Danfoss Controller type AKC 121A. Vers. 2.2x. AKA 21 Installation guide
- Category
- Thermostats
- Type
- Installation guide
Danfoss Controller type AKC 121A. Vers. 2.2x. AKA 21 is a versatile refrigeration control system designed for precise temperature management in various applications. With its user-friendly interface via the AKA 21 control panel, you can easily monitor and adjust settings for individual refrigeration appliances or cold rooms.
Key features include:
-
Multi-unit Connectivity: Connect and operate up to 125 controllers within a single network, allowing for centralized control and monitoring of multiple refrigeration systems.
-
Alarm Management: Receive real-time alerts and error notifications directly on the control panel display. Easily acknowledge and clear alarms to maintain efficient operation.
Danfoss Controller type AKC 121A. Vers. 2.2x. AKA 21 is a versatile refrigeration control system designed for precise temperature management in various applications. With its user-friendly interface via the AKA 21 control panel, you can easily monitor and adjust settings for individual refrigeration appliances or cold rooms.
Key features include:
-
Multi-unit Connectivity: Connect and operate up to 125 controllers within a single network, allowing for centralized control and monitoring of multiple refrigeration systems.
-
Alarm Management: Receive real-time alerts and error notifications directly on the control panel display. Easily acknowledge and clear alarms to maintain efficient operation.
REFRIGERATION AND AIR CONDITIONING
Controller
- AKC 121A
Refrigeration and Air Conditioning Controls
Menu operation via AKA 21
ADAP-KOOL
®
Refrigeration control systems
2 Menu operation RC.1M.A4.02 © Danfoss 06/2002 AKC 121A Version 2.2x
System survey
A refrigerating plant fitted with ADAP-KOOL
®
refrigeration controls will mostly consist of several
controllers or monitoring units, where each controller will regulate its own refrigeration
appliance/cold room.
The system has been designed in such a way that contact can be made to each and every
controller via a data communication system. One specific controller is selected, and it will now
be possible to make settings and readouts for this unit.
The individual monitoring units type AKC 121A can be
operated in two ways:
1. With control panel type AKA 21.
Use this document when operation takes place in this
way.
2. With PC and system software type AKM.
Operation
Validity
This menu operation (dated January 2002), applies to AKC 121A with the code number
084B2051 fitted with software version 2.2x.
AKC 121A Version 2.2x Menu operation RC.1M.A4.02 © Danfoss 06/2002 3
All controllers that are connected to the same network can be operated with the control panel.
There may be as many as 125 controllers, and they are shown in groups of 16 on the display.
A system is shown here which consists of more than 16 controllers. The meaning of the letters
is, as follows:
A: AKC or AKL controller
E: Controller with active ERROR (on addresses 2, 11 and 12 in this example)
g: Gateway (to addresses 13 and 14 in this example)
G: Gateway with connected printer
: A blank field indicates that there is no unit with this address.
Select the unit that is to be operated by using the “+/On” or “-/Off” key, and push “Enter”. In this
example you select the controller with address 4.
If the system comprises more than 16 units or units with an address code higher than 16, you
may change to the next group by pushing "→".
When a controller has been selected, you can make settings in it. This setting is performed, as
follows:
Shown in the upper right corner of the display is the setting with which the controller is
operating. Below that value a new setting may be made. Use the three keys “+/ON”, “-/OFF”
and “Digit” for setting the new value. This new value will not govern the regulation until you
push the key “Enter”.
Select a controller
Settings of a controller
5
-50 to +50 5
ON
OFF / ON ON
The functions in the controller can be protected by means of an access code. Depending on
the settings to be made, you may gain access in one of the following ways:
User input: Gives access to:
1. Push F1 Display of alarms
2. Push F2 Readout of actual values
3. Code 1 and then F1 Acknowledgement of alarms
Code 1 and then F3 Setting of selected parameters
4. Code 2 Operation of all settings of the entire menu system
(with system software type AKM there is access to
additional functions).
Pages 6 and 7 contain a description of how you gain access to the system via a code.
Access to a controller
1 < 1 > 16
AEAAAAAAAAEEgg A
1 < 4 > 16
AEAAAAAAAAEEgg A
17 < 17 > 32
AAA
4 Menu operation RC.1M.A4.02 © Danfoss 06/2002 AKC 121A Version 2.2x
A supporting text is attached to the individual functions. When such a function is shown in the
control panel’s display, the supporting text can be obtained by pushing the key “Help”. The
supporting text is intended as a help to users who no longer use these operating instructions.
In the menus shown below functions with supporting texts are identified with the word “Help”
next to the function.
