15
The room temperature
is too low
When the room temperature is below
10°C, the unit will stop in order to
prevent further cooling of the house.
This may, for instance, be during a
period when the house is unoccupied and
the heating system is off.
Heat up the house and reset the alarm.
16
Software error
Error in the control system program.
Contact Service.
17
Watchdog warning
Error in the control system program.
Contact Service.
18
Content of database
changed
Parts of the program setting have been
lost.
This may be due to a prolonged power
cut or a lightning strike.
The unit will continue to operate with
standard settings.
Reset alarm.
Set the desired week program.
Contact service if the unit does not
operate to your satisfaction/ as before,
as some subprograms may have been
lost. (Subprogram is only available for
service).
19
Change filter
The filter monitor has been set at X
amount of days for check-up/change of
filter (30, 90, 180, 360 days).
The standard setting is 90 days.
Clean/change filter.
Reset alarm.
21
Check date and time
Is displayed during power cuts.
The settings of the weekly clock must be
checked and adjusted if necessary.
Reset alarm.
22
Error in air
temperature
It is impossible to heat the supply air as
desired (only applicable if you have an
after-heating element). The after-
heating element and the unit cannot
increase the temperature to the desired
level.
Set a lower supply air temperature.
Reset alarm.
27-58
Error on the
temperature sensor
One of the temperature sensors has
either short circuited, been
disconnected or is defective.
Register which sensor, Tx, is faulty and
contact service.
71
Error de-icing heat
exchanger
Max. de-icing time exceeded for
counterflow heat exchanger. This may
be due to the unit being exposed to very
low temperatures.
If resetting the alarm does not help,
contact service. Register the current
operating temperatures from the “SHOW
DATA” menu in order to ease the service
process.
72
Abnormal low
evaporator
temperature
Abnormal evaporator temperature (T6)
is due to insufficient air flow.
Change filters, check outdoor air intake
is not stopped.
In case of constant fault contact service.
92
Backup error
Error when writing or entering the
installer’s settings.
Contact service.
96
Error in damper test
Damper (open / closed) not fulfilled
Must be unset in the Alarm
36
