Bradford White D-4-504S6FSX - Manual (Page 13)

Page 13
LED Status Control Status Probable Cause Service Procedure
None (LED
not on or
flashing)
Electrical power not
present
Control power switch in "OFF"
position.
Supply voltage interrupted.
Turn Power On
One short
flash every
four seconds
Stand-by mode,
Thermostat is
satisfied (no faults)
Temperature demand is satisfied
(no call for heat)
Normal operation
Alternates
bright and
dim
(heartbeat)
Thermostat calling
for heat (no fault)
Tank temperature below
setpoint of thermostat
Normal operation
Short flash
once every
second
Weak pilot signal
on last call for heat
1. Unstable pilot
2. Pilot tube blocked or restricted
3. Oxidation build-up on pilot
electrode
4. Wire damage to pilot
assembly or bad connection at
gas control
1. See Burner Inspection on
page 15
2-4. See Pilot Inspection,
Testing and Replacement on
page 17
Two flashes,
three second
pause
Damper test circuit
not working
1. Damper not in proper position
or malfunctioning - stuck in open
position
2. Obstructed venting
3. Faulty damper
1. Verify cord sets are fully
plugged in
2. Verify switch on damper is
in "Automatic" position
3. Verify that damper and
venting is not obstructed
Three
flashes,
three second
pause
Damper test circuit
not working
1. Damper not in proper position
or malfunctioning - not reaching
full open position
2. Obstructed venting
3. Faulty damper
1. Verify cord sets are fully
plugged in
2. Verify switch on damper is
in "Automatic" position
3. Verify that damper and
venting is not obstructed
Four flashes,
three second
pause
Excessive tank
temperature,
system must be
reset
1. Thermal well sensor out of
calibration
2. Faulty gas control
1. Test Gas Control & Thermal
Well
2. Replace gas control if
necessary
Five flashes,
three second
pause
False pilot flame
present
Pilot valve stuck in open position Replace gas control
Six flashes,
one flash,
three second
pause (Soft
Lockout)
Failed to light pilot,
system resets after
(5) minutes
1. Unstable pilot
2. Pilot tube block or restricted
3. Oxidation build-up on pilot
electrode
4. Wire damage to pilot
assembly or bad connection at
gas valve
1. See Burner Inspection on
page 15
2-4. See Pilot Inspection,
Testing and Replacement on
page 17
Observe the green LED on the water heater gas
control. Error codes are displayed with a 3 second
pause before repeating. Once the error code is known,
check and repair the water heater, as recommended in
the table below.
Troubleshooting
Green LED
13