ECKELMANN UA 400, Инструкция по эксплуатации

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Firmware V3.15 21.04.2021 42/401
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Alarm signalling when defrost is not performed
The " No Defrost ” message is output by both the master as well as the slave controller if the defrost was not
performed . The output of this message is linked to the delay time for this alarm and is therefore automatically
sent by all affected controllers if no defrost takes place. In master/slave operation the alarm “ No Defrost “ can
also mean that a slave no longer has any contact to the master. If a slave fails to receive a signal from its
defrost master for a period longer than 60 minutes, then this message is generated.
Special cases/useful information
The master/slave defrost via CAN bus cannot be used together with the wired variant of the master/slave
defrost.
UA 400 / UA 400 E mixed operation is possible with both the master/slave defrost (MSD) and the
consecutive defrost (CD).
Once a defrost has been initiated on a slave, this can only be interrupted when the parameter 2-2-1 (Defrost
1) – “ M/S Abt Fkt. ” on the slave is set to “OFF” for a minimum of 10 seconds and then reset to “ Slave ”. In
general, this procedure is only recommended for commissioning situations, as an interruption in defrosting
can result in increased icing.
Slaves with the M/S CAN address = “—“ can have external defrost sources
Slave with M/S CAN-Address “—“ -> defrost via INT / EXT possible
The master does not start the defrost of the slaves if it has already reached the defrost termination
temperature.
Even if all the slaves have already reached their defrost termination temperature, they do not switch to
cooling until the end of the delay time.
The master does not switch on the defrost heater (= relay is NOT activated) if it is already too warm.
Safe defrost, delay and drip times are transmitted to the slaves from the master during both a master/slave
defrost (MSD) and a consecutive defrost (CD) and are used irrespective of the slave parameters set by the
user.