Viessmann Vitovalor PT2, Operating Instructions Manual

Page: 41 / 56

41
Cause Remedy
The gas condensing module is switched off.
■
Turn on the ON/OFF switch (see page 22).
■
Set the MCB in the power distribution board (main do-
mestic MCB).
■
Control unit incorrectly adjusted.
■
The remote control (if installed) is set incorrectly.
Separate operating instructions
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?
The DHW cylinder is being heated. Wait until the DHW cylinder has been heated up.
Reduce the DHW draw-off rate or temporarily reduce
the set DHW temperature as required.
No fuel. Open the gas shut-off valve. If necessary, check with
your gas supply utility.
"Burner fault" is displayed. 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.
"Fault" is displayed. The light bar is flashing. 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.
"Screed drying" is activated. No action required.
After expiry of the screed drying time, the selected op-
erating program will become active.
Rooms are too hot
Cause Remedy
■
Control unit incorrectly adjusted.
■
The remote control (if installed) is set incorrectly.
Separate operating instructions
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?
"Fault" is displayed. The light bar is flashing. 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.
"Screed drying" is enabled No action required.
After expiry of the screed drying time, the selected op-
erating program will become active.
What to do if...
Rooms are too cold
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