38
Cause
Remedy
Vitoair draught stabiliser faulty.
Contact your local heating contractor.
Press the rotary selector on the motor and turn it past
position
A
as far as it will go.
A
Mixer motor faulty.
Adjust the mixer manually.
Rooms are too hot
Cause
Remedy
■
Control unit set incorrectly.
■
Remote control (if installed) set incorrectly.
Separate operating instructions
Check settings and correct if required:
■
Operating program (see page 23)
■
Room temperature (see page 23)
■
Time (see page 31)
■
Time program, central heating (see page 23)
■
Heating curve (see page 24)
"Fault"
is displayed, and the red fault indicator flashes. Call up and acknowledge the type of fault (see
Mixer motor 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 20).
■
Switch ON the mains isolator (if installed, outside the
boiler room).
■
Reset the MCB in the power distribution board (main
domestic MCB).
■
Control unit set incorrectly.
■
Remote control (if installed) set incorrectly.
Separate operating instructions
DHW heating must be enabled.
Check settings and correct if required:
■
Operating program (see page 28)
■
DHW temperature (see page 14)
■
Time program, DHW heating (see page 28)
■
Time (see page 31)
No fuel.
With oil/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...
Rooms are too cold
(cont.)
5592667