Cool Expert MIC QKL mini 2 User manual

Installation and operating manual
Cooling controls from Cool Expert have the highest internationally
recognized level of automation. The MIC QKL mini cooling control is the
product of consistent further development of the KÜBATRON QKL 2B/T
multifunction control, which also originated from the innovative genius of
Cool Expert. The MIC QKL mini 2 is the ideal solution for all your needs in
commercial refrigeration. The mini is particularly impressive in its easy
operation and versatility of use in chest refrigerators and freezers as well as
in cold rooms and freezer rooms. The MIC QKL mini 2 is a self-optimizing
control with autoadaptive defrost detection at the best time in terms of
energy. If the line for the temperature sensors is extended, compensation of
the resistance is done automatically by means of the three-wire
measurement technique even over longer distances. All setting and
adjustment work can basically be dispensed with. A refrigeration system
equipped with MIC QKL mini 2 is permanently controlled and monitored by a
knowledge-based algorithm without any interruption. The algorithm detects
changes in the operating conditions and guides the currently most efficient
operating point. The potential energy savings using a MIC QKL mini 2 have
been proven to be at least 20%, compared to state-of-the-art technology.
Room temperature control:
The MIC QKL mini 2 is suitable for control with one or two sensors, depending on
the application. With only one temperature sensor in the cooler block as the sole
reference variable, MIC QKL mini 2 performs the same tasks as its predecessor
KÜBATRON QKL 2 B/T. Dual sensor control, combined with the optional network
module and a recorder, complies with the hygiene regulation for quality assurance
of chilled goods according to HACCP (detection of room temperature using a
proprietary sensor provided for that purpose). The dual sensor control is also
essential in refrigerated cabinets and in the case of recirculating air defrosting.
Air cooler fan management:
Prior to beginning the actual cooling process, the energy stored in the cooling
block (by the formation of frost and ice) is supplied to the cold room by specifically
forerunning the fan. This air cooler fan control patented by Cool Expert also
became known under the name latent heating. Frost and ice formation on the fins
of the air cooler are reduced by the effect of sublimation. The defrosting processes
are, compared to state-of-the-art technology, reduced considerably. Another
benefit of the sublimation effect lies in the fact that the goods that are chilled lose
less moisture. The relative air humidity is increased by at least 10%. In order to
prevent water drops from breaking away, the start of the cooler fan is time-delayed
after each defrosting process.
Rev2.r19.x.38-1.2a-en
Defrost detection:
!Adaptive Dynamic Detection (ADD) The defrost detection takes place at the best
time in terms of energy according to the performance measurement principle.
Two sensors (air inlet and cooler block temperature) are required for ADD. A
defrost process is automatically initiated if the cooler experiences a reduction in
performance of more than 5% due to frost and ice formation.
!Load Integral Detection (LID) Defrost detection takes place here similar to the
ADD procedure described above; however, it takes into account the expected
average humidity level. In the case of the one-sensor control only LID defrost
detection is possible. LID can also be used for the dual sensor control.
Defrost management:
Apatented autoadaptive defrost management controls the electric defrost heating,
the recirculating air defrosting and the hot gas defrosting. The defrost end
temperature is calculated autoadaptively. The heat content of the given defrosting
medium is the basis for calculating the defrost end temperature. Drain down time
is mandatory after the defrost process has been completed. The defrost end
temperature can also be set by hand for electric defrosting.
Fault management:
An autoadaptive early warning system monitors the performance of the coolers
and constantly checks the availability of the refrigeration system. A message
follows in the event of a fault. Up to 14 faults and two messages can be
documented in a unique diagnostic system.
Two freely configurable digital inputs can be connected for various tasks:
Adjustable switch-off time and switch-on temperature of the cooling plant when
the door is open, adjustable increase or decrease of the setpoint with or without
defrost suppression, external defrost suppression or external defrost request,
external standby in case of load throw-off, cooling request or if the defrost locking
mechanism is in effect, for example.
Communication:
Optional network module as a communication interface for data transmission in
both directions.
For the benefit of the customer
In harmony with the environment
Temperature control
MIC QKL mini 2
Cool Expert
Entwicklungs GmbH
Besenacker 14
D-35108 Allendorf (Eder)
Phone [phone]
Fax [phone]
e-mail [email protected]
Internet www.cool-expert.de
Management Information Control (MIC)
Cooling system intelligence
1

Safety and work instructions
General safety instructions:
Electrical installation
Prior to beginning all work on the MIC QKL mini 2 control, disconnect the device
from the mains and secure it from switching on again inadvertently!
As a matter of principle, electrical installations are to be carried out by authorized
specialist companies only. The VDE 0100/0700 and DIN 8975 Part 7.33 as well as
the regulations of the local electricity supplier and all other safety and protection
regulations, including the performance specifications of the components
connected, must be observed.
A separator with a contact opening width of at least 3 mm / 0.12 in must be fitted at
each pole (main and service switch).
Following the appropriate electrical installation or inspection work, the safety
measures must be checked according to the applicable guidelines.
For use in potentially explosive rooms, the applicable guidelines for this must be
observed. The MIC QKL mini 2 control must be installed outside potentially
explosive areas.
For electric defrosting, a safety temperature limiter has to be provided for
switching off the defrost heating in the irregular case.
General instructions and information on working with the MIC QKL mini 2
The MIC QKL mini 2 works as a self-optimizing multifunction control which saves
and evaluates data gathered from its sensors. All functions originating from the
MIC QKL mini 2, such as cooling request, air cooler fan management and defrost,
must be executed and ended by the control without any restrictions. The above-
mentioned functions must neither be bridged nor interrupted by components from
other manufacturers. Interruptions to the control functions listed above are
assessed by the MIC QKLmini 2 as a fault.
Cool Expert shall not under any circumstances assume liability or responsibility
for damage resulting from improper installation or use of the control or
accessories.
Functional warranty only in connection with sensors from Cool Expert (MIC
Sensor Pt1000).
Appropriate safety devices, which switch off the system components connected to
the control in the event of a fault, have to be provided.
Never attempt to open or repair the MIC QKLmini 2 control.
Observe the local and national standards and regulations when installing the MIC
QKLmini 2 control.
The MIC QKL mini 2 is supplied with a protective low-voltage of 24 V AC/DC. The
transformer required for this must comply with EN 61558-2-6 or EN 61558-1.
Work instructions:
Installation and connection
Housing and dimensions:
Mounting Front panel installation with tension frame
Cut-out size 71x29 mm 72.8x1.14 in (for front panel installation)
Protection rating according to EN60529 : Front IP 65 (fitted),
housing IP 20
Protection rating lP65
The user interface of the control in the outside area of the door is designed for
protection rating IP 65. The rest of the housing complies with the provisions of IP
20. To assure the protection rating of the control in the outside area of the door, the
cutout must be made to fit precisely for the purpose of fitting it into the control
cabinet door. The cut-out must be fully deburred. The plastic housing must not be
deformed from an incorrectly made cutout. The door surface must be flat and have
no unevenness. The wall thickness of the door should be at least 0.75 mm / 0.03 in.
Prior to fitting the control, check that the seal between the installation frame and
control cabinet door is inserted without any twisting. The tension frame pulls the
control evenly from the inner side of the door against the outer side of the door with
the necessary initial tension and fastens it.
