Reliability/Safety actly follow the instructions given in the manual because wrong handling could lead to rendering measures against dangers ineffective or to creating additional dangers. 2.4.2 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 control- ler in a power-up condition. Ш Repairs must only be made by specially trained Kuhn- ke 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 In the case of modular systems: modules are to be dead when plugging or unplugging them. They may otherwise be destroyed or their functionality adversely af- fected, the latter without you necessarily noticing immedia- tely. Ш Dispose of any batteries and accumulators as hazar- dous waste. 16