Harman PF-120 - Troubleshooting and Frequently Asked Questions; Furnace Error Code Interpretation

Harman® • PF-120 Owner’s Manual_R3 • 2014 -___ • 10/1421
3-90-08120c
6
Troubleshooting and Frequently Asked Questions
Mode Selector
Allows you to choose betweenAutomatic Mode, Service
ModeorOFF.
Automatic Mode
Automaticmodeswitchesoperationalcontrolofthefurnaceto
thewallmountedcontrol.Thisisthemodetousewhenever
thefurnaceisburninginanormalheatingapplication.
Service Mode
Servicemode switchescontrolof thefurnaceto thetemp
dial.Thetempdialcanbesetfrom1to7toallowasteady
furnacetemperatureatthedesiredlevel.Themainpurpose
ofthismodeistooperatethefurnacewithouthavingtogo
backtothewallmountedcontrol.
OFF Mode
TurningthemodeselectortoOFFwillshutdownthefurnace.
A. Error Code Description
Status light error messages:
2 Blinks: Indicateslackofdraft,door/lidisopen,pressure
switchisopen,ueblockage.
3 Blinks:IndicatesthattheESP(ExhaustSensingProbe)
hasgoneoutofrangetoomanytimes.Iftheunitseemsto
beoperatingnormally,Performamanualreset*.Ifthecode
persists,you’llneedtocallaservicetechnician.
4 Blinks:CanoccuronlyintheAutomaticModeandindicates
theWallControlhasfailedorisnotinstalled.IfaWallcontrol
istheninstalledthestatuslightwillautomaticallyreset.
5 Blinks:(InAutoLightModeOnly)
Indicatesthat the igniter has failedto light there after 4
consecutive 8 minute attempts. To reset -Turn the Mode
SelectortoOFFandthenbacktoAutomatic.
6 Blinks :Indicatesthatthecontrolhascalculatedpooror
incompletecombustionoccurringformorethan25minutes.
Asixblinkstatusmaybesetifthefurnaceisallowedtorun
outofpellets.Toreset,turnmodeselectorto“OFF”thenback
ontothedesiredmode.Iftheunitwasnotoutofpellets,see
Troubleshootingsectionformoredetails.
* Manual reset,disconnectpoweratthecircuitbreakerfor
afewsecondsandreconnect.Iferrorstilloccurscallyour
Dealer.