User Guide | Optyma™ control AK-RC 111 single phase
© Danfoss | DCS (vt) | 2020.03 BC309238530328en-000101 | 11
In1 INP-1 input setting  
8 = Night mode digital input 
(energy saving, N.O.)
 7 = Stop defrosting remotely (N.O.) 
(reads rising edge of impulse) 
 6 = Start defrosting remotely (N.O.) 
(reads rising edge of impulse) 
 5 = Stand-by remotely (N.O.) (In 
order to indicate Stand-By 
mode, the display shows ‘In5’ 
alternating with the current 
view) 
 4 = Pump-down pressure switch 
(N.O.)
 3 = Man-in-room alarm (N.O.)
 2 = Compressor protection (N.O.)
 1 = Door switch (N.O.)
 0 = disabled
-1 = Door switch (N.C.)
-2 = Compressor protection (N.C.)
-3 = Man-in-room alarm (N.C.)
-4 = Pump-down pressure switch 
(N.C.)
-5 = Stand-by remotely (N.C.) (In 
order to indicate Stand-By 
mode, the display shows ‘In5’ 
alternating with the current 
view) 
-6 = Start defrosting remotely (N.C.) 
(reads falling edge of impulse)
-7 = Stop defrosting remotely (N.C.) 
(reads falling edge of impulse)
-8 = Night mode digital input 
(energy saving, N.C.)
2
In2 INP-2 input setting (like In1) 1
bEE Buzzer enable 0 = disabled
1 = enabled
1
mOd Thermostat functioning mode 0 = Cold function
1 = Hot function
(in this mode defrosting and fan 
disable Fst are excluded)
0
P1 Password type of protection
(active when PA is not equal 0)
0 = only display set point
1 = display set point, AUX,  
light access
2 = access in programming  
not permitted
3 = access in second level 
programming not permitted
3
PA Password
(see P1 for the type of protection)
0...999
0 = not active
0
reL Release software indicates software version 2
(read only)
4.11  Switching on the AK-RC 
111 electronic controller
4.12  Cold/hot activation/
deactivation conditions
4.13  Manual defrosting 
activation/deactivation
After wiring the electronic controller correctly, power up at 230 V AC; the display panel will 
immediately emit a beep and all the LEDs will come on simultaneously for a few seconds.
In cold mode (mOd=0), the AK-RC 111 controller activates the compressor when cold room 
temperature exceeds setting + differential (r0); it deactivates the compressor when cold room 
temperature is lower than the setting.
If Pump-Down function is selected (parameter AU1/AU2 = 4/-4), see chapter 4.16 for compressor 
activation/deactivation conditions.
In hot mode (mOd=1), the AK-RC 111 controller activates the heat output (COMPR output) when cold 
room temperature drops below setting-differential (r0); it deactivates the heat output (COMPR output) 
when cold room temperature is higher than the setting.
To defrost just press the dedicated key (see section 5.2) to activate the elements relay. Defrosting will 
not take place if the end-of-defrost temperature setting (d2) is lower than the temperature detected 
by the evaporator sensor. Defrosting ends when the end-of-defrost temperature (d2) or maximum 
defrost time (d3) is reached, or due to forced manual defrost termination (end of defrost button or 
digital input).