Viessmann LB1 - Page 36

36
K
Speed, supply air fan
Vitovent 200-C:
Symbol flashes: Defrost of heat exchanger active
Meaning of values and symbols
Display Meaning Vitovent
200-C 300-C 300-W
Bypass not active: Outdoor air is rout-
ed via heat exchanger.
X X X
Bypass active (passive heating/cool-
ing): Extract air is not routed via the
heat exchanger.
— X X
Bypass active (passive heating/cool-
ing or defrost/frost protection function):
Outdoor air is not or only partially
routed via the heat exchanger.
X — —
"ODA" 3.0 Set temperature in °C for control of
electric preheating coil in conjunction
with frost protection comfort function
X — —
2.5 Outdoor air temperature in °C, meas-
urement downstream of electric pre-
heating coil (accessories)
X X X
"Status" Frost protection function active, with or
without electric preheating coil
X X X
Icing up of heat exchanger due to in-
adequate supply air temperature rec-
ognised
X X X
Icing up of heat exchanger due to ex-
cessive fan speed recognised
X X X
3 Set ventilation level X X X
3 Current ventilation level X X X
"EHA" 4.5 Exhaust air temperature in °C — — —
"EHA vol." 170
Exhaust air flow rate in m
3
/h
X X X
"Humid."
Highlighted white: Humidity is crucial for
air flow rate adjustment.
(CO
2
/humidity sensor or central humidi-
ty sensor required, accessories)
72 Actual relative humidity in % X X
"SUP"
Highlighted white: Differential between
the supply air temperature and the set
value is crucial for air flow rate adjust-
ment.
16.5 Set supply air temperature in °C
Shown only in relation to frost protec-
tion with electric preheating coil: Set
temperature for controlling the output
of the electric preheating coil during
defrosting via bypass
X — —
24.3 Actual supply air temperature in °C,
captured downstream of the reheating
coil (accessories)
X — —
Diagnosis
Ventilation: Overview (cont.)
5816558
Diagnosis