failed
.
Replace fan
.
as necessary
.
Replace ignition
module
.
Replace ignition
module.
No
Are line and neutral
supply wires reversed?
Yes
Correct Wiring
START
Yes
No
Recycle power
.
Is there
power at lockout signal
immediately after
restoring power?
Recycle power to the
blower. Is there power out
No
from exhaust fan output
on ignition module?
Yes
Replace Fan.
Yes
Yes
Turn up thermostat.
Does the fan turn on
?
Place a jumper across
No
the thermostat terminals
.
No
Does the fan turn on
?
Yes
Check thermostat wiring
and replace thermostat if
necessary.
Is there po
w
er (230V)
at the burner?
No
Check relay wiring
(if applicable) and
w
iring
to the burner.
Is wiring between burner and
fan correct?
No
Correct wiring
.
Yes
Unplug burner.
Does the fan
turn freely?
No
Fan bearings may have
No
Is the fan obstructed?
Yes
Is there spark at the igniter? No
Unplug burner and check
Is the igniter gap
Is the flue pipe or
Yes
electrode and ignition wire.
No
Are they damaged?
Yes
Replace electrode and
ignition
w
ire as needed.
set at
3
mm?
No
Carefully reset gap
to
3
mm.
Yes
the inlet of the
Yes
Remove obstruction.
burner obstructed?
No
Are the hoses to the pressure
Repai r
,
replace or
s
w
itch secure and leak fr ee
?
No
tighten hoses
Yes
Replace automatic
control unit.
Remove electrical plug
from pressure switch.
Recycle power to the
Yes
Replace pressure switch
.
burner
.
Five seconds
after fan starts
,
place
jumper wire between
black and white leads.
Wait 10 seconds
.
Is there
a spark at the igniter?
A
IRA
ATH I
NS
T
A
L
L
A
T
IO
N
O
P
E
RA
T
IO
N
AND
S
E
RV
ICE
M
ANUAL
1
6
.1
Trou
b
les
ho
ot
ing
F
low
C
ha
rt
(L
ine
ar
, D
ou
ble
Linea
r and
U
-T
u
b
e
)
64
of
73
No