When an error appears in a system, it can be seen on the control panel’s display which will
show an “E”. If the control panel shows a text from a selected controller, the LED at the word
“Alarm” will flash.
When an error has occurred, first select the controller on which the error is registered. When
the controller has been found, push “F1”, and the error message will appear.
At the end of the document there is a list of all the error messages and a description of how to
acknowledge an alarm.
1 < 2 > 16
AEAAAAAAAAAAgg A
AKC 121A Adr: 2
E Mon-11:27
Standby Mode
When one controller has been selected from the total system, the following display will
appear (the display is the first one shown when you have selected an address from the total
system):
e.g.
AKC 121A Adr: 2
E Mon-11:27
From this position you can freely choose between several forms of operating levels:
1. Display of alarms - push “F1”
2. Display and setting of a few selected functions - push “F2”
3. Display and setting of several selected functions - push “F3”
The function may be protected with a code (code 1)
4. Display and setting of all allowed functions in the controller. The function may be protected
with a code (code 2).
Operation of the individual levels is shown below:
When you push “F1” the alarm messages from the controller in question appear. Only active
alarms are shown. With a push on "↓" you can see whether there are more alarm messages,
and if so, their texts.
When an alarm has been localised and corrected, the alarm is acknowledged (removed from
the system, so that it no longer appears). In large systems where a gateway is also connected
this acknowledgement will take place automatically. In other systems it has to be done
manually, cf. end of the document.
Prior to the acknowledgement of the alarm, the keying of a code is required, see page 6.
Leave the F1 function by pushing "←".
Supporting text
How to localise an error
Functions of a controller
1. F1
AKC 121A Version 2.2x Menu operation RC.1M.A4.02 © Danfoss 06/2002 5
When you push “F2” a number of functions will appear where it is possible to read or set
values.
You can move to and from the individual functions by pushing "↑" or "↓". On page 3 you can
see how a setting i changed.
Man. Def Manual defrost is activated when ON
ON/OFF (changes automatically to OFF)
6:03:01
CutOut °C A Setting of thermostat cutout value section A
-50 - 50
3:03:02
CutOut °C B Setting of thermostat cutout value section B
-50 - 50
4:03:01
Ther. Air A Actual air temperature for thermostat in section A
3:02:01
Ther.Air B Actual air temperature for thermostat in section B
4:02:01
S3 °C A Temperature at S3 sensor section A
3:02:03
S3 °C B Temperature at S3 sensor section B
4:02:03
S4 °C A Temperature at S4 sensor section A
3:02:04
S4 °C B Temperature at S4 sensor section B
4:02:04
S5°C A Temperature at S5 sensor section A
3:02:05
S5 °C B Temperature at S5 sensor section B
4:02:05
Leave the F2 function by pushing "←".
2. F2
6 Menu operation RC.1M.A4.02 © Danfoss 06/2002 AKC 121A Version 2.2x
When you push “F3”, a number of functions will appear which are used when the system is
serviced.
• If access code is used (code 1), key it as follows:
- Push the “key”
- Enter the code by using the three keys “+”, “-” and “Digit” (the code is mentioned later
as code 1, and the factory setting is 40. If code 2 has been set at 0, access code 1
cannot be used).
- Push “Enter”
- Push “F3”
Move to and from the individual functions by pushing "↑" or "↓".
On page 3 you can see how a setting is changed.
Main Switch Main switch: 1: Regulation
-1 / 0 / 1 0: Controller stop
2:02:01 -1: Service
RegCond A Regulating condition for section A
3:02:10 0: No cooling 5: Awaiting defrost stop on last section
1: Cooling 6: Forced closing
4: Defrosting 8: Emergency cooling (sensor failure)
10: Forced cutout (Melt function)
RegCond B Regulating condition for section B
4:02:10 0: No cooling 5: Awaiting defrost stop on last section
1: Cooling 6: Forced closing
4: Defrosting 8: Emergency cooling (sensor failure)
10: Forced cutout (Melt function)
NightCond Status of day/night function
3:02:11 Off = "day" and ON = "night"
OD % A Modulating: Refrigeration requirement in section A
3:02:08
OD % B Modulating: Refrigeration requirement in section B
4:02:08
Run Time A ON/OFF: Present refrigeration period (thermostat cutin) or duration
3:02:09 of last completed period, section A.
Run Time B ON/OFF: Present refrigeration period (thermostat cutin) or duration
4:02:09 of last completed period, section B
DefTime A Actual defrost cutin time or duration of the latest finished
6:02:02 defrosting period in section A
DefTime B Actual defrost cutin time or duration of the latest finished
6:02:04 defrosting period in section B
Leave the function by pushing "←".
