Bradford White D Series Service Manual page 8

Use Caution Not to Damage Connectors when making Voltage Measurements or Jumping Terminals
From previous page
Does damper blade move to the full
open position?
Y
Is there pilot flame?
Y
Does Main Burner operate?
Y
Does burner continue until
thermostat set point is reached?
See setting display in Service Mode
and displaying temperature
sensors.
Y
Does the flue damper rotate to the
fully closed position?
Y
System okay
8
CAUTION
Error code #55 on display.
Remove damper from heater and
N
jump black & yellow wires of
heater harness. Refer to photo on
this page.
N
Error code #62 on display. See
"Pilot Will Not Light".
N
Error code #62 on display. See
"Pilot Lights, No Flame Signal"
N
Error code #63 on display. See
"Main Burner Short Cycles".
Error code #56 on display.
N
Check for debris limiting damper
rotation. If no debris, replace
damper
Status Service Needed
SELECT Lockout RESET
Example of error code shown on control display.
Page 8
Troubleshooting
Does water heater begin to
operate?
Check for debris limiting damper
rotation. If no debris, replace
damper.
Damper vane show in open position. If damper
is closed, disconnect from harness and
REMOVE damper from water heater.
Harness shown disconnected from
damper with BLACK and YELLOW
wires jumped.
Error Code Shown
in Water Heater Display
Y
6