When fitting the control, make sure that there is secure isolation from the other
modules in the control cabinet (according to VDE 0106, Part 101).
Installation instructions:
10,50
7
5
28
34
50
70
3
75
59
16
The control is not limited to certain heat transfer media and can be used in direct
expansion, CO , pump operation, NH and dual-circuit refrigeration systems.
23
Emergency programs provided in the control protect valuable chilled goods in the
event of a fault. Even in the case of total failure of both sensors, an emergency
running function for the cooler fan and cooling request is maintained depending on
the setpoint temperature.
One MIC QKL mini 2 control and a maximum of three air coolers
For smaller refrigeration systems with an overall refrigerating capacity of up to 6
kW, a maximum of three air coolers installed in one room can also be operated in
parallel with one MIC QKL mini 2 multifunction control. In the case of electric
defrosting, all the coolers have to be equipped with a safety temperature limiter.
Requirement for correct defrost detection
The MIC QKL mini 2 can only initiate a defrost process at the best time in terms of
energy if the cooling process begins immediately after its cooling request and is
also ended again by the MIC QKL mini 2. An incorrectly set vacuum or
overpressure switch results in problems in defrost detection. The cooling process
may be interrupted by the safety chain (vacuum or overpressure switch, etc.) only
in the event of a fault.
Exceeding of the maximum defrost time
If the maximum defrost time of one hour is exceeded in the event of a fault and the
calculated defrost end temperature is not reached, the control will switch to
cooling request and proceed ist regular control function.
Defrost suppression
It is possible to suppress the defrost processes via the digital inputs. After
cancelling the defrost suppression, the next defrost process can be carried out
after a minimum of 60 min. has elapsed.
Power supply and data memory
The data memory of the MIC QKL mini 2 is deleted every time there is a power
failure. When power is restored, the control begins a restart with error diagnostics.
Please make sure that there are no interruptions in the power supply and that the
control is not switched off by external switches, e.g. manual control switches for
stoppage. Frequent interruptions to the power supply result in ice build-up on the
air cooler.
Important! Please observe!
Uncontrolled intrusion of warm air through openings in the wall, ceiling, floor or
drains must be avoided in refrigerated units. Therefore, condensate drains must
be equipped with a siphon and additionally heated when operating at sub-zero
temperatures.
Positioning of the sensors TL1 and TBL
See installation manual "MIC Sensor Pt1000".
dimensions in mm
Technical Specifications
Setpoint temperature -50 to 50 °C / -58 to 121 °F, in increments of
adjusting range 0.1 K/0.5 °R
Switching hysteresis ± 0.5 K / 0.9 °R adaptive from setpoint
Control accuracy ± 0.3 K / 0.7 °R from setpoint
Supply voltage 24 V ± 20 % AC/DC 3 VA
Ambient temperatures in storage -50 to 70 °C / -58 to 158 °F
during transport -50 to 70 °C / -58 to 158 °F
in operation -20 to 55 °C / - 4 to 131 °F
LED display 7- segment display with 7 function messages
Measuring range -60 °C / -76 °F to 60 °C / 140 °F
Resolution 0,1 K / 0,5 °R
Sensors 2 x MIC Sensor Pt1000 for three-wire
measurement technique
EMV Specification for industrial use according to EN50081-1 and
EN50082-1
Software class Class A
Outputs 4 relay outputs, 3 NO contact, 1 changeover switch,
max. switching capacity 8(3) A 250 V AC
Inputs 2 digital inputs, contact current > 2 mA, shading
only by means of potential-free contacts
Protection class II when installed properly
Connecting terminals terminal screws with lifting system 4 mm²
Communication Optional network module
2

Display and control elements
LED operating status display
Fault display
LED off: Fault relay “Off“
LED flashes: Fault relay “On“
LED illuminated: Fault confirmed but not cleared (fault relay “Off”)
Cooling request
LED off: Cooling relay "Off"
LED illuminated: Cooling relay "On"
Cooler fan
LED off: Fan relay "Off"
LED illuminated: Fan relay "On"
Defrost request
LED off: Defrost relay "Off"
LED illuminated: Defrost relay "On"
LED flashes: On hold (defrost relay “Off”)
Entry status
LED off: When moving through the menu
LED illuminated: When a menu item is open and the setting is
displayed
LED flashes: When a menu item's setting is changed
Operating state for digital input 1
LED illuminated: Floating contact at terminal 1 and 2 closed
Operating state for digital input 2
LED illuminated: Floating contact at terminal 1 and 3 closed
Control button 1
Move upwards in the menu or increase the value
Control button 2
Move downwards in the menu or decrease the value
Handling and operation
The control is operated using two buttons. The control is set on three main
operating levels: the user level, the configuration level and the statistic level.
Within the operating levels, the menu items are shown in the display using
abbreviations. The menu items are selected by pressing the control buttons. A
selected menu item will show its setting alternately after 5 sec. To change to the
other operating level, set the appropriate menu item and press both buttons at the
same time.
To make a setting or a change, the selected menu item must be opened by
pressing both buttons at the same time. The "Entry Status" LED lights up and the
current setting is displayed. Pressing the control buttons allows a setting or
change to be made within one of the opened menu items.
A deviation from the last saved setting is shown when the "Entry Status" LED
flashes. Pressing both buttons at the same time closes and saves the changed
menu item. The "Entry Status" LED is switched off, thus confirming that the setting
has been correctly completed. After 5 sec. the new setting is shown alternately
with its menu item.After changing from operating level "-2-" or "-3-" to operating
level "-I-", the room temperature "tL1" is automatically shown.
Note:
If an open menu item remains unclosed, it will close automatically after 5 minutes.
The last saved setting remains unchanged. You are automatically taken back to
operating level "-I-" to the display of the room temperature "tL1".
Starting operation
:888
cE3
r19
°C
: 0.5 The room temperature is displayed
after initialization
!
=
§
$
%
&
/
>
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Control buttons
Note:
Alerts detected by the control also remain stored, even in the event of a power
failure, and are displayed again when power is restored (fault display LED, alert
and buzzer).Alerts can only be deleted under the menu item "ALt" with "cLr".
If the Power fail control "PFC" is set to "On", thus switched on, the alert “PFL” is
displayed when power is restored.
LED function test
Device name
Control version
Display of the configured temperature scale
Configured temperature scale is displayed for a short time
("°C" or "°F")
Normal operation after initialization
Initialization of the control:
The power supply of AC/DC 24 V may only be connected to the input terminals 4
and 5 provided for this purpose. Incorrect connection results in immediate
destruction of the control.
The digital inputs 1 and 2 and the input terminals 1, 2 and 3, as illustrated here,
may only be switched with floating contacts.
External voltage of any kind results in immediate destruction of the control and can
lead to fatal injury if disregarded. This also applies to the Pt 1000 sensor inputs
TL1 and TBL, terminals 6 to 10.
