Fan Control; Railheat Control - Danfoss AK-CC55 User Manual

AK-CC55 Single Coil and Single Coil UI

Fan control

Table 36: Fan control
Function Description
Control state A Readout of the actual control state of the controller
Fan Actual status of output function
Fan ECO Actual status of output function
Fan pulsing mode Pulse operation of fan 0: No pulse operation 1: Pulse
operation when the thermostat is cut out2: Pulse op-
eration when the thermostat is cut out, but only dur-
ing night operation
Fan period time Period time for pulsing of fan
Fan ON cycle ON time for fan. The ON period is set as a percentage
of the period time
Fan stop high S5 Fan stop temperature The function stops the fans in
temp. an error situation, so that they will not provide power
to the appliance. If the defrost sensor registers a high-
er temperature than the one set here, the fans will be
stopped. There will be re-start at 2 K below the set-
ting. The function is not active during a defrost or
start-up after a defrost.
Fan at forced closing You can set whether fans should be operational or
stopped if the function "Forced closing" is activated
here. 0: Fans are OFF1: Fans are ON2: Fans are OFF and
defrost is not permitted3: Fans are ON and defrost is
not permitted
Fan stop at blinds When blinds are closing the fans are stopped in the
closing defined time delay in order to ensure that the blinds
are closed correctly

Railheat control

Table 37: Railheat control
Function Description
Control state A Readout of the actual control state of the controller
Dewpoint Actual dewpoint received from system manager via
network
Rail heat Actual status of output function
Rail heat power Readout of the actual rail power in %
Rail heat PWM Actual status of output function
Rail heat control The rail heat can be controlled in several ways: 0: Rail
mode heat is running all the time 1: Pulse control is used
with a timer function following the day/night opera-
tion 2: Pulse control is used with a dewpoint function.
This function requires that a signal is received about
the dewpoint value. The value is measured by a sys-
tem manager and sent to the controller via the data
communication.
Rail heat ON cycle Rail heat power during day time. The ON period is set
day as a percentage of the period
Rail heat ON cycle Rail heat power during night time. The ON period is
night set as a percentage of the period time
Rail heat period time Period time for pulsing of rail heat
© Danfoss | Climate Solutions | 2021.02
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,
13=Not_used, 14=Defrost, 15=Fan delay, 17=Door
open, 18=Melt period, 19=Modulating temp. control,
20=Emergency control, 23=Adaptive superheat con-
trol, 24=Start injection, 25=Manual control, 26=No re-
frigerant selected, 16=Forced closing, 29=Case clean-
ing, 30=Forced cooling, 31=Door open, 32=Power-up
delay, 33=Air heating, 45=Shut down controller,
48=Adaptive liquid control
0=OFF, 1=ON
0=OFF, 1=ON
0=No pulsing, 1=Pulsing cut-out, 2=Pulsing cut-out
night
0=OFF, 1=ON, 2=OFF and suppress defrost, 3=ON and
suppress defrost
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,
13=Not_used, 14=Defrost, 15=Fan delay, 17=Door
open, 18=Melt period, 19=Modulating temp. control,
20=Emergency control, 23=Adaptive superheat con-
trol, 24=Start injection, 25=Manual control, 26=No re-
frigerant selected, 16=Forced closing, 29=Case clean-
ing, 30=Forced cooling, 31=Door open, 32=Power-up
delay, 33=Air heating, 45=Shut down controller,
48=Adaptive liquid control
0=OFF, 1=ON
0=ON, 1=Day/Night timer, 2=Dewpoint ctrl.
Code Short name
u00 u00 Ctrl. state
u59 u59 Fan relay
U37 U37 Fan Eco
F05 F05 FanPulseMode
F06 F06 Fan cycle
F07 F07 Fan ON %
F04 F04 FanStop temp
o90 o90 Fan ForcedCl
P65 P65 BlindFanStop
Code Short name
u00 u00 Ctrl. state
x18 --- Dew point
u61 u61 Railh. relay
u85 u85 Rail DutyC %
U59 U59 Railheat PWM
o85 o85 Railh. mode
o41 o41 Railh.ONday%
o42 o42 Railh.ONngt%
o43 o43 Railh.cycle
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