Bradford-White Corp D-38T-155 service manual From previous, Operate?, Pilot Will Not Light

Page 8

Troubleshooting

CAUTION

Use Caution Not to Damage Connectors when making Voltage Measurements or Jumping Terminals

From previous page

Does damper blade move to the full

open position?

Y

Is there pilot flame?

Y

Does Main Burner operate?

Y

 

Error code #55 on display.

 

 

 

N

Remove damper from heater and

 

Does water heater begin to

 

jump black & yellow wires of

 

 

 

operate?

 

heater harness. Refer to photo on

 

 

 

 

 

 

this page.

 

 

Y

 

 

 

 

 

 

 

N

Error code #62 on display. See

 

Check for debris limiting damper

 

 

 

“Pilot Will Not Light”.

 

rotation. If no debris, replace

 

 

 

damper.

N

Error code #62 on display. See

 

 

 

 

 

 

 

 

“Pilot Lights, No Flame Signal”

 

 

 

Does burner continue until

thermostat set point is reached?

See setting display in Service Mode

and displaying temperature

sensors.

Y

Does the flue damper rotate to the

fully closed position?

Y

System okay

N

Error code #63 on display. See

 

 

“Main Burner Short Cycles”.

N

Error code #56 on display.

Check for debris limiting damper

 

 

rotation. If no debris, replace

 

damper

Damper vane show in open position. If damper

is closed, disconnect from harness and REMOVE damper from water heater.

6

Harness shown disconnected from damper with BLACK and YELLOW wires jumped.

Error Code Shown

in Water Heater Display

Status Service Needed

SELECT Lockout RESET

Example of error code shown on control display.

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Contents Service Manual To be performed only by qualified service providersTable of Contents Features of Honeywell Integrated Controls System Tools Required for Service Specifications Sequence of Operation Lockout ConditionTroubleshooting Pins to black and white wiresVoltage at primary pins 1&3 white DefectiveDisplaying temperature Sensors Example of error code shown on control displayFrom previous Operate?Using Control Display for Servicing Water Heater Sensor is used Setpoint Display/Change Software Version Display only Select SET ExitingSELECTServiceSETMode Display of Water TemperatureTo Display and Change Temperature Setpoint To Display Flame Sense Current of the Pilot Flame SensorSetpoint Flashes Selectset Idle Status Operational Error Codes and Error History Display Error Code HistoryTo view previous error codes ExitingSELECTServiceSET Mode Error Code Definitions Error Code Shown Water Heater Display Press for 3 seconds to reset control in service modeService Procedure D24-I Thermostat Circuit TestingDo not reset the display from the hard lockout State without correcting the causeService Procedure D24-I Upper thermister location Applicable models Upper SensorLower Sensor 131 Service Procedure D24-IIPilot Operation Testing Pilot Inspection Micro-amp readings Meter ProbeMeter Probe Micro Amp =114 Service Procedure D24-IIIMain Burner Operation Testing Build-up causing restriction Heater. Refer to Installation InstructionsSee Pilot Inspection section InspectionService Procedure D24-IV Main Burner & Pilot Removal and InspectionMain Burner Removal Main Burner InspectionPilot Burner Removal Pilot Burner InspectionFlame Rod Ferrule NutTo remove lower sensor Control Board ReplacementControl board replacement Service Procedure D24-V Flue Baffle Removal, InspectionService Procedure D24-VI Approximate Anode Rod Locations Generic Parts List 15A 16/16A 17/17A13A 14A 16A 17A6A 11A 10A 18A 15A 19A 12A 20A 19B 20B 17B18B 16B 12B10B 13B 14B 15BBTU/H CO2ECO GFIPage Page Parts@bradfordwhite.com Techserv@bradfordwhite.com