Carrier 59TN6A - Service; Troubleshooting; Retrieving Stored Fault Codes

SERVICE
.......... Ifsta_scodereceiisnaededd_ned _ 'R"_ lead,reseti:x:,,_,_,andputsebpswitch"SWI-1"
in_eONposi_::_.Todearfnastatuscodehisto._/putse_ sv,_ch"SWl-l"in_naON_ andju_
_t terminals"R",'WNV1",and'Y/Y2'sJ_l_aneouslyun_]sta_scode#11is_shed.
LED CODE STATUS
CONTINUOUS OFF - Checkfor115VACatL1andL2,and24VACatSEC-landSEC-2.
CONTINUOUS ON- C,X_ntrolhas24VAC_.
_P|D FLASHING Unevoltage(115VAC)polarityisreversed.
EACHOFTHEFOLLOWINGSTATUSCODESISASINGLEORTWODIGITNUMBERWITHTHEFIRSTNUMBERDETERMINEDBYTHE
NUMBEROFSHORTFLASHESANDTHESECONDNUMBERAFTERTHEPLUS(+)SIGNISTHENUMBEROFLONGFLASHES,
11 NOPREVIOUSCODE.Storedstatuscodesareerasedautomaticallyafter72hoursorasspecifiedabove,
12 BLOWERONAFTERPOWERUP.(115VACor24VAC)-Blowerrunsfor90seconds,ifunitispoweredupduringa
callforheat(R.W/W1closed)or(R.W/W1opens)duringtheblowerondelayperiod,
13 LIMITCIRCUITLOCKOUT.Lockoutoccursifthelimit,orflamerolloutswitchisopenlongerthan3minutesor
10successivelimittripsoccurredduringhigh-heat,Controlwillautoresetafter3hours,Refertostatuscode#33,
14 IGNITIONLOCKOUT.Controlwillauto-resetafter3hours,Refertostatuscode#34,
15 BLOWERMOTORLOCKOUT.Indicatestheblowerfailedtoreach250RPMortheblowerfailedtocommunicatewithin30
secondsafterbeingturnedONintwosuccessiveheatingcycles,Controlwillautoresetafter3hours,Refertostatuscode#41,
21 GASHEATINGLOCKOUT.ControlwillNOTautoreset,Checkfor:-Mis-wiredgasvalve,-Defectivecontrol(valverelay)
22 ABNORMALFLAME.PROVINGSIGNAL.Flameisprovedwhilegasvalveisde.energized,Inducerwillrununtilfault
iscleared,Checkfor: -Leakygasvalve, - Stuck.opengasvalve,
23 PRESSURESWITCHDIDNOTOPEN-Checkfor:-Obstructedpressuretubing,-Pressureswitchstuckclosed,
24 SECONDARYMOLTAGEFUBEISOPEN-Checkfor:-Shortcircuifinsecondaryvoltage(24VAC)widng,
25 MODELSELECTIONORSETUPERROR-Eitherindicatesthemodelplug(PL4)ismissingorincorrectorsetupswitch
"SW1.1"or"SWl-6"ispositionedimproperly,Ifcodeflashesonly4timesonpower-upcontrolisdefaultingtomodelselection
storedinmemory,Checkthefollowing:-Thermostatcallwith"SWl-I"ON, -Thermostatcallwith°SW1-6"OH,
-°SWI-I"and"SWl-6"bothONtogether, -Twodifferentfurnacemodelstwinned,
-SeeRatingPlateformodelplugnumberandresistancevaluesifcodeflashescontinuously,
31 HIGH.HEATPRESSURESWITCHORRELAYDIDNOTCLOSEORREOPENED• Indicatesthehigh-heatpressureswitch
inputfailedtocloseoropenedduringhigh-heat,Controlrelaymaybedefectiveorgasvalveismis-wired,Refertostatus
code#32,
32 LOW.HEATPRESSURESWffOHDIDNOTCLOSEORREOPENED.Indicatesthelow-heatpressureswitchinputfailedto
closeonacallforlow-heat,oropenedduringlow-heat,Ifopensduring5minutesafterignitionthenextheatingcyclewillbe
restrictedtohigh-heat,Checkfor: - Properventsizing, -Excessivewind, -Pluggedcondensatedrain,
-Lowinletgaspressure(ifLGPSused), -Restrictedcombustionairsupply, -Improperpressureswitchwiring,
-Waterinventpiping,possiblesaggingpipe. -Disconnectedorobstructedpressuretubing.
