Viessmann Vitoligno 250-S, Руководство по эксплуатации

Страница: 40 / 56

40
Cause Remedy
Central heating is switched off. Check the room thermostats. If necessary, change the
operating program.
Control unit incorrectly set. Check the settings and correct if required:
■
The heating circuit must be ON (see page 21)
■
Room temperature (see page 20)
■
Time (see page 32)
■
Switching times (see page 22)
The temperatures of the heating water buffer cylinder
and the boiler water are low. Charge the boiler with fuel. Heat up the boiler again.
Control unit fault:
"Fault" is displayed; the red fault indicator flashes.
Check the type of fault (see page 37) and notify your
heating contractor.
The heating circuit pump is not working. Contact your heating contractor.
Heating circuit with mixer: Mixer motor faulty Unhook motorised lever
A
. Adjust mixer lever
B
man-
ually (e.g. to "5").
Notify your heating contractor.
Rooms are too hot
Cause Remedy
Control unit incorrectly set. Check the settings and correct if required:
■
The heating circuit must be ON (see page 21)
■
Room temperature (see page 20)
■
Time (see page 32)
■
Switching times (see page 22)
Control unit fault or outside temperature sensor/boiler
water temperature sensor faulty:
"Fault" is displayed; the red fault indicator flashes.
Check the type of fault (see page 37) and notify your
heating contractor.
Heating circuit with mixer: Mixer motor faulty Unhook motorised lever
A
. Adjust mixer lever
B
man-
ually (e.g. to "5").
Notify your heating contractor.
What to do if...
Rooms are too cold
5684 987 GB