Thermostat Control - Danfoss AK-CC55 Water Loop User Manual

AK-CC55 Water Loop

Thermostat control

Table 21: Thermostat control
Function Description
Control state A Readout of the actual control state of the controller
Thermostat air Thermostat temperature
temp. A
Food temperature A Readout of food temperature
S3 Air ON evap. A Actual sensor value
S4 Air OFF evap. A Actual sensor value
Night condition Status of the day/night operation (night operation:
on/off)
Thermostat cut-in Readout of the actual cut-in value for the thermostat
temp.
Thermostat cut-out Readout of the actual cut-out value for the thermo-
temp. stat
Thermostat run time Read the ongoing cut-in time for the thermostat or
A the duration of the last completed cut-in
Thermostat band Readout of which thermostat is used for regula-
tion:1= Thermostat band 12= Thermostat band 2
Air heater Actual status of output function
Thermostat mode Here it is defined how the thermostat is operating.
For application mode 1-4 the thermostat mode will
be ON/OFF.
For application modes 5-6 the thermostat mode will
be Modulating due to speed control of compressor/
pump.
Cut-out 1 Setpoint. The thermostat's cut-out value when the
given thermostat band is in use
Differential 1 When the temperature is higher than the set cut-out
+ the set differential, the compressor relay will be cut-
in. It will cut-out again when the temperature comes
down to the set cut-out limit
Cut-out 2 Setpoint. The thermostat's cut-out value when the
given thermostat band is in use
Differential 2 When the temperature is higher than the set cut-out
+ the set differential, the compressor relay will be cut-
in. It will cut-out again when the temperature comes
down to the set cut-out limit
Max cut-out limit Setpoint limitation - The controller's setting range for
the thermostat setpoint may be narrowed down, so
that too high or too low values are not set accidental-
ly - with resulting damages.To avoid a too high set-
ting of the setpoint, the max. allowable reference val-
ue may be lowered
Min cut-out limit Setpoint limitation - The controller's setting range for
the thermostat setpoint may be narrowed down, so
that too high or too low values are not set accidental-
ly - with resulting damages.To avoid a too low setting
of the setpoint, the min. allowable reference value
may be increased
Thermostat sensor Selection of thermostat sensor. Here you define the
S4 % sensor that the thermostat is to use for its control
function. S3, S4, or a combination of them. With the
setting 0%, only S3 is used. With 100%, only S4.
Thermostat sensor Selection of thermostat sensor S4% during night op-
S4 % night eration with night blinds. Here you define the sensor
that the thermostat is to use for its control function.
S3, S4, or a combination of them. With the setting 0%,
only S3 is used. With 100%, only S4.
Night offset Night setback value.The thermostat's reference will be
the setpoint plus this value when the controller
changes over to night operation.
© Danfoss | Climate Solutions | 2022.04
Values
0=Normal ctrl., 1=Hold after defrost, 2=Min ON timer,
3=Min OFF timer, 4=Drip off, 10=Main switch OFF,
11=Thermostat cut-out, 12=Frost protection S4,
14=Defrost, 15=Fan delay, 17=Door open, 18=Melt
period, 19=Modulating temp. control, 20=Emergency
control, 25=Manual control, 29=Case cleaning,
30=Forced cooling, 32=Power-up delay, 33=Air heat-
ing, 34=Comp. safety cut-out, 45=Shut down control-
ler, 50=High S7 Brine inlet
0=OFF, 1=ON
1=Band 1, 2=Band 2
0=OFF, 1=ON
2=Modulating, 1=ON/OFF
Code Short name
u00 u00 Ctrl. state
u17 u17 Ther. air
U72 U72 Food temp.
u12 u12 S3 air temp.
u16 u16 S4 air temp.
u13 u13 Night Cond.
u90 u90 Cutin temp.
u91 u91 Cutout temp.
u18 u18 Ther runtime
u86 u86 Ther. band
u84 u84 Heat relay
r14 r14 Therm. mode
r00 r00 Cutout
r01 r01 Differential
r21 r21 Cutout 2
r93 r93 Diff Th2
r02 r02 Max cutout
r03 r03 Min cutout
r15 r15 Ther. S4 %
r61 r61 Ther.S4% Ngt
r13 r13 Night offset
BC378540472015en-000101 | 50