Lennox Hearth LSM40ST-N-PV Troubleshooting Guide Power Vent System, Start

Page 24

LENNOX HEARTH PRODUCTS • MONTEBELLO® SEE-THROUGH POWER VENT DV GAS FIREPLACES (LSM40ST-N-PV) • CARE AND OPERATION INSTRUCTIONS

Troubleshooting GUIDE: Power Vent System

Important: Service must be performed by a qualified installer, service agency, or your gas supplier.

BEFORE TROUBLESHOOTING THE UNIT:

1.Check whether there is power to the unit (fireplace).

2.Check whether there is gas to the unit (fireplace).

3.The igniter module in the fireplace is equipped with a lockout device that will put the unit into a lockout condition. Follow the steps in the chart below to reset the control: Turn the Wall Receiver Switch to the OFF position, or turn the Remote Control Transmitter OFF.

4.If this is the first time the unit has been fired, check the unit wiring against the wiring diagram before performing any troubleshooting.

START

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power Vent Motor

No

 

Wall Receiver Switch “On”? Is There

Yes

 

Is There 120V Power

Yes

 

 

 

 

Replace Blower

 

Is Working?

 

 

120V Power To The Fireplace? Are All

 

 

To The Motor?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Wiring Connections Tight? (Turn Off

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

No

 

 

 

 

 

 

 

 

Power Before Checking)

 

 

 

 

 

Replace Control Module

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

Is The Pressure

No

Does The Pilot

 

 

Switch Closed?

 

Spark?

Yes

Is The Lead To The

Yes

 

 

 

 

 

Spark Electrode

 

 

Yes

 

Attached Or Arcing

Replace Control

 

 

To Ground? Is The

 

 

 

Module

 

 

 

Electrode Cracked?

 

 

 

 

 

Is There Blockage In The Vent?

No

 

Replace Pressure

Is There Water/Dirt In The Hose From

 

 

Switch

The Blower To The Pressure Switch?

 

 

 

 

 

 

Are the Hose Connections Loose?

 

 

 

Is The Hose Cracked?

 

 

 

 

 

 

 

Pilot Burner

Lights?

Yes

No

No

Is Pilot Gas Line

Blocked? Is Pilot

Orifice Blocked?

No

Replace Ignition Module

Yes

Replace Pilot

 

Replace Ignition Module

WARNING: RISK OF SERIOUS PERSONAL INJURY, DEATH, OR PROPERTY DAMAGE.

Never jump the pressure switch out of this system.

Does Spark

Stop When Pilot

Lights?

Yes

No

 

Does Pilot Flame

Yes

 

 

Cover The Flame

 

 

 

Rod?

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

Check Pilot For Obstruction.

Check Gas Pressure.

Adjust Pilot Flame.

Is The Flame Rod Corroded? Is The Pilot Hood Corroded?

Is Flame Rod Insulator Cracked? Is Wire To Flame Rod Damaged?

No Replace Ignition Module

Does Main Burner

No

Is There 1V Power

Yes

 

 

Are Wires To Valve

 

No

 

 

 

 

 

Yes

 

Check Position Of

 

 

 

Is There Manifold Pressure?

Light?

 

 

At Terminal 1 (MV)

 

 

 

 

Loose Or Corroded?

 

 

 

 

 

Pilot. Is Orifice

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

During Spark Cycle?

 

 

 

 

 

 

 

 

 

 

No

 

 

Blocked?

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

Replace Ignition Module

 

 

 

Replace Gas Valve

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

System Runs

Continuously

Until Switched

Off?

No

Is The Correct Size Of Orifice Restrictor Installed In The Power Vent? Does The Pilot Flame Cover The Flame Rod?

Is The Sensor Wire In Good Condition?

Is There Continuity To Ground From The Pilot Burner?

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

Does Pressure Switch Open During Operation?

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace Pressure Switch

No

Is Vent Partially Blocked?

Is There Water/Dirt In Hose To Pressure Switch?

Are Hose Connections Loose?

Is The Hose Cracked?

24

 

 

 

 

 

Does System Run

No

Replace Ignition

Replace Ignition Module

 

Replace Control Module

 

 

 

Continue?

