Danfoss AK-CC 550B User Manual page 16

Melt function
Only for control of refrigeration (-5 to +10°C). The function ensures that the evapora-
tor will not be blocked by frost. Here you set how often the function is to stop the
refrigeration and hence transform the frost to water (or ice if there is too much frost).
Melt period
Here you set how long an on-going melt function is to last.
Set point 2
The thermostat's cutout value when the thermostat band 2 is activated via a digital
input.
Correction of signal from S6
Compensation possibility due to long sensor cable
Selection of thermostat sensor S4% during night operation with night blinds
Here you define the sensor the thermostat is to use for its control function. S3, S4, or a
combination of them. With the setting 0%, only S3 is used (Sin). With 100%, only S4.
Heat function
Set the size of the Neutral Zone for changeover from cooling to heating
Time delay on transition from refrigeration phase to heating phase.
(there is not time delay on transition from heating phase to refrigeration phase).
Alarm
The controller can give alarm in different situations. When there is an alarm all the
light-emitting diodes (LED) will flash on the controller front panel, and the alarm relay
will cut in.
Alarm delay (short alarm delay on air temperature)
If the upper or the lower alarm limit values are exceeded, a timer function will com-
mence. The alarm will not become active until the set time delay has been passed.
The time delay is set in minutes.
Time delay for door alarm
The time delay is set in minutes.
The function is defined in o02 , o37 or in o84.
Time delay for cooling (long alarm delay)
This time delay is used during start-up, during defrost, immediately after a defrost.
There will be change-over to the normal time delay (A03) when the temperature has
dropped below the set upper alarm limit.
The time delay is set in minutes.
Upper alarm limit
Here you set when the alarm for high temperature is to start. The limit value is set in
°C (absolute value).
The limit value will be raised during night operation. The value is the same as the one
set for night setback, but will only be raised if the value is positive.
In application 9 and 10 the setting is common for both S3 and S3B.
Lower alarm limit
Here you set when the alarm for low temperature is to start. The limit value is set in °C
(absolute value).
In application 9 and 10 the setting is common for both S3 and S3B.
Upper alarm limit for thermostat 2 (Thermostat band 2)
(Same function as for thermostat 1)
Lower alarm limit for thermostat 2 (Thermostat band 2)
(Same function as for thermostat 1)
Upper alarm limit for S6 temperature at thermostat 1
Lower alarm limit for S6 temperature at thermostat 1
Upper alarm limit for S6 temperature at thermostat 2 (Thermostat band 2)
Lower alarm limit for S6 temperature at thermostat 2 (Thermostat band 2)
S6 temperature alarm delay
The alarm is activated if one of the relevant alarm limits A22, A23, A24 or A25 is
exceeded. The time delay is set in minutes.
(Alarms will not activate when the setting is set to the maximum value.)
Delay of a DI1 alarm
A cut-out/cut-in input will result in alarm when the time delay has been passed. The
function is defined in o02.
16 Manual RS8GL302 © Danfoss 2016-03
r16 MeltInterval
r17 Melt period
r21 Cutout2 temp
r59 Adjust S6
r61 Ther.S4% Ngt
r62 Heat NZ
r63 HeatStartDel
Night setbck
(start of nightsignal. 0=Day, 1=Night)
Forced cool.
(start of forced cooling)
Forced close
(Forced stop of cooling)
Alarm settings
With data communication the impor-
tance of the individual alarms can be
defined. Setting is carried out in the
"Alarm destinations" menu via AKM.
A03 Alarm delay
A04 DoorOpen del
A12 Pulldown del
A13 HighLim Air
A14 LowLim Air
A20 HighLim2 Air
A21 LowLim2 Air
A22 HighLim1 S6
A23 LowLim1 S6
A24 HighLim2 S6
A25 LowLim2 S6
A26 Al. Delay S6
A27 AI.Delay DI1
AK-CC 550B