Electrical connection:
Line extension
(TL1, TBL) up to 2000m
TL1 TBL
IF3
Display of network module identification code
The identification code of the network module is
displayed temporarily. This message is only visible when a
network module is installed.
optional network module
.1 Control subversion
.38 Software version
3

Operating level 1
The operating level
MIC QKL mini 2
-1-
-°cool expert
tL1 : 0.5 Display of room temperature
(Standard display)
Display of room temperature
tbL : 7.3 Display of cooler block temperature
Display of block temperature
tSA : 5.0 Display of current setpoint temperature
Display of current setpoint temperature
tSr : 0.0 Setting the setpoint temperature
Value: -50 °C / -58 °F to 50 °C / 121 °F
Setpoint temperature setting
ECT OFF
On
Controller in the operating mode "Off”
Controller in the operating mode "On”
Control On / Off (Standby)
-2- cS
0
The first menu item after changing to the
configuration level (if no password is provided)
Request to enter password with a value
from 0 to 999
To the configuration level (operating level 2)
or
W
E
(Temperature tL1)
(Temperature Block)
(Temperature Setpoint Actual)
(Temperature Setpoint Reference)
(Enable Control)
W
E
Note:
If the display “-2-” flashes alternately with the display “ - 1” a password is possibly provided. The
password is entered or cancelled in the operating level "-2-" under "P__". When requested to enter
a password, enter a numerical combination and then press both control buttons at the same time.
If the wrong password is entered, the display changes immediately to the room temperature "tL1".
The password can be entered as many times as required.
-3- tH1 The first menu item after changing
to the statistics level (operating level 3)
To the Statistics Level (operating level 3)
Operating mode “Off” (OFF):
All control functions are switched off (standby). The message "UCH" refers to the standby of the
controller.
If no other entries are made, the current room temperature is displayed alternately with "UCH" after 5
minutes.
Note:
Adetailed description of the MIC QKL mini 2 alerts can be found on the last page of this document
Display of the room temperature measured by sensor TL1. The room temperature can be hidden in
operating level 2.1 under "dt ". In this case, "___"is displayed. In the event of a sensor fault "ES1",
“----" is displayed alternately with "ES1”.
See note under " tbL”
Display of the cooler block temperature measured by sensor TBL. In the event of a sensor fault “ES2"
"----" is displayed.
Information on temperature measurement " tL1" and " tbL":
The temperature is measured according to the principle of the three-wire measurement technique. In
the case of an extension of the sensor wires, the resistances are compensated for by the three-wire
measurement technique. If wire leads are missing, the sensors TL1 or TBL can also be connected
according to the principle of the two-wire measurement technique. Resistances which inevitably
distort the measurement result can be compensated in the operating level "-2.1-" under "oL1" or
under "oL2" by the entry of a correction factor.
ALT nO no alerts
Alerts
or possible alerts
(Alerts)
Alert
cLr Clearing the current alert by pressing the
control button simultaneously
current alert(s)
Note:
The setpoint value can be increased or decreased by connecting a correspondingly configured
digital input. In this case, the current setpoint temperature is displayed. After cancelling the
connection, "tSA" and "tSr" display the same value.
Note:
In the case of recirculating air defrost under "cd", "FAn" and a setpoint temperature lower than 0 °C /
32 °F, alert "EUS" is displayed
Loading the factory setting
During the starting operation of the control, keep both control
buttons pressed down permanently without interruption.
Special functions of the control buttons
It is not possible to initiate a manual defrost under the following conditions:
Standby by user ("ECt", "OFF”), standby by digital input, ("cI1" or "cI2", "Stb").
The flashing fault display LED signals that the initiation of a manual defrost is not
possible under the aforementioned conditions.
Note:
An active defrost can be cancelled with the procedure described above.
Defrost initiation (manual)
Cooling request (manual)
<
dFR
After approx. 3 seconds, the countdown shown left is counted
to zero.
COR
>Disconnect control from the supply voltage and switch it back on (initiation phase).
Keep control buttons 1 and 2 pressed down permanently without interruption until
the following routine "LFP" appears in the display.
DF5
...
CO5
...
Note:
This function can only be performed during the initiation phase after a restart.
During normal operation, the procedure shown here has no effect. It is also
possible to load the factory setting in the operating level 2 under the menu item
"rSt" "LFP".
LFP
LF5
...
After completing the initiation, the countdown shown left is
counted to zero.
The display "LFP" and an acoustic signal of the buzzer
confirm the loading of the factory setting.
The display "dFr" and an acoustic signal of the buzzer
confirm the initiation of the manual defrost.
Keep button 1 pressed down permanently without interruption
Keep button 2 pressed down permanently without interruption.
After approx. 3 seconds, the countdown shown left is counted
to zero.
The display "COr" and an acoustic signal of the buzzer
confirm the initiation of the cooling request.
It is not possible to initiate a manual cooling request under the conditions shown
below:
Standby of the control by user ("ECt", "OFF”), Standby by digital input, ("cI1" or
"cI2", "Stb"), room temperature "tL1" less than setpoint " tSA", defrost process
active.
>
<
Press button 1 permanently without interruption until “dFr” is displayed in the
following routine.
Keep button 2 pressed down permanently until “COr” is displayed in the following
routine.
The flashing fault display LED signals that the initiation of a manual cooling
request is not possible.
W
E
Factory setting (All temperature values of the factory setting are indicated in Celsius)
W
E
4

Std
W
E
Adjustable defrost period
The defrost period can be set from 5 to 50 minutes. In contrast to timed defrosting procedures, the
pre-defined defrost end temperature under "cdE" is included. The set value is a reference value. The
actual defrost period is based upon the heating output and the ice buildup of the cooler.
The controller adapts the defrost detection, taking the defrost end temperature into account, in order
to reach the set target time. This process can require several defrost cycles. If the heating output is
too low, the set value might not be reached or it might only be reached approximately.
Adaptive defrost period determination (Std)
The controller calculates the optimal defrost period adaptively from 10 to 45 minutes based on
system parameters determined by the controller. The setpoint temperature and the evaluation of
previous defrosts are essentially the basis for the calculation.
cdP 30
Std
Adjustable defrost period: 5 - 50 minutes
allowing for the defrost end temperature
Adaptive defrost period determination
Defrost period
W
E
(Config Defrost Periode)
Parameter is only valid in conjunction with “cd ”, “HGE” or “cd ”, “HGS” or “cd ”, “EL”
cFA
Std
P__
PD_
__A
P_A
PdA
Standard fan management
Fan runs permanently
Fan runs permanently,
with night cover*
Fan runs during defrost
Fan runs permanently even during
the defrost
Fan runs permanently, with night cover*,
fan is on during the defrost
Air cooler fan management
W
E
(Config Fan)
Fan runs permanently, with night cover*, fan is on during the defrost(PdA)
Fan runs permanently with additional detection of a night cover*.The fan is switched on during the
defrosting process.
Fan runs permanently even during the defrost (P_A)
Fan runs permanently even during the defrosting process.
Fan runs during the defrost (__A)
Fan runs according to the standard fan management “Std”, but also during a defrosting process.
Fan runs permanently with night cover* (Pd_)
Fan runs permanently with additional detection of a night cover *. The fan remains switched off during
the defrosting process.
* Night cover “PdA”and “Pd_”: During a load reduction within a refrigerated unit, due to a night
cover, the controller switches from permanent operation to standard operation automatically. After
cancelling a night cover, the controller switches back to permanent operation automatically. The
detection of a night cover is not possible under control mode”cS”, “SSC”.
Fan runs permanently (P__)
Fan runs permanently but not during a defrosting process.