3. F3
AKC 121A Version 2.2x Menu operation RC.1M.A4.02 © Danfoss 06/2002 7
4. Access to all
functions
The access to the functions may be protected with a code (code 2).
• If access code is used, key it as follows:
- Push the “key”
- Enter the code by using the three keys “+”, “-” and “Digit”
- Push “Enter”
- Push "←"
Move to and from the individual functions by pushing the four arrow keys.
On page 3 you can see how a setting is changed.
When you wish to leave the “Access to all functions” function, push “Clear” and then "←".
List of functions on level 1:
1. Controller’s access picture and access to system information
2. Switch and selection of language
3. Measurements and configurations for section A
4. Measurements and configurations for section B
5. Common settings for section A and B
6. Defrost function
7. Configuration
8. Forced-control functions for service
9. Alarm destinations
Below and on the following pages the individual functions are shown together with a brief
description:
Level 1 Level 2 Level 3 Level 4 Description
AKC 121A Adr: xxx Controller access display
Mon hh:mm If the code function is used, continue by pushing the "key"
key.
Enter Code Entry of access code 1 or access code 2 (cf. also 1:07 and
0 - 255 0 1:08). Continue by pushing "arrow left"
1:01
AKC 121A Adr: xxx Access to system information
Mon hh:mm If an E appears in the display, an error has been registered.
1
Code No. Reading of the controller’s code no. and programme version.
Prog. Ver.
1:02
Clock: Setting of controller clock (AKC clock)
Mon hh:mm
1:03
Clock: Day. Setting of day (1 = Monday, 7 = Sunday)
Mon(1) Sun(7)
1:03:01
Clock: Hou
r
Setting of hours
0 - 23
1:03:02
Clock: Min. Setting of minutes
0 - 59
1:03:03
System Address Reading of the controller’s system address
Addr. yyy xxx yyy=network no. and xxx=address.
1:04 The system address can only be set via PC
Alarm report to Reading of the alarm address (end receiver) the alarms are
Addr. yyy xxx to be sent to.
1:05 The alarm address can only be set via PC.
Gateway Address Reading of the address on the nearst gateway which has to
xxx effect alarms (see 1:05)
1:06 The address can only be set via PC
8 Menu operation RC.1M.A4.02 © Danfoss 06/2002 AKC 121A Version 2.2x
Chg. Code1 Change of code 1. The code gives access to akknowlegdement of
0 - 255 active alarm by means of the F1 key.
1:07 Also access to the selected settings/readouts via the F3 key.
(Factory setting = 40) (See also code 2)
Chg. Code2 Change of code 2. The code gives access to the whole
0 - 255 menusystem.
1:08 (Factory setting = 0. Setting = 0 offers free access where
neither code 1 nor code 2 is required)
Main Function Main function
2
Alarm Message In case of alarm, an E is shown on the display
2:01 (error log becomes visible)
See page 18, check of error log
2:01:01
Main Function Access to the main switch
Settings
2:02
Main Switch Main switch: 1: Regulation
-1 / 0 / 1 Help 0: Controller stop
2:02:01 -1: Service
Language Selection of language. Six languages have been entered
0 - 6 Help in the controlle
r
2:02:02 0: English 3: Danish
1: German 4: Spanish
2: French 6: Swedish
NB! This function must be set prior to any uploading to
systemsoftware type AKM.
When the language code has been changed, push "ENTER"
and then "Clear".
Controller A Measurements and configurations for section A
3
Alarm messsage In case of alarm, an E is shown on the display
3:01 (error log becomes visible)
See page 18, check of error log
3:01:01
Thermostat Readout of measurin
g
values related to section A
Measurements
3:02
Ther. Air A Actual air tem
p
erature for thermostat in section A
3:02:01
Wei
g
hted A Wei
g
hted dis
p
la
y
3:02:02 The measured tem
p
eratures from S3 and S4 are shown with
the calculation defined in S4 Da
y
%
(
3:3:4
)
or S4 Ni
g
ht %
(
3:3:5
)
S3 °C A Tem
p
erature at S3 sensor section A
3:02:03
S4 °C A Tem
p
erature at S4 sensor section A
3:02:04
S5°C A Tem
p
erature at S5 sensor section A
3:02:05
Cut In °C A Actual thermostat cutin value section A
3:02:06
CutOut °C A Actual thermostat cutout value section A
3:02:07
OD % A This and the next readout depend on the thermostat selected unde
r
3:02:08 "7:1". There will only be a readout on one of the display units:
Modulatin
g
: Refri
g
eration re
q
uirement in section A
Run Time A ON/OFF: Present refri
g
eration
p
eriod
(
thermostat cutin
)
or duration
3:02:09 of last com
p
leted
p
eriod, section A.
