6
Instructions RI8HA852 © Danfoss 04/2009
EKC 316A
ENGLISH
Menu survey
SW = 1.2x
Factory setting
If you need to return to the factory-set values, it can be done in this way:
- Cut out the supply voltage to the controller
- Keep both buttons depressed at the same time as you recon nect the supply voltage
Light-emitting diodes (LED) on front panel
There are LED’s on the front panel which will light up when the
belonging relay is activated.
The uppermost LED will indicate when the valve is moving
towards a greater opening degree.
The next LED will indicate when the valve is moving towards a
smaller opening degree.
The third one will indicate when the thermostat demands
refrigeration.
All light-emitting diodes will flash when there is an error in the
regulation.
In this situation you can upload the error code on the display and
cancel the alarm by giving the uppermost button a brief push.
Display
The values will be shown with three digits, and with a setting you
can determine whether the temperature are to be shown in °C or
in °F. (Pressure in bar or psig.)
Operation
The buttons
When you want to change a setting, the two buttons will give you
a higher or lower value depending on the button you are push-
ing. But before you change the value, you must have access to the
menu. You obtain this by pushing the upper button for a couple
of seconds - you will then enter the column with parameter codes.
Find the parameter code you want to change and push the two
buttons simultaneously. When you have changed the value, save
the new value by once more pushing the two buttons simultane-
ously.
Gives access to the menu (or cutout an alarm)
Gives access to changes
Saves a change
Examples of operations
Set set-point for the thermostat
1. Push the two buttons simultaneously
2. Push one of the buttons and select the new value
3. Push both buttons again to conclude the setting
Set one of the other menus
1. Push the upper button until a parameter is shown
2. Push one of the buttons and find the parameter you want to
change
3. Push both buttons simultaneously until the parameter value is
shown
4. Push one of the buttons and select the new value
5. Push both buttons again to conclude the setting
*) Used only when thermostat function (r14 = 1) is selected.
**) The display on the controller can display 3 digits only, but the setting value has
4 digits. Only the 3 most important will be shown. It means f.ex. . 250 will give a
setting of 2500.
Function
Pa-
ram-
eter
Min.
Max.
Fac.
sett.
Normal display
Shows the actual superheat/ valve's opening
degree/ temperature
Define view in o17
-
K
If you wish to see the expansion valve’s actual
opening degree, give the lower button a brief
push (1s). Define view in o17
-
%
Reference
Set the required set point for the thermostat
- *
-60°C
50°C
3.0
Differential
r01 *
0.1 K
20.0 K
2.0
Units (0=°C+bar /1=°F+psig)
r05
0
1
0
External contribution to the reference
r06
-50 K
50 K
0..0
Correction of signal from S2
r09
-10.0 K 10.0 K
0.0
Correction of signal from S3
r10
-10.0 K 10.0 K
0.0
Start / stop of refrigeration
r12
OFF
On
On
Define thermostat function
(0= no thermostat function, 1=On/off thermo-
stat)
r14
0
1
0
Alarm
Upper deviation (above the temperature setting) A01 * 3 K
20 K
5
Lower deviation (below the temperature setting) A02 * 1 K
10 K
3
Alarm’s time delay
A03 * 0 min. 90 min. 30
Battery monitoring
A34
Ooff
On
Off
Regulating parameters
P: Amplification factor Kp
n04
0.5
20
3.0
I: Integration time T
n05
30 s
600 s
120
D: Differentiation time Td (0 = off)
n06
0 s
90 s
0
Max. value of superheat reference
n09
2 K
30 K
10
Min. value of superheat reference
n10
1 K
12 K
4
MOP (max = off)
n11
0.0 bar 60 bar
20
Signal reliability during start-up. Safety time
period. Should only be changed by trained staff
n15
0 s
90 s
0
Signal reliability during start-up – Opening
degree’s start value. Should only be changed by
trained staff.
n17
0%
100%
0
Stability factor for superheat control.
Changes should only be made by trained staff
n18
0
10
5
Damping of amplification around reference value
Changes should only be made by trained staff
n19
0.2
1.0
0.3
Amplification factor for superheat
Changes should only be made by trained staff
n20
0.0
10.0
0.4
Definition of superheat control
1=MSS, 2=LOADAP
n21
1
2
1
Value of min. superheat reference for loads under
10%
n22
1 K
15 K
2
Max. opening degree
Changes should only be made by trained staff
n32
0 %
100 %
100
”n37” to ”n42” are adapted to valve type ETS 50 and
should only be changed through the use of another
valve.
Number of steps from 0-100% opening degree
(x10)
(ETS 50 = 263. ETS 100 = 353)
n37
000
stp**
5000
stp **
263
Number of steps per second
n38
10 stp/s
300
stp/s
250
Compensation of spindle play at the valve’s
closing point
n39
0 stp
100 stp 50
Compensation of spindle play in the control
range
n40
0 stp
100 stp 100
Valve status when power supply interrupted:
1 = NC, 2 = NO (special application)
n41
1
2
1
Compensation of spindle play at the closing
point must take place: 1=when the valve opens,
2=when the valve closes
n42
1
2 stp
1
Attenuation factor for inner loop
n43
0,1
1
0.4
Integration time for inner loop (TnT0)
n44
10 s
120 s
30
Safety value for lower temperature difference for
inner loop
n45
1 K
20 K
3.0