Standard fan management (Std)
!Fan pre-run: If the room temperature increases 0.5 K / 0.9 °R above the setpoint value, the fan is first
started (without the compressor running). The fan pre-run is controlled by means of temperature.
The delay time can vary between 90 seconds and 20 minutes until the compressor starts.The length
of the forerun time depends considerably on the course of the cooler block temperature and air
intake temperature. In any case, the cooling process is initiated above the setpoint temperature at
1.5 K / 2.7 °R. During this time, residual energy of the cooler is transferred to the refrigerated unit.
The formation of ice is reduced by the effect of sublimation, the relative air humidity increased and
the next defrosting process is delayed considerably.
!Cyclic air circulation: In order to ensure even thermal stratification within the refrigerated unit, the
fan runs for 5 minutes every 15 minutes, if the room temperature is below the setpoint temperature .
!Adaptive fan start temperature: After each defrosting process, the starting temperature of the fan is
recalculated depending on the setpoint value and current room temperature in order to bind any
possible residual heat within the cooler. The fan is controlled as described previously according to
the principle of the time-delay switch, which is tracked adaptively in the event of setpoint changes
and high loads.
The menu item "cdE" has a dual function.
On the one hand, a defrost end temperature from 2 - 50 °C / 35.5 - 122 °C can be set under "cdE".The
precondition for setting the defrost end temperature is the configuration of the electric defrost "EL"
under "cd“.
On the other hand, the calculated defrost end temperature can be adjusted downwards under "cdE"
if one of the two hot gas defrost modes "HGS“ or "HGE" is configured under "cd". The adjustment is
made within the scale from 2 to 50 °C / 35.5 to 122 °F with the values from 2 to 10°C / 35.5 to 50 °F.
The cooler block temperature and the period of the defrosting process are used for calculating the
defrost end temperature. This means: hot gas with high heat content = short defrosting process with
high defrost end temperature max. = 30 °C / 86 °F. Hot gas with low heat content = long defrosting
process with low defrost end temperature min. = 10 °C / 50 °F. The correction value 10 has the least
influence on the adaptively calculated defrost end temperature. The value 2 has the greatest
influence if the adaptively calculated defrost end temperature should be adjusted downwards .
Adaptive calculation of defrost end temperature (Std)
The defrost end temperature is calculated adaptively by the controller itself. It is calculated
depending on setpoint temperature, amount of frost/ice and the power of the defrost heating.
cdE 10.0 Adjustable value: 2 - 50 °C / 35,5 - 121 °F
Adaptive calculation of defrost end
temperature
Defrost end temperature (Config Defrost Endtemperature)
Parameter is only valid in conjunction with “cd ”, “HGE” or “cd ”, “HGS” or “cd ”, “EL”
drain down time, the defrost request LED flashes. The cooling process starts when the drain down
time has finished. The start of the fan is time delayed depending on the setpoint temperature as
described in the standard fan management under “Std“.
Operating level 2
The configuration level
MIC QKL mini 2
-2-
-°cool expert
cS
SSC
dSC
dSL
Single sensor control
(Single Sens Control)
Dual sensor control adaptive
(Dual Sens Control)
Dual sensor control load integral
(Dual Sens Control LID)
Control mode (Sensors & defrost detection)
W
E
(Config Sensors)
Dual sensor control load integral (dSL)
Method for defrost detection by specifying a humidity level between 25 and 100%. (See setting under
"cSL" from 25 to 100%) In the control mode "dSL", both sensors TL1 and TBL must be connected.
Dual sensor control adaptive (dSC)
The defrost detection is carried out adaptively here, at the energetically optimum time. In the control
mode "dSC", both sensors TL1 and TBL must also be connected. Always observe the work
instruction "Requirement for correct defrost detection".
Single sensor control (SSC)
Single sensor control: The control of the room temperature as well as the defrost detection and
defrosting control takes place solely by means of the cooler block sensor TBL. The humidity level
under "cSL" must be predefined from 25 to 100% for defrost detection.
Note:
If residual ice is detected on the surface of the cooler block after a long period of operation time, this
can be due to system-related causes. In this case, check to make sure that the expansion valve is set
correctly (evaporator superheat), the system has sufficient refrigerant and the cooler block sensor
TBL is positionated according to the installation manual MIC Sensor Pt1000. This list could be
continued arbitrarely. The controller can be configured to the control mode "dSL" in order to increase
the sensitivity of the defrost detection.
cSL 75 Medium humidity level value:
25 to 100%
Defrost load pre-selection
W
E
(Config Defrost Load)
Parameter is only valid in conjunction with “cS ”, “dSL” or “cS ”, “SSC”
The expected humidity level has utmost priority for determining this value. The greater the value, the
more sensitive the defrost detection.
cD
EL
FAn
HGS
HGE
Electric defrosting with adaptive defrost
end temperature (Electric)
Recirculating air defrost
(Fan Defrost)
Hot gas defrosting in refrigerating plants
(Hot Gas Singleplants)
Hot gas defrosting in multicompressor racks
(Hot Gas extended)
Defrost management
W
E
(Config Defrost)
Hot gas defrosting in multicompressor racks/central refrigeration plants (HGE)
The cooling process is interrupted, the defrost relay switched on, the fan is controlled as configured
under "cFA". At least two coolers of double output must be in cooling mode during the defrosting
process regardless of the setpoint temperature in order to supply a cooler with hot gas for the
purpose of defrosting. The task described above can be implemented individually by the
corresponding configuration of the digital inputs "cI1"or "cI2", as shown under the menu item
defrost communication "dLC".
Hot gas defrosting in refrigerating plants (HGS)
The hot gas defrosting is initiated as in the previous case of multicompressor racks. After an
integration period for carrying out the pressure compensation, the compressor is switched on to
supply the hot gas. After the defrost end temperature has been reached, the compressor is switched
off. During the following drain down time*, the controller switches off the defrost relay, by means of a
time delay, and switches the compressor on at the end of the drain down time*.
Applicable to both hot gas defrosting methods (HGE) and (HGS)
The defrost end temperature is calculated adaptively depending on the heat content of the hot gas.
Under the menu items "cdE" and "cdP", the defrost period as well as the defrost end temperature,
can be adjusted downwards, if necessary. After reaching the defrost end temperature, the cooling
process is initiated once again at the end of an adaptive drain down time*. The start of the cooler fan is
temperature and time-delayed, depending on the setpoint temperature, as described in the standard
fan management under "Std".
Recirculating air defrosting (FAn)
The cooler fan is used exclusively for defrosting during the recirculating air defrosting. The defrost
end is calculated adaptively. The expected defrosting duration is determined by the controller within
the range of 12 to 45 minutes depending on the adjusted set point value. Two sensors are always
required for the recirculating air defrosting (control mode "cS", "dSL" or "dSC")! Setpoint values
under 0 °C / 32 °F are not permissible (Attention: even during setpoint shift the setpoint value must
not be less than 0 °C / 32 °F). Non-compliance results in the alert "EUS.". The defrost relay is
switched on during the recirculating air defrost if the goods protection program "cGP" is
configured to "OFF”. The connection of an electric heater is in this case not allowed.