AKC 121A Version 2.2x Menu operation RC.1M.A4.02 © Danfoss 06/2002 9
Re
g
Cond A Re
g
ulatin
g
condition for section A
3:02:10 0: No coolin
g
5: Awaitin
g
defrost sto
p
on last section
1: Coolin
g
6: Forced closin
g
4: Defrosting 8: Emergency cooling (sensor failure)
10: Forced cutout (Melt function)
Ni
g
htCond Status of da
y
/ni
g
ht function
3:02:11 Off = "da
y
" and ON = "ni
g
ht"
Thermostat Ctrl. Settin
g
s for thermostat function
Settin
g
s
3:03
Ther. Sx A Define thermostat senso
r
1 - 3 1: S3 used
3:03:01 2: S4 used
3: S3, S4 used. CPT
(
calculated
p
roduct tem
p
erature
)
CutOut °C A Settin
g
of thermostat cutout value section A
-50 - 50
3:03:02
Diff. K A Settin
g
of thermostat differential section A
0.1 - 10
3:03:03
S4 Da
y
% A S4 wei
g
htin
g
b
y
da
y
0 - 100 S3 is automaticall
y
wei
g
hted. Must onl
y
be set if "Ther.Sx" = 3
3:03:04
S4 Ni
g
ht % A S4 is wei
g
htin
g
at ni
g
ht
0 - 100 S3 is automaticall
y
wei
g
hted
3:03:05
Dt Ni
g
ht A Ni
g
ht set back value section A
-25 - 25
3:03:06
Air Tem
p
. Alarm Settin
g
s for alarm function
Settin
g
s Alarm definitions for: S3A, S4A and S5A.
3:04
Hi
g
h S3A Hi
g
h air tem
p
erature alarm limit, section A
(
absolute value
)
-50 - 50
3:04:01
Low S3A Low air tem
p
erature alarm limit, section A
(
absolute value
)
-50 - 50
3:04:02
Hi
g
h S4A Hi
g
h air tem
p
erature alarm limit, section A
(
absolute value
)
-50 - 50
3:04:03
Low S4A Low air tem
p
erature alarm limit, section A
(
absolute value
)
-50 - 50
3:04:04
Hi
g
h S5A Hi
g
h air tem
p
erature alarm limit, section A
(
absolute value
)
-50 - 50
3:04:05
Low S5A Low air tem
p
erature alarm limit, section A
(
absolute value
)
-50 - 50
3:04:06
Hi
g
hDel1 A Time dela
y
for alarm after start-u
p
, forced closin
g
, defrost, or when
0 - 240 function switch is in
p
osition 0/-1.
3:04:07
(
Time is common to all three sensors
)
Hi
g
hDel2 A Time dela
y
for alarm durin
g
normal re
g
ulation
0 - 60
(
Time is common to all three sensors
)
3:04:08
Low Del. A Time dela
y
for alarm when too low tem
p
erature is re
g
istered
0 - 60
(
Time is common to all three sensors
)
3:04:09
10 Menu operation RC.1M.A4.02 © Danfoss 06/2002 AKC 121A Version 2.2x
Controller B The settin
g
s for section A also a
pp
l
y
to section B. Please refe
r
4 to the above information.
Common Settin
g
s Functions common to sections A and B
5
Da
y
/Ni
g
ht Ctrl. Settin
g
s of da
y
/ni
g
ht function
Settin
g
s
5:01
Da
y
/Ni
g
ht Choose da
y
-/ni
g
ht o
p
eration function
0 3 Hel
p
0: No ni
g
ht setback
5:01:01 1: Chan
g
e between da
y
and ni
g
ht o
p
eration accordin
g
to
si
g
nal on DI in
p
ut
2: Chan
g
e between da
y
and ni
g
ht o
p
eration accordin
g
to
internal time clock
3: Chan
g
e between da
y
and ni
g
ht o
p
eration accordin
g
to the
si
g
nal from the master controller
(
Si
g
nal via DANBUSS
)
Mo Da
y
h Time table for da
y
o
p
eration on monda
y
s
0 - 24 End of ni
g
ht setback
5:01:02 At settin
g
= 0 there is no ni
g
ht setback this da
y
Mo Ni
g
ht h Time table continued:
0 - 24 Start
(
of ni
g
ht setback
)
5:01:03 At settin
g
= 0 there is no ni
g
ht setback this da
y
Tu If da
y
and ni
g
ht settin
g
s are identical, and if ni
g
ht is set before
We the function will be chan
g
ed. See function descri
p
tion.
