Bradford White U100L199E N Series, Руководство по обслуживанию

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W ith f l ame sensor D isconnected
from ignition modu l e, chec k
continuity to ground .
I s there continuity to ground ?
N
Y
Flame Se n sor Testi ng Pro c e d ure
Refer to i ll ustration be l ow, is there
a minimum of 1 micro amp during
1 . 5 second f l ame proving period ?
Y
N
I s f l ame sensor free
of o x idation ?
C l ean or rep l ace
f l ame sensor .
(see “F l ame Sensor
Rep l acement
Procedure”)
N
I s ceramic of f l ame
sensor crac k ed ?
Rep l ace f l ame sensor .
(see “F l ame Sensor
Rep l acement
Procedure”)
Y
N
F l ame sensing circuit O K
Y
Refer to ignition modu l e / contro l board
i ll ustration . (2 4 vo l ts shou l d maintain beyond the
1 . 5 second f l ame proving period . )
I s there 2 4VA C between P5(5) and P5(8) ?
Y
N
Ca ll for
technica l support
Rep l ace f l ame sensor with
gas k et
and / or wire l ead .
(see “F l ame Sensor
Rep l acement Procedure”)
Remove f l ame sensor from water heater .
Chec k continuity from tip of f l ame sensor
to end of wire l ead .
I s there continuity ?
N
Y
W AR NIN G
1 2 0 vo l t potentia l exposure . Use caution
making vo l tage checks to avoid
persona l injury . F l ame sensor may be
too hot to hand l e , take necessary
precautions
4 0
V olt meter set to
M icro amps setting
(
ђ
A )
M eter probe
M eter probe
Flame sensor
terminal on
control board.
Flame sensor
terminal
1 2 3
8
6
5
4
3
1
1 2
1
4
1
3
3
2
1
1
5
3
P2 P4 P5 P7 P3
CO N TRO L BOARD
P10 P9 J1
DIREC T SP ARK IGNI T ION MODEL S
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