Microcool
Menu Description
LL01-303 (Issue C) 12.08.98
RC.8A.X2.02 15-05-2003
Controller for controlling Electronic Expansion Valve type AKV on
evaporators in Display cases and Cold rooms.
Code Number : P84-053 With S1 temperature sensor.
Software version 1.30
RC.8A.X2.02 05-2003
RC.8A.X2.02
Danfoss endeavours to ensure that this publication is correct and up to date. However, development of
systems and services is continuous and published information may not be up to date.
Danfoss accepts no liability for any error or omission.
0LFURFRRO$.&%
0HQX'HVFULSWLRQ
Reference number: LL01-303 (Issue C) 12.08.98 = RC.8A.X1.02 10-2001
Date of Issue: 08/98
At the end of 2001 the controller obtained the type designation: AKC 114B.
After this date this User Guide comprises both Microcool and AKC 114B.
After this date Danfoss undertakes all service on the controller.
Copyright © Danfoss / Woodley Electronics, The Quadrangle, Grove Technology Park, Wantage, Oxon.
OX12 9FA.
This document must not be reproduced or copied in whole or part without the prior written consent of
Danfoss.
Comments on this publication are welcome and should be sent to:
Danfoss A/S
RC-ET
Nordborgvej 81
DK-6430 Nordborg
Contents
LL01-303 (Issue C) 12.08.98 / RC8AX202 05-2003 Page iii
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Page
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1.1 System Overview 1
2SHUDWLRQ 2
2.1 Introduction 2
2.2 Access to all Functions 2
2.3 Select a Controller 2
2.4 Setting up a Controller 3
2.5 Access to a Controller 3
2.6 Help Text 4
2.7 How to Localise an Error 4
2.8 Functions of a Controller 4
2.9 F1 Key 5
2.10 F2 Key 6
2.11 F3 Key 7
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(UURU0HVVDJHV 22
Error Log 22
Communications Messages from AKA 21 24
Software History
Page iv LL01-303 (Issue C) 12.08.98 / RC8AX202 05-2003
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Original software fitted to the first batch of controllers supplied
between March 1996 and July 1996 (approx. 800 off).
Problem when used in a Coldroom panel that uses the Rail Heat
output as a Gas Alarm output. Every time the unit goes into defrost
it initiated the Gas Alarm.
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Fitted to Coldroom panels to overcome the problem with the Gas
Alarm. Supplied in 2
nd
batch of controllers supplied August to
October 1996 (approx. 500 off).
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This version of software is to cater for the Marks and Spencer
requirement of 3 temperature bands and 2 slugged probes.
The Keyswitch fitted to the display is used to select Ambient (No
Coolin
g
), Yellow Band (Day Settin
g
s) and Red Band (Ni
g
ht Settin
g
s).
A second set of Alarm Set Points have been added that are also
selected by the Keyswitch.
To enable this mode the Display setting should be 5 and the Day /
Night option set to 3. In addition, the Day / Night Control
Temperatures have to be set along with the alarm settings.
This version is fitted to all controllers fitted on M & S sites from
September 1996 and to all controllers from October 1996 onwards.
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Melt Function visible via setting module AKA 21.
Introduction
LL01-303 (Issue C) 12.08.98 / RC8AX202 05-2003 Page 1
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6\VWHP2YHUYLHZ
A refrigeration system fitted with Microcool controls will usually consist of several
controllers where each controller will regulate its own refrigeration Display case or
Coldroom.
The system has been designed in such a way that contact can be established with
each and every controller via a data communication system. One specific controller
is selected via the handset type AKA21. Once selected it is possible to display
readings or make changes to the control parameters providing the passcode is
entered.
Operation
Page 2 LL01-303 (Issue C) 12.08.98 / RC8AX202 05-2003
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The individual controllers can be accessed in two ways:
1. With the AKA 21 hand setting unit. This
Document describes this mode of operation.
2. Via the Woodley MK 5. See separate manual
for this mode of operation
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The access to the functions may be protected with a passcode ( code 2). If the
passcode is required key it in as follows:
• Push the “key” key
• Enter the passcode with the “+”, “-“ and “Digit” keys
• Push “ Enter “ key
• Push “ left “ key
Move to the required function by pressing the four arrow keys as required
If you wish to exit from the passcode function press “clear” then “left” keys.
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All controllers that are connected to the same network can be accessed with the
AKA21 Hand setting unit. There can be up to 125 controllers on any one network.
They are shown in groups of 16 on the display.