 

 

Module

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

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Contents LSM40ST-N-PV 506025-03 Rev. C 04/2011Whats Inside ModelsSafety Your Fireplace Spanish Seguridad y su chimenea Important Safety Information Et toute commande qui a été plongée dans l’eauAttaching Safety-in-Operation Warnings Colocación de advertencias de seguridad en operaciónLennox Hearth Products LennoxAppliance Installation, Service, and Maintenance Notices Warranty InformationAppliance Operation Notices General Information EfficienciesOperation and care of your appliance Gas ControlsAppliance Operation Purge CycleRemote Control System Using the Remote Transmitter Press the ON/OFF key Key LockManual Bypass of the Remote System Flame LevelMaintenance Install only when fireplace is OFF and Cold Install one of the glass doors, as followsHot Glass will Cause Burns Removing Glass Doors, Mesh Pull Screens, and Modesty PanelPlacement of Volcanic STONE, Glowing EMBERS, and Logs Bag of Glowing EmbersControl Side Control Side Top view of burner shownLog, Center Log, Top Right Log, Top LeftLog, Top Front Pin Groove LocationDetail Burner Adjustments Burner Air Shutter Adjustment GuidelinesPilot Assembly Flame Appearance and SootingOrdering Replacement parts Wiring DiagramProduct Reference InformationAccessory Components Andiron KitsCeramic and Porcelain Panel Kits Bag of Glowing Embers Bag of Volcanic StoneOutdoor Kit Arch Screen KitsClassic Screen Kits Barrier Screen KitsFor Your Safety Read Before Operating What to do if YOU Smell GASOperating Instructions To Turn OFF GAS to AppliancePour Plus DE Sécurité Lire Avant DE Mettre EN Marche QUE Faire SI Vous Sentez UNE Odeur DE GAZComment Couper L’ADMISSION DE GAZ DE L’APPAREIL Maintenance Schedule Maintenance TaskProcedure Do not touch or attempt to clean glass while hotSymptom Possible causes Corrective action Troubleshooting Guide Power Vent System StartReplacement Parts List Gas Controls SIT ElectronicCat. No Replacement Parts Illustration Power Vent Replacement Parts 2520506025-03 Rev. C 05/2011

LSM40ST-N-PV specifications

The Lennox Hearth LSM40ST-N-PV is a premium gas fireplace that combines elegance with advanced technology to create an unparalleled heating experience. Designed for both aesthetic appeal and functional efficiency, this model is perfect for homeowners seeking to enhance their living spaces while enjoying the warmth of a traditional fireplace.

One of the standout features of the LSM40ST-N-PV is its sleek and contemporary design. The fireplace boasts a clean face, which allows for a larger viewing area, ensuring that the mesmerizing flames become the focal point of any room. Its glass front adds a modern touch, making it suitable for various interior styles, from classic to contemporary.

In terms of performance, this gas fireplace utilizes the latest innovations in venting technology, offering versatility for installation. The direct vent system draws air from outside for combustion, ensuring optimal efficiency while maintaining indoor air quality. This feature allows homeowners to enjoy a cozy fire without worrying about the impact on the surrounding environment.

The LSM40ST-N-PV is equipped with a powerful, multi-functional remote control, enabling users to adjust the flames, heat settings, and even the blower fan from the comfort of their couch. This user-friendly control system enhances the overall convenience and allows for a customized heating experience.

Another significant characteristic of the Lennox Hearth LSM40ST-N-PV is its high-efficiency rating. With minimal heat loss and effective distribution, this fireplace quickly warms up spaces, offering comfort even during the coldest months. The model also features an adjustable flame height, allowing homeowners to create the perfect ambiance, whether for a cozy evening or a festive gathering.

In terms of aesthetics, the fireplace can be fitted with a variety of decorative media options, such as glass, logs, or stones, catering to individual tastes and enhancing the visual appeal. Additionally, the unit operates quietly, ensuring that the crackle of flames is the only sound heard, promoting a peaceful environment.

Durability is also a key attribute of the LSM40ST-N-PV. Constructed from high-quality materials, it's built to last while requiring minimal maintenance. Easy installation and clear documentation mean that homeowners can enjoy their new fireplace with ease.

In summary, the Lennox Hearth LSM40ST-N-PV gas fireplace offers modern design, advanced technologies, and exceptional efficiency, making it a perfect addition to any home looking to elevate its comfort and style.
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