Bradford-White Corp D-38T-155 service manual Sensor is used

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Troubleshooting

1. Max Setpoint (Display/Change)

 

Max Setpoint value in

 

 

Water Heater Display

°F

Max

 

 

Setpoint

 

idle

 

 

Status Operational

 

 

2a. Water Temperature Average (Displays&average ifSELECTthere are twoSET

sensors - sensor temperature displayed if single

sensor is used).

 

 

°F Water Temp

idle

Status Operational

SELECTSET

2b. Water Temperature - Upper Sensor (Displays if there is an upper sensor - some models)

°F

idle

Status Operational Upper Sensor

SELECTSET

2c. Water Temperature - Lower Sensor (Displays if there are two sensors)

°F

idle

Status Operational

Lower Sensor

SELECTSET

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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 ConditionVoltage at primary pins 1&3 white TroubleshootingPins to black and white wires DefectiveFrom previous Displaying temperature SensorsExample of error code shown on control display 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 modeDo not reset the display from the hard lockout Service Procedure D24-IThermostat Circuit Testing State without correcting the causeService Procedure D24-I Lower Sensor Upper SensorUpper thermister location Applicable models Pilot Operation Testing Service Procedure D24-II131 Pilot Inspection Meter Probe Micro-amp readings MeterProbe Micro Amp =Main Burner Operation Testing Service Procedure D24-III114 See Pilot Inspection section Build-up causing restrictionHeater. Refer to Installation Instructions InspectionMain Burner Removal Service Procedure D24-IVMain Burner & Pilot Removal and Inspection Main Burner InspectionFlame Rod Pilot Burner RemovalPilot Burner Inspection Ferrule NutControl board replacement Control Board ReplacementTo remove lower sensor 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 15BECO BTU/HCO2 GFIPage Page Parts@bradfordwhite.com Techserv@bradfordwhite.com