Bradford-White Corp
D-38T-155
service manual
Troubleshooting
Specification
Parts list
Error codes
Service Procedure D24-I
Displaying temperature Sensors
Pilot Operation Testing
Control Board Replacement
Service Manual
Build-up causing restriction
Page 42
NOTES
Page 41
Page 43
Image 42
Page 41
Page 43
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
Voltage at primary pins 1&3 white
Troubleshooting
Pins to black and white wires
Defective
From previous
Displaying temperature Sensors
Example 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 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
Do not reset the display from the hard lockout
Service Procedure D24-I
Thermostat Circuit Testing
State without correcting the cause
Service Procedure D24-I
Upper Sensor
Lower Sensor
Upper thermister location Applicable models
Service Procedure D24-II
Pilot Operation Testing
131
Pilot Inspection
Meter Probe
Micro-amp readings Meter
Probe
Micro Amp =
Service Procedure D24-III
Main Burner Operation Testing
114
See Pilot Inspection section
Build-up causing restriction
Heater. Refer to Installation Instructions
Inspection
Main Burner Removal
Service Procedure D24-IV
Main Burner & Pilot Removal and Inspection
Main Burner Inspection
Flame Rod
Pilot Burner Removal
Pilot Burner Inspection
Ferrule Nut
Control Board Replacement
Control board replacement
To remove lower sensor
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
ECO
BTU/H
CO2
GFI
Page
Page
Parts@bradfordwhite.com Techserv@bradfordwhite.com
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