Refrigerant
Forced closing
Sensor correction
Display signal
18
Before regulation can be commenced, the refrigerant must be defined.
You may select one of the following refrigerants:
1
R12
2
R22
3
R134a
4
R502
5
R717 (ammonia)
6
R13
7
R13b1
8
R23
The refrigerant is selected by keying a figure between 1 and 23. If you push 0, no refrigerant
has been selected.
The refrigerant setting can only be changed, if the function switch is in pos. "control stopped"
(i.e. main switch in pos. 0).
Warning: Incorrect selction of refrigerant can cause damage to the compressor.
Main function
The AKV valves can be closed with an external signal (the "ON" input is cut-out).
The function must be used in connection with the compressor's safety circuit, so that there will
be no injection of liquid into the evaporator when the compressor is stopped by the safety
controls.
If a defrost cycle is in progress, the forced closing status will not be re-established until the
defrost is completed.
The signal can also be received from the gateway's override function. When the signal is
received, the valve is force-closed.
The "ON" input is defined, as follows:
0: Terminals 32-33 are not used, as the regulation is controlled by the gateway's override signal.
1: Connection must be established (when the voltage is cut out, the valve will close).
The input signal from all connected sensors can be corrected. A correction will only be necessary
if the sensor cable is long and has a small cross-sectional area. All displays and functions will reflect
the corrected value.
The air temperature measured at the evaporator can be read on a display. It must be an LCD
display type AKA 14. The display is normally fitted to the appliance, so that the customer can
see the air temperature. A display can be mounted in each section.
The temperature display can be selected independently of the selected thermostat function.
If setting 0 is selected, the display will show three dashes "- - -".
If setting 3 is selected, S3 and S4 will be included with the weighting set under the thermostat
function (if no thermostat function has been selected, the displayed value will originate from
the defined sensor (S3 or S4)).
Settings:
0: Display function not active
1: S3 temperature displayed
2: S4 temperature displayed
3: Air temperature ("Ther.Air") is displayed, according to which the control is carried out.
Common Controller
Display Settings
Codes
The display can show you the following codes:
"dEF" : Appears during defrost, and 15 minutes after the end of the defrost.
"AL1" : Appears when there are errors in sensors attached to the display function.
"- - -" : Appears if the display function is not active.
Displacement of the displayed value
The values shown on the display can be offset-adjusted. The function is used where it is
required that the display is calibrated to show the measured air temperature surrounding the
refrigerated products.
The displacement is indicated in degrees with a decimal.
Function description RC.8A.R1.02 © Danfoss 10/2001
9
R500
10
R503
11
R114
12
R142b
13
User-defined
14
R32
15
R227
16
R401A
Rfg. type 1..23
Disp.Ctrl.
17
R507
18
R402A
19
R404A
20
R407C
21
R407A
22
R407B
23
R410A
___
Rfg. type
0/1/2/3
AKC 114G