L.B. White COMBO-MCS - Manual (Page 20)

GG
re
e
n
L
E
D
o
n
p
ro
g
ra
m
m
a
b
le
c
o
n
tr
o
ll
e
r
is
s
te
a
d
y
O
N
G
re
e
n
L
E
D
o
n
p
ro
g
ra
m
m
a
b
le
c
o
n
tr
o
ll
e
r
is
O
F
F
.
N
o
d
is
p
la
y
a
t
to
u
c
h
p
a
d
,
a
ll
in
d
ic
a
to
r
li
g
h
ts
a
re
o
ff
.
H
e
a
te
rs
d
o
n
o
t
o
p
e
ra
te
.
Is main po
w
er supply
fuse in S
m
a
rt
B
o
x
™
deliv
ering 120 V
A
C t
o
transf
ormer
s?
No
Is 120 V
A
C
deliv
ered t
o
Smar
t Bo
x
™
?
Ye
s
Check break
er
s in building.
Check po
w
er cor
d
f
or tight
connections and continuity
.
Check po
w
er outlet f
o
r
def
e
cts, corr
osion, etc.
No
R
eplace the fuse. V
erify
b
y checking v
oltage t
o
and fr
om fuse or check continuity
.
Is upper
transf
ormer
receiving 120 V
A
C fr
om main
po
w
er fuse?
No
Ye
s
P
ro
b
le
m
2
Def
ectiv
e electrical wire or
connection. R
epair or replace as
needed.
V
erify 2
4
V
A
C betw
een the tw
o
ye
llo
w
leads, (T
erminals 1
0
and 6)
of the transf
ormer
. If absent,
replace the transf
ormer
.
Ye
s
Is
upper transf
ormer
deliv
ering 2
4
V
A
C t
o
pr
ogrammable contr
oller?
No
Ye
s
20
Cy
cle the po
w
er t
o
the
Smar
t Bo
x
™
OFF and then
ON. If the LED remains st
eady ON, replace the
contr
oller
.
P
ro
b
le
m
1
Is t
o
uch pad receiving 1
8
VDC fr
om
contr
oller?
No
Check acr
oss br
o
w
n wires at t
ouch pad. If 1
8
VDC is absent, trace the wires back t
o
the
contr
oller
.
Check f
or 1
8VDC at the pr
ogrammable
contr
oller t
erminals 5 and 6 (br
o
wn). If
present at the pr
ogrammable contr
o
ller
,
repair or replace wiring betw
een the t
o
uch
pad and the pr
ogrammable contr
oller
. If
absent, replace the pr
ogrammable contr
oller
.