57
11
NO PREVIOUS CODE – Status codes
are erased after 72 hours or can
be
manually erased
b
y
putting setup
s
w
itch
SW1-1 in the ON position and jumper
ing
R,
W/W1, and
Y/Y2 simultaneously until
status code #11 is flashed.
Run system
through a lo
w-heat,
high-heat, or cooling
cycle to chec
k system.
12
BLO
WER ON AFTER PO
WER UP –
(115V OR 24V) – Nor
mal operation.
Blo
w
er r
uns f
or 90 seconds
, if unit is
po
wered up during a call f
or heat (R
-
W/W1 closed) or when (R-W/W1 opens
)
dur
ing the b
lo
wer on-dela
y per
iod.
13
LIMIT CIRCUIT LOCK
OUT – Loc
k
out
occurs if the limit, draft saf
eguard, fla
me
rollout, or b
loc
k
ed v
ent s
witch* (if used)
is open longer than 3 minutes or 10
successiv
e limit tr
ips occurred dur
ing
high-heat.
Control will auto-reset after
3
hours
. See code 33.
14
IGNITION LOCK
OUT – System
fa
iled to
ignite gas and pro
v
e flame in 4 att
empts
.
Control will auto-reset after 3 hours
.
See status code 34.
1
5
BLO
WER MO
T
OR LOCK
OUT
–
Indicates
the b
lo
wer f
ailed to reach 250 RPM or
the b
lo
wer f
ailed to communicate wi
thin
30 se
conds after being tur
ned ON in two
successiv
e heating cycles
. Control will
auto-reset after 3 hours
. See code 41.
21
GAS HEA
TING LOCK
OUT –
T
u
rn
off
po
wer and w
ait 5 minutes to retr
y.
Chec
k f
o
r:
-
S
tuc
k
closed gas
va
lv
e rela
y on
control.
-
M
is
wire or shor
t to gas v
alv
e wire
.
2
2
ABNORMAL
FLAME-PR
O
V
ING
SIGNAL
Flame is pro
v
ed while gas v
alv
e is de-
energiz
ed.
Inducer will r
un until f
ault is
cleared.
Chec
k f
o
r:
-
S
tuc
k open or leaky gas v
alv
e
.
23
PRESSURE SWITCH DID
NO
T OPEN
Chec
k f
o
r:
-
O
bstr
ucted pressure tube
.
-
P
ressure s
witch stuc
k closed.
2
4
SECOND
AR
Y V
O
LT
A
G
E FUSE IS OPEN
Chec
k f
o
r:
-
S
hor
t circuit in secondar
y v
oltage
(24V) wir
ing including ther
mostat
leads
. Disconn
ect ther
mostat leads
to isolate shor
t circuit.
32
LO
W
-HEA
T PRESSURE SWITCH DI
D
NO
T CLOSE OR REOPENED – If open
longer than 5 minutes
, inducer shuts off
for 15 minutes bef
ore retr
y.
If opens
dur
ing b
lo
w
er on-del
a
y
per
iod, b
lo
wer
will
come on f
o
r the selected b
lo
w
er off-dela
y.
Chec
k f
o
r:
-
P
roper v
ent sizing.
-
L
o
w
inducer v
oltage (115V).
-
L
o
w
inlet gas pressure (if LGPS
used).
-
Inadequate comb
ustion air supply
.
-
D
isconnected or obstr
ucted pressure
tubing.
-
Def
ectiv
e inducer motor
.
-
D
ef
ectiv
e pressure s
witch.
-
E
xcessiv
e wind.
-
R
estr
icted v
ent.
33
LIMIT CIRCUIT F
AU
LT
– Indicates the
limit, draft saf
eguard, flame rollout, or
bl
o
c
k
ed v
ent s
witch* (if used) is open or
the
fur
nace is operating in h
igh-heat onl
y
mode due to
2 successi
v
e
lo
w-heat limit
tr
ips
. Blo
wer will run f
or 4 min.
or until
open
sw
itch remak
es whiche
ver is longer
.
If open
longer than 3 min.,
code
change
s
to loc
k
out #13.
If open less than 3 min.
status code #33 continues to flash
until
bl
ow
er shuts
off
. F
lame rollout
s
w
itch and
BVSS requires ma
nual reset.
Chec
k f
o
r:
-D
ir
ty filter or restr
icted duct system.
-
Loose b
lo
wer wheel.
-
D
ef
ectiv
e s
witch or connections
.
-
Inadequate comb
ustion air supply
(flame rollout s
witch open).
-
R
estr
icted v
ent.
