L.B. White COMBO-MCS - Manual (Page 21)

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
b
li
n
k
in
g
0
.5
s
e
c
o
n
d
s
O
N
,
0
.5
s
e
c
o
n
d
s
O
F
F
R
e
d
s
e
n
s
o
r
fa
il
u
re
l
ig
h
t
is
o
n
.
Are all sensor
connect
or
s
secure and w
a
te
r
tight at
appr
opriat
e leads
in the
Smar
tBo
x
™
?
Ye
s
V
erify pr
oper connection of zone
sensor
s
t
o
S
m
a
rt
B
o
x
™
sensor leads.
Ensure good, tight connections, no
corr
osion, etc.
Press right sof
t k
e
y VIEW t
o
det
ermine
which sensor (T1 or T2) is inoperativ
e.
No
P
ro
b
le
m
3
Check continuity acr
oss
sensor leads. R
e
ading
should be in the range of 20 k ohm. If a reading of
o
v
erload or inf
inity is
ober
v
e
d, replace the sensor
.
F
o
rc
e
d
a
ir
o
r
s
p
a
rk
ig
n
it
io
n
r
a
d
ia
n
t
h
e
a
te
rs
d
o
n
o
t
s
ta
rt
,
zo
n
e
l
ig
h
t
is
O
N
.
Is rela
y receiving
po
w
er fr
om 120
V
A
C po
w
e
r
supply?
Ye
s
Check electrical connections,
tripped cir
cuit break
er
, def
e
ctiv
e
wiring, etc. R
epair or replace as
needed.
No
P
ro
b
le
m
4
Is rela
y sending
out 120 V
A
C t
o
heat
er
s?
Ensure rela
y is receiving 2
4
V
A
C
fr
om pr
ogrammable contr
oller
.
If 2
4
V
A
C is present at rela
y,
but
rela
y is no
t sending 120 V
A
C,
replace the rela
y.
If 2
4
V
A
C is no
t receiv
ed at rela
y
fr
om pr
ogrammable contr
oller
,
check wiring and connections.
If good, the pr
ogrammable
contr
oller is def
ectiv
e.
No
Ye
s
Is 120 V
A
C
deliv
ered at
heat
er
s?
Check po
w
e
r supply wiring ,
outlets, and electrical
connections t
o
the heat
er
.
R
epair or replace.
No
Ye
s
If 120 V
A
C is being receiv
ed
at the heat
er but heat
er is
no
t functioning, there is a
fault in the heat
er
. R
e
fer t
o
the heat
er’s Owner’s Manual
fo
r tr
oubleshoo
ting.
Z
o
n
e
1
f
o
rc
e
d
a
ir
o
r
Z
o
n
e
2
r
a
d
ia
n
t
h
e
a
te
rs
d
o
n
o
t
s
ta
rt
,
Z
o
n
e
1
o
r
2
L
E
D
i
s
O
F
F
.
T
o
u
c
h
p
a
d
d
is
p
la
y
is
f
u
n
c
ti
o
n
a
l
P
ro
b
le
m
5
F
O
R
CED AIR HEA
T
ERS ONL
Y
V
erify r
oom contr
oller is calling f
o
r heat
F
O
R
C
ED AIR AND RADIANT
: V
erify
te
m
perature set-point f
o
r the zone, using
the t
o
uch pad.
21
Ha
v
e
sensor
s
been check
ed f
o
r
continuity acr
oss
the sensor leads?
No
Ye
s
Cy
cle the po
w
e
r t
o
the
Smar
tBo
x
™
OFF and then
ON. If the LED remains in this blink patt
ern, replace
the pr
ogrammable contr
oller
.