Gas Control Troubleshooting Chart - Bradford White ECO-DEFENDER U130T*FRN Service Manual

Observe red LED indicator on
gas control. Error flash codes are
displayed with a three second
pause before repeating. Check
and repair the system as noted in
the troubleshooting table below.
LED Status
Gas valve is operating
normally. Pilot flame
None (LED not on may not be present.
or flashing) Check for pilot flame
through sight glass and
If set point knob is in
One flash and "PILOT" position then
three second pilot flame is detected.
pause. Turn set point knob to
been recently turned to
LED on the "OFF" position.
continuously. Wait until LED goes out
before attempting to
Two flashes and
detected. System will
three second
reset when pilot flame
pause.
Three flashes and
three second heating. System will
pause.
Four flashes and
three second temperature. System
pause.
Control Status
1. Gas valve is
functioning normally
2. Gas valve is not
powered. Light pilot
light if necessary.
Gas valve is powered
and waiting for the set
point knob to be turned
to a water temperature
desired setting setting.
Set point knob has
Set point knob was
turned to "OFF"
position.
relight
1. Thermopile failure
Weak pilot flame 2. Unstable pilot.
3. Pilot tube block or
restricted.
is sufficient. 4. Resettable thermal
switch has opened.
1. Thermowell sensor
Insufficient water and chamber
temperature sensor out
reset. of calibration.
2. Possible short.
Excessive tank 1. Thermowell sensor
out of calibration.
must be reset. 2. Faulty gas valve.
Page 5
Gas Control Troubleshooting
Probable Cause Service Procedure
If the pilot will not stay lit
replace thermopile, see
page 10. If problem
persists replace gas
valve, see page 16.
Normal operation. Adjust
thermostat to desired
temperature level.
LED will go out and the
control will function
normally when the pilot is
lit.
1. See page 10.
2&3. See page 12.
4. See page 21.
1&2. See pages 14 and
18.
1. See page 14.
2. See page 16.
Red LED
Indicator
5