Service Manual

Page 18
LED Status Control Status Probable Cause Service Procedure
Six flashes,
one flash,
three second
pause (So ft
Lockout)
Failed to light pilot,
system resets after
(5) minutes
1. Uns table pilot
2. Pilot tube block or restrict
ed
3. Oxidation build-up on pilot
electrode
4. Wire damage to pilot
assembly or bad connection at
gas valve
1. See Burner Ins pection
on page 20
2-4. See Pilot Ins pection,
Testing a
nd Replacement
on page 22
Six flashes,
two flashes,
three second
pause (So ft
Lockout)
Pressure switch or
blower temperature
switch opened
during burner
operation. Syst
em
resets after (5)
minutes
1. Vent blockage or impro per
vent configuration
2. Pressure sw itch tub ing kinked
or blocked
3. Faulty pressure switch
4. Vent termination
being
affected by wind
5. Blower not spinning up to
speed
6. Blower temperatu re or
exhaust temperature too high
7. Faulty blower temperatu re
sw
itch
1. Check vent or vent
tables
2-3. See Pressure Switch
Testing on page 25
4. Refer to venting section
of ins tallation manual
5. See Blow er Testing on
page 28
6-7.
See Blow er
Temperature Switch
Testing on page 31
Six flashes,
three
flashes,
three second
pause (So ft
Lockout)
Pilot flame
extinguished,
system auto resets
after (5) m
inutes
1. Uns table 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 control
5. Ins ufficie
nt combustion air
6. Ins ufficient
g
as
p
ressure
1. See Burner Ins pection
on page 20
2-4. See Pilot Ins pection,
Testing and Replacement
on page 22
5. Refer to Installation &
Operation Manual
Six flashes,
four fla
shes,
three second
pause
Undesired false
pilot flame sens ed,
system auto resets
Pilot valve stuck in open pos ition Replace gas control
Seven
flashes,
three second
pause
Flamma
ble vapo r
sens o r or
resettable thermal
switch fault
detected, see
warning label
1. Flammab le vapor present
2. Flammab le vapor senso r
expos ed to excessive mo isture
3. Flammab le vapor senso r
expos ed to extreme ambient
temperature
4. Resettable thermal sw itch
o
p
en
See Flammable Vapo r
Sens o r Testing on page 40
Eight
flashes, one
flash, three
second
pause
Flammable vapo r
sens o r out of
specification,
pos sible short
1. Flammable vapor sens o r out
of
specification; verify Flammable
Vapo r Sens o r (FVS) resistance is
not below 25 k.
2. Possible short in flammable
vapor sens o r or resettable
thermal sw itch wirin
g
See Flammable Vapo r
Sens o r Testing on page 40
Troubleshooting
18