Bradford White D-4-504S6FSX - Manual (Page 29)

29
Troubleshooting continued-
LED Status Control Status Probable Cause
Six flashes, tw o
flashes, three
second pause
(Soft Lockout)
Damper test circuit not
w orking properly during
burner operation, system
auto resets after (5)
minutes
1. Damper not in proper position or
malfunctioning - damper moved from full
open position during run cycle
2. Obstructed venting
3. Faulty damper
4. Damper jostled during run cycle
Six flashes, three
flashes, three
second pause
(Soft Lockout)
Pilot flame extinguished,
system auto 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
5. Insufficient combustion air
Six flashes, four
flashes, three
second pause
Undesired false pilot flame
sensed, system auto
resets
Pilot valve stuck in open position
Seven flashes,
three second
pause
Flammable vapor sensor or
resettable thermal sw itch
fault detected, see
w arning label
1. Flammable vapor present
2. Flammable vapor sensor exposed to
excessive moisture
3. Flammable vapor sensor exposed to
extreme ambient temperature
4. Resettable thermal sw itch open
Eight flashes, one
flash, three
second pause
Flammable vapor sensor
out of specification,
possible short
1. Flammable vapor sensor out of
specification
2. Possible short in flammable vapor sensor
or resettable thermal sw itch w iring
Eight flashes,
three flashes,
three second
pause
Thermal w ell sensor
damaged or unplugged or
gas valve electronics fault
detected
1. Damage to thermal w ell w ires
2. Thermal w ell sensor resistance out of
range
3. Replace thermal w ell
4. Verify control is not w et or physically
damaged
5. Reset control on/off sw itch
6. Replace electronic module if 8-3 error
persists
Eight flashes, four
flashes, three
second pause Gas valve fault detected
1. Verify control is not w et or physically
damaged
2. Reset control on/off sw itch
3. Replace gas control if 8-4 error persists
Fault Probable Cause
Resettable Thermal Switch Tripped (Open) 1. Insufficient combustion air
2. Flammable vapor present