Rooms Are Too Cold; Rooms Are Too Hot - Viessmann VITOVALOR PT2 Operating Instructions Manual

Rooms are too cold

Cause
The gas condensing module is switched off.
Control unit incorrectly adjusted.
■
The remote control (if installed) is set incorrectly.
■
Separate operating instructions
The DHW cylinder is being heated.
No fuel.
"Burner fault" is displayed.
"Fault" is displayed. The light bar is flashing.
"Screed drying" is activated.

Rooms are too hot

Cause
Control unit incorrectly adjusted.
■
The remote control (if installed) is set incorrectly.
■
Separate operating instructions
"Fault" is displayed. The light bar is flashing.
"Screed drying" is enabled
Remedy
Turn on the ON/OFF switch (see page 22).
■
Set the MCB in the power distribution board (main do-
■
mestic MCB).
Central heating must be enabled.
Check the settings and correct if required:
Operating program (see page 16)
■
Room temperature (see page 26)
■
Time (see page 33)
■
Time program, central heating (see page 27)
■
Heating curve (see page 27)
■
Holiday program active?
■
Wait until the DHW cylinder has been heated up.
Reduce the DHW draw-off rate or temporarily reduce
the set DHW temperature as required.
Open the gas shut-off valve. If necessary, check with
your gas supply utility.
Reset the burner.
Danger
If faults are not rectified, they can have life
threatening consequences.
Do not acknowledge fault messages several
times in quick succession. Notify your heating
contractor if a fault recurs. Your heating contrac-
tor will be able to analyse the cause and rectify
the fault.
Check what type of fault it is. Make a note of the fault
message and acknowledge the fault (see page 38). If
necessary, notify your heating contractor.
No action required.
After expiry of the screed drying time, the selected op-
erating program will become active.
Remedy
Check the settings and correct if required:
Operating program (see page 16)
■
Room temperature (see page 26)
■
Time (see page 33)
■
Time program, central heating (see page 27)
■
Heating curve (see page 27)
■
Holidays at home active?
■
Comfort mode enabled?
■
Check what type of fault it is. Make a note of the fault
message and acknowledge the fault (see page 38). If
necessary, notify your heating contractor.
No action required.
After expiry of the screed drying time, the selected op-
erating program will become active.
What to do if...
41