Danfoss ADAP-KOOL AK-CT 200A User Manual page 22

Interval between defrost starts
The function is zeroset and will start the timer function 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 safeguard 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 communication does not take place, the interval time will be
used as max. time between defrosts.
When there is defrost with clock function or data communication, the interval time
must be set for a somewhat longer period of time than the planned one, as the
interval time will otherwise start a defrost which a little later will be followed by
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.
The interval time is not active when set to 0.
Max. defrost duration
This setting is a safety time so that the defrost will be stopped if there has not already
been a stop based on temperature or via coordinated defrost.
(The setting is the defrost time if d10 is set to 0.)
Time staggering for defrost cutins during start-up
The function is only relevant if you have several refrigeration appliances or groups
where you want the defrost to be staggered in relation to one another. The function is
furthermore only relevant if you have chosen defrost with interval start (d03).
The function delays the interval time d03 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 power failure.
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).
Delay of fan start after defrost
Here you set the time that is to elapse from compressor start after a defrost and until
the fan may start again. (The time when water is "tied" to the evaporator).
Fan start temperature
The fan may also be started a little earlier than mentioned under "Delay of fan start
after defrost", if the defrost sensor S5 registers a lower value than the one set here.
Fan cut in during defrost
Here you can set whether fan is to operate during defrost.
0: Stopped (Runs during pump down)
1: Running (stopped during "fan delay")
2: Running during pump down and defrost. After that stopped
Defrost sensor
Here you define the defrost sensor.
0: None, defrost is based on time
1: S5
2: S4
3: S5+S5B (In application 3, there is an individual defrost stop at S5 and S5B. In the
other applications, the defrost cycle is stopped when both sensors register the
stop temperature.)
Pumpdown delay
Set the time where the evaporator is emptied of refrigerant prior to the defrost.
Drain delay (only in connection with hotgas)
Set the time where the evaporator is emptied of condensed refrigerant after
the defrost.
Defrost on demand – aggregate refrigeration time
Set here is the refrigeration time allowed without defrosts. If the time is passed,
a defrost will be started.
With setting = 0 the function is cut out.
Delay on stop of heating in the drip tray
The time applies from the time the defrost stops by time or temperature to the time
the heating element in the drip tray needs to be disconnected.
Postpone alarm info for timed stop
The defrost stop by temperature has failed. It has stopped by time, which will result
in an alarm notification. Wait to send an alarm until x consecutive alarms have
registered subsequent "timed stop alarms". The counter is reset after each correct
stop by temperature.
22 User Guide RS8GR602 © Danfoss 2016-10
d03 Def Interval
(0=off )
d04 Max Def. time
d05 Time Stagg.
d06 DripOff time
d07 FanStartDel
d08 FanStartTemp
d09 FanDuringDef
d10 DefStopSens.
d16 Pump dwn del.
d17 Drain del
d18 MaxTherRunT
d20 Drip Tray del
d26 NumMaxDefAl.
AK-CT 450A