Nordyne AND M5S, SERIES M1B Control Module Status Indicators M1M Series, Red LED Indicator Status

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	Control Module Status Indicators - M1M Series
Red LED Indicator	Status

Steady ON	Control OK

Steady OFF	No power

Rapid ﬂ ash	False ﬂ ame or internal control fault

One ﬂ ash	Limit switch is open

Two ﬂ ashes	Pressure switch is open

Three ﬂ ashes	Pressure switch is stuck closed

Four ﬂ ashes	Lockout due to failed ignition

Five ﬂ ashes	L1 neutral reversed or L1 voltage not present on L1

Flame Status - A Yellow LED labeled “Flame” is provided to indicate ﬂ ame status. When ﬂ ame is sensed, the ﬂ ame LED is lit. If ﬂ ame sense is weak, yellow LED will ﬂ ash.

		Control Module Status Indicator - M1B

	Red LED Indicator	Status

	One ﬂ ash	The control is in lock-out because the inducer centrifugal switch is or
	One ﬂ ash	was stuck closed.
		was stuck closed.

	Two ﬂ ashes	The control is in lockout because the signal was not received by the
	Two ﬂ ashes	control that the inducer centrifugal switch had closed within the time.


		The control is in lockout because a failed ignition attempt, a gas valve
	Three ﬂ ashes	error, or a false ﬂ ame sensed during the warm up period. If false ﬂ ame
	Three ﬂ ashes	has been sensed, the control will return to normal operation, and repeat

		ignition sequence when the false ﬂ ame is not present.

	Four ﬂ ashes	The control is in lockout due to a failure within the control board

Control Module Status Indicator - M5S Series

The LED indicator(s) on the oil primary control provides lockout, recycle and cad cell indications.

Honeywell R7184 Control

Green LED Indicator	Status

On	Cad cell is sensing ﬂame (could be ﬂ ame or stray light)

Off	Cad cell is not sensing ﬂame

Flashing - 1/2 sec. on, 1/2 sec. off	Lockout/Restricted Lockout

Flashing - 2 sec. on, 2 sec. off	Recycle

Beckett 7505 Control

	LED Indicator Color	On Continuously	Flashing

	Red	Restricted (hard) lockout	Soft lockout

	Green	Cad cell is sensing ﬂ ame -	Recycle
	Green	(could be ﬂ ame or stray light)	Recycle
		(could be ﬂ ame or stray light)

	Yellow	Pump prime mode or reset	N/A
	Yellow	button currently held for 15+ sec.	N/A

Table 9. Control Module Status Indicators

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Contents For installation Installation InstructionsStanding Pilot Models Direct Ignition Models Oil Gun Models Homeowner Information Installer Information InformationReturn Air Connections Supply Air Connections Requirements and Codes Safety InformationGeneral Installation Gas Piping and Gas Pipe Pressure TestingSafety Combustion and Ventilation AirALL Models Closet Alcove General InformationMinimum Clearances Applications AssemblyUnit Location BlowerReturn Air Connections Circulating AIR RequirementsGas piping is not run in or through the return duct system Supply Air ConnectionsDetermine which duct connector to use from Furnace InstallationGeneral Information Requirements and CodesDuct Connector Sizes Standard Duct Connector Installation Cut-Out Dimensions for Standard Duct ConnectorsInstalling The Furnace Duct Connector TabsRequired ceiling and roof cut-out openings see Roof Jack InstallationRoof Jack Selection Application NotesSlant Deck Flashings Roof Jack Series If Roof Pitch is Slant Deck FactorInstallation of Transit-Mode Venting System Installing The Roof JackConnect ﬂ ue pipe to ﬂ ue collar of furnace. See Figure Secure ﬂ ashing with appropriate fastenersElectrical Information Line Voltage WiringWire Heating Heating/Cooling Low Voltage WiringThermostat Wire Gauge Thermostat Length Unit to T’STATImportant Notes Fuel Supply and PipingFuel line Hook-Up Oil Tank and Piping InstallationConversion to Propane LP Gas Leak CheckFuel Oil Type Honeywell Gas Valve High Altitude ConversionStanding Pilot Valve Lighting Instructions Standing Pilot ModelsOperating Instructions for Direct Ignition Models M1M Replace the furnace doorPilot Flame Standing Pilot Only Burner AdjustmentsFor oil, shut off all valves Replace the furnace door Combustion Air Factory Combustion Air SettingsElectrode Setting Oil Gun Only Standing Pilot Operating SequenceStanding Pilot w/Induced Draft Blowers M1M Models with Direct IgnitionFurnace Controls & Functions Direct Ignition Furnaces Including Gas Gun M1B Series see , TroubleshootingStanding Pilot Models Page Optional Accessories Burner will not start and the LED indicator isCad Cell Resistance when Sensing ﬂame Cad cell is operational, replace the primary controlRed LED Indicator Status Control Module Status Indicators M1M SeriesControl Module Status Indicator M1B Control Module Status Indicator M5S SeriesInstaller Information MaintenanceAdditional Oil Furnace Maintenance Clean or replace the oil ﬁ lter element at the oil tankM1GB Burner Direct Blower TonsM1MC Manifold Pressure Natural Gas 3.5 w.cOriﬁ ce Size Nat. Gas Oriﬁ ce Size LP Equivalent Oriﬁce Sizes for High Altitude InstallationsOutput Mbtuh Oriﬁ ce Size Nat. GasGas Flow Rates Cubic Feet per Hour GAS InformationModels Wiring DiagramsM1GH 077, 090 Models M1GB 056, 070 Models Gas AtmosphericWiring Diagram Steady OFF No power Blinking Wiring Diagram Installation Address Installation / Performance Check List