Th
Fr Settin
g
s can also be made for the remainin
g
da
y
s of the week in
Sa comformity with the two settings shown above
Su
|
Railheat Pulsin
g
Settin
g
s for railheat function
(Day/Night)
5:02
RailOnDa
y
%Durin
g
da
y
o
p
eration: Settin
g
of rail heat ON
p
eriod in
p
ercent
0 - 100 of the "RailC
y
cl m" time
5:02:01
|
RailOnN
g
t% Durin
g
ni
g
ht o
p
eration: Settin
g
of rail heat ON
p
eriod in
p
ercent
0 - 100 of the "RailC
y
cl m" time
5:02:02
|
RailC
y
cl m Period time for total ON / OFF time
6 - 60
5:02:03
Defrost Control Defrost function
6
Alarm messsa
g
e In case of alarm, an E is shown on the dis
p
la
y
6:01
(
error lo
g
becomes visible
)
See
p
a
g
e 18, check of error lo
g
6:01:01
Defrost Read-out of mesurin
g
values related to defrost function
Measurements
6:02
S5 °C A Defrost sensor tem
p
erature in section A
6:02:01
DefTime A Actual defrost cutin time or duration of the latest finished
6:02:02 defrostin
g
p
eriod in section A
S5 °C B Defrost sensor tem
p
erature in section B
6:02:03
DefTime B Actual defrost cutin time or duration of the latest finished
6:02:04 defrostin
g
p
eriod in section B
AKC 121A Version 2.2x Menu operation RC.1M.A4.02 © Danfoss 06/2002 11
Defrost Start Settin
g
s of defrost start
Method
6:03
Man. Def Manual defrost is activated when ON
ON/OFF
(
chan
g
es automaticall
y
to OFF
)
6:03:01
Def Sched Defrost will be started in accordance with the settin
g
s in defrost
ON/OFF tables 1, 2 and 3
(
6:06, 6:07 and 6:08
)
6:03:02
Pum
p
Down A Dela
y
time
p
rior to start of
g
as defrost. Section A
0-60 The eva
p
orator is drained of refri
g
erant throu
g
h the
6:03:03 mian valve in the suction line. Set in minutes.
Pum
p
Down B Dela
y
time
p
rior to start of
g
as defrost. Section B
0-60 The eva
p
orator is drained of refri
g
erant throu
g
h the
6:03:04 mian valve in the suction line. Set in minutes.
Defrost Sto
p
Definition of how defrost sto
p
is made, and how start-u
p
afte
r
Tem
p(
1
)
/Time
(
2
)
defrost take
p
lace
6:04
Tem
p
/TimeA 1: Tem
p
erature sto
p
(
time as securit
y)
1 - 2 2: Sto
p
on time
6:04:01
(
section A
)
MaxDefTimA Max.
p
ermissible defrost time in minutes. Section A.
5 - 180
(
Securit
y
time on tem
p
erature sto
p)
6:04:02
DefSto
p
°C A Tem
p
erature value of defrost sto
p
. Section A
0 - 60
6:04:03
DrainDown A Dela
y
time when defrost com
p
leted. Section A.
0 - 60 The eva
p
orator is drained of condensed refri
g
erant throu
g
h
6:04:04 the drain valve. Set in minutes.
Tem
p
/TimeB 1: Tem
p
erature sto
p
(
time as securit
y)
1 - 2 2: Sto
p
on time
6:04:05
(
section B
)
MaxDefTimB Max.
p
ermissible defrost time in minutes. Section B.
5 - 180
(
Securit
y
time on tem
p
erature sto
p)
6:04:06
DefSto
p
°C B Tem
p
erature value of defrost sto
p
. Section B
0 - 60
6:04:07
DrainDown B Delay time when defrost completed. Section B.
0-60 The evaporator is drained of condensed refrigerant through
6:04:08 the drain valve. Set in minutes.
Fan Del. m Time delay before fans are started (the time starts when the
0 - 60 defrost period for both sections has been completed)
6:04:09
CentralDef ON: Valve A and B are open during the defrost period.
ON-OFF OFF: Valve A and B are closed during the defrost period.
