56
Cause
Remedy
Central heating is switched off.
Check the room thermostats. If necessa-
ry, change the operating program.
Control unit incorrectly set.
Check the settings and correct if required:
■ The heating circuit must be on (see
page 24)
■ Room temperature (see page 24)
■ Time (see page 46)
■ Switching times (see page 25)
Control unit fault:
"Fault"
is shown in the display. The red
fault indicator flashes.
Check the type of fault (see page 50) and
notify your local heating contractor.
The heating circuit pump is not working.
Contact your local heating contractor.
Heating circuit with mixer: Mixer motor
faulty
Unhook motorised lever
A
. Adjust mixer
lever
B
manually (e.g. to "5").
Inform your local heating contractor.
What to do if...
Rooms are too cold
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