-Failedor"Out.d-Calibration"pressureswitches.
33 LIMITCIRCUITFAULT.Indicatesthelimit,orflamerolloutisopenorthefurnaceisoperatinginhigh-heatonlymodedueto
2successivelowheatlimittrips.Blowerwillrunfor4minutesoruntilopenswitchremakeswhicheverislonger.Ifopen
longerthan3minutes,codechangestolockout#13.Ifopenlessthan3minutesstatuscode#33continuestoflashuntil
blowershutsoff.Flamerolloutswitchrequiresmanualreset.Checkfor:.Improperlimitswflchornolimitgasket
-Defectiveswitchorconnections. -Looseblowerwheel.
-Improperlow-heatorhigh-heatgasinputadjustment. -Stuckhigh-heatsolenoidingasvalve.
34 IGNfflONPROVINGFAULT.Oontrolwilltrythreemoretimesbeforealockout#14occurs.Ifflamesignalislostduringblower
on-delaypedod,blowerwillcomeonfortheselectedbloweroff-delay.Checkfor: -Gasvalvedefectiveorturned"OFF".
-DefectiveHotBur[aceIgniter.-Manualvalveshut.off. -Lowinletgaspressure.-Flamesensormustnotbegrounded.
-Controlgroundcontinuity.-Inadequateflamecarryoverorroughignition.
-Green/YellowwireMUSTbeconnectedtofurnacesheetmetal.-Oxidebuilduponflamesensor(cleanwithfinesteelwool).
-Properflamesensemicroamps(.5microampsDOTin,4.0-6.0nominal).
41 BLOWERMOTORFAULT.Indicatestheblowerfailedtoreach250RPMortheblowerfailedtocommunicatewithin
theprescribedtimelimits.ThirtysecondsafterbeingturnedONortensecondsduringsteady-stateoperation.
43 LOW,HEATPRESSURESWITCHOPENWHILEHIGH.HEATPRESSURESWITCHISCLOSED,Checkfor:
-Pluggedcondensatedrain,-Lowinletgaspressure(ifLGPSused), -Waterinventpiping,possiblysaggingpipe,
-Improperpressureswitchwiring, -Stuckopenlow-heatpressureswitch,-Disconnectedorobstructedpressuretubing,
45 CONTROLCIRCUITRYLOCKOUT-Auto-resetafterlhourlockoutdueto:-Flamesensecircuitfailure,
-Gasvalverelaystuckopen, -Softwarecheckerror,
Resetpowertoclearlockout,Replacecontrolifstatuscoderepeats,
_1 CONPONENT TEST
Toinitiatethecomponenttestsequence,shut"OFF"theroomthermostatordisconnectthe"R"thermostat
lead.Resetpowerandthenputsetupswitch"SW1-6"intheONpositiontostartthecomponenttest
sequence.OnceinitiatedthefurnacecontrolwillturntheinducerON.Theinducermotorwillrunforthe
entiretest.ThehotsurfaceigniterandblowermotorwillbeturnedONfor15secondseach.Whenthe
bloweristurnedOFFtheinducerwillbeturnedOFF.Whenthecomponenttestiscompletedoneormore
ofthefollowingcodeswillflash.
CODE DESCRIPTION
11 IndicatesblowermotortestedOK,Visualcheckofhotsurfaceigniterandinducerrequired,
.... 25SETUPERROR-Sameascode25above,
418LOWERMOTORFAULT-Indicatesblowermotorfailedtest,Checkblower,wiring,andfurnacecontrol,
.... Torepeatcomponenttestturnsetupswitch"SW1-6"OFFandthenbackON,Aftercomponenttestis
.... completedputsetupswitch"SW1-6"intheOFFpositionendreconnectthe"R"thermostatlead.
338308-201Re_ E
Fig. 54 - Service Label Information
A11596
dd