Product Overview

© Danfoss | DCS | 2019.04
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C
DKRCC.PD.RS0.A4.02 | 36
EKE Controller
EKE 1A EKE 1B EKE 1C Parameters
Input Output conguration
DI 1 Not Used
Main Switch
Bus -> Start /Stop
Main Switch
Bus -> Start /Stop
Main Switch
For EKE 1A O003
For EKE 1B and 1C O002
DI 2 Not Used
Defrost start
* Manual
Preset OD
Heat / Cool
Not Used
Defrost start
* Manual
Preset OD
Heat / Cool
Not Used
Defrost start
* Manual
Preset OD
Heat / Cool
[O022 DI2
conguration]
DI 3 Not Used
Defrost start
*Manual
Preset OD
Heat / Cool
- -
[O037 DI3
conguration]
AI 1
-
Not Used
S3
S4
Not Used
S3
S4
[I020 AI1
conguration]
AI 2 S2 S2 S2
AI 3 p0 p0 p0
AI 4 Not Used
ExtRef
Not Used
ExtRef
Not Used
ExtRef
[I021 AI4
conguration]
AI 5
- -
Not Used
S3
S4
[I022 AI5
conguration]
DO 1 Alarm
Liquid Line -
Shut O, Max
Capacity
Alarm
Liquid Line -
Shut O, Max
Capacity
Alarm
Liquid Line -
Shut O, Max Capacity
[O013 DO1
conguration]
* Described in the section “Manual Mode”
IO Conguration
Alarm and error codes:
Before starting the controller it is necessary to clear all active alarms and error. The regulation may
not start if there is active alarms and error. When detecting a ashing bell alarm in MMIGRS2 display,
or active alarms in Koolprog, it has to be solved. In these tools, alarm description can be found as a
text message in the Status menu under Active alarms.
If more alarms / errors occur simultaneously, they will be shown as subsequent text lines.
If settings and sensor mounting is correct you will only see “W002 standby alarm” in the alarm list.
which can be clear by setting “Reference”, “R012 Main switch” = ON.
The details about the Alarms and Errors can be found on the section ‘Alarm table’.
12.3 First Start up
After completing the above specied check list, the controller is now ready for start up operation.
First of all, make sure that S2, S4, Pe/Te and superheat is OK. Actual values can found under home
screen in MMIGRS2 display or under menu group “service”in Koolprog.
You can now make the rst startup. Start the application and make sure that the main switch R012 is
ON together with the compressor starting.
At startup, if the controller is not having optimal performance, following are some of the general
tips to tune the controller
• Observe if the valve opens when compressor is starting (024 Actual OD , U118 Operation status)
• Superheat (021 Actual superheat) is not low (below 3K) for long time (1 min), if so N017 startup
OD can be adjusted to a lower value
• Superheat is not too high (higher than 15-20K) for long time 3 min, if so N017 startup OD can be
adjusted to a higher value
• After 10 min of operation, the superheat should be close to reference (± 2K)
• After 20 min of operation valve is not hunting ( you can select 021 Actual superheat, 024 Actual OD,
U026 Te saturated evaporation temperature and U022 Actual SH reference for logging and see
the live graph)