ECKELMANN UA 400 - Page 47

Firmware V3.15
21.04.2021
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Thefollowingitemsmustdefinitelybeobservedtoensurecorrectoperation.
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Damage to equipment and goods!
Faulty setting of coding switches and defrost timer (INT/EXT) can result in evaporator icing due to
non-synchronised 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. The 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 synchronised.
Operation with 1 or 2 temperature zones is possible. Defrost on demand only functions on the
master case controller. On the slave the counting rate for the defrost on demand must be set to the
value 0 (zero).
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 defrosting has been fully completed and cooling
resumes.
Any drip time which may have been set will only begin when the defrost has been completed and
cooling has resumed.
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.
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