Forced Closing; Door Contact; Display - Danfoss AK-CC55 Multi Coil User Manual

AK-CC55 Multi Coil
Function
Defrost start
Main switch
Night setback
Thermostat band
Alarm at closed
Alarm at open
Case cleaning
Forced cooling
Open blinds
Coordinated defrost

Forced closing

Shutdown
Light control
Leak detection
Adaptive liquid control
Door fan stop
Example: If DI1 is to be used to start a defrost, o02 must be set to 4.
Forced closing
The AKV valves can be closed with an external signal ("Forced closing").
The function must be used in connection with the compressor's safety circuit, so that there will be no injection of
liquid into the evaporator when the compressor is stopped by the safety controls and cannot start again (however
not at low pressure – LP).
Via a setting (see o90 Fan at forced closing) it is possible to define whether the fan should be ON or OFF during
forced closing and whether an ongoing defrost is suppressed (i.e. put in standby position for a period of up 10
minutes before it is cancelled) - this feature can be used in CO
compressors cannot run.
The signal can be received from the DI-input or via the data communication.

Door contact

The door contact function can via the digital inputs be defined for two different 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 injection, 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 for a longer time than the set alarm
delay, an alarm is triggered and the fans will start running again.

Display

The controller has one or two plugs for an external display.
One of the following display types can be connected to a plug:
© Danfoss | Climate Solutions | 2022.08
Input / Settings menu
DI1 DI2
o02 o37
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systems to eliminate excessive heating while
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BC365022028193en-000201 | 20
DI3 Setting
o84
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9
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13
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+ 20
+ 21
+ 29