6:04:10
(
Defrost se
q
uence: Pum
p
down, defrost, draindown
)
ComDefSto
p
Definition of how refri
g
eration is restarted
ON - OFF ON: Refri
g
eration must not be started until both sections have
6:04:11 com
p
leted their defrost
OFF: Refri
g
eration can be started individuall
y
in both sections
12 Menu operation RC.1M.A4.02 © Danfoss 06/2002 AKC 121A Version 2.2x
Def. Schedule Definition of defrost
p
ro
g
ramme to be used on the different da
y
s
Da
y
selection of the week
6:05
Mon Sched Choose defrost
p
ro
g
ram for monda
y
: 1, 2 or 3
1 - 3
6:05:01
Tue
Settin
g
s must also be made for the remainin
g
da
y
s of the week in
Wed
conformit
y
with the above settin
g
Thu
Fri
Sat
Sun
Schedule 1 Settin
g
s for defrost
p
ro
g
ramme 1
Def. Start Times
6:06
No. Per Da
y
Number of defrosts / 24 hours
0 - 8
6:06:01
Def1 Sc1 Settin
g
of time the 1st defrost be
g
ins
00:00
6:06:02
Def1 Sc1 Hou
r
Settin
g
of hours
0 - 23
6:06:02:01
Def1 Sc1 Min Settin
g
of minutes
0 - 59
6:06:02:02
Def2 Sc1
If several defrost
p
eriods have been selected, the
y
must also have
Def3 Sc1
settin
g
s in comformit
y
with the three above mentioned ones
Def4 Sc1
Def5 Sc1
Def6 Sc1
Def7 Sc1
Def8 Sc1
Schedule 2
Also make settin
g
s for defrost
p
ro
g
rammes 2 and 3, if the
y
are to be
Schedule 3
used
Confi
g
uration Confi
g
uration
Settin
g
s
7
Control Confi
g
uration of sections A and B
Section A/B
7:01
Ctrl. A Section A
ON/OFF ON: Re
g
ulation
7:01:01 OFF: No re
g
ulation
Ctrl. B Section B
ON/OFF ON: Re
g
ulation
7:01:02 OFF: No re
g
ulation
Thermostat Define thermostat function’s re
g
ulatin
g
mode
ON/OFF(1)PWM(2)
7:02
TherMode A Section A
1 - 2 1: ON/OFF thermostat
7:02:01 2: Modulatin
g
thermostat
TherMode B Section B
1 - 2 1: ON/OFF thermostat
7:02:02 2: Modulatin
g
thermostat
AKA 14 A Read-out on AKA 14
(
section A
)
1 - 5 1: S3A
7:02:03 2: S4A
3: S5A
4: Air Tem
p
A
5: Wei
g
hted A
AKC 121A Version 2.2x Menu operation RC.1M.A4.02 © Danfoss 06/2002 13
AKA 14 B Read-out on AKA 14
(
section B
)
1 - 5 1: S3B
7:02:04 2: S4B
3: S5B
4: Air Tem
p
B
5: Wei
g
hted B
Senso
r
Sensor calibration
Calibration
7:03
Corr S3A Correction of si
g
nal from "S3A" senso
r
-10 - 10
7:03:01
Corr. S4A Correction of si
g
nal from "S4A" senso
r
-10 - 10
7:03:02
Corr. S5A Correction of si
g
nal from "S5A" senso
r
-10 - 10
7:03:03
Corr. S3B Correction of si
g
nal from "S3B" senso
r
-10 - 10
7:03:04
Corr. S4B Correction of si
g
nal from "S4B" senso
r
-10 - 10
7:03:05
Corr. S5B Corretion of si
g
nal from "S5B" senso
r
-10 - 10
7:03:06
DI1 Confi
g
Confi
g
uration of "DI1" in
p
ut
Def
(
1
)
Ni
g
ht
(
2
)
7:04
DI1 Confi
g
1: A
p
ulse si
g
nal at the in
p
ut will start a defrost c
y
cle
1 - 2 2: An on/off switch at the in
p
ut will chan
g
e between da
y
and ni
g
ht
7:04:01 o
p
eration
DO1 Confi
g
Confi
g
uration of "DO1" out
p
ut
Rail Night Fan
7:05
DO1 Confi
g
1: The out
p
ut is used for im
p
ulse control of the rail heat
1 - 3 2: The out
p
ut must follow the times indicated in the da
y
/ni
g
ht table
7:05:01 3: The out
p
ut is used for controllin
g
the fans
14 Menu operation RC.1M.A4.02 © Danfoss 06/2002 AKC 121A Version 2.2x
Service Mode Service function
8
