Danfoss AK-CC55 Compact User Manual page 50

AK-CC55 Compact
Function Description
Defrost A Actual status of output function
Defrost time A Read the duration of the ongoing defrost or the dura-
tion of the last completed defrost.
Start defrost Command for starting a defrost
Stop defrost Command for stopping an ongoing defrost cycle
Defrost method Select method of defrost
Defrost stop meth- Here you define whether a defrost cycle is to be stop-
od ped by time or by a temperature sensor
Defrost stop limit 1 When the selected defrost stop sensor reaches the set
limit, the defrost cycle is terminated
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
Min. defrost time Minimum duration of a defrost cycle. The defrost cy-
cle will as a minimum run for the set minimum defrost
time once it is started
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.
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.
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
Time staggering Time staggering for defrost cutins during start-up The
power up function is only relevant if you have several refrigera-
tion appliances or groups where you want the defrost
to be staggered in relation to one another. The func-
tion is furthermore only relevant if you have chosen
defrost with interval start. The function delays the in-
terval time by the set number of minutes, but it only
does it once, and this at the very first defrost taking
place when voltage is connected to the controller.
The function will be active after each and every pow-
er failure.
Max thermostat run- Defrost on demand – aggregate refrigeration time Set
time here is the refrigeration time allowed without de-
frosts. If the time is passed, a defrost will be started.
With setting = 0 the function is not in use.
Pump down delay Set the time where the evaporator is emptied of re-
frigerant prior to the actual defrost cycle
Drip off time Here you set the time that is to elapse from a defrost
and until the compressor is to start again. (The time
when water drips off the evaporator).
Max hold time Max. standby time after coordinated defrost. When a
controller has completed a defrost it will wait for a
signal which tells that the refrigeration may be re-
sumed. If this signal fails to appear for one reason or
another, the controller will itself start the refrigeration
when this standby time has elapsed.
© Danfoss | Climate Solutions | 2022.08
Values
0=OFF, 1=ON
0=OFF, 1=ON
0=OFF, 1=ON
0=None, 1=Electrical, 2=Hot gas, 3=Brine, 4=Air/
Offcycle
0=Time, 1=S5 sensor, 2=S4 sensor
Code Short name
u60 u60 Def. relay
u11 u11 Defrost time
x09 --- Def. Start
x10 --- Def. Stop
d01 d01 Def. method
d10 d10 DefStopSens.
d02 d02 Def.StopTemp
d28 d28 DefStopTemp2
d24 d24 Min Def Time
d04 d04 Max Def.time
d29 d29 MaxDefTime2
d03 d03 Def.Interval
d05 d05 Time stagg.
d18 d18 MaxTherRunT.
d16 d16 Pump dwn del
d06 d06 DripOff time
o16 o16 MaxHoldTime
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