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060804 • Version 1.6 • 22.01.2019
Fault finding instruction, continued
Inconvenience, con-
tinued
The house is being unnec-
essarily dried out.
The unit might be operat-
ing with too high level of
air exchange compared to
the size and needs of the
house.
Check if the air flow rates
correspond the size of the
house and ventilation load,
do this by controlling the air
flow rates, which is de-
scribed “
How to balance the
operate at the nominal air
change (Fan Step 3) in
Manual Operating Mode.
Low level of humidity can
be observed especially dur-
ing winter when the outside
air is very dry.
mand Mode or set the air
flow rate at Fan Step 2 or 1
in Manual Operation Mode.
Using Fan Step 2 or 1
is only recommended for a
There is damp on the inside
of the windows and other
cold surfaces (autumn,
winter and spring)
The air change is too low or
the air distribution is un-
fortunate which causes too
low air change in critical
rooms.
Accurately adjust the air
flow rates and its distribu-
tion through balancing the
valves to ensure the air
change in critical places.
Set the unit to Automatic
Demand Mode so it auto-
matically keeps the humid-
ity on a suitable level.
Do not let the unit operate
constantly on Fan Step 1 or
2 in Manual Operation
Mode as it does not guar-
antee keeping the humidity
level in the house down,
when the moisture load of
The unit is always operat-
ing at the same speed.
The unit is set to Manual
Operation Mode at one
fixed speed.
mand Mode after which the
unit is going to adjust to air
flow rates according to the
The display goes out after a
short period of time, after
which only the green light-
The display goes into En-
ergy Saving Mode after 2
minutes to effect power
The unit is operating cor-
rectly.
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