Specifications

TroubleshootingGuide
14|Page
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3) Verifythatthegassupplypressureiswithinspecificationswhentheheaterisinstandbyandwhen
theheaterisrunning.
4) Checkthattheclearplastictubeconnectingtheproportionalgasvalvetothecombustionchamber
isattached.
5) Theoverheatcutofffuse(OHCF)mayhavebeencompromised.For
proceduresonhowtocheck
whethertheOHCFisintact,refertop.25.IftheOHCFhasbeencompromised,contactthetechnical
servicedepartmentforfurtherassistance.
6) Ifflamecomesonforonly1‐2secondsbeforegoingout,cleantheflamesensor(p.26).
7) Checkthe
igniterforaspark.Thesparkmaybeviewedthroughthesightglasslocatednexttothe
igniterandflamesensor.

a. Astrongbluesparkwillremainsteadyandinplace,whileaweaksparkwilljumparound.
b. Ifnosparkoraweaksparkisobserved,checktheigniterwireconnectionsandmakesurethese
aresecure.Ifthesearesecure,areplacementigniterwillberequired.
8)
Checkforblockagesintheventing,suchasbirdnests,animals,ortrash.
a. PCBoardfaultorGasSolenoidfault.Contactthetechnicalservicedepartment.

ERRORCODE121:FLAMELOSS
Thiserrorcodeappearsiftheflamesdisappear whiletheunitisstillsupposedtobeinoperation. 
1) Verifythatthehi‐limitswitchisnottripped.Turnthepowerofftotheunit.Pushthewhitebutton
in.Theswitchwillresetwhenyouhearandfeelthebutton
click.Turnthepowerbackonandtest
theheater.Iftheunitfireson,thecauseofthehi‐limittripmustbedetermined.Pleasecontactthe
technicalservicedepartmentforfurthertechnicalsupport.
2) Checkthegassupply.Verifythatsufficientgasisbeingsuppliedtotheheater
andthegaslineis
clearedofdebris.
a. Itispossiblethereisafaultypressureregulatoratthegasmeter.
b. Forpropaneunits,colderperiodsofthedayresultinacoldregulatorandmaycausethis
problem.
3) Verifythatthegassupplypressureiswithinspecifications
whentheheaterisinstandbyandwhen
theheaterisrunning.
4) Checkthattheclearplastictubeconnectingthe
proportionalgasvalvetothecombustionchamber is 
attached.
5) Iftheflamecomesonfor1‐2secondsbutthengoes
out,cleantheflamesensor(p.27).
6) Theoverheatcutofffusemayhavebeencompromised.
ForproceduresonhowtocheckwhethertheOHCFis
intact,refertop.25.Ifithas,contactthetechnical
servicedepartmentforfurtherassistance.
7) Checkforblockagesinventing,suchasbirdnests,
animals,ortrash.
8) PCBoard
faultorGasSolenoidfault.
a. Ifoneoftheseissuspectedtobetheproblem,
contactthetechnicalservicedepartment. 

Figure7
Clearpressurehose
connection