Firmware V3.13
21.04.2021
31/466
5.4.2 Standalone operation using activated local pressure transmitter
Only UA 410 E AC
If this operating mode is used, the suction gas temperature t
0
for determination of the superheat is calculated
using the suction gas temperature t
0
coming from the local pressure transmitter
and
the value of the evaporator
outlet sensor R6.x; see chapter
. This operating mode is recommended for evaporators with
high refrigerating capacity that require
high control dynamics
:
The determination of the superheat via the local pressure transmitter is activated by setting the parameter
AIn1
aktiv
to "ON" (menu 6-2-6). The suction gas temperature t
0
determined using the local pressure transmitters is
always the preferred one; even if the suction gas temperature t
0
transmitted by the pack controller via the CAN
bus is available in the controller, as the controller is integrated in the
ATTENTION
In the event of failure of the pressure transmitters
and
the CAN bus (suction gas temperature t
0
for
superheat control is no longer available), the controller can operate
to a limited extent
in the so-called
standalone mode. This means that the case controller operates autonomously. In this case, R5.x
and
R6.x are necessary sensors and
must
be connected; see chapter
.
Further parameters for the configuration of local pressure transmitters must be observed; for further
details, see chapter
Summary of Contents for Case Controller UA 4 E Series
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