Rooms Are Too Cold - Viessmann VITOTRONIC 100 Operating Instructions Manual

What to do if...

Rooms are too cold

Cause
The heating system is switched off.
Control unit incorrectly adjusted.
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The room temperature controller is set incorrectly.
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Separate operating instructions
The DHW cylinder is being heated.
No fuel.
"Fault" is displayed.
"Burner fault" is displayed.
"External hook-up" enabled.
"External program" enabled.
26
Remedy
Switch ON the ON/OFF switch (see page 24).
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Switch ON the mains isolator if installed (outside the
■
boiler room).
Set the MCB in the power distribution board (main do-
■
mestic MCB).
Central heating must be set.
Check the settings and correct if required:
Operating program (see page 13)
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Room temperature and boiler water temperature (see
■
page 15)
Wait until the DHW cylinder has been heated up.
Reduce the DHW draw-off rate or temporarily reduce
the DHW temperature as required.
With oil or LPG:
Check the fuel reserves and re-order if required.
For operation with natural gas:
Open the gas shut-off valve. If necessary, check with
your gas supply utility.
Check what type of fault it is. Acknowledge the fault
(see page 21). If necessary, notify your contractor.
Vitotronic 100, type CC1E:
■
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 100, type CC1I:
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Follow the instructions on the display: See page 22.
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.
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.
The operating program set at the control unit has been
changed over by another control device. E.g., by your
mobile phone using your Viessmann app.
You can change the operating program on the
Vitotronic control unit.