Operating instructions

45
M
M
a
a
i
i
n
n
t
t
e
e
n
n
a
a
n
n
c
c
e
e
,
,
T
T
r
r
o
o
u
u
b
b
l
l
e
e
s
s
h
h
o
o
o
o
t
t
i
i
n
n
g
g
&
&
R
R
e
e
p
p
a
a
i
i
r
r
s
s
Repair step 6
Figure 38 / Diagram 2
• Removal of the flame sensor (11) is described in repair step 1.
• Use the digital multimeter to check the flame sensor (11). If the
resistance value lies outside the table of values or the diagram,
then replace the flame sensor (11).
• Installation of the flame sensor (11) is described in repair step
2.
Check flame sensor
Tem perature (°C)
Resistance (
Ω)
Temp[°F]
Table of values
Temp[°C] -50 0 50 100 150 200 250 300 350 400
R [Ω] 803 1000 1194 1385 1573 1758 1941 2120 2297 2470
Diagram 2
-58 32 122 212 302 392 482 572 662 752