Danfoss EKC 368 Media Temperature Controller Instructions
EKC 368
Sair, Sdef:
Pt 1000 ohm /0°C
(AKS 11)
Connections
Necessary connections
Terminals:
25-26 Supply voltage 24 V a.c.
18-19 Pt 1000 sensor at evaporator outlet
21-24 Supply to step motor
1-2 Switch function for start/stop of regulation. If a switch is not connected, terminals 1 and 2 must be shortcircuited.
5-6 Battery (the voltage will open the KVS valve if the controller loses its supply voltage)
Application dependent connections
Terminal:
12-13 Alarm relay
There is connection between 12 and 13 in alarm situations and when the controller is dead
8-9 Relay switch for start/stop of defrost
8-10 Relay switch for start/stop of fan
8-11 Relay switch for start/stop of cooling
16-17 Voltage signal from other regulation (Ext.Ref.)
If the voltage signal is received from a PLC or the like, a data com munication module, if any, must be with galvanic separation.
18-20 Pt 1000 sensor for defrost function.
Short-circuit of the terminals for two seconds (pulse signal) will start a defrost
3-4 Data communication
Mount only, if a data communication module has been mounted.
It is important that the installation of the data communication cable be done correctly.
Cf. separate literature No. RC8AC..
Operation
Display
The values will be shown with three digits, and with a setting you can determine whether the temperature are to be shown in °C or in °F.
Light-emitting diodes (LED) on front panel
There are LED’s on the front panel which will light up when the belonging relay is activated.
The three lowermost LED’s will flash, if there is an error in the regulation.
In this situation you can upload the error code on the display and cancel the alarm by giving the uppermost button a brief push.
The buttons
When you want to change a setting, the two buttons will give you a higher or lower value depending on the button you are pushing.
But before you change the value, you must have access to the menu. You obtain this by pushing the upper button for a couple of seconds – you will then enter the column with parameter codes.
Find the parameter code you want to change and push the two buttons simultaneously. When you have changed the value, save the new value by once more pushing the two buttons simultaneously.
Examples of operations
Set reference temperature
- Push the two buttons simultaneously
- Push one of the buttons and select the new value
- Push both buttons again to conclude the setting
Set one of the other menus
- Push the upper button until a parameter is shown
- Push one of the buttons and find the parameter you want to change
- Push both buttons simultaneously until the parameter value is shown
- Push one of the buttons and select the new value
- Push both buttons again to conclude the setting
*) This setting will only be possible if a data communication module has been installed in the controller.
Factory setting
If you need to return to the factory-set values, it can be done in this way:
- Cut out the supply voltage to the controller
- Keep both buttons depressed at the same time as you reconnect the supply voltage
© Danfoss | Climate Solutions | 2021.03
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