Bradford-White Corp M1TW40S*F, M4TW60T*F, M2TW50T*F, M4TW50T*F Eight-one flash, three Vapor Sensor

Page 14

Troubleshooting

LED Status

Control

 

Probable Cause

Service

Status

 

Procedure

 

 

 

 

 

 

 

 

 

Failed to light

1.

Unstable pilot.

1. Page 15

 

2.

Pilot tube blocked or restricted.

Six-one flash, three

pilot.

 

3.

Oxidation build up on pilot electrode.

 

second pause

System auto

2-4. Page 17

4.

Wire damage to pilot assembly or bad

 

resets.

 

 

 

connection at gas valve.

 

 

 

 

 

 

 

 

 

 

 

Pressure switch

1.

Vent blockage or improper vent configuration.

1. Check vent or vent tables.

 

 

 

or blower temp

2.

Pressure switch tubing kinked or blocked.

2 & 3 Page 18

Six-two flash, three

switch opened

3.

Faulty pressure switch.

4. Refer to venting section of

during burner

4.

Vent termination being affected by wind

second pause

installation manual

operation.

5.

Blower not spinning up to speed.

 

 

 

System auto

6.

Blower temp or exhaust temp too high

5. Page 20

 

resets.

7.

Faulty blower temperature switch.

6 & 7 Page 22

 

 

 

 

 

 

 

1.

Unstable pilot.

 

 

Pilot flame

2.

Pilot tube blocked or restricted.

1. Page 15

 

3.

Oxidation build up on pilot electrode.

 

Six-three flash, three

extinguished.

2-4. Page 17

4.

Wire damage to pilot assembly or bad

second pause

System auto

 

 

connection at gas valve.

 

 

resets.

 

5. Refer to installation manual

 

5.

Insufficient combustion air.

 

 

 

 

 

 

6.

Gas pressure is out of specification.

 

 

 

 

 

 

 

Undesired-false

 

 

 

Six-four flash, three

pilot flame

 

 

Replace gas control,

sensed.

Pilot valve stuck in open position.

second pause

page 26

System auto

 

 

 

 

 

 

 

resets.

 

 

 

Seven flash, three

Flammable

 

WARNING: EXPLOSION HAZARD

 

Vapor Sensor

• Indicates gasoline vapors were detected at potentially

Page 28

second pause

fault detected.

explosive levels.

 

• Verify no gasoline vapors are still present.

 

 

 

 

 

 

• Reset the control by cycling power to the appliance or by

 

 

 

cycling the ON/OFF switch.

 

 

 

• Replace the Flammable Vapor Sensor element if a gasoline

 

 

 

spill event occurred.

 

 

 

 

 

 

Flammable

• Very Flammable Vapor Sensor (FVS) resistance is not below

 

Eight-one flash, three

Vapor Sensor

25 KΩ.

 

out of

• Check wiring to FVS and insure it is not shorted.

Page 28

second paus

specification.

• Replace control if everything above checks out OK.

 

 

 

 

 

 

 

 

 

 

 

 

Eight-three flash, three

Thermal well

1.

Damage to thermal well wire.

Page 24

second pause

sensor damaged

2.

Thermal well sensor resistance out of range.

or unplugged

 

 

 

 

 

 

 

 

 

 

Eight-four flash, three

Gas valve fault

1.

Control needs to be reset.

1. Interrupt power supply

2. Replace gas control,

second pause

detected.

2.

Control is wet or physically damaged.

page 26

 

 

 

 

 

 

 

 

 

Page 14

Page 14

14

Page 13 Page 15
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Page 13 Page 15
Contents Service Manual Through-The-Wall Gas Water Heaters For Your Safety Introduction How to Use This Manual Specifications Vent Tables Vent Tables Control Timings Sequence of Operation Steady state operation Pressure Switch/Blower Temperature Fault Troubleshooting Eight-one flash, three Vapor Sensor Burner Inspection and Air Shutter Adjustment Burner Cleaning Pilot Inspection, Testing and Replacement Pressure Switch Testing Pressure Switch Replacement Blower Testing Pressure tapRemove exhaust Blower Temperature Switch Testing Blower Temperature Switch Replacement Gas Control Testing Thermal Well TestingDetermine Water Temperature Inside Tank Gas Control & Thermal Well Removal From Water Heater Gas Control Removal From Thermal WellGas Control Assembly to Thermal Well Flammable Vapor Device Testing Safety Circuit Voltage Trace Red wire leading to blower temperature NVAC Circuit Trace Dip Tube Inspection and Replacement Anode Inspection and Replacement Remove blower to gain access to system from exhaust Flue baffleInner Door Removal Procedure Inner Door Gasket Replacement ProcedureInstallation of Inner Door With Gasket Replace outer jacket burner access door ScreenLok Flame Arrestor Cleaning Glossary of Terms Parts List Parts@bradfordwhite.com Techserv@bradfordwhite.com

M4TW40T*F, M1TW50S*F, M2TW50T*F, M4TW50T*F, M4TW60T*F specifications

Bradford-White Corporation is a leading manufacturer of water heating and storage solutions, known for its commitment to quality and innovation. Among its impressive product lineup, the M2TW65T*F, TW465S65F, TW450S65F, M1TW40S*F, and M1TW60T*F models stand out for their reliability and advanced technology suitable for both residential and commercial applications.

The M2TW65T*F model is distinguished by its high efficiency and performance. It features a 65-gallon capacity, which is ideal for households that require a significant amount of hot water. This model is equipped with an innovative electronic ignition system that enhances energy efficiency while providing reliable hot water on demand. Additionally, it includes advanced insulation technology that minimizes heat loss, ensuring that water remains hot for extended periods.

The TW465S65F and TW450S65F are other exemplary models in the Bradford-White lineup, boasting impressive storage capabilities. Both models offer a combination of a 65-gallon tank and powerful burner systems that significantly reduce recovery time, meaning users can enjoy hot water faster. These models are designed with a user-friendly control panel, making adjustments and monitoring water temperature straightforward. Their robust construction ensures durability and longevity, making them a smart investment.

For smaller households or spaces, the M1TW40S*F and M1TW60T*F models provide excellent options without compromising performance. The M1TW40S*F, with a 40-gallon capacity, is specifically designed for efficiency in limited spaces, while the M1TW60T*F offers extra capacity for larger demands. Both models utilize Bradford-White's state-of-the-art gas burner technology, promoting energy conservation while delivering consistent hot water.

All models are built with a high-quality glass-lined tank to protect against corrosion, further enhancing their lifespan. The incorporation of Bradford-White's exclusive EverKlean technology in their tank designs minimizes sediment buildup, ensuring clean and efficient operation over time.

In addition to their standout performance and efficiency, Bradford-White products prioritize safety. Built-in safety features, such as the temperature and pressure relief valve and advanced venting designs, provide peace of mind for users. These models not only meet but often exceed industry standards for safety and efficiency.

Bradford-White's commitment to innovation and quality is reflected in the M2TW65T*F, TW465S65F, TW450S65F, M1TW40S*F, and M1TW60T*F models, making them excellent choices for anyone in need of reliable hot water solutions. With their advanced technologies, durability, and energy efficiency, these water heaters are ideal for diverse applications in modern homes and businesses.
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