Service Center or a qualified technician. If parts must be replaced, require ORIGINAL spare parts from an Authorised Dealer or Retailer. ­ To ensure machine proper and safe operation, the scheduled maintenance shown in the relevant chapter of ­ this Manual, must be performed by the authorised personnel or by an authorised Service Center. ­ Carefully read all the instructions before performing any maintenance/repair procedure. ­ Do not wash the machine with direct or pressurised water jets, or with corrosive substances. [. . . ] If necessary replace the gasket (C) by removing it from its housing (A). Make sure that the power supply cable (10) is disconnected from the electrical mains. 4), carefully remove the hose from the tank and clean the filter (B) with water. Possible Cause The power supply cable (10) is faulty or disconnected from the electrical mains. [. . . ]