AERCO BMK 2.0 LN Dual Fuel Nov 2010 - Manual (Page 68)

TROUBLESHOOTING
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
DELAY
E
D
INT
E
RLO
C
K O
PEN
1.
Delay
ed Inter
loc
k
J
um
per
not
ins
talled or
r
e
m
o
ved.
2.
Devic
e pr
oving s
w
itc
h hook
ed to
inter
loc
k
s
is
not c
los
ed
1.
Chec
k
f
or
a j
um
per
pr
oper
ly
ins
talled ac
ros
s
the delay
ed
interloc
k
term
inals
in the I/O
box
.
2.
If
ther
e ar
e 2 ex
ter
nal w
ir
es
on thes
e ter
m
inals
, c
hec
k
to s
ee if
an end s
w
itc
h f
or
a devic
e s
uc
h as
a pum
p, louver
, etc
. is
tied
thes
e inter
loc
k
s
. Ens
ur
e that the devic
e and or
its
end s
w
itc
h
ar
e f
unc
tional. (
jum
per
m
ay
be tem
por
ar
ily
ins
talled to tes
t
inter
loc
k
)
DIRECT
DRIVE
SIG
N
AL F
A
ULT
1.
Dir
ec
t dr
ive s
ignal is
not pr
es
ent:
Not y
et ins
talled.
W
rong polar
ity
.
Signal def
ec
tive at s
our
c
e.
Br
ok
en or
loos
e w
ir
ing.
2.
Signal is
not is
olated (
floating)
.
3.
Contr
ol Box
s
ignal ty
pe s
elec
tion
s
w
itc
hes
not s
et f
or
c
or
rec
t s
ignal
ty
pe (
v
oltage or
c
ur
rent)
.
1.
Chec
k
I/O
Box
to ens
ur
e s
ignal is
hook
ed up.
Hook
up if
not ins
talled.
If
ins
talled, c
hec
k
polar
ity
.
Meas
ur
e s
ignal level.
Chec
k
c
ontinuity
of
w
ir
ing betw
een s
our
c
e and boiler
.
2.
Chec
k
s
ignal at s
our
c
e to ens
ur
e it is
is
olated.
3.
Chec
k
DIP s
w
itc
h on PMC boar
d to ens
ur
e it is
s
et c
or
rec
tly
f
or
the ty
pe of
s
ignal being s
ent. Chec
k
c
ontr
ol s
ignal ty
pe s
et in
Conf
igur
ation Menu.
F
L
AME LO
SS
DURING IGN
1.
Bur
ner
G
round Sc
rew
not ins
talled
or
loos
e.
2.
W
or
n f
lam
e detec
tor
3.
No s
par
k
f
rom
Spar
k
Plug
4.
Def
ec
tive Ignition T
rans
for
m
er
5.
Def
ec
tive Ignition/Stepper
(
IG
S
T
)
Boar
d
6.
Def
e
c
tive
SSO
V
7.
Clos
ed m
anual valve in s
taged
ignition line.
1.
Ins
pec
t and ins
tall/r
etighten Bur
ner
G
round Sc
rew
.
2.
Rem
ove and ins
pec
t the f
lam
e detec
tor
f
or
s
igns
of
w
ear
.
Replac
e if
nec
es
s
ar
y
.
3.
Clos
e the inter
nal gas
valve in the boiler
. Ins
tall and ar
c
a s
par
k
ignitor
outs
ide the unit.
4.
If
ther
e is
no s
par
k
, c
hec
k
f
or
120VAC at the pr
im
ar
y
s
ide to the
ignition tr
ans
for
m
er
dur
ing the ignition c
y
c
le.
5.
If
120VAC is
not pr
es
ent, the IG
ST
Boar
d in the Contr
ol Box
m
ay
be def
ec
tive. Ref
er
f
ault to qualif
ied s
er
v
ic
e per
s
onnel.
6.
W
hile ex
ter
nally
ar
c
ing the s
par
k
ignitor
, obs
er
ve the
open/c
los
e indic
ator
in the Saf
ety
Shut-
O
ff
Valve to ens
ur
e it is
opening. If
the valve does
not open, c
hec
k
f
or
120VAC at the
valves
input ter
m
inals
. If
120VAC is
not pr
es
ent, the IG
ST
boar
d in the Contr
ol Box
m
ay
be def
ec
tive. Ref
er
f
ault to
qualif
ied s
e
rv
ic
e per
s
onnel.
7.
Chec
k
pos
ition of
s
taged ignition m
anual ball valve (
F
ig. 8-
1)
8
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4