Bradford-White Corp SX), D4504S*F(BN LED Status Control Status Probable Cause Service Procedure

Page 14

Troubleshooting

LED Status

Control Status

 

Probable Cause

Service Procedure

 

 

1.

Damper not in proper position

 

Six flashes,

Damper test circuit

or malfunctioning - damper

1. See Burner Inspection

not working

moved from full open position

two flashes,

on page 15

properly during

during run cycle

three second

2-4. See Pilot Inspection,

burner operation,

2.

Obstructed venting

pause (Soft

Testing and Replacement

system auto resets

3.

Faulty damper

Lockout)

after (5) minutes

4.

Damper jostled during run

on pate 17

 

 

 

 

cycle

 

 

 

1.

Unstable pilot

 

Six flashes,

 

2.

Pilot tube block or restricted

1. See Burner Inspection

 

3.

Oxidation build-up on pilot

on page 15

three

Pilot flame

electrode

2-4. See Pilot Inspection,

flashes,

extinguished,

4.

Wire damage to pilot

Testing and Replacement

three second

system auto resets

pause (Soft

after (5) minutes

assembly or bad connection at

on page 17

gas control

5. Refer to Installation &

Lockout)

 

 

5.

Insufficient combustion air

Operation Manual

 

 

 

 

6.

Insufficient gas pressure

 

Six flashes,

Undesired false

 

 

 

four flashes,

 

 

 

pilot flame sensed,

Pilot valve stuck in open position

Replace gas control

three second

pause

system auto resets

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Flammable vapor present

 

 

Flammable vapor

2. Flammable vapor sensor

 

Seven

sensor or

exposed to excessive moisture

 

flashes,

resettable thermal

3.

Flammable vapor sensor

See Flammable Vapor

three second

switch fault

exposed to extreme ambient

Sensor Testing on page 27

pause

detected, see

temperature

 

 

warning label

4.

Resettable thermal switch

 

 

 

open

 

 

 

1.

Flammable vapor sensor out

 

Eight

Flammable vapor

of specification; verify Flammable

 

flashes, one

Vapor Sensor (FVS) resistance is

 

sensor out of

See Flammable Vapor

flash, three

specification,

not below 25 kŸ.

Sensor Testing on page 27

second

2.

Possible short in flammable

possible short

 

pause

vapor sensor or resettable

 

 

 

 

 

thermal switch wiring

 

 

 

1.

Damage to thermal well wires

 

Eight

 

2.

Thermal well sensor

 

Thermal well sensor

resistance out of range

 

flashes,

 

damaged or

3.

Replace thermal well

 

three

See Thermal Well Testing

unplugged or gas

4.

Verify control is not wet or

flashes,

on page 21

control electronics

physically damaged

three second

 

pause

fault detected

5.

Reset control on/off switch

 

 

6.

Replace gas control if 8-3 error

 

 

 

 

 

 

persists

 

 

 

 

 

 

Eight

 

1.

Verify control is not wet or

1. Replace gas control if

flashes, four

 

physically damaged

Gas control fault

wet or physically damaged

flashes,

2.

Reset control on/off switch

detected

2. Cycle power

three second

3.

Replace gas control if 8-4 error

pause

 

persists

3. Replace gas control

 

 

 

 

 

 

 