Electric defrosting (EL)
The heating output required for the defrosting is supplied by an electric heater. A dynamic control
process takes place above the melting point dependent on the cooler block temperature until the
defrost end temperature is reached in order to minimise heat loss caused by convection and thermal
radiation as well as from the heating output. The LED defrost request flashes while the defrost relay is
switched off. The defrost end temperature and defrost period can be set under the menu items “cdE”
and “cdP”. Depending on the ice buildup of the cooler the defrost end temperature is increased by the
controller by a maximum of 5 K / 9 °R.
Attention!
It is essential to ensure that the coolers during the defrosting process never interfere with each other
due to secondary air currents. Secondary air currents do not only cause higher energy costs but also
seriously impair the availability of a cooling plant. This results in icing-up in the area of the cooler,
especially when operating at sub-zero temperatures.
Note:
Before starting the heat-up phase, the cooler-fan remains switched on for a maximum of 12 minutes
for the use of a possible cold storage within the cooler block. During this time, the defrost request LED
flashes. If the cooler block reaches the setpoint temperature within this time, the heat-up phase starts.
* Drain down time: After reaching the defrost end temperature, an adaptive drain down time follows
for a period of approx. 5 to 8 minutes in order to ensure that the defrost water drains off. During the
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Factory setting (All temperature values of the factory setting are indicated in Celsius)
5

Value 1 - 600 minutes
After the safety time set from 1 to 600 minutes has expired, an external standby is cancelled even if
the signal is still active.
No external safety time configured (OFF)
All control functions remain switched off for the duration of the external standby “Stb” (no time limit).
120 Adjustable value: 1 - 600 minutes
External standby safety time
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(Config Standy Duration)
Parameter is only valid in conjunction with “cI1”, “Stb” or “cI2”, “Stb”
OFF No external safety time configured
cSd
Value 0.1 - 10 K / 0.5 - 18 °R
Switch-on temperature after door opening 0.1 - 10 K / 0.5 - 18 °R greater than setpoint.
Safety temperature "Off" (OFF)
The room temperature is ignored for the duration of the door opening.
OFF
Safety temperature “Off”
cdT 2 Adjustable value: 0.1 - 10 K / 0,5 - 17.5 °R
Safety temperature during door opening
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(Config Door Temperature)
Parameter is only valid in conjunction with “cI1”, “dC” or “cI2”, “dC”
Time controlled door opening "Off”
OFF
cSS 0.0 Correction of the setpoint temperature
-30 to +30 K / -54 to +53.5 °R
Setpoint shift
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(Config Setpoint Shift)
Duration of door opening
(Config Door Duration)
Adjustable value: 1 - 120 minutes
5
cdd
Value 1 - 120 minutes
When opening the door, the cooling and fan request are suppressed for the duration of the set time
from 1 to 120 minutes. The set switch-off time can also be activated by an impulse of the door contact.
Time controlled door opening "Off" (OFF)
The cooling and fan request are suppressed for the duration of the door opening.
Parameter is only valid in conjunction with “cI1”, “SH1” or “cI1”, “Sh2” or
“cI2”, “SH1” or “cI2”, “SH2”
Parameter is only valid in conjunction with “cI1”, “dC” or “cI2”, “dC”
Correction of the setpoint temperature
If the digital input has been configured accordingly, the setpoint temperature can be increased or
decreased from -30 to +30 K / -54 to +53.5 °R here.
Note:
If circulating air defrosting is used (“cd”, “FAn”) the resulting setpoint value must not be set to less
than 0 °C / 32 °F! The alert "EUS" follows if this is disregarded.
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You can obtain more information on defrost communication with its various possible applications
directly from Cool Expert on request .
Standby (Stb)
The standby mode is initiated immediately for the duration of the connection. The message “Stb”
appears alternately with the room temperature "tL1"in the display. After cancelling the signal, the
controller remains locked for 8 minutes more. This delay time can be adjusted in operating level 2.1,
item "iSd". A safety time can be configured under “cSd”. Even in the case of continuous connection
of the digital input, the controller reassumes its control function after the safety time has expired.
Note:
An ongoing defrost is interrupted by the standby and resumed after cancelling the signal.
Detection of a door opening (dC)
The cooling request and fan run are suppressed or interrupted immediately (regardless of all
minimum runtimes). The message “-d-” is displayed alternately with the room temperature for the
duration of door opening.The duration of the door opening in conjunction with "cdd" as well as a
safety temperature under "cdt" can be configured in order to protect the goods against damage.
Setpoint shift (SH1)
The setpoint value is increased or decreased for the duration of the connection by the value
configured under "cSS" and displayed in the operating level 1 under "tSA".
Input not configured (OFF)
No function is performed during connection of the input.
Attention:
The functions of the digital inputs 1 and 2 described here may only be connected using potential-free
contacts.
c11
OFF
SH1
dC
Stb
dLC
Edd
SH2
Input not configured
(OFF)
Setpoint shift
(Setpoint shift 1)
Detection of a door opening
(Door contact)
Standby
(Standby)
Defrost communication
(Defrost Lock)
Defrost initiation
(External defrosting demand)
Setpoint shift with defrost suppression
(Setpoint shift 2)
Digital input 1 & Digital input 2
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(Config Input 1, Config Input 2)
ECd
dSU
cSU
Temperature communication
(External cooling demand)
Defrost suppression
(Defrost suppression)
Cooling request suppression
(Cooling suppression)
c12
Defrost communication with linked defrost start (dLL)
!Using electric defrost ("EL"), switching on the configured digital input results in a defrost phase after
the expiration of all minimum runtimes (cooling demand, fan, ...). After finishing the defrost, fan and
cooling demand are suppressed until the input signal is cancelled. 90 minutes after finishing the
defrost the controller is starting his regular function even if the input signal is not released. A defrost
is not allowed, if the signal for defrost suppression is switched on, or the last defrost happened less
then 1 hour ago. However, the defrost request is saved and carried out after the removal of the
internal lock.
!Using recirculating air- or hot gas defrost ("FAn", "HGE" and "HGS"), the "standard" defrost
communication is carried out (see below).
Attention: When using defrost communication with the digital inputs 1 or 2, the goods protection
program should not be configured. Nonobservance results in the alert "EUS".
Cooling request suppression (cSU)
The cooling request is suppressed or interrupted after the minimum running time has elapsed for the
duration of the connection of the digital input or for a maximum of one hour. The fan management is
not affected by this.
Defrost suppression (dSU)
External defrost suppression only takes place after connection of the corresponding configured
digital input. After cancelling the defrost suppression, a defrost can be initiated 1 hour after the
cooling request at the earliest.A defrost that has already been initiated is not interrupted.
Temperature communication (Ecd)
Two MIC QKL mini 2’s are also able to communicate with each other using their digital inputs without
a network module. An adaptive setpoint correction of more than two controllers can only be
established using optional network modules, as described under the operating level 2.2.
Directly after a controller requests cooling, a temporarily adjustment of the setpoint temperature of
the remaining controller takes place for the duration of the cooling request. The adapted setpoint
temperature is displayed in the operating level 1 under ''tSA''. The controller percieves the new
setpoint temperature and starts his cooler fan first , followed by his cooling request in the event of a
tendentiously increasing room temperature.
If the remaining controllers of the cooling position detect a tendentially falling room temperature, their
cooling contactor remains inactive whereas the cooler fans remain switched on. After the controller
which initially requested cooling reaches his setpoint temperature, the cooling request and the cooler
fans are switched off under consideration of minimum runtimes. The air cooler fan management as
configured under ''cFA'' is used again. The original setpoint temperature has now priority even for the
former adapted controller.
