Viessmann VITOCROSSAL CI, Operating Instructions Manual

Page: 34 / 48

34
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 19)
■
Room temperature (see page 19)
■
Time (see page 27)
■
Time program, central heating (see page 19)
■
Heating curve (see page 20)
"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.
The mixer motor is faulty. Adjust the mixer manually.
There is no hot water
Cause Remedy
The heating system is 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
DHW heating must be enabled.
Check the settings and correct if required:
■
Operating program (see page 24)
■
DHW temperature (see page 24)
■
Time program, DHW heating (see page 24)
■
Time (see page 27)
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.
"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.
The DHW is too hot
Cause Remedy
The control unit is set incorrectly. Check and correct the DHW temperature if required
(see page 24)
The DHW is being heated by the solar thermal system. Check the settings at the solar control unit and correct
them if required.
Separate operating instructions
What to do if...
Rooms are too hot
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