Bradford-White Corp M2TW65T*F, M4TW60T*F, M2TW50T*F, M4TW50T*F, M1TW40S*F, M1TW50S*F Troubleshooting

Page 13

Troubleshooting

Observe green LED indicator on Electronic gas control. Error flash codes are displayed with a three second pause before repeating. Check and repair the system as noted in the troubleshooting table below.

Green LED

Indicator

 

LED Status

Control

 

Probable Cause

Service

 

 

Status

 

Procedure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

None, control LED not

No electrical

Control power switch in “OFF” position.

Turn power on

 

 

on or flashing

power

Supply voltage interrupted.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Short flash, once every

Stand-by mode,

 

 

Normal operation.

 

 

Waiting for call for

Temperature demand is satisfied

Adjust thermostat to

 

 

four seconds

heat (no fault).

 

 

temp level

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

“Heartbeat”, alternates

Thermostat calling

 

 

Normal operation.

 

 

Tank temperature below set point of thermostat.

Adjust thermostat to

 

 

bright/dim

for heat (no fault).

 

 

temp level

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Unstable pilot.

1. Page 15

 

 

 

 

Weak pilot signal

2.

Pilot tube block or restricted.

 

 

Short flash once per

 

 

 

 

 

on last call for

3.

Oxidation build up on pilot electrode.

 

 

 

 

 

second

2-4. Page 17

 

 

heat.

4.

Wire damage to pilot assembly or bad

 

 

 

 

 

 

 

 

 

 

 

 

 

connection at gas valve.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Two flash, three

Pressure switch

1.

Pressure switch tubing kinked or blocked.

 

 

 

 

 

not working-

2.

Blocked pressure tap on switch or blower.

Page 18

 

 

second pause

 

 

closed position.

3.

Faulty pressure switch.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Vent blockage or improper vent configuration.

1. Check vent or vent tables.

 

 

 

 

Pressure switch

2.

Pressure switch tubing kinked or blocked.

 

 

 

 

 

Three flash, three

or blower temp.

3.

Faulty pressure switch.

2 & 3 Page 18

 

 

 

 

 

 

 

second pause

switch not working

4.

Blower not spinning up to speed.

4. Page 20

 

 

 

 

 

 

 

 

 

 

 

-open position.

5.

Blower temp or exhaust temp too high

 

 

 

 

 

 

 

 

6.

Faulty blower temperature switch.

5 & 6 Page 22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Excessive tank

1.

Thermal well sensor out of calibration.

1. Page 24

 

 

 

 

 

 

 

 

 

Four flash, three

temperature.

2.

Faulty gas control.

 

 

 

 

 

second pause

System must be

3.

Pluming leak.

2. Replace gas control,

 

 

 

 

reset. (See Pg. 24)

4.

Tank not filled with water.

page 24

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Five flash, three

Undesired-false

 

 

Replace gas control,

 

 

pilot flame

1.

Pilot valve stuck in open position.

 

 

second pause

page 24

 

 

present.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 13

 

 

 

 

 

 

 

Page 13

 

 

 

 

 

 

 

 

13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Image 13
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 Pressure tap Blower TestingRemove exhaust Blower Temperature Switch Testing Blower Temperature Switch Replacement Thermal Well Testing Gas Control TestingDetermine Water Temperature Inside Tank Gas Control Removal From Thermal Well Gas Control & Thermal Well Removal From Water HeaterGas Control Assembly to Thermal Well Flammable Vapor Device Testing Red wire leading to blower temperature N Safety Circuit Voltage TraceVAC Circuit Trace Dip Tube Inspection and Replacement Anode Inspection and Replacement Flue baffle Remove blower to gain access to system from exhaustInner Door Gasket Replacement Procedure Inner Door Removal 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.