The procedure described above enables room-temperature driven compressor capacity-control to
be implemented easily.
You can obtain more information on temperature communication with its various possible
applications directly from Cool Expert on request.
Setpoint shift with defrost suppression (SH2)
For the duration of the connection the setpoint value is adjusted by the value configured under “cSS”.
During this time, no defrost can be initiated.A defrost that has already been initiated is not interrupted.
The “new” setpoint value is displayed in operating level 1 under “tSA”.
Defrost initiation (Edd)
Once all minimum runtimes have expired (cooling request, fan...), a defrosting process is initiated. A
defrost is not permitted if the signal of the defrost suppression is active or the last defrost took place
within less than one hour.
Defrost communication (dLC)
Multiple controllers can work together as a group in one or in several refrigerated units after initiating
a defrost in order to achieve an optimum defrost result. A defrosting controller blocks all other
controllers of a group and thus prevents the occurrence of cost-intensive peak loads. The functions
mentioned below are implemented for the duration of the connection of the configured digital input
regardless of the defrosting procedure selected.
!For electric defrosting if the configuration "EL" is selected under "cD". The controller is switched to
standby (a maximum of one hour) for the duration of the connection of the correspondingly
configured digital input. After cancelling the signal, a defrost can be initiated 1 hour after the cooling
request at the earliest.
!For hot gas defrosting in interconnected and individual refrigeration systems if the configuration
“HGE” or “HGS” is selected under “cd”. The controller is switched to cooling request to generate hot
gas (for a maximum of one hour) for the duration of the connection of the correspondingly configured
digital input, regardless of the room temperature. After cancelling the signal, a defrost can already
be initiated after 5 minutes of cooling request.
!Recirculating air defrosting if the configuration "FAN" is selected under "cD".
After the correspondingly configured digital input is connected, a defrosting process is also initiated.
If the signal continues after finishing the defrost, the controller is switched to standby. The controller
switches to normal operation after one hour at most. After cancelling the signal, a defrost can be
reinitiated after two-hours of cooling request at the earliest.
Attention: When using defrost communication with the digital inputs 1 or 2, the goods protection
program should not be configured. Nonobservance results in the alert "EUS".
Note:
For recirculating air defrost (“cd“ “FAn“), the fan is switched on during the defrost phase regardless of
the configuration given here.
dLL Defrost communication with linked defrost start
(Defrost lock linked)
Value 0- 120 Minuten
If the door remains open for longer than the configured time, a warning will be given by a periodic
acoustic signal. After further 5 minutes the alert "Edo” is generated.
Standard (Std)
If the door remains open for longer than 120 minutes without interruption, the alert “Edo” is generated
and the controller returns to its control funtion.
Stdf Standard
cdA 18 Adjustable value: 0 - 120 minutes
Alarm time during door opening
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(Config Door Alarm)
Parameter is only valid in conjunction with “cI1”, “dC ” or “cI2”, “dC ”
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Factory setting (All temperature values of the factory setting are indicated in Celsius)
6

tL1 The first menu item after changing to the
operating level (operating level 1)
-1-
Back to operating level (operating level 1)
oL1 The first menu item after changing to the
expanded configuration level
(operating level 2.1)
:2.1-
To the expanded configuration level (operating level 2.1)
P__ : 1 Password adjustable between 0 and 999
“: 1” = no password provided
Entry of password
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(Password)
tST
C_0
A_0
F_0
d_0
b_0
Test program
C_1
A_1
F_1
d_1
b_1
Cooling request relay
“Off - On”
Alert relay
“Off - On”
Fan relay
“Off - On”
Defrost heating relay
“Off - On”
Buzzer
“Off - On”
(Test-Program)
Note:
The upper control button “>” is used to select the appropriate function. The selected function is
switched on and off using the lower control button "<". The test program serves the purpose of
checking the controller functions and system components. After 12 min. have elapsed without a
button being pressed, the control will reassume its last configured functions and return to the user
nID The first menu item after changing to the
network level
(operating level 2.2)
:2.2-
To the Network level (operating level 2.2)
SUb 50.0 Setting ... bis 50 °C / 121°F
The setpoint temperature upperbound
Setpoint temperature upper bound
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(Setpoint Upper Bound)
Setpoint temperature lower bound (Setpoint Lower Bound)
rST
nO
rtd
rbt
LFP
Back to the configurationlevel without
executing a function
Reset of all values in the statistics
level (control level 3)
Restart of the controller (parameters
and configuration are retained)
Loading of the factory settings (parameters
and configuration are lost)
Reset (Reset)
cCF °C
All temperature values are
displayed in Celsius (°C)
Temperature scale (Config Celsius Fahrenheit)
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cEE OFF
On
Alert “ECO” “Off”
Alert “ECO” “On”
System monitoring
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(Config ECO Enable)
Note:
The system monitoring provides early warning of system faults before the malfunction occurs and
protects goods against damage. By tracking the block temperature during the cooling process, a
performance reduction of the cooling plant is already detected in the beginning and signalled by the
alert “ECO”.
Note:
With “SLb” und “SUb” the adjustment range of the setpoint temperature under the item “tSr” can be
limited. In conjunction with the password “P__” a manipulation of the setpoint value (control level 1
under “tSr”) can be prevented.
SLb :50.0 Setting -50°C / -58°F to ...
The setpoint temperature lowerbound
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°F All temperature values are
displayed Fahrenheit (°F)
bUC
On Buzzer Control “On”
rEP
OFF
Buzzer Control “On”
with repetition
Buzzer Control “Off”
Buzzer Control
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(Buzzer Control)
Buzzer Control “Off”
Buzzer remains disabled at all.
Buzzer Control “On” with repetition
The buzzer is switched “on” in the event of a fault. The buzzer becomes disabled by pressing one of
the buttons. If the fault is not cleared within two hours, the buzzer recurs.
Buzzer Control “On”
The buzzer is switched “on” in the event of a fault. After pressing one of the buttons, the buzzer is
disabled and remains disabled up to the next fault.
OFF Alert in the event of power failure “Off”
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PFC On Alert in the event of power failure“On”
Power failure control
(Power Fail Control)
Alert in the event of power failure“On”
After a power failure, the alert “PFL occurs.
Alert in the event of power failure“Off”
After a power failure, the alert remains disable.
Configuring the goods protection program is only possible in the case of electro- or
recirculating air defrost. In the case of recirculating air defrost the heating is done by an
additional heater.
Goods protection program on, following setpoint, with early low temperature
warning (FSL)
To protect goods from low temperature (e.g. otherwise resulting in freezing), the goods protection
program is initiated after the temperature has fallen below the actual setpoint, even if a setpoint
correction is configured. If the room temperature falls more than 0.5 K/0.9 °R below the setpoint, after
a maximum of 12 minutes the cooler fan is started. If the controller detects an ongoing negative trend
of the room temperature in a time window of 18 minutes, the heating is switched on additionally.At the
same time the low temperature warning "EGP" is displayed by the controller. If using hot gas defrost
(menu item "cd", "HGE" or "HGS") only the temperature is monitored, the defrost relay remains
unswitched.
