SRI986 Electro-Pneumatic Positioner - webadmin1.net

30 SRI986 MI EVE0102 A-(en)11 TROUBLESHOOTINGFault Possible causes RemediesActuator does not reactPneumatic connections switched check connectionsto the applied input signal Electrical connections switchedreverse electrical connectionsnor to a changefeedback lever loosetighten feedback leverPositioner mounted on the wrong side check mounting side see table section 2.2.2changeover plate in the wrong position check position see table in section 2.2.2booster defective Change booster (see page 6)I-p converter defectiveSee note in section 5.3 and proceedaccordinglyOutput pressure does not reach full supply pressure too lowcheck suply airvalueflappers not parallel to nozzlesalign flappers(see 5.1 d, e bzw. 5.2 d, e)pre-throttle in booster blocked clean throttle (see 5.4)I-p converter defectivesee note in section 5.3 and proceedacordinglyfilter in supply connection blocked change filterActuator runs to the end position positioner mounted on wrong side check mounting side see table in section2.2.2feedback levertighten feedback leverPneumatic connections switched check connections(double-acting version)electrical connections switchedreverse electrical connectionsUnstable behavior -boost too high reduce boost (see 4.1)positioner circuit oscillates gland friction on valve too greatloosen gland slightly or renewfor piston actuators:reduce boost (see 4.1)static friction on cylinder too greatStroke range cannot be set range spring unsiutable change range spring (see 4.5 or 4.6)positioner does not exhaust pressurecompletelycheck supply air (max. 6 bar)check boost (see 4.1)adjust distance between nozzle and flapper(see 5.1 e, f bzw. 5.2 e, f)Detail: Nozzles/ flappers system59 60 40 66 60 59