AERCO BMK 2.0 LN Dual Fuel Nov 2010 - Manual (Page 75)

TROUBLESHOOTING 8.
2
A
DDI
T
IO
N
A
L
FA
ULT
S
W
IT
H
O
U
T
SPECI
F
IC
FA
ULT
M
ESSA
G
E
S
Ref
er
to T
able 8-
2 to tr
oubles
hoot f
aults
w
hic
h m
ay
oc
c
ur
w
ithout a s
pec
if
ic
f
ault m
es
s
age being dis
play
ed.
TA
B
L
E 8-
2. B
OILER
TR
OU
B
L
ESH
OOTIN
G WITH
N
O FA
U
LT M
ESSA
GE D
ISPLA
Y
ED
O
BSERVED I
NCI
DENT
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
Har
d
Light-
O
ff
1.
Staged Ignition Ball Valve is
c
los
ed
for
the f
uel s
our
c
e being us
ed.
2.
Both Staged Ignition Ball Valves
ar
e
open.
3.
Clogged/dam
aged G
as
Inj
ec
tor
(F
igur
e 8-
2)
.
4.
Def
e
c
tive Staged Ignition Solenoid
(F
igur
e 8-
2)
1.
Ref
er
to Appendix
K and ens
ur
e that the 1/4”
Ball Valve
dow
ns
tr
eam
of
the SSO
V f
or
the f
uel s
our
c
e being us
ed (
natur
al
gas
or
pr
opane)
is
open. Als
o, ens
ur
e that the 1/4”
Ball Valve
dow
ns
tr
eam
of
the SSO
V f
or
the f
uel s
our
c
e
not
being us
ed is
c
los
ed. (
S
ee F
igur
es
8-
1, K-
2 or
K-
3)
.
2.
Ref
e
r to Appendix
K and c
los
e the Staged Ignition Ball Valve f
o
r
the f
uel s
our
c
e that
is
not
being us
ed.
3.
Rem
ove and ins
pec
t G
as
Inj
ec
tor
to ens
ur
e it is
not c
logged or
dam
aged.
4.
Clos
e the 2”
and the 1/4”
Ball Valves
dow
ns
tr
eam
of
the SSO
V
(F
ig. 8-
1)
. Star
t the unit and lis
ten f
or
a “
c
lic
k
ing”
s
ound that the
Staged Ignition Solenoid m
a
k
e
s
dur
ing Ignition T
rial. If
“
c
lic
k
ing”
s
ound is
not hear
d af
ter
2 or
3 attem
pts
, r
eplac
e the Staged
Ignition Solenoid.
F
luc
tuating G
as
Pr
es
s
ur
e
1.
G
as
pr
es
s
ur
e going into unit is
fl
uc
tuating.
2.
Dam
p
ing O
rif
ic
e not ins
talled.
1.
Stabiliz
e gas
pr
es
s
ur
e going into unit. If
nec
es
s
ar
y
, tr
oubles
hoot
Building Supply
Regulator
.
2.
Chec
k
to ens
ur
e that the Dam
ping O
rif
ic
e is
ins
talled in the
SSO
V Ac
tuator
s
how
n in F
igur
e 8-
3. (
F
or
IRI G
as
T
rains
, the
Dam
p
ing O
rif
ic
e is
ins
talled in the dow
ns
tr
eam
SSO
V Ac
tuator
).
Air
/F
uel Valve “
hunting”
at 80%
Valve Pos
ition
1.
IG
ST
and Pow
er
Supply
Boar
ds
in
Contr
ol Box
ar
e outdated.
1.
Chec
k
to ens
ur
e that the IG
ST
and Pow
er
Supply
Boar
ds
ar
e
Rev. E or
higher
.
8-
11