Measurements of Measurements on inlets
in
p
ut Terminals
8:01
S3 °C A Tem
p
erature at S3 sensor section A
8:01:01
Corr. S3A Set correction value for the "S3A" senso
r
8:01:02
S4 °C A Tem
p
erature at S4 sensor section A
8:01:03
Corr. S4A Set correction value for "S4A" senso
r
8:01:04
S5 °C A Tem
p
erature at "S5" sensor section A
8:01:05
Corr. S5A Set correction value for "S5A" senso
r
8:01:06
ON in
p
ut A Status of ON in
p
ut section A
(
terminals 94-95
)
8:01:07
S3 °C B Tem
p
erature at "S3" sensor section B
8:01:08
Corr. S3B Set correction value for "S3B" senso
r
8:01:09
S4 °C B Tem
p
erature at "S4" sensor section B
8:0110
Corr. S4B Set correction value for "S4B" senso
r
8:01:11
S5 °C B Tem
p
erature at "S5" sensor section B
8:01:12
Corr. S5B Set correction value for "S5B" senso
r
8:01:13
ON in
p
ut B Status of ON in
p
ut section B
(
terminals 104-105
)
8:01:14
DI1 in
p
ut Status of DI in
p
ut
(
terminals 106-107
)
8:01:15
State of Out
p
uts Status of Out
p
uts
8:02
Valve st. A Status of valve out
p
ut section A
(
terminals 10-11
)
8:02:01
Defr.st. A Status of defrost out
p
ut section A
(
terminals 12-13
)
8:02:02
Valve st. B Status of valve out
p
ut section B
(
terminals 14-15
)
8:02:03
Defr.st. B Status of defrost out
p
ut section B
(
terminals 16-17
)
8:02:04
DO1 st. Status of DO1 out
p
ut
(
terminals 18-19
)
8:02:05
Al.Rel.st. Status of alarm out
p
ut
(
terminals 20-21
)
8:02:06
AKC 121A Version 2.2x Menu operation RC.1M.A4.02 © Danfoss 06/2002 15
Manual control Forced o
p
eration of outlets durin
g
service
of Out
p
uts "Main Switch" must be set to : "-1"
(
see 2:02:01
)
8:03
Man. Ctrl. ON: Manual control is
p
ermitted when "Main Switch" = -1
ON/OFF NOTE: No monotorin
g
8:03:01 When manual settin
g
is finished, settin
g
must be chan
g
ed
to OFF
Valve A
ON/OFF Forced o
p
eration of valve outlet section A
8:03:02
Defrost A Forced o
p
eration of defrost outlet section A
ON/OFF
8:03:03
Valve B Forced o
p
eration of valve outlet section B
ON/OFF
8:03:04
Defrost B Forced o
p
eration of defrost outlet section B
ON/OFF
8:03:05
DO1 out
p
ut Forced o
p
eration of DO1 outlet
ON/OFF
8:03:06
AlarmRela
y
Forced o
p
eration of alarm outlet
(
terninal 20-21
)
ON/OFF ON: Rela
y
switch closed
(
no alarm
)
8:03:07 OFF: Rela
y
switch interru
p
ted
(
alarm
)
16 Menu operation RC.1M.A4.02 © Danfoss 06/2002 AKC 121A Version 2.2x
Alarm Alarm
p
riorities
destinations Set
p
riorit
y
for the followin
g
alarm texts
9 Choose between 1,2,3 or 0. The
y
have the followin
g
meanin
g
:
1: Alarm at AKC121A rela
y
out
p
ut + DO 2 on master
g
atewa
y
+ messa
g
e on DANBUSS
2: DANBUSS messa
g
e onl
y
3: Alarm at AKC121A rela
y
out
p
ut + DANBUSS messa
g
e
0: No activit
y
Sensor Alarms when there are sensor faults
Alarms
9:01
S3 Error A S3A
0 - 3
9:01:01
S4 Error A S4A
0 - 3
9:01:02
S5 Error A S5A
0 - 3
9:01:03
S3 Error B S3B
0 - 3
9:01:04
S4 Error B S4B
0 - 3
9:01:05
S5 Error B S5B
0 - 3
9:01:06
Other Other alarms
Alarms The alarm will sound if:
9:02
Network ON: When alarms are re
g
istrered via PC or Gatewa
y
p
rinte
r
ON/OFF OFF: When alarms are re
g
istrered via AKA 21, onl
y
9:02:01
Standb
y
Mod The re
g
ulation is sto
pp
ed.
