Bradford-White Corp D-38T-155 service manual Setpoint Display/Change

Page 11

Troubleshooting

3.Flame Current of Pilot Flame Sensor (Displays only in the Heating Cycle)

	ȝA
Heating	Flame Current
Status Operational
SELECT	SET

4. Setpoint (Display/Change)

°F setpoint

idle

Status Operational

SELECTSET

5.°F/°C (Display/Change)

°F °F/C° setpoint

idle

Status Operational

SELECTSET

6.Differential (Display only - shows the differential of the thermostat)

°F Differential

idle

Status Operational

SELECTSET

Page 11

11

Image 11

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 thermister location Applicable models Upper SensorLower Sensor 131 Service Procedure D24-IIPilot Operation Testing Pilot Inspection Micro Amp = Micro-amp readings MeterProbe Meter Probe114 Service Procedure D24-IIIMain Burner Operation Testing 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 RodTo remove lower sensor Control Board ReplacementControl board replacement 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