Goods protection program on, with early low temperature warning (OnL)
In contrast to the previosly described procedure for the goods protection against low temperature,
now the lowest setpoint is relevant for the monitoring. Here the correction value must be paid
attention to, when setpoint correction is used. The further procedure is the same as described
previously ("cGP", "FSL").
Goods protection program on, following setpoint (FS)
See ("cGP", "FSL"), however without early low temperature warning. The low temperature warning
"EGP" is displayed, after the heating/heater remained on for at least 60 minutes without interruption.
Goods protection program on (On)
See ("cGP", "OnL"), however without early low temperature warning. The low temperature warning
"EGP" is displayed, after the heating/heater remained on for at least 60 minutes without interruption.
Goods protection program off (OFF)
Room temperatures below the setpoint are not monitored.
Note:
The setting "FSP" together with the setpoint correction "cSS" could also be used as an unfreezing- or
heating program. In the case of single sensor control ("cS","cSS") the goods protection program is
not taken into account.
Attention: When using defrost communication with the digital inputs 1 or 2, the goods protection
program should not be configured. Nonobservance results in the alert "EUS".
On
OFF
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cGP
FS
ONL
FSL
Goods protection program “on”,
following setpoint
Goods protection program “on”
Goods protection program “off”
Goods protection program “on”,
with early low temperature warning
Goods protection program “on”, following
setpoint, with early low temperature warning
Goods protection program (Config Goods Protection)
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Factory setting (All temperature values of the factory setting are indicated in Celsius)
7

Operating level 2.2
The network level
oL1 0.0
Correction factor: -10 to 10 K / -18 bis 17,5 °R
Correction factors for sensor TL1 and TBL
oBL 0.0
Correction factor: -10 to 10 K / -18 bis 17,5 °R
MIC QKL mini 2
:2.2-
-°cool expert
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Correction factor (oL1), (obL)
The sensor values measured by the controller can be corrected in the range -10 to 10 K / -18 to 17.5
°R. The set correction value is added to or subtracted from the measured sensor values.
Note:
IIn some practical applications, in exceptional cases, when the sensor lines TL1 and TBL are
extendedand cable conductors are missing, the three-wire measurement technique can be replaced
by a two-wire measurement technique. The resistance resulting from this, which is normally
compensated by the three-wire measurement technique, can be compensated by this parameter. If
the two-wire measurement is absolutely essential, the sensors TL1 and TBL are connected to
terminals 7 and 8 as well as 8 and 9. Abridge must be inserted between terminals 6 and 7 as well as 9
cS The first menu item after changing to the
configuration level (operating level 2)
-2-
Back to the configuration level (operating level 2)
Room temperature TL1 (Offset tL1)
Block temperature TBL (Offset tBL)
Operating level 2.1
The expanded configuration level
MIC QKL mini 2
:2.1-
-°cool expert
dt OFF
On
Temperature display “tL1” hidden
Temperature display “tL1” switched on
Display/hide temperature display (Display temperature)
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Temperature display "tL1" switched on
Display of the room temperature in operating level 1 under “tL1”
Temperature display "tL1" hidden
Display of the room temperature is hidden after 5 minutes (Display in the display “___”) The room
temperature is displayed again by pressing a control button.
iHC OFF
1
No internal heat control
Heating control activated, value 1-15
Internal heat control (Internal heat control)
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Heating control activated, value 1-15
Depending on this value the connected defrost heater will be checked in defined intervals. A
value of 1 represents 6 month. Higher values will decrease the interval.
Attention:
Values larger than 5 can possibly affect the control functions in a negative way and should only
be used on behalf of the Cool Expert Service.
No internal heat control (OFF)
Interval checks of the defrost heater are disabled.
iSd Std
30
Standard
Value 1 - 900 seconds
Internal standby delay (Internal standby delay)
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Value 1 - 900 seconds
Once a standby signal is cancelled (by digital input or network module), the controller remains
blocked for the programmed duration.
Default standby delay (STD)
The standby delay is set to 8 minutes (480 seconds).
Adjustable value 1 – 16
The controllers in a network can be linked and separated in up to 16 communication groups.
Controllers with the same identification number can communicate with each other. Precondition is
that they are configured as described below. Up to 128 controllers can be linked in one network.
Network based Communication “Off“ (OFF)
Network based communication disabled for this controller.
1 Adjustable value 1 – 16
Network identification
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(Network identifikation)
OFF Network based communication “off”
nId
Value 1 - 8
With ‘‘ntG‘‘ it is possible to balance different room temperature zones in one and the same cooling
position, using a setpoint adaption. Furthermore it is easily possible to assign the capacities of the
evaporators to the capacities of the compressors according to the desired temperature difference
DT1 (room-temperature based central refrigeration plant capacity control). Up to 16 Controllers can
be linked in one temperature-communication-group. Precondition: The controllers belonging to the
same temperature communication group have to be set to the same value of ‘’ntG’’ and ‘’nId’’. For
this purpose all evaporators have to be equipped with a controller. The coordination of the
temperature balancing is done by temporarily adjusting the setpoint temperature. The adapted
setpoint temperature is displayed in the operating level 1 under ''tSA''. The communicating
controllers perceive the new setpoint temperatures and first start their cooler fans followed by their
cooling request, in the event of a tendentiously increasing room temperature. If the remaining
controllers of the cooling position detect a tendentially falling room temperature, their cooling
contactor remains inactive whereas the cooler fans remain switched on. After the controller which
initially requested cooling reaches his setpoint temperature, the cooling request and the cooler fans
are switched off under consideration of minimum runtimes. The air cooler fan management as
configured under ''cFA'' is used again. The original setpoint temperature has now priority even for the
adapted controller.A deviation of the setpoint temperature within a group is limited to max. 8 K / 14.5
°R.In the case of setpoint temperatures above freezing point, the controller ensures that the room
temperature does not fall below 0.5 °C / 32.9 °F.
You can obtain more information on temperature communication with its various possible
applications directly from Cool Expert on request.
Communication of temperature “Off” (OFF)
No network based temperature communication.
Note:
The temperature communication using the digital inputs is disabled when a temperature
communication group is set.
3 Adjustable value 1 - 8
Temperature communication group
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(Network temperature group)
OFF Temperature communication “off”
ntG
2 Adjustable value 1 - 8
Defrost communication group
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(Network defrost group)
OFF Defrost Communication “Off”
ndG
In preparation: this parameter has currently no function!
1 Adjustable value 1 – 8
Support group
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(Network support group)
OFF No support group configured
nUG
Parameter only valid in combination with “ndG”, “1” or higher , hot gas defrost
“-2-”, “cd”, “HGE” or “HGS” and electrical defrost “-2-”,“cd”, “EL”
Attention: Requirement for the usage of the network functions is that each controller is equipped
with a network module. Controller release R19 and later have to be equipped with a network module
release IF3.
Value 1 – 8
Up to 16 controllers can be linked together as a defrost communication group.
Precondition: The controllers belonging to the same defrost communication group have to be set to
the same value of ‘’ndG’’ and ‘’nId’’ . Controllers of the same defrost communication group are
working together and are coordinating their defrost processes in order to reach an optimum defrost
result. A defrosting controller is locking the remaining controllers of the group (Cooling request- and
defrost suppression). In this way the occurance of cost intensive load peaks, as well as influences
due to secondary air flows are avoided.The following processes are carried out, depending on the
selected defrosting method.
