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8.2
Fault Finding for Automatic Ignition Burner Systems
STA RT
A ll c ontrols ON
YES
I s Gre e n light ON ?
YES
I s RED loc kout wa rning
light ON ?
NO
I gnition spa rk ope ra ting ?
YES
P ilot fla m e igniting
YES
Re d "Loc kout" light
c om e s ON ?
YES
M a in burne r fire s ?
YES
B urne r ope ra ting
NO
Che c k for e le c tric a l supply
ope ra tion of e xte rna l c ontrols
& lim it the rm osta ts
YES
P re ss in re se t button on
c ontrol box or re m ote re se t
NO
Re m ove pilot burne r a s in 7.3
& inspe c t e le c trode a nd
H.T. le a d. Re pla c e if fa ulty
NO
P ilot sole noid va lve ope ning ?
NO
Use 8.4 to te st sole noid va lve
YES
Che c k fla m e c urre nt is a t
le a st 1 µ a m ps DC whe n
pilot lights
NO
Che c k for 230v a t output
from c ontrol box
YES
Use 8.4 to c he c k va lve s
YES
Page 51
WARNING Ignition output from the
spark generator is 160 kv to earth.
Extreme care must be taken
To measure flame current, connect
a 0 - 50 µA DC meter in series with
The flame probe by using the flame
probe jack plug.
If the meter reads Negative values
then reverse the test leads.
NO
re pla c e spa rk ge ne ra tor
YES
Che c k ga s is on
a nd purge d of a ir
NO
Control box fa ulty
Re pla c e
NO
Che c k I nle t pre ssure of ga s
is c orre c t for ga s type .
YES
Re m ove pilot burne r a s in 7.3
inspe c t fla m e probe a nd
le a d. Re pla c e if fa ulty
NO
Control box fa ulty
Re pla c e with c orre c t type .
NO
Control box fa ulty
Re pla c e with c orre c t type
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