57
Cause
Remedy
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 or outside temperature
sensor/boiler water temperature sensor
faulty:
"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.
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 hot
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