Carrier 58PHA/PHX instruction manual Catalog No 58PHA---03SI

58PHA

45 CONTROLCIRCUITRYLOCKOUT Auto-resetafter1hourlockoutdueto: - Flamecircuitfailure. - Gasvalverelaystuckopen. - Softwarecheckerror. Resetpowertoclearlockout.Replace controlifcoderepeats.	Replacefurnacecontrol.	Checkforcontinuityintheharnessandigniter. Replacedefectivecomponent.
	NO	YES
	Unplugigniterharnessfromcontrolandinitiate anothercomponenttestsequence.Check	for115Vbetweenpin1andNEUTRAL-L2on thecontrol.Was115Vpresentforthe15 secondperiod?

Checkconnections.IfOK,replacecontrol.	Checkthatallgasvalvesareturnedon. Replacevalve.
NO
ReconnecttheRthermostatleadandset thermostattocallforheat.Connectvoltmeter	acrossgasvalveconnections.Doesgasvalve receive24V?	YES

Checkfor:

- Inadequateflamecarryoverorrough ignition. - Lowinletgaspressure. - Properfiringrate. - Blockedorincorrectcarry-overgap. (.045”nominal)

Allowblowertocomeonandrepeattestto checkforintermittentoperation.

Checkconnectionsandretry.Ifcurrentis

neartypicalvalue(4.0-6.0nominal)and

burnerswillnotstayon,replacecontrol.

Replaceelectrode.

Replacefurnacecontrol.

NO

NO

YES

NO

NO

NO

Doesgasvalveopenandallowgastoflow?

YES

Dothemainburnersignite?

YES

Dothemainburnersstayon?

NO

Repeatcallforheatandcheckflamesensor

currentduringtrialforignitionperiod.Isthe

DCmicroampsbelow0.5?

YES

Cleanflamesensorwithfinesteelwooland recheckcurrent.Nominalcurrentis4.0to6.0 microamps.

Iscurrentneartypicalvalue?

YES

Willmainburnersigniteandstayon?

YES

Fixed.

NO YES

Adapter Kit

31 PRESSURE SWITCH DID NOT CLOSE OR REOPENED – If open longer than 5 minutes, inducer shuts off for 15 minutes before retry. If opens during blower on- delay period, blower will come on for the selected blower off-delay. Check for: - Proper vent sizing.

11 NO PREVIOUS CODE – Stored codes are erased after 72 hours. On RED LED boards stored status codes can also be erased whenever power (115V or 24V) is interrupted. Run system through a heating or cooling cycle to check system.

Lowinducervoltage(115V). Lowinletgaspressure(ifLGPSused). Inadequatecombustionairsupply. Disconnectedorobstructedpressure tubing.	Defectiveinducermotor. Defectivepressureswitch. Excessivewind. Restrictedvent.
- - - -	- - - -

12 BLOWER ON AFTER POWER UP – (115V OR 24V) – Normal operation. Blower runs for 90 seconds, if unit is powered up during a call for heat (R-W closed) or when (R-W opens) during the blower on-delay period.

33 LIMIT CIRCUIT FAULT – Indicates the limit, draft safeguard, flame rollout, or blocked vent shutoff switch* (if used) is open. Blower will run for 4 minutes or until open switch remakes whichever is

13 LIMIT CIRCUIT LOCKOUT – Lockout occurs if the limit, draft safeguard, flame rollout, or blocked vent switch*(if used) is open longer than 3 minutes. Control will auto-reset after 3 hours. See code 33.

longer. If open longer than 3 minutes, 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:

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.

- Dirtyfilterorrestrictedductsystem. - Looseblowerwheel. - Defectiveswitchorconnections. - Defectiveblowermotororcapacitor. - Inadequatecombustionairsupply (flamerolloutswitchopen). - Restrictedvent. - Properventsizing. - Excessivewind.	IGNITIONPROVINGFAILURE–Ifflame isnotsensedduringthetrialforignition period,thecontrolwillrepeattheignition sequence3moretimesbeforelockout #14occurs.Ifflamesignalislostduring thebloweron-delayperiod,blowerwill comeonfortheselectedbloweroff-delay. Checkthefollowingitemsfirstbefore proceedingtothenextstep.
	34

GASHEATINGLOCKOUT–Turnoff powerandwait5minutestoretry. Checkfor: - Stuckclosedgasvalverelayoncontrol. - Miswireorshorttogasvalvewire.	ABNORMALFLAME-PROVINGSIGNAL Flameisprovedwhilegasvalveisde- energized.Inducerwillrununtilfaultis cleared.Checkfor: - Stuckopenorleakygasvalve.	PRESSURESWITCHDIDNOTOPEN Checkfor: - Obstructedpressuretube. - Pressureswitchstuckclosed.
21	22	23

- Gas valve turned off. - Manual shut-off valve. - Green/Yellow wire MUST be connected to furnace sheet metal. - Flame sensor must not be grounded. To determine whether the problem is in the gas valve, igniter, or flame sensor the system can be operated in the component test mode to check the igniter. First remove the R thermostat connection from the control and initiate the component test sequence. Does the igniter glow orange/white by the end of the 15 second warm-up period?

24 SECONDARY VOLTAGE FUSE IS OPEN Check for: - Short circuit in secondary voltage (24V) wiring including thermostat leads. Disconnect thermostat leads to isolate short circuit.

* Blocked vent shutoff switch used in Chimney

A05032

Copyright 2008 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231	Printed in U.S.A.	Edition Date: 11/08	Catalog No: 58PHA---03SI
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.			Replaces: 58PHA--02SI

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