-
Proper v
ent sizing.
-
E
xcessiv
e wind.
34
IGNITION PR
O
V
ING
F
A
ILURE – If flame
is not sensed dur
ing the tr
ial f
or ignition
per
iod,
the control will rep
eat the ignitio
n
sequence 3 more times bef
ore lo
c
k
out
#14 occurs
. If flame signal is lost
dur
ing
the b
lo
wer on-dela
y per
iod, b
lo
wer will
come on f
or the selected b
lo
w
er off
-dela
y.
Chec
k the f
ollo
wing items first bef
ore
proceeding to the ne
xt step
.
-
G
as v
alv
e tur
ned off
.
-
M
anual shut-off v
alv
e
.
-
G
reen/Y
ello
w wire MUST be connecte
d
to fur
nace sheet metal.
-
Flame sensor must not be
grounded.
T
o
deter
mine whether the prob
lem is in
the gas v
a
lv
e
, igniter
, or flame sensor the
system can be operated in compone
nt
test mode
.
T
o
chec
k the igniter rem
ov
e
the R ther
mostat connection from the
control, reset po
w
er
, and put setup s
witc
h
SW1-6 in the ON
position to star
t the
component test.
Does the ignite
r glo
w
orange/white
b
y
the end of the 15
second
wa
rm
-up per
iod?
4
3
LO
W
-HEA
T
PRESSURE SWITCH OPEN
WHILE HIGH-HEA
T PRESSURE
SWITCH IS CLOSED - Chec
k f
o
r:
-
L
o
w
-heat pressure
s
w
itch stuc
k
open.
-
D
isconnected or obstr
ucted pressure
tube
.
-
M
is
wired pressure s
witches
.
-L
o
w
inlet gas pressure (if LGPS used).
Unplug igniter har
ness from control and
repe
at component
test b
y
tur
ning setup
sw
itch
SW1-6 OFF and then bac
k ON.
Chec
k f
o
r
115V between pin 3 and NEUTRAL-L2 on
the control.
W
as 115V present f
or the 15
second per
iod?
Reconnect the R ther
mostat lead and set
ther
mostat
to call f
o
r heat.
Connect v
o
ltmeter
across gas v
alv
e connections
. Does gas
v
alv
e receiv
e 24V?
Does gas
v
a
lv
e open and allo
w gas to flo
w?
Do the main b
u
rners ignite?
Do the main b
u
rners sta
y on?
Repeat call f
or heat and chec
k
fla
me sensor
current dur
ing tr
ial f
o
r ignition per
iod.
Is the
DC microamps bel
o
w
0.5?
Clean flame se
nsor with fine steel wool and
rechec
k current.
Nominal current is
4.0 to
6.0 microamps
.
Is current near typical v
alue?
Will main b
u
rners ignite and sta
y on?
Fix
ed.
45
CONTR
O
L CIRCUITR
Y LOCK
OUT
A
uto-reset after 1 hour lo
c
k
out due to:
-
Flame circuit f
ailure
.
-
G
as v
alv
e rela
y stuc
k open.
-
S
oftw
are chec
k error
.
Reset po
wer to clear lo
c
k
out.
Replace control if code repeats
.
Replace fur
nace control.
Chec
k f
or continuity in the har
ness and
igniter
. Replace def
ectiv
e component.
YES
NO
YES
YES
YES
NO
YES
Chec
k connections
. If OK, replace control.
Chec
k that all gas v
alv
es are tur
ned on.
Replace v
a
lv
e
.
Chec
k f
o
r:
-
Inadequate flame carr
y
o
v
er or rough
ignition.
-L
o
w
inlet gas pressure
.
-P
roper fir
ing rate
.
-B
loc
k
ed or incorrect carr
y- o
v
er gap
.
(.045”
nominal
)
Allo
w
b
lo
w
er to come on and repeat t
est
to chec
k f
or inter
mittent operation.
Chec
k connections and retr
y.
If current is
near typical v
alue (4.0-6.0 nominal) an
d
b
u
rn
ers will not sta
y on, repeat chec
k
in high-
heat.
If b
u
rners will still not sta
y on replace
control.
If b
u
rners operate in high-heat t
hen
s
w
itch to lo
w-heat,chec
k manif
old pressure
.
If OK, chec
k b
u
rner carr
y
o
v
er and flame
sensor location.
Replace electrode
.
Replace fur
nace control
.
NO
NO
NO
YES
NO
NO
NO
NO
YES
* Bloc
k
ed v
ent s
witch used in Chimne
y
Adapter Kit
YES
YES
A02108B
PG
8M
VA
