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Digital inputs
There are two digital inputs both of which can be used for one of
the following functions:
- Case cleaning
- Door contact function with alarm
- Starting a defrost
- Coordinated defrost
- Change-over between two temperature references
- Retransmission of a contact's position via data communication
Case cleaning function
This function makes it easy to steer the refrigeration appliance
through a cleaning phase. Via three pushes on a switch you
change from one phase to the next phase.
The first push stops the refrigeration – the fans keep working
"Later": The next push stops the fans
"Still later": The final push restarts refrigeration
The different situations can be monitored on the display.
On the network a cleaning alarm is transmitted to the system unit.
This alarm can be "logged" so that proof of the sequence of events
is provided.
Door contact function
In cold rooms and frost rooms the door switch can turn the light
on and off, start and stop the refrigeration and give alarm if the
door has remained open for too long.
Defrost
Depending on the application you may choose between the
following defrost methods:
Natural:
Here the fans are kept operating during the defrost
Electric:
The heating element is activated
Brine:
The valve is kept open so that the brine can flow
through the evaporator
Start of defrost
A defrost can be started in different ways;
Interval:
Defrost is started at fixed time intervals, e.g., every
eight hour
Refrigeration time:
Defrost is started at fixed refrigeration time inter-
vals, in other words, a low need for
refrigeration will "postpone" the coming defrost
Schedule:
Here defrost can be started at fixed times during
the day and night. However, max. 6 times
Contact:
Defrost is started with a contact signal on a digital
input
Network:
The signal for defrost is received from a system unit
via the data communication
S5 temp
In 1:1 systems the efficiency of the evaporator can
be monitored. Icing-up will start a defrost.
Manual:
An extra defrost can be activated from the control-
ler's lower-most button
All the mentioned methods can be used at random – if just one of
them is activated a defrost will be started.
4
Manual RS8EE202 © Danfoss 08-2010
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EKC 202D
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Do you have a question about the EKC 202D and is the answer not in the manual?
Questions and answers
Is there a possibility with the EKC 202D2 to correct the temperature sensor reading offset,
Yes, the Danfoss EKC 202D can correct the temperature sensor reading offset. This is done using the parameters r09 and r10, which allow for the correction of the signal from sensors S4 and S3, respectively. Both parameters have a correction range of -10.0 K to 10.0 K.
This answer is automatically generated