Table 5: Appliance cleaning function
Appliance shutdown
The function closes the AKV valve and all outputs are switched o. The cooling appliance is stopped like the “Main
switch”, but this happens without an “A45 standby alarm”. The function can be enabled by a switch on the DI input
or via a setting through data communication.
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
Hot gas: Here the solenoid valves are controlled so that the hot gas can ow through the evaporator.
In application modes where a compressor output is dened, a simple hot gas can be dened where the compressor
is running during defrost.
Hot gas defrost (only for application 5)
This application can be used on systems with hot gas defrost, but only in small systems, e.g. supermarkets – the
functional content has not been adapted to industrial systems with large charges.
Relay 2 is used for the suction valve
Relay 3 is used for the drain valve
Relay 4 is used for the hot gas valve
It is not possible to start a manual hot gas defrost via the display or the app.
Figure 9: Hot gas application
Start of defrost
A defrost can be started in dierent ways:
Interval:
Defrost is started at xed time intervals like e.g. every eighth hour. An interval must ALWAYS be set to a "higher"
value than the period set between two defrostings when a schedule or network signal is used.
Week schedule:
Here defrost can be started at xed times of the day and night. However, max. 6 defrosts per day.
Contact:
Defrost is started with a contact signal on a digital input.
AK-CC55 Single Coil and Single Coil UI
© Danfoss | Climate Solutions | 2021.02 BC364229688105en-000101 | 12
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