Desa FBS-3C, FB-5B, FBS-5C Troubleshooting, Observed Problem Possible Cause Remedy

Page 15

OWNER’S MANUAL

TROUBLESHOOTING

Note: For additional help, visit DESA International’s technical service web site at www.desatech.com.

Note: All troubleshooting items are listed in order of operation.

WARNING: Turn off and un- plug heater and let cool before servicing. Only a qualified ser- vice person should service and repair heater.

CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot. This can damage ODS/ pilot unit.

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

When ignitor button is pressed in, there is no

1.

Ignitor electrode positioned wrong

1.

Replace ignitor

spark at ODS/pilot

2.

Ignitor electrode broken

2.

Replace ignitor

 

3.

Ignitor electrode not connected to igni-

3.

Reconnect ignitor cable

 

 

tor cable

 

 

 

4.

Ignitor cable pinched or wet

4.

Free ignitor cable if pinched by any

 

 

 

 

metal or tubing. Keep ignitor cable dry

 

5.

Broken ignitor cable

5.

Replace ignitor cable

 

6.

Bad piezo ignitor

6.

Replace control valve (piezo is part of

 

 

 

 

control valve)

 

 

 

 

 

ODS/pilot lights but flame goes out when

1.

Gas supply turned off or equipment

1.

Turn on gas supply or open equipment

control knob is released

 

shutoff valve closed

 

shutoff valve

 

2.

Control knob not fully pressed in while

2.

Fully press in control knob while press-

 

 

pressing ignitor button

 

ing ignitor button

 

3.

Air in gas lines when installed

3.

Continue holding down control knob. Re-

 

 

 

 

peat igniting operation until air is removed

 

4.

Depleted gas supply

4.

Contact local propane/LP gas company

 

5.

ODS/pilot is clogged

5.

Clean ODS/pilot (see Cleaning and

 

 

 

 

Maintenance, page 14 ) or replace ODS/

 

 

 

 

pilot assembly

 

6.

Gas regulator setting is not correct

6.

Replace gas regulator

 

7.

Control knob not in pilot position

7.

Turn control knob to pilot position

 

 

 

 

 

When ignitor button is pressed in, there is a

1.

Control knob not fully pressed in

1.

Press in control knob fully

spark at ODS/pilot but no ignition

2.

Control knob not pressed in long enough

2.

After ODS/pilot lights, keep control

 

 

 

 

knob pressed in 30 seconds

 

3.

Equipment shutoff valve not fully open

3.

Fully open equipment shutoff valve

 

4.

Thermocouple connection loose at con-

4.

Hand tighten until snug, then tighten

 

 

trol valve

 

1/4 turn more

 

5.

Pilot flame not touching thermocouple,

5.

A) Contact local propane/LP gas company

 

 

which allows thermocouple to cool,

 

B) Clean ODS/pilot (see Cleaning and

 

 

causing pilot flame to go out. This prob-

 

Maintenance, page 14) or replace ODS/

 

 

lem could be caused by one or both of

 

pilot assembly

 

 

the following:

 

 

 

 

A) Low gas pressure

 

 

 

 

B) Dirty or partially clogged ODS/pilot

 

 

 

6.

Thermocouple damaged

6.

Replace thermocouple

 

7.

Control valve damaged

7.

Replace control valve

www.desatech.com

Continued

 

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Contents What to do if YOU Smell GAS Infrared VENT-FREE PROPANE/LP GAS HeaterInfrared PROPANE/LP GAS Heater Safety InformationUnpacking Product FeaturesProduct Identification Local CodesConfined and Unconfined Space Fresh AIR for Combustion and VentilationProducing Adequate Ventilation Unusually Tight ConstructionFresh AIR for Combustion Ventilation Determining FRESH-AIR Flow for Heater LocationDetermining if You Have a Confined or Unconfined Space Ventilation AIR Ventilation Air From Inside BuildingVentilation Air From Outdoors Check GAS Type InstallationInstallation Items Installing Thermostat Sensing BulbMarking Screw Locations Installing Heater to WallMounting Bracket Methods For Attaching Mounting Bracket To WallInstalling Bottom Mounting Screws Attaching Mounting Bracket To WallPlacing Heater On Mounting Bracket Typical Inlet Pipe Diameters Connecting to GAS SupplyChecking GAS Connections For Your SafetyOperating HeaterTo Select Heating Level Manual Lighting ProcedureOperating Heater Lighting InstructionsPress in control knob and turn coun For Your Safety Read Before LightingInspecting Burner Cleaning and MaintenanceObserved Problem Possible Cause Remedy TroubleshootingInfrared PROPANE/LP GAS Heater Top Parts Centrals SpecificationsTechnical Service Replacement PartsService Hints Service Publications AccessoriesODS/Pilot Assembly Burner Assembly Illustrated Parts BreakdownFB-3B KEY FB-3B Description Parts ListFB-5B Burner Assembly ODS/Pilot AssemblyKEY FB-5B Description FBS-3C KEY FBS-3B Description QTY FBS-5B KEY FBS-5B Description QTY FBS-5CInternational Warranty Information

FBS-3C, FB-5B, FBS-5C specifications

Desa FBS-5C, FB-5B, and FBS-3C represent an innovative line of advanced heating solutions that prioritize energy efficiency, user comfort, and environmental sustainability. These models showcase cutting-edge technology and an array of features designed to meet the diverse needs of residential and commercial spaces.

The Desa FBS-5C distinguishes itself with its high efficiency rating and sleek design. This model incorporates a robust heat exchanger that maximizes thermal efficiency, ensuring that energy consumption is minimized while delivering consistent warmth. The advanced digital thermostat allows users to set precise temperatures, while the programmable timing function enables enhanced control over heating schedules. Safety is paramount, and the FBS-5C features multiple safety mechanisms, including over-temperature protection and tip-over shutoff.

The FB-5B model is tailored for users seeking an effective heating solution without compromising on design. This model is compact and lightweight, making it ideal for smaller spaces or discrete installation. It incorporates advanced radiant heating technology that creates a comfortable warmth without the need for traditional forced air systems. Additionally, the FB-5B is equipped with a user-friendly control panel, allowing for easy adjustments and settings. Its low noise operation is particularly beneficial for environments where silence is essential, such as bedrooms or offices.

The FBS-3C model takes innovation a step further by integrating smart technology into its operating system. This model is Wi-Fi enabled, allowing users to control their heating remotely via smartphone applications. The adaptability of the FBS-3C ensures that it can seamlessly integrate with smart home systems, providing a convenient and user-friendly experience. Energy monitoring features enable users to track consumption and adjust settings to optimize efficiency, ultimately reducing heating costs and environmental impact.

In conclusion, Desa's FBS-5C, FB-5B, and FBS-3C models offer a range of features that cater to different heating needs. With their focus on efficiency, safety, and smart technology, these models exemplify the future of heating solutions. Whether for a cozy home setting or a commercial application, Desa's innovative approaches ensure warmth and comfort while promoting sustainability and user convenience.
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