L.B. White GreenGro Plus HD220, Owner'S Manual And Instructions

Page: 25 / 32

24
Three Times
(Flash Pattern Begins in 40 S
econds After
Condition Occurs.)
T
he
Module Has Gone into
S
afety
L
ockout.
Is
Pr
oper F
uel
Supplied t
o
Heat
er
Inlet?
Connect Pr
oper
Gas Supply t
o
Heat
er
. Open All
Gas Shut
of
f
V
alv
es.
Ye
s
No
Is
Pr
oper Gas
Pressure Supplied
to
Heat
er?
Ye
s
Ye
s
Pr
o
vide Pr
oper Gas
Supply and Pressure t
o
Heat
er
. R
e
fer t
o
Dataplat
e
No
No
Is
High Limit
SwitchT
ripped?
Check Continuity
If High Limit Switch is T
ripped,
R
eset the Switch and
Det
ermine Cause of High
Limit T
ripping. Check f
o
r
Loose F
an, Lo
w V
oltage, High
Gas Pressure, and Air R
estrictions.
F
our Times
Def
ectiv
e DSI Boar
d R
eplace DSI Boar
d
Does
Tw
o Stage
Gas Contr
ol V
alv
e Open
To
Fir
st or Second Stage Heat?
(T
urn Unit On. Should Hear
A
udible Click When V
alv
e
Opens, Appr
o
x. 4-5 Seconds
Af
ter P
o
w
er is
Supplied T
o
Unit.
Is Ignit
or
Pr
operly
Gapped?
Are
2
4
V
olts
Supplied t
o
Terminal “MV” on
Gas V
alv
e?
Def
ectiv
e Gas
V
alv
e. R
eplace
Gas V
alv
e.
Ye
s
Ye
s
Ye
s
Check Ignit
er Gap
and R
egap, if
Necessar
y,
t
o
Specif
ications.
-- Def
ectiv
e Wires or
Connections, R
epair or
R
eplace.
-- If Thermostat or Building
Contr
ol is Used,
Def
ectiv
e Thermostat or
Contr
ol.
-- If Thermostat is No
t
Used, Def
ectiv
e Ignition
Contr
ol Module.
No
No
No
Does Ignit
or
Spark?
Ye
s
Is
Ignit
er High V
oltage
Lead Connect
ed?
No
Is
Ignit
or Gap
P
ositioned
Pr
operly?
No
R
eposition
Ignit
er
.
(See Ser
vice
Instructions)
No
Connect High
V
oltage Lead
Ye
s
A
. Check High V
oltage Lead
F
or Continuity and Tight
Connections. R
eplace if
Def
ectiv
e.
B. Def
ectiv
e, Im
pr
operly
Gapped, or Dir
ty Ignit
er
,
R
eplace, R
egap, or Clean
Ignit
er
.
C. Def
ectiv
e Ignition Contr
ol.
R
eplace.