Override - Danfoss AK-CC55 Multi Coil User Manual

AK-CC55 Multi Coil
• 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.
If there are two external displays, it will be the sum of the two distances that cannot exceed 100 m.
Figure 24: Controller with two displays

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 6: 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 Max. Te offset Requested offset to actual evaporating temperature in order to keep the air temperature at the actual setpoint
MC Liquid control Master control signal allowing switch to adaptive liquid control
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 closing Master control signal that will close the injection valve
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
MC Defrost state Read out the actual state of the defrost
Master control signal used for co-ordinated defrost control to hold cabinets from returning to normal refrigeration after a defrost
MC Hold after defrost
until all cabinets have terminated defrost.
MC Stop defrost Master control signal used to prevent a defrost start in a controller.
MC Light signal Master control signal for control of light via a data communication signal from the system manager.
MC Actual dewpoint Master control signal sending the actual measured dewpoint from the system manager to the controller over the network.
Master control signal that will lock down all Bluetooth data communication and optionally also lock the display keyboard (parame-
MC Key/Bluetooth lock
ter P89)
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