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Danfoss AK-CC55 Water Loop - Defrost Control

Danfoss AK-CC55 Water Loop
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Function
Description
Values
Code
Short name
Door restart inj. de-
lay
Start of refrigeration when the door is open. If the
door has been left open, refrigeration will be started
after the set time.
o89
o89 DoorInjStart
Alarm delay DI 1
Time delay for digital input alarm
A27
A27 Al.Delay DI1
Alarm delay DI 2
Time delay for digital input alarm
A28
A28 Al.Delay DI2
Defrost control
Table 23: Defrost control
Function
Description
Values
Code
Short name
Control state A
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 2=Min ON timer,
3=Min OFF timer, 4=Drip o, 10=Main switch OFF,
11=Thermostat cut-out, 12=Frost protection S4,
14=Defrost, 15=Fan delay, 17=Door open, 18=Melt
period, 19=Modulating temp. control, 20=Emergency
control, 25=Manual control, 29=Case cleaning,
30=Forced cooling, 32=Power-up delay, 33=Air heat-
ing, 34=Comp. safety cut-out, 45=Shut down control-
ler, 50=High S7 Brine inlet
u00
u00 Ctrl. state
Defrost sensor tem-
perature A
Actual temperature of selected defrost stop sensor
U73
U73 Def.StopTemp
S5 Evaporator A
Actual sensor value
u09
u09 S5 temp.
Defrost A
Actual status of output function
0=OFF, 1=ON
u60
u60 Def. relay
Defrost time A
Read the duration of the ongoing defrost or the dura-
tion of the last completed defrost.
u11
u11 Defrost time
Start defrost
Command for starting a defrost
0=OFF, 1=ON
x09
--- Def. Start
Stop defrost
Command for stopping an ongoing defrost cycle
0=OFF, 1=ON
x10
--- Def. Stop
Defrost method
Select method of defrost
0=None, 1=Electrical, 2=Hot gas, 4=Air/Ocycle
d01
d01 Def. method
Defrost stop meth-
od
Here you dene whether a defrost cycle is to be stop-
ped by time or by a temperature sensor
0=Time, 1=S5 sensor, 2=S4 sensor
d10
d10 DefStopSens.
Defrost stop limit 1
When the selected defrost stop sensor reaches the set
limit, the defrost cycle is terminated
d02
d02 Def.StopTemp
Defrost stop limit 2
Defrost stop temperature limit when thermostat band
2 is in operation.When the selected defrost stop sen-
sor reaches the set limit, the defrost cycle is termina-
ted
d28
d28 DefStopTemp2
Min. defrost time
Min. duration of a defrost cycle. The defrost cycle will
as a minimum run for the set minimum defrost time
once it is started
d24
d24 Min Def Time
Max. defrost time 1
Max. duration of a defrost cycle. The setting is also
used as a safety time if the defrost is stopped on tem-
perature. If the selected defrost stop sensor does not
reach the set defrost stop temperature limit within
the set time, the defrost will be stopped anyway.
d04
d04 Max Def.time
Max. defrost time 2
Max duration of a defrost cycle when thermostat
band 2 is in operation. The setting is also used as a
safety time if the defrost is stopped on temperature. If
the selected defrost stop sensor does not reach the
set defrost stop temperature limit within the set time,
the defrost will be stopped anyway.
d29
d29 MaxDefTime2
Defrost start interval
The function is zeroset and will start the timer func-
tion at each defrost start. When the time has expired
the function will start a defrost. The function is used
as a simple defrost start, or it may be used as a safe-
guard if the normal signal fails to appear. If master/
slave defrost without clock function or without data
communication is used, the interval time will be used
as max. time between defrosts. If a defrost start via
data communcation does not take place, the interval
time will be used as max. time between de-
frosts.When there is defrost with clock function or da-
ta communication, the interval time must be set for a
somewhat longer period of time than the planned
one. In connection with power failure the interval
time will be maintained, and when the power returns
the interval time will continue from the maintained
value. he interval time is not active when set to 0
d03
d03 Def.Interval
AK-CC55 Water Loop
© Danfoss | Climate Solutions | 2022.04 BC378540472015en-000101 | 52

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