Rooms Are Too Cold - Viessmann Vitotronic 200 Series Operating Instructions For The System User

Rooms are too cold

Cause
The heating system is off.
Control unit incorrectly adjusted.
■
Remote control (if installed) set incorrectly.
■
Separate operating instructions
The DHW cylinder is being heated.
No fuel.
"Fault" is displayed, and the red fault indicator flashes.
"Screed drying" is active.
Only with the Vitotronic 200, type KW6B:
"Combustion controller" is shown on the display.
"Fault" is displayed and the red fault indicator on the
burner is illuminated.
Remedy
Turn on the ON/OFF switch (see diagrams from
■
page 20).
Switch ON the mains isolator (if installed, outside the
■
boiler room).
Reset the MCB in the power distribution board (main
■
domestic MCB).
Central heating must be enabled.
Check settings and correct if required:
Operating program (see page 23)
■
Room temperature (see page 23)
■
Time (see page 31)
■
Time program, central heating (see page 23)
■
Heating curve (see page 24)
■
Wait until the DHW cylinder has been heated up.
Possibly reduce the DHW draw-off rate or temporarily
reduce the standard DHW temperature.
With oil/LPG:
Check the fuel reserves and re-order if required.
With natural gas:
Open the gas shut-off valve. If necessary, check with
your gas supply utility.
Call up and acknowledge the type of fault (see
page 35). Notify your heating contractor if necessary.
No action required.
After expiry of the screed drying time, the selected op-
erating program will become active.
Press R (see diagram on page 21).
Acknowledge the fault (see page 35).
Danger
If faults are not rectified, they can have life
threatening consequences.
Do not acknowledge fault messages several
times in quick succession. If a fault occurs re-
peatedly, notify your heating contractor so the
cause can be analysed and the fault rectified.
Press the reset button on the burner. If there is no reset
button, turn the ON/OFF switch (see diagrams from
page 20) first OFF and then ON again.
Danger
If faults are not rectified, they can have life
threatening consequences.
Do not acknowledge fault messages several
times in quick succession. If a fault occurs re-
peatedly, notify your heating contractor so the
cause can be analysed and the fault rectified.
What to do if...
37