ECKELMANN Case Controller UA 4 E Series, Руководство по эксплуатации

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Firmware V3.13 21.04.2021 81/466
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Configuration
The master-slave function can be employed with all controller types. In order to activate the master/slave mode
DIP switch 3 on coding switch 4 must be switched to ON on all participating case controllers. The change is
only adopted when the controller is restarted (switched off and back on again).
The following items must definitely be observed to ensure correct operation.
When using an external defrost timer on a master its internal defrost timer should be set to “—“. If this is
not the case then the internal defrost time will be taken into account along with the external defrost. The
signal from the external defrost timer may only be employed as an impulse (> 10 seconds) for the initiation
of the defrost. In order to configure the master’s defrost timer the parameter Defrost Timer = INT must also
be set, see menu 3-2.
Manual defrosting cannot be initiated on the slave case controller.
The No Defrost alarm applies to master and slave. Demand defrosting on the master can lead to this fault
report being generated erroneously on the slave, for example when monitoring time is set too low. Any
drain time set will not commence until defosting has been fully completed and cooling resumes.
Once defrosting is started by the internal clock, no new defrost cycle can be initiated until the safe defrost
time has expired even though the controller may have returned to cooling mode before then.
The set controller mode and activation of master-slave mode can be checked in the Type and Version
menu 6-2-1.
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ATTENTION
Damage to equipment and goods!!
Faulty setting of coding switches and defrost timer (INT/EXT) can result in evaporator icing due to
non-synchronized defrosting or failure of defrosting to take place!
Demand defrosting works only on the master case controller. The initiation of a manual defrost on
the slave is also prohibited.
Due to a defrost on demand configured in a slave it is possible that the master defrosts while the
slave continues to operate in cooling mode.
The safe defrost time for the slave must be exactly the same as the safe defrost time for the master
in order to prevent one of the two case controllers switching to cooling mode before the other as a
result of the elapse of a safe defrost time
Counting rate for demand defrosting must be set to zero (0) on the slave controller. Die Waiting
time for commencement of defrosting must not be set to any other value but 0 on the slave, as
otherwise defrosting on master and slave will not be synchronized.
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