Bradford-White Corp
D-38T-155
service manual
Approximate Anode Rod Locations
Troubleshooting
Specs
Parts list
Error messages
Service Procedure D24-I
Displaying temperature Sensors
Pilot Operation Testing
Control Board Replacement
Service Manual
Build-up causing restriction
Page 37
SERVICE PROCEDURE
D24-VI
Anode Removal and Inspection
Approximate Anode Rod Locations
Page 37
37
Page 36
Page 38
Image 37
Page 36
Page 38
Contents
To be performed only by qualified service providers
Service Manual
Table of Contents
Features of Honeywell Integrated Controls System
Tools Required for Service
Specifications
Lockout Condition
Sequence of Operation
Pins to black and white wires
Troubleshooting
Voltage at primary pins 1&3 white
Defective
Example of error code shown on control display
Displaying temperature Sensors
From previous
Operate?
Using Control Display for Servicing Water Heater
Sensor is used
Setpoint Display/Change
Software Version Display only
Select SET
Display of Water Temperature
ExitingSELECTServiceSETMode
To Display Flame Sense Current of the Pilot Flame Sensor
To Display and Change Temperature Setpoint
Setpoint Flashes
Selectset
Idle Status Operational
Error Code History
Error Codes and Error History Display
To view previous error codes
ExitingSELECTServiceSET Mode
Error Code Definitions
Press for 3 seconds to reset control in service mode
Error Code Shown Water Heater Display
Thermostat Circuit Testing
Service Procedure D24-I
Do not reset the display from the hard lockout
State without correcting the cause
Service Procedure D24-I
Lower Sensor
Upper Sensor
Upper thermister location Applicable models
Pilot Operation Testing
Service Procedure D24-II
131
Pilot Inspection
Probe
Micro-amp readings Meter
Meter Probe
Micro Amp =
Main Burner Operation Testing
Service Procedure D24-III
114
Heater. Refer to Installation Instructions
Build-up causing restriction
See Pilot Inspection section
Inspection
Main Burner & Pilot Removal and Inspection
Service Procedure D24-IV
Main Burner Removal
Main Burner Inspection
Pilot Burner Inspection
Pilot Burner Removal
Flame Rod
Ferrule Nut
Control board replacement
Control Board Replacement
To remove lower sensor
Flue Baffle Removal, Inspection
Service Procedure D24-V
Service Procedure D24-VI
Approximate Anode Rod Locations
15A 16/16A 17/17A
Generic Parts List
13A 14A 16A 17A6A 11A 10A 18A 15A 19A 12A 20A
14B 15B
19B 20B 17B18B 16B 12B10B 13B
CO2
BTU/H
ECO
GFI
Page
Page
Parts@bradfordwhite.com Techserv@bradfordwhite.com
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