Bradford-White Corp D-38T-155 To Display Flame Sense Current of the Pilot Flame Sensor

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Troubleshooting

Step 3: For water heaters using two temperature sensors, pressing the “Select” button again displays the Lower Sensor temperature reading. “Lower Sensor” will be displayed in the lower left side of the status window of the water heater display.

°F

idle

Status Operational

Lower Sensor

SELECTSET

To Display Flame Sense Current of the Pilot Flame Sensor:

The pilot flame sense current is available only when the burners are in operation. Step 1: Make sure the status displays

“Heating” or draw enough hot water to start the burners. Step 2: Enter the “Service Mode” described previously. Step 3: Press the “Select” button until a number value is displayed with “Flame Current” to the right of the number. The value displayed is in microamps (ȝA).

Flame

Current

ȝA

Heating

Status Operational

SELECTSET

To Display and Change Temperature Setpoint:

Step 1: In “Service Mode” press the “Select” button until “Setpoint” is shown in the water heater display

°F setpoint

idle

Status Operational

SELECTSET

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Contents To be performed only by qualified service providers Service ManualTable of Contents Features of Honeywell Integrated Controls System Tools Required for Service Specifications Lockout Condition Sequence of OperationDefective TroubleshootingPins to black and white wires Voltage at primary pins 1&3 whiteOperate? Displaying temperature SensorsExample of error code shown on control display From previousUsing Control Display for Servicing Water Heater Sensor is used Setpoint Display/Change Software Version Display only Select SET Display of Water Temperature ExitingSELECTServiceSETModeTo Display Flame Sense Current of the Pilot Flame Sensor To Display and Change Temperature SetpointSetpoint Flashes Selectset Idle Status Operational Error Code History Error Codes and Error History DisplayTo view previous error codes ExitingSELECTServiceSET Mode Error Code Definitions Press for 3 seconds to reset control in service mode Error Code Shown Water Heater DisplayState without correcting the cause Service Procedure D24-IThermostat Circuit Testing Do not reset the display from the hard lockoutService Procedure D24-I Upper Sensor Lower SensorUpper thermister location Applicable models Service Procedure D24-II Pilot Operation Testing131 Pilot Inspection Micro Amp = Micro-amp readings MeterProbe Meter ProbeService Procedure D24-III Main Burner Operation Testing114 Inspection Build-up causing restrictionHeater. Refer to Installation Instructions See Pilot Inspection sectionMain Burner Inspection Service Procedure D24-IVMain Burner & Pilot Removal and Inspection Main Burner RemovalFerrule Nut Pilot Burner RemovalPilot Burner Inspection Flame RodControl Board Replacement Control board replacementTo remove lower sensor Flue Baffle Removal, Inspection Service Procedure D24-VService Procedure D24-VI Approximate Anode Rod Locations 15A 16/16A 17/17A Generic Parts List13A 14A 16A 17A6A 11A 10A 18A 15A 19A 12A 20A 14B 15B 19B 20B 17B18B 16B 12B10B 13BGFI BTU/HCO2 ECOPage Page Parts@bradfordwhite.com Techserv@bradfordwhite.com