Bradford-white D-4-504S6FSX User Manual download pdf (Page 28)

28

TROUBLESHOOTING

LED St at u

s

Control Statu

s

Probable Cause

None (LED not on

or flashin

g)

Elect rical pow er not

p

resent

Control power sw itch in " OFF" position.

Su

pp

l

y

volta

g

e interru

p

ted.

One short flash

every f our

seconds

Stand-by mode,

Thermost at is satisf ied (no

faults

)

Temperature demand is satisfied (no call for

heat )

Alternates bright

and dim

(

heart beat

)

Thermost at calling f or heat

(no fault)

Tank temperature below setpoint of

thermost at

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 valve

Tw o 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. Fault

y

damper

Three f lashes,

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

Four flashes,

three second

p

ause

Excessive tank

temperature, system must

be reset

1. Thermal w ell sensor out of calibration

2. Faulty gas valve

Five f lashes,

three second

p

ause

False pilot flame present Pilot valve stuck in open position

Six flashes, one

flash, t hree

second pause

(Soft Lockout)

Failed to light pilot,

syst em 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

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