User Manual 83
DOL 534 • DOL 539
The DOL 53X controller generates an alarm for absolute high humidity
when house humidity exceeds the setting. This may be caused by e.g.
missing ventilation or a technical sensor error.
The flap alarms are technical alarms. The DOL 53X controller generates
an alarm if the actual flap opening of the air inlet or air outlet is different
from the setting calculated as the correct one by the controller.
Error in inside temperature
sensor
The DOL 53X controller generates an alarm in case of short circuit or
interruption of the inside temperature sensor. Without this sensor, DOL
53X cannot control the inside temperature and the error will, in addition
to the alarm, generate an emergency control of the ventilation system
which will open 50%.
The alarm for error in the inside temperature sensor is always a hard
alarm.
Error in outside temperature
sensor
DOL 53X generates an alarm if the outside temperature sensor is short-
circuited or disconnected.
The alarm indicates if the sensor is exposed to solar heating and
therefore shows a wrong outside temperature. DOL 53X generates an
alarm when the controller measures the inside temperature to be the
number of degrees below the outside temperature to which the function
is set (e.g. 5° C).
The DOL 53X controller generates an alarm when the tunnel
temperature exceeds the outside temperature by the number of degrees
set in the Tunnel sensor limit. Tunnel opening failure.
The alarm is active only at Tunnel ventilation.
The DOL 53X controller generates an alarm when the humidity sensor is
interrupted or the air humidity is below the setpoint.
The alarm limit is preset by the factory at a level (5%) so low that the
alarm will be generated only in case of actual sensor errors.
Auxiliary sensor error
CO2 sensor error
The DOL 53X controller generates an alarm when the values for the
sensor fall below or exceed the settings. See also paragraph 3.5.
DOL 53X triggers the alarm when the housing air’s NH
3
content is
registered to be above or below the alarm limit.
Low-rise alarm is as the factory setting interrupted. The alarm limit is
factory pre-set at such a low level (5 %) that the alarm is only usually
triggered upon intrinsic sensor errors.
In the case of a high alarm (20 ppm) DOL 53X ventilates 100%.
Also see paragraph 3.6
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