1.
&
Boiler water temperature sen-
sor
Pull the leads off the boiler tem-
perature sensor and check the
resistance.
&
Comfort sensor
Pull plug
%
from the cable har-
ness at the control unit and check
the resistance.
&
Flow temperature sensor
Pull plug "X3" from the control
unit and check the resistance
across terminals "X3.4" and
"X3.5".
2.
Compare the actual sensor resis-
tance with the curve.
3.
Replace the sensor in case of
severe deviation.
Danger
The boiler water tempera-
ture sensor is immersed in
the heating water (risk of
scalding).
Drain the boiler before
replacing the sensor.
Repairs
(cont.)
92
Troubleshooting
5592
817
GB
Summary of Contents for VITOPEND 200
Page 12: ...Opening the control unit casing 12 Installation sequence 5592 817 GB...
Page 16: ...Fitting the programming unit into the control unit 16 Installation sequence 5592 817 GB...
Page 17: ...Fitting the front panel 17 Installation sequence 5592 817 GB Installation...
Page 113: ...Connection and wiring diagram internal connections 113 Designs 5592 817 GB Service...
Page 119: ...Parts lists cont 119 Parts lists 5592 817 GB Service...
Page 120: ...Parts lists cont 120 Parts lists 5592 817 GB...
Page 121: ...Parts lists cont 121 Parts lists 5592 817 GB Service...
Page 122: ...Parts lists cont 122 Parts lists 5592 817 GB...
Page 130: ...130 5592 817 GB...
Page 131: ...131 5592 817 GB...