Bradford-White Corp C)*(N, PDX75S70F(B, CX), PDX65S65F(B, PDX50S60F(B Troubleshooting LED Status

Page 13

PDX Series

Troubleshooting

LED Status

 

Control

 

 

Probable Cause

 

Service

 

 

 

 

 

 

 

 

 

 

Status

 

 

Procedure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Failed to light

1.

Unstable pilot.

1. Page 14

 

 

 

2.

Pilot tube blocked or restricted.

Six-one flash, three

pilot.

 

 

 

 

 

3.

Oxidation build up on pilot electrode.

2-4. Page 16

second pause

System auto

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 17

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 21

 

 

 

resets.

7.

Faulty blower temperature switch.

6 & 7 Page 23

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Unstable pilot.

 

 

 

 

 

 

 

 

Pilot flame

2.

Pilot tube blocked or restricted.

1. Page 14

 

 

 

3.

Oxidation build up on pilot electrode.

 

 

 

 

 

Six-three flash, three

extinguished.

2-4. Page 16

4.

Wire damage to pilot assembly or bad

second pause

System auto

 

 

 

 

 

 

connection at gas valve.

5. Refer to installation manual

 

 

 

resets.

 

 

 

 

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 27

System auto

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

resets.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WARNING: EXPLOSION HAZARD

 

 

 

 

 

 

 

 

 

 

 

* Indicates gasoline vapors were detected at potentially

 

 

 

 

 

Seven flash, three

Flammable Vapor

 

explosive levels.

 

 

 

 

 

* Verify no gasoline vapors are still present

Page 29

second pause

Sensor fault

* Reset the control by cycling power to the appliance or

 

 

 

detected

 

by cycling the ON/OFF switch.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

* Replace the Flammable Vapors Sensor element if a

 

 

 

 

 

 

 

 

 

 

 

gasoline spill event occurred.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Eight-one flash, three

Flammable Vapor

* Verify Flammable Vapor Sensor (FVS) resistance is

 

 

 

 

 

Sensor out of

 

not below 25 K Ohms.

Page 29

second pause

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

specification.

 

 

 

 

 

 

 

 

* Replace control if everything above checks out OK.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thermal well

1.

Damage to thermal well wire.

Page 25

 

 

 

sensor damaged

 

 

 

2.

Thermal well sensor resistance out of range.

Eight-three flash, three

or unplugged

 

 

 

 

 

 

 

 

 

 

 

 

 

 

second pause

Gas valve

1.

Control needs to be reset.

1. Interrupt power supply

 

 

 

electronics fault

2. Replace gas control,

 

 

 

2.

Control is wet or physically damaged.

 

 

 

detected

page 27

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Eight-four flash, three

Gas valve fault

1.

Control needs to be reset.

1. Interrupt power supply

second pause

detected.

2.

Control is wet or physically damaged.

2. Replace gas control,

page 27

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 13

13

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Contents Denotes Warranty Years Service ManualTable of Contents PDX Series Introduction How to Use This Manual Tools Required for ServiceSpecifications PDX Series Control Timings Sequence of Operation Power up SequenceAbnormal Operation Pressure Switch/Blower Temperature Fault Probable Cause Service Status Procedure TroubleshootingGreen LED Indicator LED StatusTroubleshooting LED Status Cast Iron Burner Air Shutter Adjustment Burner Inspection and Air Shutter AdjustmentAir Shutter Nut Burner Surface area Feedline nut Pilot tubing nut Port area Burner CleaningIgniter/flame Sense wire Pilot Inspection, Testing and ReplacementFeedline nut Pilot tubing nut Ferrule OrificeVolt potential exposure. Use caution Exhaust Pressure Switch TestingMaking voltage checks to avoid personal injury Slide pressure switch in direction Exhaust Pressure Switch ReplacementFrom blower housing To avoid personal injurySwitch for blockage Is there blockage? Inlet Pressure SwitchTo call for heat, this will start the blower SeeRemove screws Inlet Pressure Switch ReplacementVolt potential exposure. Use caution when Blower TestingBlower removal Blower InstallationRemove exhaust Blower Cord Sets Blower Mounting ScrewsBlower Temperature Switch Testing Blower Temperature Switch Replacement Thermal Well Testing Gas Control TestingIf Control has gone into TCO lockout due to Sensor Resistance at Various Temperatures Determine Water Temperature Inside TankGas Control Removal From Thermal Well Gas Control & Thermal Well Removal From Water HeaterGas Control Assembly to Thermal Well Flammable Vapor Device Testing Safety Circuit Voltage Trace VAC Circuit Trace Wires as shown ControlShown in photo Across black & white YDip Tube Inspection and Replacement Anode Inspection and Replacement Flue baffle Inner Door Removal Procedure Installation of Inner Door With Gasket Installation of inner door with gasket from Glossary of Terms Parts List Parts@bradfordwhite.com Techserv@bradfordwhite.com
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Manual 28 pages 24.42 Kb