5.0 Troubleshooting
Symptom Cause How to solve
Alarm: Fire One of the four temperature
sensors in the Danfoss Air unit,
or the temperature sensor in
the Air Dial remote control has
detected a temperature higher
than +70°C! Unit turns off, and
does not continue operation
again before the all sensors
indicate < +70°C.
Examine all rooms, leave the
premises.
If there is no longer an emergency/
the system is ready for operation,
the ventilation system should be
shut down and power switched on
again to resume normal operation.
The power can be disconnected by
pulling the power cable out of the
system.
Alarm: Sensor
error
One of the sensors in the Dan-
foss Air unit, or the temperature
sensor in the Air Dial is defective.
Contact your installer.
The system continues to run, but
with limited functionality.
Abnormally
large negative
pressure inside
the house,
doors binding
Discharge air flow is larger than
supply air flow. Either balanc-
ing has not been carried out
correctly during set-up of the
system (if negative pressure was
always present) or the unit is in
extreme defrost conditions (can
occur at outdoor temperatures
< -12°C).
There should exist a flow imbalance
of 4-10% (in favour of the discharge
air), but if you experience a perma-
nent problem with doors binding,
contact the installer. If the problem
only arises under extreme winter
condition, it is due to the integrated
defrost controller that reduces the
supply air (hence not a defect, but
an expected, and very rare occur-
rence).
Condensation
in window
frames occurs
Condensation occurs as a result
of low surface temperatures (i.e.
cold window frame or window
glass) and humid air. Typically
occurs in areas with local high
humidity, i.e. bathrooms or util-
ity rooms where clothes are drip
drying. A little condensation in a
bathroom following a shower is
normal, but it should disappear
within half an hour.
The air exchange is too low to
remove the humidity. Increase fan
step if in manual mode, or change
to either demand mode or program
mode. Go into Main menu > Set-
tings > Boost > Autoboost on/off
and enable the Autoboost.
The house is
too hot
The house thermostats are set •
too high.
Bypass is disabled on the venti-•
lation system.
Turn down the thermostats.•
Enable bypass in • Main menu >
Bypass > Auto bypass.
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