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Fresh air blower
Control technology has been integrated in the
new fresh air blower.
It includes the following features:
– Integrated control unit with diagnostic
capability via the operating and display
unit E87 (fault memory and measured
value block diagnosis-capable control
unit),
– optimised bearings for smoother running,
– separate solar input.
The required blower speed is calculated in the
operating and display unit E87, and requested
by the control unit for fresh air blower J126
via a PWM signal.
In the case of malfunctions, such as e.g. a stiff
or blocked blower, this is signalled to the
operating and display unit E87 by duty cycle
changes based on the altered frequency. The
relevant fault is set.
The blower bearings have been re-engineered
in order to optimise the effectiveness of the
system.
This particularly benefits solar operation.
The energy supplied by the solar roof is
utilised to drive the fresh air blower by means
of special electronics via the separate solar
input in the blower.
SSP254_037