AK-CT 450A User Guide RS8GR602 © Danfoss 2016-10 23
Rail heat during defrost cycle
Here you can set how the rail heat is to be regulated during a defrost cycle.
0: No rail heat
1: No change; continues as during regulation.
2: 100% on
d27 Railh. at def
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.)
Defrost temp.
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
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
MC def. start
The system unit can start/prevent
a defrost cycle
Fan Fan control
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 S5 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 (=max. value) the function is interrupted.
F04 FanStopTemp.
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
F05 FanPulseMode
Pulse operation period for fan
Here the overall pulse time is set. The sum of ON-to and OFF time.
F06 Fan cycle
ON time for fan
Here the % part of the period the fans are to be in operation is set.
F07 Fan ON %
Max. S4 temperature during defrost
Here the maximum S4 temperature during a defrost cycle can be set. If the value
is exceeded, the fans will be stopped. The function is not active when the thempera-
ture is set to max value (15°C).
F22 FanStopS4Def
u59 Fan Relay
Here you can read the fan relay status,
or force-control the relay in “Manual
control” mode.
Parameter for cooling function
Period time for the pulse width period (PWM)
Expert setting - The value should only be changed by specially trained sta.
n63 Pwm Period
Max. opening degree at PWM n64 Pwm Max. OD
Min. opening degree at PWM n65 Pwm Min. OD
Wind up factor at PWM
Expert setting - The value should only be changed by specially trained sta.
n66 PwmWindUpFac
Amplication factor at PWM
Expert setting - The value should only be changed by specially trained sta.
n67 Pwm Kp fact.
Integration time at PWM
Expert setting - The value should only be changed by specially trained sta.
n68 Pwm Tn sec
Forced cool.
(start of forced cooling)
Forced close
(forced stop of cooling)
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