Defrosting Function; Start Of Defrost - Danfoss ADAP-KOOL AKC 114 G Mode D'emploi

Defrosting function

AKC 114G
It is possible to stop the fans during defrost.
Defrost Control Defrost Ctrl. Settings
If "Fan Run" is in pos. OFF, the fans will be stopped during defrost.
If "Fan Run" is in pos. ON, the fans will be operating during defrost.
When the fans are operating during defrost, the circulating air temperature is monitored
by the S4 sensor. If the sensor value exceeds the set "Fan Stop" temperature, the fans
will stop. They will start again, when the temperature is 2 K below the set temperature.

Start of defrost

Defrost can be started in four ways (which may all be selected simultaneously). When defrost
has been started, the defrost cycle will continue until a "Defrost Stop" signal is received.
1. Manual defrost
Manual defrost is started from control panel type AKA 21 or a PC. The setting will
automatically change back to OFF after two seconds.
Defrost Control
2. External signal
Defrost is started with a 230 V signal on terminals 30/31. The signal must be an impulse
signal of at least two seconds' duration.
A period of at least 60 minutes has to elapse from the end of a defrost period before a new
defrost with "external signal" can be started. (If defrost is required within the 60 minutes, a
defrost cycle can be started with one of the other defrost start signals).
If the external signal is still active 30 minutes after cooling is resumed, there will be an
alarm. The alarm ceases when the signal is removed.
A defrost will be started when a signal is received at the input.
3. Internal clock
Defrost is started by means of a weekly programme that is set in the controller. The times
have relation to the controller's clock function.
Three individual schedules with up to eight defrosts per schedule can be programmed.
Subsequently, the individual week days can be defined to follow one of the three
schedules.
Defrost Control Schedule 1 Def.Start Times
Schedule 2Def.Start Times
Schedule 3Def.Start Times
Extended Program Schedules Mon. Sched.
A defrost will be started when a signal is received from the defrost schedule.
Function description RC.8A.R1.02 © Danfoss 10/2001
Def. Ctrl.
Fan Run
Defrost Ctrl. Settings Man. Def.
No. Per Day ___
Def1 Sc1
Def2 Sc1
etc.
No. Per Day ___
Def1 Sc2
etc.
Tue. Sched.
etc.
OFF / ON
OFF / ON
OFF / ON
Def1 Sc1 Hour ___
Def1 Sc1 Min ___
Def2 Sc1 Hour ___
Def2 Sc1 Min ___
Def1 Sc2 Hour ___
etc.
1/2/3
___
1/2/3
___
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