1 < 1 > 16
AEAAAAAAAAEEgg A
A system is shown here which consists of more than 16 controllers. The meaning of
the letters, is as follows:
A: AKC controller
E: Controller with active ERROR (on addresses 2, 11 & 12)
g: Gateway (to addresses13 and 14)
G: Gateway with connected printer
: A blank field indicates there is no unit with this address
Operation
LL01-303 (Issue C) 12.08.98 / RC8AX202 05-2003 Page 3
1 < 4 > 16
AEAAAAAAAAEEgg A
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.
17 < 17 > 32
AAA
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 “→”
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When a controller has been selected, you can make changes to the settings .
Changing the settings can be performed, as follows:
5 ON
-50 to +50 5 OFF/ON ON
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”. The new value will then move to the
top line.
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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:
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1. Push F1 Display of alarms
2. Push F2 Reading of selected temperatures, change of
temperature in the refrigeration appliance, start
of defrost etc.
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 or Mk 5
there is access to additional functions in the
controller).
Operation
Page 4 LL01-303 (Issue C) 12.08.98 / RC8AX202 05-2003
+HOS7H[W
Help text is attached to the individual displays. When a function is displayed in the
hand setting unit display, the help text can be obtained by pushing the “Help” key.
The help text is intended as a aid to users who no longer need to use these
operating instructions.
In the menu list attached, functions with help text available are identified with the
word “Help” next to the function.
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When an error appears in a system, it can be seen on the control panel’s display
which will show an “E”. If the hand setting unit shows text from a selected controller,
the LED on the hand set next to “Alarm” will flash.
1 < 2 > 16 MCOOL Adr: 2
AEAAAAAAAAAAgg A E Mon-11:27
High air temp
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 this document there is a list of the error messages and a description of
how to acknowledge an alarm.
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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.
MCOOL 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 of the units measured values - push “F2”
3. Display and setting of several selected functions - push “F3”
The function may be protected with a code (code 1)
Operation
LL01-303 (Issue C) 12.08.98 / RC8AX202 05-2003 Page 5
4. Display and setting of all allowed functions in the controller. The function
may be protected with a code (code 2)
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When you push the “F1” key the alarm message from the controller in question will
appear. Only active alarms are shown.
With a push of the “ Down “ key you can see whether there are any more alarm
messages, and if so , the detail.
When an alarm has been localised and corrected, the alarm is acknowledged
(removed from the system). In large systems where a gateway is connected to the
bus the alarms will automatically be acknowledged and logged.
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.
Operation
Page 6 LL01-303 (Issue C) 12.08.98 / RC8AX202 05-2003
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When you press the “ F2” key a number of functions will appear where it is possible
to read the systems measured values.
You can move between individual measured values by pressing the “up” or “ down”
keys.
To °C Calculated evaporator temperature
6:01:01 when AKS 32R is “ON”
Po bar Evaporator pressure
6:01:02 when AKS 32R is “ON”
S1
°C Refrigerant temperature at evaporator
6:01:03 inlet.
S2
°C Refrigerant temperature at evaporator
6:01:04 outlet.
S2 - S1
°K Evaporator superheat.
3:01:02
S3
°C Air temperature on to the evaporator.
6:01:05
S4
°C Air temperature out of the evaporator 6:01:06
S5
°C Temperature at S5 sensor
6:01:07 location can vary.
S6
°C Temperature at S6 sensor
6:01:08 location can vary.
Ther.Air Actual air temperature used for control.
4:01:02
AlarmAir Actual air temperature used for alarm.
4:01:01
AKV OD% Actual valve opening degree.
3:01:04
Reg Cond. See details on page 9.
3:01:01
CutOut
°C Control cut out value.
4:01:07
Cutin
°C Control cut in value.
4:01:08
Operation
LL01-303 (Issue C) 12.08.98 / RC8AX202 05-2003 Page 7
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When you press the “ F3” key a number of functions will appear
These functions are the ones that have to be set up to enable the controller to
operate correctly. Depending upon set-up you may be required to enter the
passcode prior to modifying the settings.
CutOut Setting for control cut out.
4:02:05 1RWH: Must be set.
Diff. k Thermostat differential.
4:02:06
Ther. Sx 1 = S3 used for thermostat.
4:02:02 2 = S4 used for thermostat.
3 = Weighted average of S3 & S4.
AKV / TEV Valve selection
3:02:01
Def. Stop Sx Select Def. Termination sensor
5:05:03
DI 1 input 1 = DI 1 used to initiate defrost.
4:09:01 2 = DI 1 used as a door status input.
Temp/Time 1 = Defrost stop on temperature.
5:03:01 2 = Defrost stop on time.
