Operating instructions

Troubleshooting guide
33
Diagnosis and correction Vitocontrol-S, VD2/CT3/CM2
If a fault occurs on the heating system, it will be indicated in the display
window and by the flashing red fault lamp.
Using the scan facility, you can read off the fault code yourself and inform your
heating contractor accordingly.
Outdoor sensor
Acknowledge? Yes
1. Open the hinged cover on the pro-
gramming unit.
2. Press for fault search.
The error source is dis-
played in plain language and
in the form of a fault code.
3. Press ; the display chan-
ges to ”Acknowledge?
Yes”.
4. / Press / for ”Yes” or
”No”.
5. Press to confirm;
the display changes and
shows the boiler temperatu-
re.
6. Close the hinged cover on the pro-
gramming unit.
Example
U
UU
U Fault display
1
11
1 Error number
1
11
1 Sensor designation
plug designation
Open circuit
or
Short circuit
Press ”Acknowledge?” to confirm
that you have noted the fault.
Please note:
The fault message will re-appear
at 7.00 hrs on the following day if
the fault is not corrected in the
meantime.
The red fault lamp continues to
flash until the fault has been
corrected.
To call up an acknowledged fault message
1. Press for approx.
2 seconds.
2. / Press / to display
further faults.
The fault is displayed.
Only if two or more faults have
occurred.
5351 341 v1.2
DFault
Tu
°C
U