User Manual

DIR 1000587R0002 (L3821)
(31)
3.6 TroubleshootingLSIG-MMunits
Thefollowingtablelistsaseriesoftypicalserviceconditions,tohelpyouunderstandandsolvehypotheticalfaultsormalfunctions.
N.B.:
1. Beforeconsultingthefollowingtable,checkforanyerrormessagesappearingforsomesecondsonthedisplay.
2. FNindicatesnormaloperationoftherelease.
3. Whenthesuggestionsproposeddonotleadtoasolutionoftheproblem,pleasecontactABBSACEassistanceservice.
No. Situation Possible causes Suggestions
 1 Triptestcannotberun 1.Busbarcurrentis>0 1.FN
    2.TheTCisnotconnected 2.Checkmessagesonthedisplay
 2 Triptimeslower 1.Thresholdtoolow 1.Correctthreshold
  thanexpected 2.Curvetoolow 2.Correctcurve
    3.Thermalmemoryenabled 3.Excludeifnotnecessary
    4.Incorrectneutralselection 4.CorrectNeutralselection
 3 Triptimeshigher 1.Thresholdtoohigh 1.Correctthreshold
  thanexpected 2.Curvetoohigh 2.Correctcurve
    3.CurveI
2
tenabled 3.Excludeifnotnecessary
    4.Incorrectneutralselection 4.CorrectNeutralselection
 4 Rapidtrip,withI3=Off Iinsttripped FNshort-circuitwithhighI 
 5 Highearthfaultcurrentvalue, 1.Incorrectselectionofsensor 1.Setint.orext.sensor
  butnotriptakesplace 2.FunctionGpreventedwithI>4In 2.FN
 6 Displayoff  1NoVauxandcurrentand/or 1.FN,see3.1.2.1
    voltageisbelowtheminimumvalue.
    2.Temperatureoff-range 2.FN,see3.1.9.6
 7 Thedisplayisnotback-lit Currentand/orvoltagesbelowthe FN
  limitforlightingthedisplay
 8 ReadingofIincorrect Currentbelowtheminimum FN
  thresholdthatcanbedisplayed
 9 Message“” Functiondisabledordataoff-range FN
  insteadofexpecteddata
10 Expectedtripdoesnottakeplace Tripfunctiondisabled FNenabletripifnecessary
11 Noactivationofprotection ValuesofIoutofrange FN,see3.1.9.3
  UnbalanceU
12 Nodisplayof NoVaux,buffercapacitor FN,see3.4.6.1
  openingdata isdischarged
13 Thepasswordisnotrequested Thepasswordhasbeendisabled FN,re-enterthepasswordwithavalue
    otherthan0000 
14 Impossibletochangeany Releaseinanalarmsituation FN
  parameter
15 Message“Temp.Sensor”or Possiblefaultinsidetherelay ContactAB    
“Start-up”
18 InvalidDate 1.Firstinstallation FNsee3.3.3.
   2.Informationlostduetopower
 failure
19 Untimelytrip   see3.5.2
20 LEDlighting   see3.5.1
21 Nopossibilitytochange 1.Relayisremotelyset 1.Settolocal
language 2.TheCBisnotopen 2.OpenCB
 3.Vauxorbatteryunit 3.Powertherelay