ECKELMANN Case Controller UA 4 E Series, Инструкция по эксплуатации

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Firmware V3.13 21.04.2021 77/466
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5.8.5 Master/slave mode – defrost synchronisation via wiring
All controller types except UK 100 E or KR 160 E
Requirements
External 230 V AC wiring on hardware side
Setting of the DIP switch S3, coding switch 4 must be set to ON ; for details, see chapter Setting the
controller type and other functions .
Function Description
The master/slave mode is used for refrigerated cases, for which the operation of multiple evaporators can result
in reciprocal icing of the evaporators without further protective measures.
This problem is prevented due to the defrost synchronisation in master/slave mode. All refrigerated cases and
case zones defrost simultaneously and then switch to cooling together. Multiple participating controllers are
synchronised via hardware wiring, see chapter
Wiring of the master-slave function for defrost synchronisation .
In addition, in the case of one controller in two-zone operation, this can be used to force the joint return of both
zones to cooling following a defrost.
ATTENTION
Damage to the system and stock loss! When using this function, it must be ensured that incorrect
parametrisation does not result in simultaneous defrost and cooling of the synchronised refrigeration
points.
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DANGER
This function requires additional external wiring for multiple participating controllers. It must be
ensured for the wiring of master and slave case controllers that the power supply is only
implemented with
one phase (e.g. only via L1)! For details, see chapter Wiring of the Master-Slave
function for defrost synchronisation.
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