38
Display Meaning Vitovent
200-C 300-C 300-W
"Time until adjust-
ment:"
■
If "Intensive mode" was switched on externally:
Remaining time until "Intensive mode" ends automatically
("Duration, bathroom vent. 7D3B").
■
If the electric preheating coil is switched on:
Remaining run-on time of fans, to prevent overheating of the
electric preheating coil.
X — —
"Blocking time for
defrosting:"
Remaining time period until the next defrosting process of the
heat exchanger may start.
X — —
"Defrost time:" Remaining duration of the currently active defrost function X — —
"Detection, frost
pr.max.speed:"
Icing up of heat exchanger was recognised due to excessive
fan speed: Remaining time until defrost function becomes ac-
tive.
X — —
"Detection, frost
pr.min. temp:"
Icing up of heat exchanger was recognised due to supply air
temperature being too low: Remaining time until defrost function
becomes active.
X — —
"Bypass function:" "Ventilation" Bypass disabled X X X
"Cooling" Bypass active, passive cooling active X X X
"Heating" Bypass active, passive heating active X — —
"Passive de-
frost"
Defrost function for heat exchanger is active.
Electric preheating coil is switched off.
X — —
"Defrosting w
PHR"
Defrost function for heat exchanger is active.
Electric preheating coil is switched on.
X — —
"Voltage EHA:" Control voltage, exhaust air fan X X X
"Voltage SUP:" Control voltage, supply air fan X X X
"CO2 control" "Is active" Air flow rate was adjusted due to excessive
CO
2
concentration.
— X X
"Humidity control" "Is active" Air flow rate was adjusted due to excessive hu-
midity.
— X X
"Geothermal heat ex-
changer:"
"Open (temp
bottom)"
Temperature at external temperature sensor
falls below "Min. temperature, geoth. heat
exchanger C1AA". The 3-way diverter damp-
er (on site) is open, so the supply air flows
through the geothermal heat exchanger for
preheating.
— X —
"Closed" Temperature at external temperature sensor
lies between "Min. temperature, geoth. heat
exchanger C1AA" and "Max. temperature,
geoth. heat exchanger C1AB". The supply
air does not flow through the geothermal heat
exchanger.
— X —
"Open (temp
top)"
Temperature at external temperature sensor
exceeds "Max. temperature, geoth. heat ex-
changer C1AB". The 3-way diverter damper
(on site) is open, so the supply air flows
through the geothermal heat exchanger for
cooling.
— X —
"Optional temp. sen-
sor"
Temperature at external temperature sensor in °C, e.g. integra-
ted into the geothermal heat exchanger
— X —
Diagnosis
Ventilation (cont.)
5816558
Diagnosis
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