Viessmann VITOCROSSAL CI, Operating Instructions Manual

Page: 33 / 48

33
Cause Remedy
The heating system is switched off.
■
Turn on the ON/OFF switch (see diagrams from
page 17).
■
Switch ON the mains isolator if installed (outside the
boiler room).
■
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 19)
■
Room temperature (see page 19)
■
Time (see page 27)
■
Time program, central heating (see page 19)
■
Heating curve (see page 20)
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 standard DHW temperature as required.
No fuel. For operation with LPG:
Check the fuel reserves and re-order if required.
For operation with natural gas:
Open the gas shut-off valve. If necessary, check with
your gas supply utility.
"Combustion controller" is displayed. Press button R (see page 17).
Acknowledge the fault (see page 31).
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 red fault indicator flashes. Check what type of fault it is. Acknowledge the fault
(see page 31). If necessary, notify your heating contrac-
tor.
"Screed drying" is activated. No action required.
After expiry of the screed drying time, the selected op-
erating program will become active.
The mixer motor is faulty. Adjust the mixer manually.
What to do if...
Rooms are too cold
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