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Contents Service Manual Table of Contents Page Page Introduction Bradford White Defender Safety SystemHow the Safety System Works IntroductionHow to Use this Manual How to Use this ManualSpecifications Wiring Diagram Sequence of Operation Power Up SequenceDamper Powered Open Normal Heating SequenceNormal Heating Sequence cont’d Trial for Ignition Fault Abnormal Operation cont’d Temperature Sensor FaultDamper Safety Circuit Fault Abnormal Operation cont’d Flame Sensing Fault Troubleshooting Probable Cause Service ProcedureLED Status Control Status Probable Cause Service Procedure Burner Inspection Burner MaintenanceBurner Cleaning Procedure Right side inner door Main burner Orifice Pilot Inspection, Testing and Replacement Pilot MaintenanceBurner Cleaning Procedure cont’d Pilot Inspection, Testing and Replacement cont’d Damper Replacement Damper Removal & InstallationDamper Removal & Installation cont’d Thermal Well Testing Thermal Well TestingDetermine Water Temperature Inside Tank Determine Tank TemperatureThermal Well Testing cont’d Gas Control & Thermal Well Removal From Water Heater Component DisassemblySensor Resistance at Various Temperatures Gas Control Removal From Thermal Well Gas Control RemovalGas Control & Thermal Well Removal From Water Heater cont’d Gas Control Removal From Thermal Well cont’d Gas Control AssemblyGas Control Assembly to the Thermal Well Gas Control Assembly to the Thermal Well cont’d VAC Circuit Trace Flammable Vapor Sensor TestingFlammable Vapor Sensor Testing Dip Tube Inspection and Replacement Dip Tube InspectionAnode Inspection and Replacement Anode InspectionRemove the Damper to Gain Access to the Flue Baffle Damper RemovalRemove the Damper to Gain Access to the Flue Baffle cont’d Inner Door Removal Procedure Inner Door RemovalInner Door Gasket Replacement Procedure Inner Door Gasket ReplacementInner Door Removal Procedure cont’d Inner Door Installation Inner Door Installation with GasketDamper Relay Installation Arrestor CleaningScreenLok Flame Arrestor Cleaning Procedure Damper Relay Installation Damper Relay Installation cont’dConnect the other ends of the relay harness, as shown Common Terms Common TermsParts List Part Name and DescriptionParts@bradfordwhite.com Techserv@bradfordwhite.com

SX), D4504S*F(BN, D4403S*F(BN specifications

Bradford-White Corp has long been a pioneering name in the water heating industry, and their D4403S*F(BN, D4504S*F(BN, and SX models represent the company’s commitment to delivering high-quality, efficient solutions for residential and commercial applications. These water heaters are designed with various user needs in mind, ensuring that homeowners and businesses can enjoy a reliable hot water supply whenever needed.

One of the core features of these models is their advanced water heating technology. Utilizing power venting systems, these units ensure efficient heat transfer while minimizing heat loss. This technology promotes energy efficiency and helps users save on their energy bills. The power vent system also allows for flexible installation options, accommodating different types of venting configurations, which is especially useful in homes with unique designs or limited space.

The Bradford-White D4403S*F(BN and D4504S*F(BN models are equipped with their state-of-the-art Hydrojet Total Performance System. This feature not only enhances the heater's overall performance but also reduces sediment buildup within the tank, which can significantly extend the unit's lifespan and maintain efficiency over time. Moreover, the patented Vitraglas® lining protects the inner tank from corrosion, further prolonging the life of the appliance.

Safety is a paramount consideration in Bradford-White's design philosophy. Each model includes a robust Flammable Vapor Ignition Resistance (FVIR) system, which helps prevent the ignition of flammable vapors that may be present in the vicinity of the water heater. This feature meets stringent safety standards and provides peace of mind to users.

In terms of energy specifications, both the D4403S*F(BN and D4504S*F(BN models are designed to meet or exceed efficiency standards, contributing to lower energy consumption and environmental impact. The SX model is particularly notable for its user-friendly digital display and controls, allowing for easy temperature adjustments and efficient operation monitoring.

In conclusion, Bradford-White Corp's D4403S*F(BN, D4504S*F(BN, and SX models are a testament to the company’s dedication to quality, safety, and efficiency in water heating technology. With their innovative features, user-friendly design, and long-lasting durability, these water heaters are well-suited to meet the ever-evolving demands of modern households and commercial settings alike. As homeowners and businesses continue seeking reliable hot water solutions, Bradford-White stands out as a trusted choice in the industry.
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