Danfoss EKC 315A Instructions page 7

Define input signal on the analoge input AIA:
0: no signal,
1: Temperature setpoint. 0-20 mA
2: Temperature setpoint. 4-20 mA
3: Displacement of superheat reference. 0-20 mA
4: Displacement of superheat reference. 4-20 mA
Set supply voltage frequency
Select display for "normal picture"
(Display the item indicated in parenthesis by
briefly pressing the bottom button)
1: Superheat (Temperature)
2: Valve's opening degree (Superheat)
3: Air temperature (Temperature reference)
Manual control of outputs:
OFF: no manual control
1: Relay for solenoid valve: select ON
2: AKV/A output: select ON
3: Alarm relay activated (cut out)
Working range for pressure transmitter – min.
value
Working range for pressure transmitter – max.
value
(Setting for the function o09, only AKV and TQ)
Set the temperature value or opening degree
where the output signal must be minimum (0 or
4 mA)
(Setting for the function o09, only AKV and TQ)
Set the temperature value or opening degree
where the output signal must be maximum (20
mA)
Refrigerant setting
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. 30=R417A. 31=R422A.
32=R413A. 33=R422D. 34=R427A. 35=R438A
Service
TQ valve's actuator temperature
Reference of the valve's actuator temperature
Analog input AIA (18-19)
Analog output AO (2-5)
Read status of input DI
Thermostat cut-in time
Temperature at S2 sensor
Superheat
Superheat reference
Read AKV valve's opening degree
Read evaporating pressure
Read evaporating temperature
Temperature at S3 sensor
Temperature reference
Read signal at pressure transmitter input
*) This setting will only be possible if a data communication module has been
installed in the controller.
The controller can give the following messages:
E1 Fault in controller
E11 Valve's actuator temperature outside its range
E15 Cut-out S2 sensor
E16 Shortcircuited S2 sensor
Error message
E17 Cut-out S3 sensor
E18 Shortcircuited S3 sensor
The input signal on terminals 18-19 is outside
E19
the range.
The input signal on terminals 14-15 is outside
E20
the range (P0 signal)
A1 High-temperature alarm
Alarm message
A2 Low-temperature alarm
A11 No refrigerant has been selected
EKC 315A
o10 0 4 0
o12 50 Hz 60 Hz 0
o17 1 3 1
o18 off 3 Off
o20 -1 bar 60 bar -1.0
o21 -1 bar 60 bar 12
o27 -70°C 160°C -35
o28 -70°C 160°C 15
o30 0 35 0
u04
u05
u06
u08
u10 on/off
u18 min.
u20
u21
u22
u24
u25
u26
u27
u28
u29
Instructions RI8GT752 © Danfoss 02/2010
Start of controller
When the electric wires have been connected to the controller,
the following points have to be attended to before the regulation
starts:
1. Switch off the external ON/OFF switch that starts and stops the
regulation.
2. Follow the menu survey and set the various parameters to the
required values.
3. Switch on the external switch, and regulation will start.
4. Follow the actual room temperature or superheat on the
display.
(On terminals 2 and 5 a current signal can be transmitted
which represents the display view. Connect a data collection
unit, if applicable, so that the temperature performance can be
followed).
If the superheating fluctuates
When the refrigerating system has been made to work steadily,
the controller's factory-set control parameters should in most
cases provide a stable and relatively fast regulating system.
If the system however fluctuates this may be due to the fact that
too low superheat parameters have been selected:
If adaptive superheat has been selected:
Adjust: n09, n10 and n18.
If load-defined superheat has been selected:
Adjust: n09, n10 and n22.
°C
Alternatively it may be due to the fact that the set regulation
°C
parameters are not optimal.
mA
mA
If the time of oscillation is longer than the integration time:
(T > T , (T is, say, 240 seconds))
p n n
1. Increase T to 1.2 times T
n
2. Wait until the system is in balance again
°C
3. If there is still oscillation, reduce K
K
4. Wait until the system is in balance
K
5. If it continues to oscillate, repeat 3 and 4
%
If the time of oscillation is shorter than the integration time:
bar
(T < T , (T is, say, 240 seconds))
°C
p n n
1. Reduce K by, say, 20% of the scale reading
°C
p
2. Wait until the system is in balance
°C
3. If it continues to oscillate, repeat 1 and 2.
mA
If the superheat has excessive underswing
during start-up
If you regulate with valve type AKV:
Adjust n22 a little bit up and/or n04 a little bit down.
If you regulate with valve type TQ:
Adjust n26 a littlle bit down
p
by, say, 20%
p
7