Reliability, Safety To achieve a high degree of conceptual safety in planning and installing an electronic controller it is essential to exactly follow the instructions given in the manual because wrong handling could lead to rendering measures against dangers ineffective or to creating additional dangers. 2.5.8 Observe during maintenance or servicing Ш Precautions regulation VBG 4.0 must be observed, and section 8 (Admissible deviations during working on parts) in particular, when measuring or checking a controller in a power-up condition. Ш Repairs must only be made by specially trained Kuhnke staff (usually in the main factory in Malente). Warranty expires in every other case.
Ш Spare parts: Ш Only use parts approved of by Kuhnke. Only genuine Kuhnke modules must be used in modular controllers. Ш Modular systems: always plug or unplug modules in a power-down state. You might otherwise damage the modules or (possibly not immediately recognisably!) inhibit their functionality. Ш Always dispose of any batteries and accumulators as hazardous waste. 12