Glow-worm Ultracom2 sxi - Maintenance; 15 Trouble-Shooting; Fault Diagnosis

0020112600_02-10/12-Glow-worm
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MAINTENANCE

Toensurethecontinuedefcientandsafeoperationofthe
boileritisrecommendedthatitischeckedandservicedat
regularintervals.Thefrequencyofservicingwilldependupon
theparticularinstallationandusage,butingeneralonceayear
shouldbeenough.
ItistheLawthatanyservicingiscarriedoutbya
approvedatthetimebytheHealthandSafety
Executive
• Beforecommencingwithaserviceorreplacementofparts
isolatetheboilerfromtheelectricalsupplyandturnoffthe
gassupplyatthegasisolationvalve.
• Whenreplacingapartonthisappliance,useonlyspare
partsthatyoucanbeassuredconformtothesafetyand
performancespecicationthatwerequire.Donotuse
reconditionedorcopypartsthathavenotbeenclearly
authorisedbyGlow-worm.
• Ifanyelectricalconnectionshavebeendisconnected
andaftertheirconnection,checkstotheearthcontinuity,
polarity,shortcircuitandresistancetoearthmustbe
repeatedusingasuitablemultimeter,asdescribedinchapter
"Trouble-shooting►Faultdiagnosis►Checktheelectrical
installation".
• Afterservicing,completetherelevantServiceIntervalRecord
sectionoftheBenchmarkChecklistlocatedinthisdocument.
 
 
Thefollowingchecksshouldbeperformedbeforeproceeding
ontospecicdiagnostics:
• Makesurethattheelectricitysupplyhasnotbeeninterrupted
andthattheapplianceisconnectedcorrectly(Seechapter
"Trouble-shooting►Faultdiagnosis►Checktheelectrical
installation")
• Checktheappliance’sgassupply(Seechapter"Trouble-
shooting►Faultdiagnosis►Checkthegassupply").
• Ensurethattheisolatingvalvesareopen.
• Ensurethatthepressureindicatordisplaysavalueof0.8bar
(ifthepressurefallsbelow0.4bar,theairventfunctionwill
runautomaticallyforaperiodof5minutesuntilyousee0.5
baronthepressureindicator).Ifnot,lltheappliance.
• Checkthatallexternalcontrolsareconnectedcorrectly.
• Ifthesymbol
andthemessage""aredisplayed
onthescreen,displaythefaultcodememory(seechapter"
Trouble-shooting►Faultmemory").
• Presstheresetbutton
torestarttheappliance.
• Checkthefunctionalowdiagram.
 
24
V
V
32
1
4

 
 
 
 
• Removethefrontcasingpanel
• Checktheexternalelectricalsupplytotheboilerisonanda
supplyof230Vispresentatthe‘L’and‘N’terminalsonthe
mainboard.
• Checktheelectricalinstallationandappliance,carryouttests
forearthcontinuity,polarity,shortcircuitandresistanceto
earth,usingasuitablemultimeter.
• Baremetalpointssuchasscrewsorrivetswillactassuitable
earthcheckpointsontheappliance.
 
1
2

 
 
• Checkthatthereisagassupplytotheboilerandthegas
serviceisolationvalveisturnedon.
• Checkpressureatthegasserviceisolationvalve.