This technical report contains guidelines regarding the maintenance on HIGH FREQUENCY SURGICAL EQUIPMENT, as defined in clause 3 below, to be performed by clinical engineering personnel. The application guidelines of this report deal with the maintenance of HIGH FREQUENCY SURGICAL EQUIPMENT constructed according to the safety requirements of IEC 601-1 and IEC 601-2-2 (see clause 2 below). Not all existing HIGH FREQUENCY SURGICAL EQUIPMENT meets the minimum requirements Of current International Standards; however, the guidelines in this report will still be helpful when maintaining these devices.