Lennox Hearth EBSTNM-2, EBSTPM-2 manual Troubleshooting the Electronic Ignition System

Page 19

TROUBLESHOOTING THE ELECTRONIC IGNITION SYSTEM

Note: Before troubleshooting, make sure that the appliance main line gas shut-off valve and the gas control valve are in the "OPEN" position and the burner ON/OFF switch is in the “ON” position.

Important: Valve system troubleshooting should only be accomplished by a qualified service technician.

 

SYMPTOM

POSSIBLE CAUSES

CORRECTIVE ACTION

 

 

 

 

1.

Burner will not light.

A. Faulty Valve System.

See Below.

 

 

 

 

 

 

B. “OFF/ON” or wall switch

Disconnect the two black wires from the wire nuts. Test switch(s) for

 

 

defective.

continuity with a multimeter. If continuity is not indicated, switch(s) is

 

 

 

defective and must be replaced.

 

 

 

Note: Before replacing “OFF/ON” switch, be sure to check wiring for loose

 

 

 

connections or broken wires and repair as needed.

 

 

 

 

2.

Burners come “ON” but

A. Burner orifice plugged.

Check main burner orifice(s) for stoppage. Clean or replace.

 

go “OFF.”

 

 

 

B. Obstructed vent system.

Check vent system for obstructions.

 

 

 

 

 

 

START

•Turn Off Gas Supply

•Assure Valve Switch Is In ON Position

•Disconnect Control Harness

•Set Thermostat To Call For Heat

Insert A

End View Of

 

Control Harness

24 Volt Hot

Connector

24 Volt

 

 

Common

•Check For Proper Voltage At Control Harness (See Insert A). Voltage Should Be 24V

Between Thermostat Or Pressure Switch

 

And 24V Common And 24V Hot.

2

 

YES

 

 

 

• Plug Control Harness Into Valve. Wait For

Internal Check Delay.

 

• Igniter Warms Up And Glows Red.

1

YES

 

 

CHECK

NO

• Line Voltage Power

• Low Voltage Transformer

 

 

• Limit Controller

 

 

• Thermostat

 

 

• Wiring

 

 

 

 

 

 

NO

• With Pilot Burner Cable Connected, Measure

 

 

Voltage At Valve HSI Element Output. 24V

 

 

 

Nominal. (See Insert B)

2

 

 

 

1

 

 

 

 

 

YES

NO

• Replace Valve.

24 Volt

Switched

Check For Damaged Or Missing Terminals In Connector

Insert B

Igniter Terminals

• Turn On Gas Supply. • Pilot Burner Lights.

YES

•Replace Igniter/Flame Rod Assembly.

YES

 

NO

 

 

• Check That Pilot Gas Is Flowing. Wait To

 

NO

 

• Replace Valve.

 

 

 

 

 

 

 

 

 

Assure Plot Gas Tubing Is Purged. Recycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Call For Heat If Necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Measure Voltage Between 24V Hot And 24V Common

 

 

 

 

 

 

Leads To Valve Control. Must Measure At Least 19.5

NO

 

 

 

 

 

VAC With Igniter Powered (See Insert A). To Identify

 

• Check Transformer And

 

 

 

 

 

Line Volt Supply.

 

 

 

Proper Lead, This Check Must Be Done With The

 

 

 

 

 

Valve Control Connected And Igniter Powered.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Replace Pilot Assembly.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Check That Pilot Flame Makes Good Contact With

 

 

NO

Pilot Burner Flame Rod.

• Main Valve Opens And Main Burner Lights.

• Check For Good Electrical Connection Through The

 

 

 

 

Pilot Tubing.

 

 

 

 

• If Both Of The Above Are Good, Replace Igniter/Flame

 

YES

 

 

Rod Assembly.

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

• System Is Okay.

 

 

 

• Cycle Thermostat Off And Back On.

 

 

 

 

 

 

 

 

 

1

Igniter Will Cycle Off And Back On Once During

2

When Measured Voltage At Connections, Use

• Main Burner Lights.

