AERCO BMK 2.0 LN Dual Fuel Nov 2010 - Manual (Page 66)

TROUBLESHOOTING
TA
BLE 8-
1. BOIL
ER TROUBLESHOOTING
F
A
U
L
T
IN
D
IC
A
T
ION
P
R
OB
A
B
L
E
C
A
U
S
E
S
T
R
OU
B
L
E
S
H
OOT
IN
G/C
OR
R
E
C
T
IV
E
A
C
T
ION
AIRFLOW
FAULT
DURING IGNIT
ION
1.
Blow
er
s
topped r
unning due to ther
m
al
or
c
ur
rent over
load
2.
Bloc
k
ed Blow
er
inlet or
inlet duc
tw
or
k
3.
Bloc
k
ed Blow
er
pr
oof
s
w
itc
h
4.
Def
ec
tive Blow
er
pr
oof
s
w
itc
h
5.
Bloc
k
age in bloc
k
ed-
air
inlet s
w
itc
h
6.
Def
e
c
tive bloc
k
ed air
inlet s
w
itc
h
7.
Loos
e tem
per
atur
e s
ens
or
to AUX
c
onnec
tion in I/O
Box
8.
Def
ec
tive tem
per
atur
e s
ens
or
9.
Loos
e w
ir
e c
onnec
tion betw
een the
0-
10V s
ignal f
rom
I/O
box
to the
Blow
er
Motor
input
10.
Def
ec
tive I/O
box
11.
W
rong 0-
10V output s
elec
tion on the
c
ontr
o
l box
12.
Def
e
c
tive Air
-F
uel Valve
potentiom
eter
1.
Chec
k
c
om
bus
tion blow
er
f
or
s
igns
of
ex
c
es
s
ive heat or
high
c
ur
rent dr
ain that m
ay
tr
ip ther
m
al or
c
ur
rent over
load devic
es
.
2.
Ins
pec
t the inlet to the c
om
bus
tion blow
er
inc
luding any
duc
tw
or
k
leading up to the c
om
bus
tion blow
er
f
or
s
igns
of
bloc
k
age.
3.
Rem
ove the Blow
er
pr
oof
s
w
itc
h and ins
pec
t f
or
s
igns
of
bloc
k
age, c
lean or
r
eplac
e as
nec
es
s
ar
y
.
4.
Meas
ur
e the Blow
er
pr
oof
s
w
itc
h f
or
c
ontinuity
w
ith the
c
om
bus
tion blow
er
r
unning. If
ther
e is
an er
ratic
r
es
is
tanc
e
reading or
the r
es
is
tanc
e r
eading is
gr
eater
than z
er
o ohm
s
,
replac
e the s
w
itc
h.
5.
Rem
ove the bloc
k
ed air
inlet s
w
itc
h and ins
pec
t f
or
s
igns
of
bloc
k
age, c
lean or
r
eplac
e as
nec
es
s
ar
y
.
6.
Meas
ur
e the bloc
k
ed-
air
inlet s
w
itc
h f
or
c
ontinuity
w
ith the
c
om
bus
tion blow
er
r
unning. If
ther
e is
an er
ratic
r
es
is
tanc
e
reading or
the r
es
is
tanc
e r
eading is
gr
eater
than z
er
o ohm
s
,
replac
e the s
w
itc
h.
7.
Chec
k
the ac
tual inlet air
tem
per
atur
e and m
eas
ur
e voltage at
AUX
input in the I/O
Box
. Ver
if
y
that the voltage c
onf
or
m
s
to the
values
s
how
n in the tabular
lis
ting pr
ovided in Appendix
C.
8.
Ref
er
to CO
RRECT
IVE ACT
IO
N
7 and ver
if
y
that the voltage
c
onf
or
m
s
to the values
s
how
n in Appendix
C.
9.
Chec
k
w
ir
e c
onnec
tion f
rom
I/O
Box
0-
10V s
ignal to the Blow
er
Motor
.
10.
Meas
ur
e voltage at the I/O
box
0-
10V output. A voltage of
9.1V
equates
to a 100% open Air
/F
uel Valve pos
ition.
11.
Chec
k
the
Analog O
u
t option on the C-
Mor
e Conf
igur
ation
Menu.
Valv
e Pos
ition
0-
10V
s
hould be s
elec
ted.
12.
Chec
k
Air
/F
uel Valve pos
it
ion at 0%, 50% and 100% valve
pos
itions
, the pos
ition on the C-
Mor
e bar
ogr
aph s
hould m
atc
h
the valve pos
ition.
8
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2