Safety Related System Characteristics; Response In Operation And Fault Conditions - nVent Raychem NGC-20-C-E Installations-, Betriebs- Und Wartungsanleitung

4.6.4 Safety related system characteristics

The failure types of; sensor break, sensor short, sensor misconnected and random hardware failure are permanently monitored.

4.6.5 Response in operation and fault conditions

The response in operation and fault conditions is described in the operating manual. The necessary functional tests are described in
paragraph 4.5.3 of this operating manual. The test to be applied in a fault condition is described in paragraph 4.5.2 of this operating
manual. A functional test must be carried out after commissioning, repair to the safety system, or an alteration of safety-related
parameters. If a fault is detected in the course of a functional test, then measures must be implemented to restore the reliable
functionality of the safety system. This can, for instance, be achieved through replacement of the control unit. It is recommended that
the tests that have been carried out are all appropriately documented.
IMPORTANT NOTICE
In case a failure of the safety system is detected either during operation or during routine maintenance when executing a function
test the unit should be switched off and taken out of service. Defects in the safety system cannot be repaired in the field. Defective
units are to be replaced and returned to the manufacturer for investigation. Please contact your nearest nVent representative for more
instructions. A list of worldwide representations can be found on the last page of this document or on nvent.com
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