84
Changing the rotational direction of the mixer motor (if required)
gS
BU
|
~
Fig. 56
1.
Remove the top casing cover of the extension kit.
Danger
An electric shock can be life threatening.
Before opening the boiler, disconnect it from
the mains voltage, e.g. at the fuse or mains
isolator.
2.
At plug
gS
, swap over the cores at terminals "
|
"
and "
~
".
3.
Refit the casing cover.
Checking the raised system return temperature sensor
10
1
10
30
50
70
90
110
Temperature in °C
0.4
0.6
0.8
2
4
6
8
20
Resistance
in kΩ
Fig. 57
Sensor type: NTC 10 k
Ω
1.
Remove plug
?
at slot TS1 on the extension kit.
2.
Check the sensor resistance and compare it to the
curve.
In the event of severe deviation replace the sensor.
Checking the system return temperature sensor
10
1
10
30
50
70
90
110
Temperature in °C
0.4
0.6
0.8
2
4
6
8
20
Resistance
in kΩ
Fig. 58
Sensor type: NTC 10 k
Ω
1.
Remove plug
?
at slot TS2 on the extension kit.
2.
Check the sensor resistance and compare it to the
curve.
In the event of severe deviation replace the sensor.
Troubleshooting
Repairs
(cont.)
5839343
Diagnosis
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