51
Does bur
ner light?
Does yellow flame indicator
( ) flash?
Check/change NTC
and connections
Does red lockout indicator
( ) glow after 2nd ignition
attempt?
Check ignition system and gas section
Sheet G
Ye
s
Ye
s
No
Flame super
vision device
defective, replace electronic
boards.
Check gas supply
.
Reset lockout (tur
n central
heating control to position
( ) and release). Does
sparking commence at
bur
ner?
Go to sheet H.
No
Ye
s
No
Ye
s
Go to sheet H.
Check all electrodes and leads
for damage and correct connection.
Replace if necessar
y.
No
Does sparking commence
at bur
ner now?
Ignition transfor
mer on
electronic board defective,
replace electronic boards.
No
Ye
s
