Danfoss AK-CC 550B User Manual page 17

Delay of a DI2 alarm
A cut-out/cut-in input will result in alarm when the time delay has been passed. The
function is defined in o37
Signal to the alarm thermostat
Here you have to define the ratio between the sensors which the alarm thermostat
has to use. S3, S4 or a combination of the two.
With setting 0% only S3 is used. With 100% only S4 is used
(Setting also applies to a possible B section.)
Time delay on S6 (product sensor) for pull-down (long alarm delay)
This time delay is used for start-up, during defrosting, immediately after a defrost and
after an appliance clean.
A change is carried out to standard time delay (A26) when the temperature has
reached below the set upper alarm limit.
The time delay is set in minutes.
Alarm delay (short alarm delay on S3B air temperature)
A timer function starts if the top or bottom alarm limit is exceeded. The alarm will first
becomes active when the set delay time has been exceeded.
The time delay is set in minutes.
Compressor
The compressor relay works in conjunction with the thermostat. When the thermostat
calls for refrigeration the compressor relay be operated.
Running times
To prevent irregular operation, values can be set for the time the compressor is to run
once it has been started. And for how long it at least has to be stopped.
The running times are not observed when defrosts start.
Min. ON-time (in minutes)
Min. OFF-time (in minutes)
Time delay for couplings of two compressors
Settings indicate the time that has to elapse from the first relay cuts in and until the next
relay has to cut in.
The LED on the controller's front will show whether refrigeration is in progress.
Defrost
The controller contains a timer function that is zeroset after each defrost start.
The timer function will start a defrost if/when the interval time is passed.
The timer function starts when voltage is connected to the controller, but it is displaced
the first time by the setting in d05.
If there is power failure the timer value will be saved and continue from here when the
power returns.
This timer function can be used as a simple way of starting defrosts, but it will always act
as safety defrost if one of the subsequent defrost starts is not received.
The controller also contains a real-time clock. By means of settings of this clock and
times for the required defrost times, defrost can be started at fixed times of the day.
Defrost start can also be accomplished via data communication, via contact signals or
manual start-up.
All starting methods will function in the controller. The different functions have to be set,
so that multiple defrosts are avoided..
Defrost can be accomplished with electricity, hotgas or brine.
The actual defrost will be stopped based on time or temperature with a signal from a
temperature sensor.
Defrost method
Here you set whether defrost is to be accomplished with electricity, gas, or (none).
During defrost the defrost relay will be cut in.
Defrost stop temperature
The defrost is stopped at a given temperature which is measured with a sensor (the sen-
sor is defined in d10).
The temperature value is set.
AK-CC 550B Manual RS8GL302 © Danfoss 2016-03
A28 AI.Delay DI2
A36 Alarm S4%
A52 PullD del.S6
A53 AI.Delay S3B
Reset alarm
Ctrl. Error (EKC error)
Compressor control
c01 Min. On time
c02 Min. Off time
c05 Step delay
u58 comp7/LLSV
Here you can read the status of the
compressor relay.
Defrost control
d01 Def. method
0 = Off
1 = El
2 = Gas
d02 Def. Stop Temp
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