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19
Rev 1.5
I
If using the linear control mode it is important to know that there exists a sub mode called low
noise mode. When the nominal speed set by user is under the allowed minimal speed, the
device will switch off all fans.
Linear control mode is the default setting at delivery.
If is it not necessary to cool down the device the fans stand still. After reaching of
“sensorWarningThreshold” the behavior of fan control is equal to the linear control mode.
The controlling result of fan speed is pictured in figure 3.10.
Speed of Fan [rpm]
Operation
temperature
[°C]
Fan
max
Fan
nom
Device
switch off
Linear fan
control
T
warn
T
alarm
T
fail
Figure 3-9: Linear control mode