Danfoss AK-CC55 Water Loop - Door Contact; Display; Override

Function
Input / Settings menu
Setting
DI1
DI2
o02
o37
Speed drive trip
+
+
25
Force cond. fan ON
+
+
26
Door fan stop
+
+
29
Example: If DI1 is to be used to start a defrost, o02 must be set to 4.
Door contact
The door contact function can via the digital inputs be dened for three dierent applications:
Alarm monitoring:
The controller monitors the door contact and delivers an alarm message if the door has been opened for a longer
period than the set alarm delay.
Alarm monitoring and stop of refrigeration:
When the door is opened, the refrigeration is stopped, i.e. the compressor and the fan are stopped and light
switches on. If the door remains open for a longer time than the set restart time, refrigeration will be resumed. This
will ensure that refrigeration is maintained even if the door is left open or if the door contact should be defective. If
the door remains open for a longer period than the set alarm delay, an alarm will also be triggered.
Alarm monitoring and stop of fans:
When the door is opened, only the fans are stopped. If the door remains open in longer time than the set alarm
delay, an alarm is triggered and the fans will start running again.
Display
The controller has one plug for an external display.
One of the following display types can be connected:
• AK-UI55 Info (temperature display).
• AK-UI55 Set (temperature display and operation).
• AK-UI55 Bluetooth (temperature display and app interface).
The connection between the display and the controller must be made using an AK-UI55 cable.
The distance between the controller and the display must not exceed 100 m.
Figure 38: Controller with one display
Danfoss 84B8235
Override
The controller contains a number of override functions which can be used together with Master Control functions in
the Danfoss gateway/system manager:
Table 3: Override functionality
Master control function
Description
MC Ther. toggle
Master control signal used for switching case load ON/OFF depending on the load condition
MC Load request
Master control signal used to control the load balance between multiple case controllers on the same suction line
MC Night setback
Master control signal for changing between day and night time operation
MC Case shutdown
Master control signal used to shut down a case for a time period. During shutdown there will be no alarm monitoring
MC Forced cooling
Master control signal that will provide forced cooling
MC Defrost start
Master control signal for starting a defrost. At adaptive defrost the defrost might be skipped if the defrost is not needed
AK-CC55 Water Loop
© Danfoss | Climate Solutions | 2022.04 BC378540472015en-000101 | 26