LED Constant On
Normal Operation
HEA
TING MODE
Problem
L
ED
L
ight
N
ot On
Is pr
oper v
oltage
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
oltage, 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
or
continuity
.
Are 2
4
v
olts
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
Is pr
oper v
oltage
deliv
ered t
o
select
or switch?
Check all wiring f
o
r
def
ects. R
epair or
repalce if needed.
Ye
s
Does select
or
switch send
v
oltage t
o
the
transf
ormer?
Check v
oltage
output at switch
terminals. If no
v
oltage, replace
switch.
Ye
s
No
No
No
Does transf
ormer
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
olts?
Def
ectiv
e transf
ormer
.
R
elace transf
ormer
.
No
Is 2
4
v
olts
deliv
ered t
o
thermostat?
Check wiring betw
een
transf
ormer and
thermostat. Check
continuity
. R
epair 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.
21
Содержание Therma Grow HW220
Страница 2: ......
Страница 27: ...26 Electrical Connection and Ladder Diagram 115 Volt Supply...
Страница 28: ...27 230 Volt Supply TRANSFORMER 24 VOLT 120 VOLT...