What To Do If; Rooms Are Too Cold - Viessmann VITOLIGNO 300-H Operating Instructions For The System User
Heating system with ecotronic weather-compensated, digital boiler and heating circuit control unit
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What to do if...
Rooms are too cold
Cause
Central heating is switched off.
Control unit incorrectly set.
Control unit fault:
"Fault" is shown in the display. The red
fault indicator flashes.
The heating circuit pump is not working.
Heating circuit with mixer: Mixer motor
faulty
56
Remedy
Check the room thermostats. If necessa-
ry, change the operating program.
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)
Check the type of fault (see page 50) and
notify your local heating contractor.
Contact your local heating contractor.
Unhook motorised lever A. Adjust mixer
lever B manually (e.g. to "5").
Inform your local heating contractor.
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