Troubleshooting
3
Subject to modifications resulting from technical improvements!
Buderus Ltd. • http://www.buderus-domestic.co.uk
Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006
57
3.1.22 Checking the domestic hot water / mains water
supply
z
Disconnect the plug-and-socket connection on the hot-
water sensor cable (fig. 70, item 1) and/or the mains-water
sensor (fig. 70, item 2).
z
Measure resistance, take a temperature reading at the
thermal pressure gauge (tolerance ± 5 K) and compare
with the values listed in table 3. If there is any marked
mismatch, the hot-water sensor is defective.
z
If the hot-water/mains-water sensor is in order, plug it back
in.
Table 3
Resistance values for hot-water/mains-water sensor
(approximate values)
Fig. 70 Checking the domestic hot water / mains water
supply
2
1
Temperature
[°C]
Resistance
[
Ω
]
0
29490
5
23462
10
18787
15
15136
20
12268
25
10000
30
8197
35
6754
40
5594
45
4656
50
3893
55
3271
60
2760
65
2339
70
1990
75
1700
80
1458
85
1255
90
1084
95
939,6
100
817,2
