Bryant 312AAV/JAV - Manual (Page 54)

54
11
NO PREVIOUS CODE
– Stored codes
are erased
after 72 hours
. On RED LED
boards stored status codes can also be erased whene
v
e
r po
wer (115V or 24V
)
is interr
upted.
Run system through a
lo
w-heat, high-heat, or cooling cycle to
chec
k system.
12
BLO
W
ER ON AFTER PO
WER UP
–
(115V OR 24V)
–
Nor
mal operation.
Blo
w
er r
uns f
o
r the selected b
lo
w
er off-
dela
y, if unit is po
wered up during a call
fo
r heat (R-W/W1 closed) or when (R
-
W/W1 opens) dur
ing the b
lo
w
er on-dela
y
per
iod.
13
LIMIT CIRCUIT LOCK
OUT
–
Loc
k
out
occurs if the limit, draft saf
eguard, flame
rollout, or b
loc
k
e
d v
ent s
witch* (if used)
is open longer than
3 minutes
. C
o
n
tr
o
l w
ill
auto-reset after 3 hours
. See code 33.
14
IGNITION LOCK
OUT
–
System f
ailed to
ignite gas and pro
v
e flame in 4 attempts
.
Control will auto-reset after 3 hours.
S
e
e
status code 34.
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 v
a
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
e
d while gas v
alv
e is de-
energiz
ed.
Inducer will r
u
n until f
a
ult 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.
24
SECOND
A
R
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
. Disconnect ther
mostat leads
to isolate shor
t circuit.
31
HIGH-HEA
T PRESSURE SWITCH OR
RELA
Y DID NO
T CLOSE OR
REOPENED - Chec
k f
o
r:
-C
ontrol rela
y ma
y be def
ectiv
e
.
-
G
as v
a
lv
e is mis
wired.
-
S
ee status code 32.
32
LO
W
-HEA
T
PRESSURE SWITCH DID
NO
T CLOSE OR REOPENED
– If open
longer than 5 min
u
tes
, inducer shuts off
fo
r 15 minutes bef
o
re retr
y.
If opens
dur
ing b
lo
w
er on-dela
y
per
iod, b
lo
w
er
will come on f
or the selected
b
lo
w
er off-
dela
y.
Chec
k
f
o
r:
-
P
roper v
ent sizing.
-
L
o
w
inducer v
o
ltage (115V).
-
L
o
w
inlet gas pressure (if LGPS used).
-
Inadequate comb
ustion air supply
.
-
D
isconnected or obstr
ucted pressure
tubing.
-
D
ef
ectiv
e
inducer motor
.
-
D
ef
ectiv
e
pressure s
witch.
-
E
xcessiv
e
wind.
-
R
estr
icted v
ent.
33
LIMIT CIRCUIT F
A
UL
T
–
Indicates the
limit, draft saf
eguard, flame rollout, or
b
loc
k
e
d v
e
nt shutoff s
witch* (if used) is
open.
Bl
o
w
er will r
u
n f
or 4 minutes
or until
open s
witch remak
e
s whiche
ve
r is longer
.
If open longer than 3 minutes
, code
changes to loc
k
out #13.
If open less
than 3 min.
status code #33 continues
to flash until b
lo
w
er shuts off
. Flame
rollout s
w
itch and BVSS
requires manual
reset.
Chec
k f
or
:
-
D
ir
ty filter or restr
icted duct system.
-
L
oose b
lo
w
er wheel.
-
D
ef
ectiv
e
s
witch or connections
.
-
D
ef
ectiv
e
b
lo
w
er motor or capacitor
.
-
Inadequate comb
ustion air supply
(flame rollout s
witch open).
-R
estr
icted v
ent.
-
P
roper v
ent sizing.
-
E
xcessiv
e
wind.
3
4
IGNITION PR
O
V
ING F
A
ILURE
– If flame
is not sensed dur
ing the tr
ial f
o
r ignition
per
iod, the control will repeat the ignition
sequence 3 more times bef
o
re loc
k
out
#14 occurs
. If flame signal is lost dur
ing
the b
lo
w
er on-dela
y
per
iod, b
lo
w
er will
come on f
o
r the selected b
lo
w
er off-dela
y.
Chec
k
the f
ollo
wing items first bef
o
re
proceeding to the ne
xt step
.
-G
as v
alv
e tur
n
ed off
.
-
M
anual shut-off v
a
lv
e
.
-
G
reen/Y
ello
w
wire
MUST be connected
to fur
n
ace sheet metal.
-
F
lame 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 the component test mode to chec
k the igniter
.
First remo
ve
the R ther
mostat connection
from the control and initiate the component test sequence
. Does the
igniter glo
w
orange/white b
y
the end of
the 15 second w
a
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
sw
itch stuc
k open.
-
D
isconnected or obstr
ucted pressure
tube
.
-
M
is
wired pressure s
w
itches
.
-
L
o
w
inlet gas pressure (if LGPS used).
Unplug igniter har
n
ess from control and
initiate another component test sequence
.
Chec
k f
or 115V between pin 1 and
NEUTRAL-L2 on the control.
W
a
s 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
a
lv
e connections
. Does gas
v
a
lv
e receiv
e 24V?
Does
gas
v
a
lv
e
open and all
o
w
gas to fl
o
w
?
Do the main b
u
rners ignite?
Do the main b
u
rn
ers sta
y
on?
Repeat
call f
o
r heat and chec
k flame sensor
current dur
ing tr
ial f
o
r ignition per
iod.
Is the
DC microamps belo
w
0.5?
Clean flame sensor with fine steel wool and rechec
k current.
Nominal current is 4.0 to
6.0 microamps
.
Fix
e
d.
4
5
CONTR
O
L CIRCUITR
Y LOCK
OUT A
u
to-
reset after 1 hour loc
k
out due to:
-
F
lame circuit f
a
ilure
.
-
G
as v
a
lv
e rela
y stuc
k open.
-
Softw
are chec
k error
.
Reset po
wer to clear lo
c
k
out.
Replace
control if code repeats
.
Replace fur
n
ace control.
Chec
k f
o
r continuity in the har
ness and igniter
.
Replace def
e
ctiv
e component.
Chec
k connections
. If OK, replace control.
Chec
k that all gas v
a
lv
es are tur
n
ed on.
Replace v
a
lv
e
.
Chec
k f
o
r:
-
Inadequate flame carr
y
o
v
e
r 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)
All
ow
b
lo
w
er to come on and repeat test to
chec
k f
o
r inter
m
ittent operation.
Chec
k connections and retr
y.
If current is
near typical v
a
lue (4.0-6.0 nominal) and
b
u
rn
ers will not sta
y
on, repeat chec
k in high-
heat.
If b
u
rn
ers will still not sta
y
on replace
control.
If
b
u
rn
ers operate in high-heat the
n
sw
itch to l
o
w-heat, chec
k manif
old pressure
.
If OK, chec
k b
u
rn
er carr
y
o
v
er and flame
sensor location.
NO YES
YES YES YES NO YES YES YES
* Bloc
k
e
d v
e
nt shutoff s
witch used in Chimne
y Adapter Kit
NO YES NO NO NO YES NO NO
Replace electrode
.
Is current near typical v
a
lue?
NO
Replace fur
n
ace control.
Will main b
u
rn
ers ignite and sta
y
on?
A05001
312AA
V