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Viessmann VITODENS 100-W - 2023 Manual

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Cause Remedy
The heating system is switched off. ■Turn on the ON/OFF switch.
■Switch ON the mains isolator if installed (outside the
boiler room).
■Reset the MCB in the power distribution board (main
domestic MCB).
Control unit is not set correctly. Check and correct the DHW temperature.
No fuel. With 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.
" " is shown on the display. Notify your heating contractor of the fault code shown.
" " and the fault code flash on the display. The burner
does not start.
Reset the burner fault: See page 29.
Notify your heating contractor if the fault recurs.
Danger
If faults are not rectified, they can have life
threatening consequences.
Do not reset the burner fault several times in
quick succession. Notify your heating contractor
if a fault recurs. Your heating contractor will be
able to analyse the cause and rectify the fault.
"Filter strainer" dirty
(Gas condensing combi boilers only).
Have the filter strainer checked/replaced by your con-
tractor.
The DHW is too hot
Cause Remedy
The control unit is not set correctly. Check and correct the DHW temperature.
" " and the fault code are flashing
Cause Remedy
The burner does not start. Reset the burner fault: See page 29.
Notify your heating contractor if the fault recurs.
Danger
If faults are not rectified, they can have life
threatening consequences.
Do not reset the burner fault several times in
quick succession. Notify your heating contractor
if a fault recurs. Your heating contractor will be
able to analyse the cause and rectify the fault.
" " is shown
Cause Remedy
Heating system fault Notify your heating contractor of the fault code.
What to do if...
There is no hot water
6167584
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Others manual(s) of Viessmann VITODENS 100-W - 2023

Viessmann VITODENS 100-W - 2023 User Manual - German - 44 pages

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