Fan run Fan operation during defrost
5:02:04
MaxDefTime Maximum defrost time allowed.
5:03:02
Def.Stop
°C Termination temperature.
4:01:01
inj.Del m Liquid injection delay time.
5:04:01
FanOnDel m Maximum fan start delay after defrost.
5:04:02
Fan On
°C Temperature at which the fan starts
5:04:03 after a defrost.
Menu Listing
Page 8 LL01-303 (Issue C) 12.0.98 / RC8AX202 05-2003
0HQX/LVWLQJ
The following pages detail the system menu layout along with a brief description of
the functions.
Level 1 Level 2 Level 3 Level 4
Description
M.Cool Adr: xxx
Controller type and address
Mon hh:mm
If the passcode is set, continue by pushing the
"key" key.
Enter Code
Enter passcode 1 or passcode 2 (cf. also 1:07 and
1:08).
0 - 255 0
Continue by pushing "arrow left" button
1:01
M Cool Adr: xxx
Access to system information
Mon hh:mm
If an E appears in the display, an error has been
registered.
1
Code No.
The controller’s code no. and software version.
Prog. Ver.
1:20
|
Clock:
Set controller clock (Microcool clock)
Mon hh:mm
1:03
Clock: Day.
Set day (1 = Monday, 7 = Sunday)
Mon(1) Sun(7)
1:03:01
|
Clock: Hour
Set hours
0 - 23
1:03:02
|
Clock: Min.
Set minutes
0 - 59
1:03:03
|
System Address
The controller’s system address
Addr. yyy xxx
yyy=network no. and xxx=address.
1:04
Note; The system address can only be set via PC
|
Alarm report to
Alarm address (end receiver)destination, where the
alarms are sent
Addr. yyy xxx
1:05
Note: The alarm address can only be set via PC.
|
Menu Listing
LL01-303 (Issue C) 12.08.98 / RC8AX202 05-2003 Page 9
Gateway
Address
alarms (see 1:05)
xxx
1:06
Note; The address can only be set via PC
|
Chg. Code1
40
active alarms by means of the F1 key.
0 - 255
40
1:07
Also access to the selected settings via the F3 key.
|
(Factory setting = 40) (See also code 2)
Chg. Code2 0
Change passcode 2. This code gives access to the
whole menu system
0 - 255 0
1:08
(Factory setting = 0. Setting = 0 offers free access
where neither code 1 not code 2 is required)
|
Main Function
Main function
2
Main Function
Access to the main switch
Settings
2:01
Main Switch 0
Main switch: 1: Regulation ( Microcool running )
-1 / 0 / 1 0 Help
0: Controller stop
2:01:01
-1: Service mode
|
Language 0
Selection of language.
0 - 2 0 Help
0: English 1: German 2: French
2:01:02
S1 / AKS32R
1
Select temperature or pressure sensor to measure
1 2 1
the evaporating temperature.
2:01:03
|
Injection
Control
3
Injection
Display measured values.
Measurements
3:01
Reg Cond.
Regulating condition
3:01:01 Help
0: No cooling 5: Start after defrost
1: Start 6: Forced closing
2: Adaptive reg. 7: Regulation problems
3: Start 8: Emergency cooling (sensor
failure)
4: Defrosting 9: Modulating thermostat regulation
Menu Listing
Page 10 LL01-303 (Issue C) 12.0.98 / RC8AX202 05-2003
|
S2-S1 K
Evaporator superheat measured with S1 and S2
sensors
3:01:02
|
SH Ref K
Actual superheat reference of the regulation
3:01:03
|
AKV OD %
Actual valve opening degree
3:01:04
|
S1 °C
Refrigerant temperature at evaporator inlet.
3:01:05
|
S2 °C
Refrigerant temperature at evaporator outlet.
3:01:06
|
Expansion valve
Select expansion valve
select
3:02
AKV / TEV 1
0: Expansion valve OFF
0 - 2 1 Help
1: AKV valve used.( Terminal 14 - 15 ).
3:02:01
2: TEV valve used. ( Terminal 18 - 19 ).
|
Controller
Setting
4
Thermostat
Display measured values relating to thermostat
function.
Measurements
4:01
AlarmAir
Actual air temperature for the alarm function.
4:01:01
|
Ther.Air
Actual air temperature for the control function.
4:01:02
|
S3 °C
Air temperature at evaporator inlet.
4:01:03
|
S4 °C
Air temperature at evaporator outlet.
4:01:04
|
S5 °C
S5 temperature.
4:01:05
|
Menu Listing
LL01-303 (Issue C) 12.08.98 / RC8AX202 05-2003 Page 11
S6 °C
S6 temperature.
