Danfoss AK-CC 550 Manual page 19

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.
Startup time for signal reliability
If the controller does not obtain a reliable S1 signal within this period of time it will
in other ways try to create a stable signal. (A too high value may result in a flooded
evaporator).
The value should only be changed by specially trained staff.
Average opening degree
The controller continuously registers the valve's opening degree and uses the value in
its regulation.
The value should only be changed by specially trained staff.
Signal reliability at startup
The regulation uses the value as start value for the valve's opening degree for each
thermostat cutin. In connection with adaptive control the controller continuously
calculates a new value.
The value should only be changed by specially trained staff.
Stability factor for regulation of superheat (Stability)
With a higher value the control function will allow a greater fluctuation of the super-
heat before the reference is changed.
The value should only be changed by specially trained staff. (Factory setting = 4.0)
Ampflication factor
Expert setting for injection function
The value should only be changed by specially trained staff.
Integration time
Expert setting for injection function
The value should only be changed by specially trained staff.
Choice of sensor for superheat function (can only be set if "r12" = 0)
1: Pressure transmitter type AKS 32R
2: Temperature sensor S1 (Pt1000 Ohm at 0°C)
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 dur-
ing 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.
Real time clock
When using data communication the clock is automatically adjusted by the system
unit. If the controller is without data communication, the clock will have a power
reserve of four hours.
Real-time clock
You can set up to six individual times for defrost starts for each 24-hour period. There
is also a date indication used for registration of temperature measurements.
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.
Clock: Hour setting
Clock: Minute setting
Clock: Date setting
Clock: Month setting
Clock: Year setting
AK-CC 550 Manual RS8EN502 © Danfoss 02-2010
n13 AKV Period
n15 StartUp time
n16 AKV Dim.
n17 Start OD %
n18 -
n23 MTR Kp factor
n24 MTR Tn sec
n57 Pe/S1 select
Fan control
F04 FanStopTemp.
F05 FanPulseMode
F06 Fan cycle
F07 Fan ON %
Fan Relay
Here you can read the fan relay status,
or force-control the relay in "Manual
control" mode.
(Times cannot be set via data com-
munication. Settings are only relevant
when there is no data communica-
tion).
t01-t06
t11-t16
t07
t08
t45
t46
t47
19