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User Manual - Page 21

For F102594XL.

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21
Operating Instructions and Owner’s ManualMr. Heater Series Heater
SECTION 9: Troubleshooting Guide. Mr. Heater
START
Turnonthermostat
Doesblowerturn
on?
Yes
Doestheigniter
warmupandglow
red?
Yes
No
CheckThermostat
andWiring.Isthe
powersupplytounit
115V?
No
Findthesource
oftheelectrical
problem
CheckLEDindicatoronSmartValvefor
indicationoffault.RefertoSmartValvetesting
onpage20todetermineproblem.
No
Istheairintakeor
exhaustblocked?
Yes
RemoveObstruction
Checkwiringand
connections
No
Istheignitor
damaged?
No
Checkvoltageat
ignitor.Isit115V
duringignition
cycle?
Yes
Isblowersidedoor
inplace?
No
Replacedoor
No
Checkwiringand
hoseconnectionto
airswitch.Arethey
OK?
Yes
Isthevoltageat
thetransformer
secondary24V?
No
Isthevoltageatthe
transformerprimary
115 V
Replaceignitor.
Yes
No
Istheresistance
throughigniter40
to75ohms?
Removedoor.Is
voltageatdoor
switch115V?
Yes
No
Checkvoltageat
gasvalve.
Checkfor115VtransformerinputatplugC3
onSmartValve.Checkfor115Voutputof
C3.Ifnooutputvoltageispresentreplace
SmartValve.
Replacewiringand/
orhoseconnection.
No
Jumperwiresat
pressureswitch.
Doestheignitor
glowred?
Yes
ReplacetransformerYes
Checkwire
connections.
Yes
Depressswitch.
Doesblowercome
on?
Yes
Yes
No
Checkvoltageto
motor.Isit115V?
Yes
Istheblowerfan
obstructed?
No
Replaceblower
motor.
Replacepressure
switch.
Yes
ReplaceSmartValve.
No
CheckLEDindicatoronSmartValvefor
indicationoffault.RefertoSmartValvetesting
onpage21todetermineproblem.
Checkdoorfit.If
damaged,replace
door.
Replaceswitch.
No
Removeobstruction
Yes
Afterignitorwarm-
upperiod,doesthe
valveclick?
Yes
Doestheburner
light?
Yes
Doestheburner
stayon?
Yes
Doestheburner
rununtilthecall
forheatends?
Ifaproblemstillexists,contactMr.Heater,IncTechnicalProductsCustomer
Service1-866-447-2194
No
TheSmartValvechecksthestatusoftheblowerprovingswitchcontactsmustseeachangeinthe
contactwitheveryfiringcycle.Placingajumperattheswitchoutofsequencewillresultinafaultwith
theLEDindicatorflashingtwotimes.
Werethegaslinespurgedofair?
No
No
Yes
Checkinletgaspressure.Ispressurecorrect?
Refertopage40forcorrectpressureforunit.
Yes
Checkinletgasshutoff.Adjustregulator.
Contactgassupplier
Isthecontinuityof
thegroundwire
OK?
No
Theswitchonthegasvalvemustbeintheon
positionandthelinepurgedofair.
No
Repairwiring.
No
Checkthecontinuityofthegroundwire.
Checkthethermostat.
Checkoutletgaspressureduringignitioncycle.
Isthepressure3.5”w.c.fornaturalor10.5”
w.c.forlp?
Yes
Adjusttoproperpressure.
No
AreL1andL2
reversed?
Yes
Yes
Repairwiring
Isthewiringatthe
SmartValveOK?
No
Repairwiring
Istheinsulationon
thesensorleadOK?
No
Repairwiring
No
Yes
Yes
Arethewiresto
theSmartValveOK?
Yes
ReplaceSmartValve
No
Replace/repairwires.
Yes
Checkforproper
burnerorificeand
airplate.
Isthesensor
positioned
properly?
Yes
Isthesensordirty?
No
ReplaceSensor
No
Repair/Replace
Yes
Cleansensor.
Afaultindicationofsixflashesmayindicate
thattheflamesensingcircuitisnotfunctioning
properly.Performthefollowingseriesofchecks
tocorrecttheproblem.
No
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