Danfoss AK-CC 550B User Manual page 19

If you wish to see the temperature at the defrost sensor, push the controller's lowermost
button. (May be changed to another function in o92.)
If you wish to start an extra defrost, push the controller's lowermost button for four
seconds.
You can stop an ongoing defrost in the same way
Parameter for cooling function
Max. value for the superheat reference
Min. value for the superheat reference
MOP temperature
If no MOP function is required, select pos. OFF
AKV valve's time period in seconds
Should only be set to a lower value if it is a decentralised plant and the suction
pressure fluctuates a lot and in line with the opening of the AKV valve.
Fan
Fan stop temperature
The function stops the fans in an error situation, so that they will not provide power to
the appliance. If the defrost sensor registers a higher temperature than the one set here,
the fans will be stopped. There will be re-start at 2 K below the setting.
The function is not active during a defrost or start-up after a defrost.
With setting +50°C the function is interrupted.
Pulse operation of fan
0: No pulse operation
1: Pulse operation when the thermostat does not call for refrigeration
2: Pulse operation when the thermostat does not call for refrigeration, but only during
night operation
Pulse operation period for fan
Here the overall pulse time is set. The sum of ON-to and OFF time.
ON time for fan
Here the % part of the period the fans are to be in operation is set.
The LED on the controller's front will indicate whether a defrost is going on.
Internal defrosting schedule/clock function
(Not used if an external defrosting schedule is used via data communication.)
Up to six individual times can be set for the defrost start throughout the day.
Defrost start, hour setting
Defrost start, minute setting (1 and 11 belong together, etc.)
When all t01 to t16 equal 0 the clock will not start defrosts.
Real-time clock::
Setting the clock is only necessary when there is no data communication.
In the event of a power failure of less than four hours, the clock function will be saved.
Clock: Hour setting
Clock: Minute setting
Clock: Date setting
Clock: Month setting
Clock: Year setting
AK-CC 550B Manual RS8GL302 © Danfoss 2016-03
Defrost temp.
Def Start
Here you can start a manual defrost
Hold After Def
Shows ON when the controller is
operating with coordinated defrost.
Disable def.
Defrost in progress can be stopped
Defrost State
Status on defrost
1= pump down / defrost
n09 Max SH
n10 Min SH
n11 MOP temp
(A value of 15 corresponds to OFF)
n13 AKV Period
Fan control
F04 FanStopTemp.
F05 FanPulseMode
F06 Fan cycle
F07 Fan ON %
u59 Fan Relay
Here you can read the fan relay status,
or force-control the relay in "Manual
control" mode.
t01-t06
t11-t16
t07
t08
t45
t46
t47
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