Bradford-White Corp PE440T*F(BN,SX), PE4503*F(BN,SX), PE4403S*F(BN,SX) Troubleshooting

Page 13

Troubleshooting

Note: The Troubleshooting section replaces pages 4-6 in the Defender Atmospheric service manual, p/n 238-44943-00.

Observe the green LED on the water heater gas control. Diagnostic codes are displayed with a 3 second pause before repeating. Once the diagnostic code is known, check and repair the water heater, as recommended in the table below.

Green LED

LED Status

Control Status

Probable Cause

Service Procedure

None (LED

Electrical power not

Control power switch in "OFF"

Turn Power On

not on or

present

position.

flashing)

Supply voltage interrupted.

 

 

 

One short

Stand-by mode,

Temperature demand is satisfied

 

flash every

Thermostat is

Normal operation

four seconds

satisfied (no faults)

(no call for heat)

 

Alternates

 

 

 

bright and

Thermostat calling

Tank temperature below

Normal operation

dim

for heat (no fault)

setpoint of thermostat

 

(heartbeat)

 

 

 

 

 

1. Unstable pilot

 

 

 

2. Pilot tube blocked or restricted

1. See Burner Inspection on

Short flash

Weak pilot signal

3. Oxidation build-up on pilot

page 17

once every

electrode

2-4. See Pilot Inspection,

second

on last call for heat

4. Wire damage to pilot

Testing and Replacement on

 

 

assembly or bad connection at

page 19

 

 

gas control

 

 

 

 

 

Two flashes,

 

 

1. Verify cord sets are fully

 

 

plugged in

three second

Relay not working

Faulty relay

2. See Relay Replacement on

pause

 

 

 

 

page 28

 

 

 

Three

 

 

1. Verify cord sets are fully

flashes,

Relay not working

Faulty relay

plugged in

three second

2. See Relay Replacement on

pause

 

 

page 28

 

 

 

 

Four flashes,

Excessive tank

1. Thermal well sensor out of

1. Test Gas Control & Thermal

temperature,

Well

three second

calibration

system must be

2. Replace gas control if

pause

2. Faulty gas control

reset

necessary

 

 

Five flashes,

False pilot flame

 

 

three second

Pilot valve stuck in open position

Replace gas control

present

pause

 

 

 

 

 

 

 

 

 

 

 

1. Unstable pilot

 

Six flashes,

 

2. Pilot tube block or restricted

1. See Burner Inspection on

one flash,

Failed to light pilot,

3. Oxidation build-up on pilot

page 17

three second

system resets after

electrode

2-4. See Pilot Inspection,

pause (Soft

(5) minutes

4. Wire damage to pilot

Testing and Replacement on

Lockout)

 

assembly or bad connection at

page 19

 

 

gas valve

 

 

 

 

Page 13

13

Image 13
Contents Service Manual Table of Contents Page Page Introduction Bradford White Defender Safety SystemHow to Use this Manual How to Use this ManualSpecifications SpecificationsControl Timings Sequence of Operation Power Up SequenceNormal Heating Sequence Relay EnergizedNormal Heating Sequence cont’d Safety Circuit Fault Abnormal Operation cont’d Temperature Sensor FaultTrial for Ignition Fault Abnormal Operation cont’d Flame Sensing Fault LED Status Control Status Probable Cause Service Procedure TroubleshootingTroubleshooting Gas Valve / Control Model LED Status Accessory Module Probable Cause Burner Cleaning Procedure Burner MaintenanceBurner Inspection Unscrew the burner from the main burner orifice Pilot Inspection, Testing, and Replacement Burner Cleaning Procedure cont’dPilot Inspection, Testing, and Replacement cont’d Pilot MaintenanceThermal Well Testing Thermal Well Testing cont’d Thermal Well TestingDetermine Water Temperature Inside Tank Determine Water Temperature Inside Tank cont’d Determine Tank TemperatureSensor Resistance at Various Temperatures Gas Control & Thermal Well Removal From Water Heater Component DisassemblyGas Control Removal From Thermal Well Gas Control RemovalGas Control Removal From Thermal Well cont’d Gas Control Assembly to the Thermal WellGas Control Assembly to the Thermal Well cont’d Gas Control AssemblyFlammable Vapor Sensor Testing Flammable Vapor Sensor Testing cont’d Flammable Vapor Sensor TestingRelay Replacement VAC Circuit TraceRelay Replacement cont’d Relay ReplacementCommon Terms Common TermsPart Name and Description Parts ListParts@bradfordwhite.com Techserv@bradfordwhite.com

PE4403S*F(BN,SX), PE440T*F(BN,SX), PE4503*F(BN,SX), PE2XR504T*F(BN,SX) specifications

Bradford-White Corporation is a renowned manufacturer of water heating and storage products, well-regarded for its commitment to quality and innovation. Among its diverse product lineup, the PE2XR504T*F(BN,SX), PE4503*F(BN,SX), PE440T*F(BN,SX), and PE4403S*F(BN,SX) models stand out for their technology, efficiency, and performance. These commercial electric water heaters are designed for demanding applications, making them ideal for various settings, including restaurants, hotels, and industrial facilities.

One of the most notable features across these models is the use of advanced heating elements, which are engineered to provide rapid recovery and consistent hot water temperatures. This capability ensures that businesses can rely on a continuous supply of hot water, particularly during peak demand periods. The tanks are constructed with high-quality materials that guarantee durability and longevity, reducing the need for frequent replacements.

Another key feature is the digital temperature control system, which allows users to easily set and maintain the desired water temperature with precision. This technology not only enhances user convenience but also contributes to energy efficiency, allowing businesses to operate within sustainable parameters while minimizing energy costs. Additionally, certain models are equipped with Bradford-White’s patented Hydrojet® Total Performance System, which promotes superior tank cleaning and reduces sediment buildup, thereby improving efficiency and prolonging the life of the heater.

Safety is paramount in the design of these units. The incorporation of advanced safety features, including a self-resetting thermal cutoff and a high limit switch, helps protect against overheating. Furthermore, these models are built with a robust insulation system, which reduces heat loss and improves overall energy efficiency.

In terms of versatility, the PE2XR504T*F(BN,SX), PE4503*F(BN,SX), PE440T*F(BN,SX), and PE4403S*F(BN,SX) can be easily integrated into existing plumbing systems. They are available in various capacities and configurations, catering to a wide range of commercial needs. With their combination of cutting-edge technology, reliability, and safety features, these Bradford-White models are an excellent investment for any commercial establishment seeking efficient and dependable hot water solutions.