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

Rooms are too hot

Cause
Control unit or room temperature control
unit incorrectly adjusted.
The " " symbol is shown on the display. Notify your heating contractor of the fault

There is no hot water

Cause
The heating system is off.
Control unit incorrectly adjusted.
No fuel.
Remedy
Check settings and correct if required:
■ Room temperature or boiler water tem-
perature (see page 12)
■ Time program
Room temperature control unit
operating instructions
code.
Acknowledge the fault message with OK
(see page 20).
Remedy
■ Switch the ON/OFF switch " " (see
page 10) ON.
■ 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 14).
■ DHW temperature (see page 14).
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...
25