4:01:06
If S6 is used as ON/OFF inlet **** is shown.
|
CutOut °C
Actual thermostat cut-out value
4:01:07
|
CutIn °C
Actual thermostat cut-in value
4:01:08
|
RunTime
Actual thermostat cut-in time in minutes
4:01:09
or duration of the last finished cut-in.
|
Thermostat Ctrl.
Settings for thermostat function
Settings
4:02
Ther. Mode 1
Definition of thermostat function
0 - 2 1 Help
0: No thermostat function
4:02:01
1: Thermostat control.
2: Modulating temperature regulation
|
Ther. Sx 2
Definition of thermostat sensor(s)
1 - 3 2 Help
1: S3 sensor is used
4:02:02
2: S4 sensor is used
3: Weighted value of S3 and S4 is used (CPT)
S4 Day % 100
S4 weighting by day
0 - 100 100
S3 is automatically weighted. Must only be set if
"Ther.Sx" = 3
4:02:03
S4 Night % 100
S4 weighting at night
0 - 100
100
S3 is automatically weighted
4:02:04
|
CutOut °C
2.0
Setting of thermostat cut-out value
-50 50
2.0
MUST BE SET. Even if the thermostat function has
not been selected.
4:02:05
(The value is used by the injection function).
|
Diff. K 2.0
Setting of thermostat differential
0.5 10 2.0
4:02:06
Menu Listing
Page 12 LL01-303 (Issue C) 12.0.98 / RC8AX202 05-2003
|
Day/Night Ctrl.
Settings of day/night function
Settings
4:03
Day/Night 0
Choose day-/night operation function
0 3 0 Help
0: No night setback.
4:03:01
1: Change between day and night operation
according to signal on S6 input
2: Change between day and night operation
according to internal time clock
.
|
3: Change via key switch. Only if display option set
to 5
Dt Night K 0
-25 25 0
Night set back value
4:03:02
|
Mo day h 6
Time table for day and night operation on Mondays
0 24 6
End of night setback
4:03:03
At setting = 0 there is no night setback this day
|
Mo night h 6
Time table continued:
0 24 6
Start (of night setback)
4:03:04
At setting = 0 there is no displacement this day
If day and night settings are identical,
or if night is set before day the function will be
changed.
Same for:
See functional description
Tu-We-Fr
Sa-Su
|
Air Temp. Alarm
Settings for alarm function
Settings
4:04
Alarm Mode 3
Definition of alarm thermostat
0 - 3 3 Help
0: No alarm thermostat
4:04:01
1: S3 used as alarm sensor.
2: S4 used as alarm sensor.
3: Calculated Product Temperature (CPT).
|
S4Al Day%
50
S4 weighting by day.
0 - 100 50
S3 is automatically weighted.
4:04:02
|
S4AlNight%
50
S4 weighting at night.
0 - 100 50
S3 is automatically weighted.
4:04:03
Menu Listing
LL01-303 (Issue C) 12.08.98 / RC8AX202 05-2003 Page 13
|
S4MinLim °C -
5
Setting of low S4 temperature alarm limit.
-50 50 -5 Help
Only active when Alarm Mode = 3.
4:04:04
AKV is closed
|
High Lim °C 5
High air temperature alarm limit (absolute value) -
Day.
-50 50 5
4:04:05
|
Nt Hi Lim
High air temperature alarm limit - Night.
-50 50 5
4:04:06
|
High1Del m 120
Time delay of high air temperature alarm during
pull-down.
0 - 240 120 Help
This value will apply until the actual air temperature
has dropped below the "upper alarm limit".
4:04:07
Thereafter shift to the time delay "High2Del m".
|
High2Del m
30
Time delay of high air temperature alarm during
normal regulation.
0 - 60 30 Help
4:04:08
|
Low Lim °C -30
Low air temperature alarm limit (absolute value) -
Day.
-50 50 -30
AKV does not close when coming below limit.
4:04:09
|
Nt Low Lim
Low air temperature alarm limit - Night.
-50 50 -30
4:04:10
|
Low Del m 30
Time delay for low air temperature alarm
0 - 60 30
4:04:11
|
Display Setting
Settings for temperature display
4:05
Disp. ctrl. 2
Select display option
0 - 5 2 Help
0: OFF
4:05:01
1: S3
2: S4
Menu Listing
Page 14 LL01-303 (Issue C) 12.0.98 / RC8AX202 05-2003
3: CPT. Calculate Product Temperature.
