The manufacturer cannot be held liable for failure to comply with the instructions in this manual. Any work on the product must be carried out by a qualified person. Replacement of the product must be carried out by a qualified person. The device must be used in accordance with the specifications in this manual. Failure to do so may result in danger. No part of the device may be replaced or removed. Switch off all power supplies before working on this device. Only accessories conforming to the specifications in this documentation may be used (current clamps and cables).