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Rooms are too cold
Cause
Central heating is off.
Control unit incorrectly set.
The temperatures of the heating water buffer cylinder
and the boiler water are low.
Control unit fault:
"Fault" is displayed and the red fault indicator flashes.
The heating circuit pump is not working.
In heating circuits with mixer: Mixer motor faulty
Rooms are too hot
Cause
Control unit incorrectly set.
Control unit fault or outside temperature sensor/boiler
water temperature sensor faulty:
"Fault" will be displayed; the red fault indicator flashes.
In heating circuits with mixer: Mixer motor faulty
Remedy
Check the room thermostats.
If necessary, change the operating program.
Check the settings and correct if required:
The heating circuit must be switched on (see
■
page 25)
Room temperature (see page 24)
■
Time (see page 37)
■
Switching times (see page 25)
■
Charge the boiler with fuel and bring it up to tempera-
ture again.
Check the type of fault (see page 39) and notify your
heating contractor.
Notify your heating contractor.
Unhook motorised lever
ually (e.g. to "5").
Notify your heating contractor.
Remedy
Check the settings and correct if required:
Heating circuit (must be switched on; see page 25)
■
Room temperature (see page 24)
■
Time (see page 37)
■
Switching times (see page 25)
■
Check the type of fault (see page 39) and notify your
heating contractor.
Unhook motorised lever
ually (e.g. to "5").
Notify your heating contractor.
What to do if...
. Adjust mixer lever
A
B
. Adjust mixer lever
A
B
man-
man-
43
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