Rooms Are Too Hot - 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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Rooms are too hot
Cause
Control unit incorrectly set.
Control unit fault or outside temperature
sensor/boiler water temperature sensor
faulty:
"Fault" is shown in the display. The red
fault indicator flashes.
Heating circuit with mixer: Mixer motor
faulty
Remedy
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.
Unhook motorised lever A. Adjust mixer
lever B manually (e.g. to "5").
Inform your local heating contractor.
What to do if...
57
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