Bradford White HE-4-50S6FSX - Manual (Page 14)

Page 14
LED Status Control Status Probable Cause Service Procedure
Six flashes, two
flashes, three
second pause
(Soft Lockout)
Pressure switch or
blow er temp switch
opened during
burner operation,
system auto resets
after (5) minutes
1. Vent blockage or improper vent
configuration
2. Pressure sw itch tubing kinked or
blocked
3. Faulty pressure sw itch
4. Blower not spinning up to speed
5. Damper (inside blower) not fully
opening
6. Faulty blower temperature switch
1. See Burner Inspection on
page 15
2-4. See Pressure Sw itch Testing
and Replacement on page 35
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. W ire damage to pilot assembly or
bad connection at gas control
5. Insufficient combustion air
6. Insufficient gas pressure
1. See Burner Inspection on
page 15
2-4. See Pilot Inspection, Testing
and Replacement on page 17
5. Refer to Installation &
Operation Manual
Six flashes, four
flashes, three
second pause
Undesired false
pilot flame sensed,
system auto resets
Pilot valve stuck in open position Replace gas control
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 temperature
4. Resettable thermal sw itch open
See Flammable Vapor Sensor
Testing on page 27
Eight flashes,
one flash, three
second pause
Flammable vapor
sensor out of
specification,
possible short
1. Flammable vapor sensor out of
specification; verify Flammable Vapor
Sensor (FVS) resistance is not below
25,000 Ohms.
2. Possible short in flammable vapor
sensor or resettable thermal sw itch
wiring
See Flammable Vapor Sensor
Testing on page 27
Eight flashes,
tw o flashes,
three second
pause
Temperature
sensor fault
detected
1. Damage to temperature sensor
wires
2. Temperature sensor resistance
out of range
3. Replace temperature sensor
See Temperature Sensor Testing
on page 21
Eight flashes,
three flashes,
three second
pause
Gas control
electronics fault
detected
1. Verify control is not wet or
physically damaged
2. Reset control on/off switch
3. Replace gas control if 8-3 error
persists
See Gas Control Removal on
page 25
Eight flashes,
four flashes,
three second
pause
Gas control fault
detected
1. Verify control is not wet or
physically damaged
2. Reset control on/off switch
3. Replace gas control if 8-4 error
persists
1. Replace gas control if wet or
physically damaged
2. Cycle power
3. Replace gas control
Troubleshooting
14