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SERVICE PROCEDURE D24-III
Main Burner Operation Testing
CAUTION
Be Careful When Making Voltage
Measurements or Jumping Terminals
Not to Damage or Deform Connectors or
Connector Pins.
DANGER
120 volt exposure. To avoid personal injury,
use caution while performing this procedure.
Condition:
Main burner will not light,
I
gnition module LED is “ON”
I
s Pilot lit?
S
ee “pilot will not light”
(
page 8).
D
oes module continue to spark
with pilot lit?
S
ee “Pilot lights, no flame signal”
(Page 9).
Disconnect “brown” wire from
“MV” terminal of ignition module.
Is there 22-27 volts AC across
“MV” terminal of Ignition Module & ground?
(see photo 14)
Disconnect brown wire lead from
“MV” terminal of gas valve.
Is there 22-27 volts AC across
brown wire lead & ground
(see photo 15)
Replace ignition
module
Be sure module LED is “ON”,
pilot is lit and module is not sparking
Recheck voltage across
“MV” terminal of Ignition Module & ground.
Is voltage present?
Check wire harness for damage or
loose connections. Repair or replace
as needed.
Check incoming gas pressure to
gas valve. if okay,
replace gas valve.
14
D
isconnect “brown”
w
ire from “MV”
l
ocation of ignition
m
odule.
G
round
C
heck voltage from
“MV” Terminal of
I
gnition module
& ground.
Reconnect brown wire
to ignition module.
N
Y
NN
Y
N
Y
Y
N
Y
Brown wire disconnected
from “MV” terminal of gas
valve
Ground lug of
gas valve
15
Page 10
10