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

Page 14

Troubleshooting

LED Status

Control Status

 

Probable Cause

Service Procedure

Six flashes,

Relay not working

 

 

 

two flashes,

properly during

 

 

See Relay Replacement on

three second

burner operation,

Faulty relay

page 28

pause (Soft

system auto resets

 

 

 

 

 

Lockout)

after (5) minutes

 

 

 

 

 

 

 

 

 

 

1.

Unstable pilot

 

Six flashes,

 

2.

Pilot tube block or restricted

1. See Burner Inspection

 

3.

Oxidation build-up on pilot

on page 17

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 19

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

 

 

 

 

 

 

 

Page 14

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Contents Service Manual Table of Contents Page Page Bradford White Defender Safety System IntroductionHow to Use this Manual How to Use this ManualSpecifications SpecificationsControl Timings Normal Heating Sequence Power Up SequenceSequence of Operation Relay EnergizedNormal Heating Sequence cont’d Trial for Ignition Fault Abnormal Operation cont’d Temperature Sensor FaultSafety Circuit Fault Abnormal Operation cont’d Flame Sensing Fault Troubleshooting LED Status Control Status Probable Cause Service ProcedureTroubleshooting Gas Valve / Control Model LED Status Accessory Module Probable Cause Burner Inspection Burner MaintenanceBurner Cleaning Procedure Unscrew the burner from the main burner orifice Burner Cleaning Procedure cont’d Pilot Inspection, Testing, and ReplacementPilot Maintenance Pilot Inspection, Testing, and Replacement cont’dThermal Well Testing Determine Water Temperature Inside Tank Thermal Well TestingThermal Well Testing cont’d Sensor Resistance at Various Temperatures Determine Tank TemperatureDetermine Water Temperature Inside Tank cont’d Component Disassembly Gas Control & Thermal Well Removal From Water HeaterGas Control Removal Gas Control Removal From Thermal WellGas Control Assembly to the Thermal Well Gas Control Removal From Thermal Well cont’dFlammable Vapor Sensor Testing Gas Control AssemblyGas Control Assembly to the Thermal Well cont’d Relay Replacement Flammable Vapor Sensor TestingFlammable Vapor Sensor Testing cont’d VAC Circuit TraceRelay Replacement Relay Replacement cont’dCommon Terms Common TermsParts List Part Name and DescriptionParts@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.