Danfoss AK-CC 450 User Manual page 17

User Guide | Controller for appliance control, AK-CC 450
S6 temperature alarm delay
The alarm is activated if one of the relevant alarm limits A22, A23, A24 or A25 is
exceeded. The time delay is set in minutes.
Alarms will not activate when the setting is set to the maximum value.
Delay of a DI1 alarm
A cut-out/cut-in input will result in alarm when the time delay has been passed. The func-
tion is defined in o02.
Delay of a DI2 alarm
A cut-out/cut-in input will result in alarm when the time delay has been passed. The func-
tion 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
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.
Time delay on S3B alarm during normal regulation
(Application 7 and 8 only)
Compressor
The compressor relay works in conjunction with the thermostat. When the thermostat calls
for refrigeration the compressor relay will 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.
Select sequential or cyclic mode between the 2 compressors
1= sequential
2= cyclic
Compressor 2 in thermostat band 2
0: compressor 2 not running
1: compressor 2 running on demand (Sequential operation)
Compressor on-time at sensor error
Compressor off-time at sensor error
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.
© Danfoss | ADAP-KOOL® | 2015.10
A26 Al. Delay S6
A27 AI.Delay DI1
A28 AI.Delay DI2
A36 Alarm S4%
A52 PullD del.S6
A53 Al.Del.S3 B
Reset alarm
Ctrl. Error (EKC error)
Compressor control
c01 Min. On time
c02 Min. Off time
c05 Step delay
c08 Step mode
c85 Cmp2 in Th2
c86 CmpOn T Err
c87 CmpOff Err
Comp Relay / Comp2 Relay
Here you can read the status of the
compressor relay.
Defrost control
RS8EU702 | 17