Bradford-White Corp
D-38T-155
service manual
Parts@bradfordwhite.com Techserv@bradfordwhite.com
Troubleshooting
Specifications
Parts list
Error codes
Service Procedure D24-I
Displaying temperature Sensors
Pilot Operation Testing
Control Board Replacement
Service Manual
Build-up causing restriction
Page 44
Email
parts@bradfordwhite.com
techserv@bradfordwhite.com
www.bradfordwhite.com
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Page 44
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Page 44
Contents
Service Manual
To be performed only by qualified service providers
Table of Contents
Features of Honeywell Integrated Controls System
Tools Required for Service
Specifications
Sequence of Operation
Lockout Condition
Troubleshooting
Pins to black and white wires
Voltage at primary pins 1&3 white
Defective
Displaying temperature Sensors
Example of error code shown on control display
From 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 Temperature
To Display and Change Temperature Setpoint
To Display Flame Sense Current of the Pilot Flame Sensor
Setpoint Flashes
Selectset
Idle Status Operational
Error Codes and Error History Display
Error Code History
To view previous error codes
ExitingSELECTServiceSET Mode
Error Code Definitions
Error Code Shown Water Heater Display
Press for 3 seconds to reset control in service mode
Service Procedure D24-I
Thermostat Circuit Testing
Do not reset the display from the hard lockout
State without correcting the cause
Service Procedure D24-I
Upper thermister location Applicable models
Upper Sensor
Lower Sensor
131
Service Procedure D24-II
Pilot Operation Testing
Pilot Inspection
Micro-amp readings Meter
Probe
Meter Probe
Micro Amp =
114
Service Procedure D24-III
Main Burner Operation Testing
Build-up causing restriction
Heater. Refer to Installation Instructions
See Pilot Inspection section
Inspection
Service Procedure D24-IV
Main Burner & Pilot Removal and Inspection
Main Burner Removal
Main Burner Inspection
Pilot Burner Removal
Pilot Burner Inspection
Flame Rod
Ferrule Nut
To remove lower sensor
Control Board Replacement
Control board replacement
Service Procedure D24-V
Flue Baffle Removal, Inspection
Service Procedure D24-VI
Approximate Anode Rod Locations
Generic Parts List
15A 16/16A 17/17A
13A 14A 16A 17A6A 11A 10A 18A 15A 19A 12A 20A
19B 20B 17B18B 16B 12B10B 13B
14B 15B
BTU/H
CO2
ECO
GFI
Page
Page
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