Rooms Are Too Hot; There Is No Hot Water - Viessmann VITODENS Series Operating Instructions Manual

Rooms are too hot

Cause
Control unit or room temperature control-
ler incorrectly adjusted.
Symbol " " is displayed.

There is no hot water

Cause
The heating system is off.
Control unit incorrectly adjusted.
No fuel.
Remedy
Check settings and correct if required:
■ Heating flow temperature (see
page 12)
or
Room temperature (see room temper-
ature controller operating instructions)
■ Time (see page 20 and room tempera-
ture controller operating instructions)
■ Time program (see page 13 and room
temperature controller operating in-
structions)
Notify your heating contractor of the fault
code.
Acknowledge the fault message with OK
(see page 25).
Remedy
■ Switch ON/OFF switch " " ON (see
page 10).
■ Switch ON the mains isolator, if instal-
led (outside the boiler room).
■ Reset the MCB in the power distribution
board (main domestic MCB).
Check settings and correct if required:
■ DHW heating must be enabled (see
page 16)
■ DHW temperature (see page 16)
■ Time (see page 20)
■ Time program (see page 17)
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.
What to do if...
29