Danfoss EKC 312 User Manual page 7

Manual
Survey of functions
Function
Refrigerant setting
Before refrigeration can be started, the refrigerant must be defined.
You can select the following refrigerants:
1=R12. 2=R22. 3=R134a. 4=R502. 5=R717. 6=R13. 7=R13b1.
8=R23. 9=R500. 10=R503. 11=R114. 12=R142b. 13=User defined.
14=R32. 15=R227. 16=R401A. 17=R507. 18=R402A. 19=R404A.
20=R407C. 21=R407A. 22=R407B. 23=R410A. 24=R170. 25=R290.
26=R600. 27=R600a. 28=R744. 29=R1270.
(Warning: Wrong selection of refrigerant may cause damage to the
compressor).
Service
A number of controller values can be printed for use in a service
situation.
Read status of input DI (start/stop input).
Read the temperature at the S2 sensor.
Read superheat.
Read the control's actual superheat reference.
Read the valve's opening degree.
Read evaporating pressure.
Read evaporating temperature.
Read the temperature at the S4 sensor.
Read value of current signal from pressure transmitter (AIB).
For Danfoss only
Start-up time for safety signal
If the controller does not obtain a reliable signal within this period
of time the con-troller will in other ways try to establish a stable
signal. (A too high value may result in a flooded eaporator).
The value should only be changed by specially trained staff.
Signal safety during start-up
The control function uses the value as start value for the valve's
opening degree at each thermostat cutin. By adaptive control the
controller continuously calculates a new value.
The value should only be changed by specially trained staff.
Operating status
The controller's operating status can be called forth by a brief (1s)
activation of the upper button. If a status code exists it will be
shown. (Status codes have lower priority than alarm codes. This
means that status codes cannot be seen if there is an active alarm
code. The status code have the following meaning:
S10: Refrigeration stopped by the internal or external start/ stop.
S26: No refrigerant selected.
© Danfoss A/S (DCS-IMCGPD/sw), 2015-03
Electronic superheat controller, type EKC 312
DKRCC.PS.R1.A3.02 / 520H9752
Parameter Parameter by operation via data communication
o30 Refrigerant
Service
u10 DI
u20 S2 temp.
u21 SH
u22 SH ref.
u24 OD%
u25 Evap. pres. Pe
u26 Evap.Press.Te
u27 S4 temp.
u29 AI B mA
-- DO1 Alarm
Read status of alarm relay
n15 StartUp time
n17 Start OD%
EKC State
(0 = regulation)
10
26
7