ECKELMANN Case Controller UA 4 E Series, Инструкция по эксплуатации

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Firmware V3.13 21.04.2021 29/466
5.3 CAN bus mode
The controller is integrated in the CAN bus in this operating mode. The remote control via a terminal is
generally performed via the system centre, which also takes care of the alarm management. In addition, the
suction gas temperature t
0
of the pack controller belonging to the refrigeration circuit via the CAN bus is used to
determine superheat.
For this operating mode, a correction offset fro the pressure losses in the suction line must be determined for
each refrigeration point and set to "xx" using the parameter Korroff. t
0
(menu 6-3). If the parameter Korroff. t
0
is
set to "--", the controller is then in Standalone operation !
•
•
ATTENTION
Compressor damage! Danger due to liquid refrigerant on the suction side of the compressor!
Operating mode t
0
via CAN bus (menu 6-2-6)
The evaporator inlet sensors R5.1 and R5.2 should also be connected in the t
0
via CAN
bus operating mode. This results in improved emergency running characteristics in the event of
failure of the CAN bus transmission. In standalone operation (without local pressure transmitter),
the sensors, R5.1 and R5.2
must be connected; see chapter Standalone operation using
evaporator inlet sensors !
Operating mode t
0
local Z1 / Z2 (menu 6-2-6)
In the case of evaporators with high cooling capacity which require high control dynamics , the
superheat control should be realised via a local pressure transmitter (only UA 410 E AC); see
chapters
Standalone operation using activated local pressure transmitter and Emergency Op. .
Superheat control only via sensors R5.1 and R5.2 is not recommended, as there is a risk of
evaporator flooding due to the slow response behaviour!
