Bryant 315AAV instruction manual Adapter Kit, Blocked vent switch used in Chimney, A02108B

CONTROLCIRCUITRYLOCKOUT	Auto-resetafter1hourlockoutdueto:	- Flamecircuitfailure.	- Gasvalverelaystuckopen.	- Softwarecheckerror.	Resetpowertoclearlockout.
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LOW-HEATPRESSURESWITCHOPEN	WHILEHIGH-HEATPRESSURE	SWITCHISCLOSED- Checkfor:	- Low-heatpressureswitchstuckopen.	- Disconnectedorobstructedpressure	tube.
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Replacecontrolifcoderepeats.	Replacefurnacecontrol.	Checkforcontinuityintheharnessand igniter.Replacedefectivecomponent.
	NO	YES
- Miswiredpressureswitches. - Lowinletgaspressure(ifLGPSused).	Unplugigniterharnessfromcontroland repeatcomponenttestbyturningsetupswitch	SW1-6OFFandthenbackON.Checkfor 115Vbetweenpin3andNEUTRAL-L2on thecontrol.Was115Vpresentforthe15 secondperiod?

Checkconnections.IfOK,replacecontrol.	Checkthatallgasvalvesareturnedon. Replacevalve.
NO		NO
ReconnecttheRthermostatleadandset thermostattocallforheat.Connectvoltmeter acrossgasvalveconnections.Doesgas valvereceive24V?	YES	Doesgasvalveopenandallowgastoflow?

Checkfor: - Inadequateflamecarryoverorrough ignition.	- Lowinletgaspressure. - Properfiringrate. - Blockedorincorrectcarry-overgap. (.045”nominal)	Allowblowertocomeonandrepeattest tocheckforintermittentoperation.
NO	YES

YES	ignite?	YES	stayon?	NO
	Dothemainburners		Dothemainburners

Checkconnectionsandretry.Ifcurrentis neartypicalvalue(4.0-6.0nominal)and	burnerswillnotstayon,repeatcheckinhigh- heat.Ifburnerswillstillnotstayonreplace	control.Ifburnersoperateinhigh-heatthen	switchtolow-heat,checkmanifoldpressure.	IfOK,checkburnercarryoverandflame sensorlocation.	Replaceelectrode.		Replacefurnacecontrol.
NO					NO		NO
Repeatcallforheatandcheckflamesensor currentduringtrialforignitionperiod.Isthe DCmicroampsbelow0.5?	YES	Cleanflamesensorwithfinesteelwooland	recheckcurrent.Nominalcurrentis4.0to	6.0microamps.	Iscurrentneartypicalvalue?	YES	Willmainburnersigniteandstayon?	YES	Fixed.
			NO					YES

Adapter Kit

315AAV

LOW-HEATPRESSURESWITCHDID	NOTCLOSEORREOPENED–Ifopen	longerthan5minutes,inducershutsoff	for15minutesbeforeretry.Ifopens duringbloweron-delayperiod,blowerwill comeonfortheselectedbloweroff-delay. Checkfor:
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NOPREVIOUSCODE–Statuscodes	areerasedafter72hoursorcanbe	manuallyerasedbyputtingsetupswitch	SW1-1intheONpositionandjumpering R,W/W1,andY/Y2simultaneouslyuntil statuscode#11isflashed.Runsystem
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Properventsizing. Lowinducervoltage(115V). Lowinletgaspressure(ifLGPSused). Inadequatecombustionairsupply. Disconnectedorobstructedpressure tubing.	Defectiveinducermotor. Defectivepressureswitch. Excessivewind. Restrictedvent.
- - - - -	- - - -

throughalow-heat,high-heat,orcooling cycletochecksystem.	BLOWERONAFTERPOWERUP– (115VOR24V)–Normaloperation. Blowerrunsfor90seconds,ifunitis poweredupduringacallforheat(R- W/W1closed)orwhen(R-W/W1opens) duringthebloweron-delayperiod.
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33 LIMIT CIRCUIT FAULT – Indicates the 13 LIMIT CIRCUIT LOCKOUT – Lockout

limit, draft safeguard, flame rollout, or occurs if the limit, draft safeguard, flame

blocked vent switch* (if used) is open or rollout, or blocked vent switch* (if used)

the furnace is operating in high-heat only is open longer than 3 minutes or 10

mode due to 2 successive low-heat limit successive limit trips occurred during

trips. Blower will run for 4 min. or until high-heat. Control will auto-reset after 3

open switch remakes whichever is longer. hours. See code 33.

If open longer than 3 min., code changes

to lockout #13. If open less than 3 min. status code #33 continues to flash until blower shuts off. Flame rollout switch and BVSS requires manual reset. Check for: - Dirty filter or restricted duct system. - Loose blower wheel.

14 IGNITION LOCKOUT – System failed to ignite gas and prove flame in 4 attempts. Control will auto-reset after 3 hours. See status code 34.

- Defectiveswitchorconnections. - Inadequatecombustionairsupply

(flamerolloutswitchopen).

- Restrictedvent.

- Properventsizing.

- Excessivewind.

IGNITIONPROVINGFAILURE–Ifflame isnotsensedduringthetrialforignition

period,thecontrolwillrepeattheignition

sequence3moretimesbeforelockout

#14occurs.Ifflamesignalislostduring

thebloweron-delayperiod,blowerwill comeonfortheselectedbloweroff-delay. Checkthefollowingitemsfirstbefore

proceedingtothenextstep.

- Gasvalveturnedoff.

- Manualshut-offvalve.

- Green/YellowwireMUSTbeconnected

tofurnacesheetmetal.

- Flamesensormustnotbegrounded. Todeterminewhethertheproblemisin thegasvalve,igniter,orflamesensorthe

systemcanbeoperatedincomponent

testmode.Tochecktheigniterremove

theRthermostatconnectionfromthe control,resetpower,andputsetupswitch SW1-6intheONpositiontostartthe

componenttest.Doestheigniterglow

orange/whitebytheendofthe15second

warm-upperiod?

34

BLOWERMOTORLOCKOUT–Indicates

theblowerfailedtoreach250RPMor

theblowerfailedtocommunicatewithin

30secondsafterbeingturnedONintwo

successiveheatingcycles.Controlwill auto-resetafter3hours.Seecode41.

GASHEATINGLOCKOUT–Turnoff

powerandwait5minutestoretry.

Checkfor:

- Stuckclosedgasvalverelayoncontrol.

- Miswireorshorttogasvalvewire.

ABNORMALFLAME-PROVINGSIGNAL

Flameisprovedwhilegasvalveisde-

energized.Inducerwillrununtilfaultis

cleared.Checkfor:

- Stuckopenorleakygasvalve.

PRESSURESWITCHDIDNOTOPEN

Checkfor:

- Obstructedpressuretube.

- Pressureswitchstuckclosed.

SECONDARYVOLTAGEFUSEISOPEN

Checkfor:

- Shortcircuitinsecondaryvoltage (24V)wiringincludingthermostat leads.Disconnectthermostatleads toisolateshortcircuit.

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* Blocked vent switch used in Chimney

A02108B

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