L.B. White HW120 Plus Therma Grow - Manual (Page 21)

21
Problem LED Constant On
L
E
D
L
ig
h
t
N
o
t
O
n
Normal Operation
Is pr
oper v
o
ltage
supplied t
o
heat
er?
Is select
or switch
set t
o
HEA
T
?
Check data plat
e f
o
r
electrical supply
req
uirments.
Pr
o
vide pr
oper
v
o
ltage, contact electrician.
Ye
s
No
Ye
s
Ye
s
Ye
s
Def
ectiv
e wire or
electrical connection.
R
eapir or replace.
Is
thermostat
def
ectiv
e? Check f
o
r
continuity
.
Are 2
4
v
o
lts
supplied t
o
ignition
contr
ol t
erminal W
fr
om thermostat?
R
eplace
thermostat
Is heat
er
connect
ed t
o
po
w
er supply?
No No
No
Ye
s
P
osition select
or
switch t
o
HEA
T.
Ensure heat
er is
connect
ed t
o
po
w
e
r
supply
. Check
break
er
s
HEA
TING MODE
Is pr
oper v
o
ltage
deliv
ered t
o
select
or switch?
Check all wiring f
o
r
def
ects. R
e
pair or
repalce if needed.
Ye
s
Does select
or
switch send
v
oltage t
o
the
transf
ormer?
Check v
oltage
output at switch te
rminals. If no
v
o
ltage, replace
switch.
Ye
s
No
No
No
Does transf
o
rmer
receiv
e v
oltage
fr
om switch?
Check wiring f
o
r
continuity betw
een
transf
ormer and
switch. R
epair or
replace
No
Ye
s
Ye
s
Does transf
ormer
reduce incoming
v
oltage t
o
2
4
v
o
lts?
Def
ectiv
e transf
ormer
.
R
elace transf
o
rmer
.
No
Is 2
4
v
o
lts
deliv
ered t
o
thermostat?
Check wiring betw
een
transf
ormer and
thermostat. Check continuity
. R
e
pair as
needed.
No
Ye
s
Ye
s
Is
thermostat set
abo
v
e
r
oom
te
m
perature?
Set thermostat
abo
v
e
r
oom
te
m
perature.
No
Def
ectiv
e
ignition contr
ol.