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Carrier 58MEC instruction manual Troubleshooting Guide - Two-Stage, A05111

Models: 58MEC

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TROUBLESHOOTING GUIDE — TWO-STAGE

TROUBLESHOOTING GUIDE — TWO-STAGE

	NO
START.			circuit	toSTART.
Closedoorswitchandgobackto	Iscircuitbreakerclosed?	YES	Checkforcontinuityinwirefrom breakertofurnace.	Closecircuitbreakerandgoback
NO	NO

	Isdoorswitchclosed?	YES	switch?	YES
	Isdoorswitchclosed?		Isthere115Vgoingto		Replacedoorswitch.	Replacetransformer.		REDwirefromthe code. OnREDLED
	L2?andL1at115VthereIs	YES	NO and1-SECat24VthereIsSEC-2?	YES	control.furnaceReplace	voltagelinecorrectforCheckpolarityand twinned,areunitsIfgrounding.checkforproper transformer(24V)voltage-low phasing.		brieflycodestatusrecallToremoveandreconnectone rolloutflameorswitchlimitswitchtodisplaystoredstatus
	NO
	NO					YES		NO
START	IsLEDstatuslighton?	YES				IsLEDstatuslightblinkingrapidly withoutapause?	NO	IsLEDstatuslightblinkingON/OFFslowly

		Checkroomthermostator interconnectingcable.	NO	Is24VpresentatW/W1,W2,Y1,Y/Y2orG thermostatterminalsonthefurnacecontrol?	YES	Disconnectallthethermostatwiresfromthe furnacecontrol.	Doestheproblemrepeatwhenusinga jumperwire?	NO	Thethermostatisnotcompatiblewiththe furnacecontrol.Eitherinstallaballastresistor, connecttheCom24Vthermostatterminalto thethermostat,orreplacethethermostat.
panelaccessblowerorpowerremovenotdocontrolbeforeinitiatingstatus codestatusprevioustherecallalsocanYourecall.codebymomentarily terminalCom24VtoterminalTEST/TWINtheshortinguntiltheLEDgoesout. statusorcodeprevioustheofstatustheflashwillLEDcode#11(1shortand theAftercode.previousnowasthereifflash)long1controlrepeatsthecode		sequence.testcomponentthestartwillcontrolthetimes,4 Onceinitiated inducerThespeed.HEATHIatONturnwillcontrolthewillrunfortheentire speed,HEATLOmotorblowerHSI,Thetest.componentHIHEATspeed,and Gaseach.seconds15–10forrunwillspeedCOOLvalveandhumidifierwill OFFturnedismotorblowertheWhenon.turnedbenot theinducerwillbe seconds.10forspeed-lowtoswitched		NO		Runsystemthroughalow-heat,high-heat, orcoolingcycletocheckoperation. Status codesareerasedafter72hours. OnRED LEDboardsstoredstatuscodescanalsobe erasedwhenever(115Vor24V)isinterrupted.	YES
				othercodestatuspreviousathereWas #11?than	YES		Replacefurnacecontrol.
				Y1,W2,W/W1,torespondcontrolthe signals?thermostat(24V)Gand
				Does Y/Y2,
				NO
				YES
withacombinationofshortandlongflashes?	YES	Determinestatuscode. Thestatuscodeisa 2digitnumberwiththefirstdigitdetermined bythenumberofshortflashesandthesecond digitbythenumberoflongflashes?		Gotosectionbelowforthestatuscodethat wasflashed.

A05111

A05095

58MEC

17

Image 17

Carrier 58MEC instruction manual Troubleshooting Guide - Two-Stage, A05111

Contents

SAFETY CONSIDERATIONS TABLE OF CONTENTSELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD FIRE OR EXPLOSION HAZARDGENERAL ELECTROSTATIC DISCHARGE ESD PRECAUTIONSUNIT DAMAGE HAZARD Fig. 1 -- Multipoise Furnace in Upflow OrientationStep 1 - Cleaning and/or Replacing Air Filter CARE AND MAINTENANCEStep 2 - Blower Motor and Wheel Maintenance 58MECTable 1 - Furnace Air Filter Table Fig. 4 - Filter Installed for Side InletTable 2 - Air Filter Located in Filter Cabinet Fig. 3 - Bottom Filter ArrangementFig. 5 - Factory-Shipped Upflow Tube Configuration Step 3 - Cleaning BurnersShown with Blower Access Panel Removed Table 3 - Speed SelectionFig. 7 - Igniter Wire Placement Fig. 6 - Burner Box AssemblyUNIT COMPONENT ELECTRICAL SHORT HAZARD FIRE, EXPLOSION, UNIT DAMAGE HAZARDFig. 8 - Cleaning Inlet Openings of Primary Heat Exchangers Step 4 - Cleaning Heat ExchangersPRIMARY HEAT EXCHANGERS SECONDARY HEAT EXCHANGERSStep 5 - Flushing Collector Box and Drainage System Fig. 9 - Combustion-Air Intake Housing Gasket Repair58MEC UNIT DAMAGE HAZARDTube location when used in UPFLOW application Fig. 10 -- Furnace Pressure and Draining Tube DiagramTube location when used on Tube location when used onFig. 11 - Burner Flame Step 6 - Servicing Hot Surface IgniterFig. 12 - Gasket on Collector Box BURN HAZARDStep 8 - Checking Heat Tape Operation If Step 7 - Electrical Controls and WiringApplicable Step 9 - WinterizingFig. 16 - Field Wiring Fig. 15 - Field Wiring58MEC A99071TROUBLESHOOTING WIRING DIAGRAMStep 1 - Status Codes Fig. 17 - Two-Stage ControlStep 2 - Component Test Fig. 19 - Inducer Housing Drain Tube CapFig. 20 - Funnel in Drain Tube and Antifreeze Running Through Trap ELECTRICAL SHOCK AND UNIT OPERATION HAZARDSERVICE Fig. 21 - Service LabelLED CODE STATUSA08343 Fig. 22 - Wiring Diagram58MEC A05111 TROUBLESHOOTING GUIDE - TWO-STAGE58MEC Catalog No 58MEC---01SM 58MEC