Bradford-white D-4-504S6FSX User Manual download pdf (Page 29)

29

Troubleshooting continued-

LED St at u

s

Control Statu

s

Probable Cause

Six flashes, two

flashes, t hree

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 f lashes, t hree

flashes, t hree

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, t hree

second

p

ause

Undesired false pilot flame

sensed, syst em auto

resets

Pilot valve stuck in open position

Seven flashes,

three second

pause

Flammable vapor sensor or

resettable thermal switch

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 temperat ure

4. Resettable thermal switch open

Eight flashes, one

flash, t hree

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 f lashes,

three second

pause

Thermal well sensor

damaged or unplugged or

gas valve electronics fault

detected

1. Damage to thermal well w ires

2. Thermal w ell sensor resistance out of

range

3. Replace t hermal w ell

4. Verify control is not w et or physically

damaged

5. Reset control on/off switch

6. Replace electronic module if 8-3 error

persists

Eight flashes, four

flashes, t hree

second pause

Gas valve fault detected

1. Verify control is not w et or physically

damaged

2. Reset control on/off switch

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

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