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Viessmann Vitotronic 200 - CO1E Manual

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38
Cause Remedy
"Burner fault" is displayed. ■Vitotronic 200, type CO1E:
Press the reset button at the boiler burner control
unit. You can access the reset button via an opening
in the outer panel.
See separate boiler or burner instructions.
■Vitotronic 200, type CO1I:
Follow the instructions on the display: See page 32.
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.
"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 Vitotron-
ic control unit.
The DHW is too hot
Cause Remedy
The control unit is set incorrectly. Check the DHW temperature and correct it if required
(see page 25).
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 Vitotron-
ic control unit.
What to do if...
There is no hot water (cont.)
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