NO

 

• Replace Valve.

 

The 90 Second Ignition Trial. All Voltage

 

Care To Assure Terminals Are Not Damaged.

 

 

 

 

 

 

Measurements Must Be Taken While The Igniter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is Powered.

 

 

 

 

 

 

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Contents Retain These Instructions For Future Reference Congratulations Table of ContentsOperation and Care of Your Appliance Control Compartment Access Millivolt Control Valve ShownManifold Pressure Port GasControls/ControlCompartmentAccessMillivolt Appliances Electronic AppliancesOutside Air Control Lever Securing Screw Location Variable Flame Height Adjustment Millivolt Appliances onlyVenting Action and Safety Limit Operation Outside Combustion Air ControlsSafety Switch Location EBCL-2 Shown MaintenanceFront Glass Enclosure Panel, Removal and Installation Manual-Reset Safety Limit SwitchMaintenance Task Accomplishing Person Procedure Maintenance ScheduleClean Glass While IT is HOT Models Burner AdjustmentsMain Burner Factory Shutter Setting PropaneBottom of the log set is notched to accommodate the pilot Log PlacementInstall the unitized log set Burner PositioningProduct Reference Information WarrantyReplacement Parts Lennox Hearth ProductsDoor Frame Kits Accessory ComponentsStandard Remote Control System Model RCL ON/OFF Wall Switch KitPolished Brass and Brushed Stainless Hood Kits Deluxe Remote Control System Model RCL-TAccessory Components Charcoal Finish Louvers KitsTouch-Up Paint Kit Piece Polished Brass and Brushed Stainless Louvers KitsPolished Brass and Brushed Stainless Louvers Kits Screen Panel KitWhat to do if YOU Smell GAS Lighting Instructions Millivolt GAS ValveLighting Instructions To Turn OFF GAS to ApplianceInstructions Dallumage Instructions D’ALLUMAGE Vanne GAZ MillivoltPour Fermer LE GAZ QUI Alimente L’APPAREIL Front View Lighting Instructions ElectronicWhat to do if YOU Smell GAS To Shut OFFPour Fermer LE GAZ QUI Alimente L’APPAREIL Instructions D’ALLUMAGE ElectronicInstructions D’ALLUMAGE Pour Éteindre L’APPAREILSymptom Possible Causes Corrective Action Check vent system for obstructions Troubleshooting the Electronic Ignition SystemDescription GAS Controls SIT MillivoltGAS Controls Honeywell Electronic GAS Orifices SIT and Honeywell SystemsDescription Replacement Parts ListNatural and Propane Qty Rear Burner Front Burner 11a 11b31 37 13a 13b 3a10 Cabinet Corner Post LocationPage 875,012M REV. D 05/2004

EBSTNM-2, EBSTPM-2 specifications

Lennox Hearth is a reputable name in the heating and ventilation industry, known for producing high-quality, energy-efficient heating solutions. Among their impressive lineup, the EBSTPM-2 and EBSTNM-2 models stand out for their superior performance and innovative features.

Both models are designed to provide reliable warmth in residential settings while ensuring ease of use and energy efficiency. The EBSTPM-2 comes with a robust pellet-burning system, boasting a high-efficiency rating that ensures optimal heating output with minimal energy consumption. This model is particularly praised for its environmentally friendly operation, utilizing wood pellets as a renewable energy source.

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Safety features are paramount in both models, with built-in mechanisms that prevent overheating and ensure safe operation. This highlights Lennox’s commitment to user safety and product reliability. For added convenience, both models are equipped with an automatic ignition system, allowing for a hassle-free startup process.

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In conclusion, the Lennox Hearth EBSTPM-2 and EBSTNM-2 are exemplary models that combine innovative technology, safety, and eco-friendliness. Their ability to provide consistent and efficient heat makes them ideal choices for homeowners looking to enhance their comfort while also being mindful of energy consumption and the environment.
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