AERCO BMK 2.0 LN Dual Fuel Nov 2010 - Manual (Page 69)

TROUBLESHOOTING
8
-
5
TA
BLE 8-
1. BOILER TR
OUBLESHOOTING – Cont
inued
FA
ULT
I
NDI
CA
T
IO
N
PRO
B
A
B
LE CA
USES
T
R
OU
B
L
E
S
H
OOT
IN
G/C
OR
R
E
C
T
IV
E
A
C
T
ION
(c
ontinued)
8
.
Def
ec
tiv
e s
taged ignition s
o
lenoid
valve.
9.
Clogged s
taged ignition piec
e.
10.
Car
bon or
other
debr
is
on bur
ner
8.
W
hen boiler
goes
to ignition, lis
ten to s
o
lenoid valve to
ens
ur
e
it
is
opening.
9.
Rem
ove and ins
pec
t s
taged ignition piec
e f
or
bloc
k
age.
Rem
ove the bur
ner
and ins
pec
t f
or
any
c
ar
bon
or
debr
is
.
Clean
and r
e
ins
tall
F
L
AME LO
SS
DURING RUN
1.
W
or
n F
lam
e Detec
tor
or
c
rac
k
ed
ce
ra
m
ic.
2.
Poor
c
om
bus
tion c
alibr
ation.
3.
Debr
is
on bur
ner
.
4.
Bloc
k
ed c
ondens
ate dr
ain.
1.
Rem
ove and ins
pec
t the F
lam
e Detec
tor
f
or
s
igns
of
w
ear
or
c
rac
k
ed c
er
am
ic
. Replac
e if
nec
es
s
ar
y
.
2.
Chec
k
c
om
bus
tion c
alibr
ation. Adj
us
t as
nec
es
s
ar
y
.
3.
Rem
ove the bur
ner
and ins
pec
t f
or
any
c
ar
bon or
debr
is
. Clean
and r
e
ins
tall.
4.
Rem
ove bloc
k
age in c
ondens
ate dr
ain.
HEAT
DEMAND
FAILURE
1.
T
he Heat Dem
and Relay
s
on the
Ignition/Stepper
boar
d f
ailed to
ac
tivate w
hen c
om
m
anded
2.
Relay
is
ac
tivated w
hen not in
Dem
and
1.
Pr
es
s
CLEAR button and r
es
tar
t the unit. If
the f
ault
per
s
is
ts
,
replac
e Ignition/Stepper
(
IG
S
T
) Boar
d.
2.
Def
ec
tive r
elay
. Replac
e IG
ST
Boar
d.
HI
GH GA
S
PRESSURE
1.
Inc
or
rec
t s
upply
gas
pr
es
s
ur
e.
2.
Def
ec
tive gas
pr
es
s
ur
e adj
us
tm
ent
in SSO
V Ac
tuator
.
1.
Chec
k
to ens
ur
e gas
pr
es
s
ur
e at inlet of
SSO
V is
2 ps
ig
ma
x
imu
m.
2.
If
gas
s
upply
pr
es
s
ur
e dow
ns
tr
eam
of
SSO
V c
annot be low
er
ed,
to 7.2”
W
.C. (
for
natur
al gas
) or
2.7" W
.C.(
for
pr
opane)
, the
SSO
V Ac
tuator
gas
pr
es
s
ur
e adj
us
tm
ent m
ec
hanis
m
m
ay
be
def
ec
tive. [s
ee par
a. 4.3, s
tep 11 (
natur
al gas
),
or
4.4, s
tep 12
(pr
opane)
],