46
Cause
Remedy
The control unit is set incorrectly.
Check the DHW temperature and correct it if required
(see page 28).
The DHW is being heated by the solar thermal system.
Check the settings at the solar control unit and correct
them if required.
Separate operating instructions
"External hook-up"
enabled.
No action required.
The operating program set at the control unit was e.g.
changed over via an externally connected button.
Example: In a school, heating demand exists outside of
school times, e.g. for a parents’ evening.
This function cannot be influenced via the control unit.
Once the external changeover no longer applies, the
set operating program becomes active again.
"External program"
enabled.
The operating program set at the control unit has been
changed by another control device.
You can change the operating program on the
Vitotronic control unit.
and "Fault" are displayed
Cause
Remedy
Heating system fault
Proceed as described on page 38.
and "Burner fault" are displayed
Cause
Remedy
Fault on burner control unit or boiler burner.
■
Vitotronic 300, type CM1E and Vitotronic 100,
type CC1E:
Press the burner reset button.
See separate boiler or burner instructions.
■
Vitotronic 300, type CM1I and Vitotronic 100,
type CC1I:
Follow the instructions on the display: See page 38.
Contact your contractor if the burner still fails to start.
Danger
If faults are not rectified, they can have life
threatening consequences.
Do not acknowledge fault messages several
times in quick succession. Notify your contractor
if a fault recurs. Your contractor will be able to
analyse the cause and rectify the fault.
What to do if...
The DHW is too hot
5863758
Summary of Contents for VITOTRONIC 200
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