4: Scroll (Tesco option)
5: Dual temp mode via keyswitch.
|
Fan Pulsing
Setting of fan pulsing during night operation
(CutOut Night)
4:06
Fan On %
100
Setting of the fans’ ON period in percent of the
"FanCycl m" time(the function is only active in the
0 100 100
cut-out period during night operation).
4:06:01
|
FanCycl m
1.0
Period time for total ON / OFF time
0.0 - 60.0 1.0
4:06:02
|
Railheat Pulsing
Settings for railheat function
(Day/Night)
4:07
RailOnDay %
100
During day operation: Setting of rail heat ON period
in
percent of the "RailCycl m" time.
0 - 100 100
4:07:01
|
RailOnNgt %
100
During night operation: Setting of rail heat ON
period
in percent
0 - 100 100
4:07:02
|
RailCycl m 10
Period time for total ON / OFF time
0 - 60 10
4:07:03
|
Light Control
Set-up of light control.
Local / Remote
4:08
RemoteCtrl
OFF
Measurement showing status on the remote switch.
Set via PC or MK 5
4:08:01
Light Ctrl 1
1: Light is synchronised with the day/night operation
1 - 2 1 Help
in Microcool.
4:08:02
2: Light is controlled remote via Mk 5
NB! Light status can be monitored from Service
Mode.
Menu Listing
LL01-303 (Issue C) 12.08.98 / RC8AX202 05-2003 Page 15
|
DI 1 input
Defrost or Door
Configuration of DI 1 220Vac input.
4:09
DI 1 input 1
1: DI input used to initiate defrost via an external
signal.
1 - 2 1 Help
2: DI input connected to a door-switch
4:09:01
|
DoorOutCtr 0
0: No action when door-switch is activated.
0 - 1 0 Help
1: Fan and AKV are stopped and Light goes on
when
door- switch is activated.
4:09:02
|
SafetyTime 60
Delay time when door-switch is activated until
normal
0 - 120 60
operation starts again. Door alarm at time out.
4:09:03
|
Output Ctrl. at
Definition of controller outputs at forced control
signal
Forced Closing
4:10
Forced Cl. 2
1: ON-inlet ( Terminal 32 and 33) is used.
1 - 2 2 Help
2: Remote control of Forced closing, via the
PC-parameter in Micro Cool. ( FCl Remote.).
4:10:01
(FCI remote is reset by switching from 2 to 1.)
Output functions when there is forced control
OutputCtrl 1
1: Fan outlet is ON
1 - 3 1 Help
2: Fan outlet is OFF
4:10:02
3: All outlets are OFF and alarm thermostat function
is
stopped.
|
Safety Function
Settings for fan stop function
Fan Stop by S5
4:11
FanStopS5
OFF
Fan stop function defines ON or OFF
OFF/ON OFF Help
4:11:01
|
FanStop °C
Temperature limit for fan stop (the fans are stopped
when the S5 temperature is higher than this value.
-50 - 50
The fans will start again when S5 is lower than
4:11:02
"FanStop °C" - 2K)
|
Extended Inject.
Extended settings for injection function
Ctrl. Settings
4:12
Glide K
0.0
Temperature displacement for refrigerant. Is only
set in systems with zeotropic refrigerants.
Menu Listing
Page 16 LL01-303 (Issue C) 12.0.98 / RC8AX202 05-2003
0.0 - 10.0
0.0
4:12:01
|
SH Max K
12.0
Max. superheat reference value
3.0 - 15.0
12.0
4:12:02
|
SH Min K
3.0
Min. superheat reference value
3.0 - 10.0
3.0
4:12:03
|
MOP Ctrl.
Choose MOP function ON/OFF
OFF/ON
4:12:04
|
MOP °C
MOP start temperature
-15 - 15
4:12:05
Melt Function
Settings for melt function
Settings
4:13
MeltInterv 60
Time between melt periods in minutes.
0 – 600 60
The melt function is off, when MeltInterv = 0
4:13:01
|
Melt Period 5
Length of melt period (Injection stopped) in minutes.
0 - 10 5
The Melt function is off, when MeltPeriod = 0.
4:13:02
Defrost Control
Defrost function
5
Defrost
Display of measured values relating to defrost
function
Measurements
5:01
Def Sensor
Defrost sensor temperature defined as DefStop Sx.
5:01:01
Can be S1, S2, S3, S4 or S5
|
DefTime m
Actual defrost cut-in time or duration of the latest
finished defrosting period.
5:01:02
|
MDefTime m
Average value of the latest 4 defrosting periods.
5:01:03 Help
|
AccDefSkip
Total number of skipped defrosts since start or
reset.
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