Siemens LMV5 Series Basic Documentation

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251/278Siemens Building Technologies Basic Documentation LMV51... CC1P7550enHVAC Products 18 Addendum 4: LMV52... with O2 trim control and O2 module 01.10.200318.4 O2 trim control18.4.1 Operating modes of O 2 trim controller / O2 monitorThe O 2 trim controller or O 2 monitor can be deactivated or activated in variousoperating modes by setting a parameter.Parameter: O 2 Ctrl/Guard (man deact / O 2 -guard / O 2 -control /conAutoDeac / auto deact)man deact Both the O2 trim controller and O 2 monitor are deactivated. Thesystem operates along the parameterized ratio curves.The ratio curves must always be adjusted such that there aresufficient amounts of excess O 2 available , irrespective ofenvironmental conditions!O2-guard Only the O2 monitor is active. Prior to startup, the O2 sensor musthave reached its operating temperature. If not, startup will beprevented. If the O 2 monitor responds, or if an error occurs inconnection with O 2 measurement, the O 2 module or the O 2 sensor,safety shutdown will take place, followed by a repetition if possible,otherwise lockout.O2-control Both the O2 trim controller and the O 2 monitor are active. Prior tostartup, the O2 sensor must have reached its operating temperature.If not, startup will be prevented. If the O 2 monitor responds, or if anerror occurs in connection with O 2 measurement, the O 2 module orthe O 2 sensor, safety shutdown will take place, followed by arepetition if possible, otherwise lockout.conAutoDeac Both the O2 trim controller and the O2 monitor are active (option«automatic deactivation»). Startup takes place before the O2 sensorhas reached its operating temperature. O 2 trim control in operation isactivated only when the operating temperature has been reached andthe sensor test has been successfully completed. If the O 2 monitorresponds, or if an error occurs in connection with O 2 measurement,the O 2 module, the O 2 sensor or the sensor test, both the O 2 trimcontroller and the O 2 monitor will automatically be deactivated.The system operates along the parameterized ratio curves and thisparameter will be set to auto deact. The AZL5... indicates automaticdeactivation. The error code is maintained until O 2 trim control ismanually deactivated or activated.auto deact O 2 trim control has automatically been deactivated and the systemoperates along the parameterized ratio curves (do not select thissystem parameter). To deactivate the O 2 trim controller / O 2 monitor,use parameter setting «man deact».Also refer to subsection 18.4.4, Heating up the O2 sensor after «PowerOn».