0 - 2
9:02:02
ChClockSet The controller has been without su
pp
l
y
volta
g
e
0 - 3
9:02:03
Hi
g
h S3A The S3A tem
p
erature exceeds the max. limit
0 - 3
9:02:04
Low S3A The S3A tem
p
erature
g
oes below the min. value
0 - 3
9:02:05
Hi
g
h S4A The S4A tem
p
erature exceeds the max. limit
0 - 3
9:02:06
Low S4A The S4A tem
p
erature
g
oes below the min. value
0 - 3
9:02:07
Hi
g
h S5A The S5A tem
p
erature exceeds the max. limit
0 - 3
9:02:08
AKC 121A Version 2.2x Menu operation RC.1M.A4.02 © Danfoss 06/2002 17
Low S5A The S5A tem
p
erature
g
oes below the min. value
0 - 3
9:02:09
Hi
g
h S3B The S3B tem
p
erature exceeds the max. limit
0 - 3
9:02:10
Low S3B The S3B tem
p
erature
g
oes below the min. value
0 - 3
9:02:11
Hi
g
h S4B The S4B tem
p
erature exceeds the max. limit
0 - 3
9:02:12
Low S4B The S4B tem
p
erature
g
oes below the min. value
0 - 3
9:02:13
Hi
g
h S5B The S5B tem
p
erature exceeds the max. limit
0 - 3
9:02:14
Low S5B The S5B tem
p
erature
g
oes below the min. value
0 - 3
9:02:15
DefTimExce Defrost is sto
pp
ed on max. time
(
defrost sto
p
tem
p
erature not
0 - 3 reached within the set safet
y
time
)
9:02:16
DI1Def.On There is still si
g
nal on the DEFR in
p
ut 30 minutes after the
0 - 3 termination of a defrost
9:02:17
Ctrl. Off A Set section A Off
0 - 3
9:02:18
Ctrl. Off B Set section B Off
0 - 3
9:02:19
18 Menu operation RC.1M.A4.02 © Danfoss 06/2002 AKC 121A Version 2.2x
Alarm message
The followin
g
dis
p
la
y
read-outs are onl
y
visible if there is an active error.
A or B in brackets show in which section an active error is recorded.
When the error is corrected, the error messa
g
e can be removed b
y
p
ressin
g
ENTER.
(
If the code function has been selected, a code must also be entered
)
.
Alarm messa
g
e Cause Remed
y
Standb
y
mode Re
g
ulation has sto
pp
ed The function switch
(
Main Switch
)
is either in
p
osition
"Controller sto
pp
ed" or "Service"
(
See 2:02:01
)
Check clock Power failure After
p
ower failure, timer must be set.
settin
g
s NB! If Network = ON, resettin
g
will take
p
lace automaticall
y
from
the
g
atewa
y
Max. Def. Time Max. defrostin
g
p
eriod exceeded Defrostin
g
finished accordin
g
to time not as selected
(
)
exceeded
(
section A or B
)
accordin
g
to tem
p
erature
SXXX Sensor erro
r
Check sensor connection / sensor resistance
Sensor Erro
r
High Sx () Too high air temperature
S3, S4, S5
Low Sx ( ) Too low air temperature
S3, S4, S5
Wrong Signal on Wrong defrost demand Active defrost signal on terminal 106-107 contrary to just finished
Def Start inp defrosting
AKC 121A Version 2.2x Menu operation RC.1M.A4.02 © Danfoss 06/2002 19
Communications / messages from AKA 21
Message not sent There is no contact between Check the data communication system
control panel and a controlle
r
Regulator message - ll - Check the data communication system
not received
No node - ll - Check the data communication system
(There is no gateway on the data communication system)
Initialisation erro
r
- ll - Check the data communication system
(There is a gateway on the data communication system)
The message may be removed, if you disconnect AKA 21 briefly
Message not Temporary communication Wait, or if it is a newly started system, check the setup of the data
understood problem or wrong setup communication system
Dansett supervising Pause function When you push a key, the display disappears.
Supervising Lack of contact to a controlle
r
Check the data communication system
no answe
r
AKC AKA 21 had been disconnected Wait. The message disappears on its own after three minutes.
Occupied for a brief period
20 Menu operation RC.1M.A4.02 © Danfoss 06/2002 AKC 121A Version 2.2x
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
already on order provided that such alternations can be made without subsequential changes being necessary in specifications already agreed.
All trademarks in this material are property of the respecitve companies. Danfoss and Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
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Danfoss Controller type AKC 121A. Vers. 2.2x. AKA 21 Installation guide
- Category
- Thermostats
- Type
- Installation guide
Danfoss Controller type AKC 121A. Vers. 2.2x. AKA 21 is a versatile refrigeration control system designed for precise temperature management in various applications. With its user-friendly interface via the AKA 21 control panel, you can easily monitor and adjust settings for individual refrigeration appliances or cold rooms.
Key features include:
-
Multi-unit Connectivity: Connect and operate up to 125 controllers within a single network, allowing for centralized control and monitoring of multiple refrigeration systems.
-
Alarm Management: Receive real-time alerts and error notifications directly on the control panel display. Easily acknowledge and clear alarms to maintain efficient operation.
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Danfoss Controller type AKC 121A. Vers. 2.3x. AKA 21 Installation guide
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