!For electric defrosting, if the configuration "EL" is selected under "cD". If the controllers detect that
one controller of their defrost communication group has started a defrosting process, all the
remaining controllers are switched to standby. In the irregular case, the cancelling of the standby
state is done after the defrosting time exceeds 90 minutes.. After cancelling the signal, the next
defrosting process for thecontrollers that where switched to standby before is only allowed after one
hour or if the setpoint temperature was reached.
!For hot gas defrosting in interconnected and individual refrigeration systems if the configuration
“HGE” or “HGS” is selected under “cd”. Network defrost communication in combination with hot
gas defrosting is not implemented in this software version.
!Recirculating air defrosting if the configuration "FAN" is selected under "cD". If the controllers of a
defrost communication group percieve that one controller of their group has started a defrosting
process, all the remaining controllers initiate a defrosting process for themselves. The cooling
process can only be initiated again after all controllers of the concerned defrosting group have
finished their defrosting process or if a safety time of 90 minutes is exceeded. After resuming the
cooling process the next defrosting can be initiated after a total of 2 hours cooling request (per
controller) at the earliest.
You can obtain more information on defrost communication with its various possible applications
directly from Cool Expert on request.
Defrost communication “Off” (OFF)
No network based defrost communication.
Note:
The defrost communication using the digital inputs is disabled when a defrost communication group
is set.
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Factory setting (All temperature values of the factory setting are indicated in Celsius)
8

The statistics level
tHI : 0.5 Maximum room temperature ”tL1”
(Temperature High)
Display max. & min. room temperature
tLO : 7.3 Minimum room temperature ”tL1”
(Temperature Low)
dFn 1 The number of defrosting processes
Display defrost count (Defrost Number)
MIC QKL mini 2
-3-
-°cool expert
dCn 18 Number of door openings
Display number of door openings (Door Contact Number)
ECn 3 Number of “ECO” alerts
Display number of alerts “ECO”(ECO Number)
Operating level 3
Note:
The number of “ECO” alerts is recorded even if sytem monitoring is deactivated (Operating level 2
“cEE”, “OFF”) .
PFn 2 Number of power failures
Number of power failures (Pfn Number)
Note:
In the event of power failure and restoration of power the counter under “PFN” is increased by one.
Note:
After the first start-up of the controller or after resetting the statistic values, it can last up to 15 minutes
until a value is visible.
The maximum and minimum room temperature is evaluated by sensor TL1 and is therefore only
possible in the case of the two-sensor control.
Note:
Only in conjunction with configured door contact "dC" under “cI1” or “cI2”
Edn 2 Number of “Edo” alerts
Display number of alerts “Edo”(ECO Number)
Idn
Version number (Ident Number)
Note:
The values above are needed for diagnosis in the case of service by Cool Expert and are
insignificant for the normal operation.
Diagnostic values (Cool Expert internal)
d_1
d_6
d_2
d_7 d_8 d_9
d_3 d_4 d_5
tL1 The first menu item after changing to the
operating level (operating level 1)
-1-
Back to operating level (operating level 1)
Note:
All statistical values can be reset in operating level 2 (configuration level) under the menu item "rST, rtd".
Show support group (SUG)
When pressing the lower button “<” all controllers within the same support group will signal their
group membership by winking*.
Show defrost communication group (SdG)
When pressing the lower button “<” all controllers within the same defrost communication group will
signal their group membership by winking*.
Show temperature communication group (StG)
When pressing the lower button “<” all controllers within the same temperature communication
group will signal their group membership by winking*.
Show network identification (SId)
When pressing the lower button “<” all controllers within the same network identification will signal
their group membership by winking*.
cS The first menu item after changing to the
configuration level (operating level 2)
-2-
Back to the configuration level (operating level 2)
.1
r19
cE3
Displays software subversion
Displays control version
Displays device name
.38 Displays software version
i3.0
i_0
Displays Network interface version
“i_0”: no network interface registered
“i_1”: network interface registered
9
Network service message (nSP)
When pressing the lower button “<” a network service message is send.
Note:
“-A-” is shown if a message is sent successfully. The blinking Alarm-LED indicates an error when
trying to send a message (e.g. no network module present, communication deactivated).
*winking: a winking controller shows a rotating “° ” in the display for aprox. 5 seconds and can
SId
nSP
ntS
StG
SdG
SUG
Show temperature communication group
(Show temperature group)
Show network identification
(Show network identifikation)
Network service message
(Network servicepin)
Show defrost communication group
(Show defrost group)
Show support group
(Show support group)
Network test (Network test)
In preparation: this parameter has currently no function!
1 Adjustable value 1 - 100
Hot gas power factor
W
E
(Network support power)
nUP

ES1 Sensor fault TL1
Cause:
Temperature sensor “tL1” not functioning.
Measures:
Check sensor TL1 or supply cable, line break or line-to-line fault.
Alerts
ES2 Sensor fault TBL
Cause:
Temperature sensor “tbL” not functioning.
Measures:
Check sensor TBL or supply cable, line break or line-to-line fault.
PFL Power failure
Cause:
Interruption of the power supply.
Measures:
Check power supply, possibly power failure, wire breakage or loose contact.
Note:
The monitoring of the power supply can be activated or deactivated in the operating level 2 under
“PFC”. The frequency of the voltage cut-off can be queried in the operating level 3 under “PFn”.
ECO System monitoring
Cause:
!Controller detects no falling trend of the cooler block temperature during cooling request. The time-
delayed alert takes place individually and is dependent on the speed of a constantly increasing
block temperature. The alert takes place after 36 minutes at the earliest or after 6 hours at the latest.
!During cooling request the temperature difference between the sensors TL1 and TBL is greater than
20 K /36 °R, for at least 30 minutes without interruption.
Measures:
!Check system design (load of the refrigeration unit is too high in the case of storage).
!Check number of times door is opened (displayed in operating level 3 under “dCn”).
!Check the function of the compressor (high pressure, low pressure, oil pressure difference,
protective motor switch).
!Check expansion valve, adjust if necessary
!Check system for lack of refrigerant.
!Check condenser for dirt.
!Check that machinery room has sufficient ventilation.
!Check size and design of the liquid solenoid valve.
!Check the function of the cooler-fan.
!Check pressure-dependent speed control of the condenser fan (important at ambient temperatures
< 5 °C / 41 °F).
!Check neutral zone pressure switch (compressor is switched off before reaching the setpoint
temperature).
Note:
If the refrigerated unit is constantly overloaded, the system monitoring can be deactivated in the
operating level 2 under “cEE”. No message is generated then.
EC1 Time-based system monitoring
Cause:
Setpoint temperature not reached within 48 hours, or 12 defrosts in succession without reaching the
setpoint temperature.
Measures:
Check cooling plant for sufficient output.
E34
Internal control faults
Cause:
Internal fault of the control function
Measures:
Disconnect controller from the mains and restart. If one of the aforementioned alerts should occur
repeatedly, the controller must be replaced.
ER0 EPr
EdF Heating fault
Cause:
!Maximum defrost period of one hour exceeded.
Measures:
!Check output of the heater in the case of electric defrosting.
!Check setting of the safety temperature limiter.
!In the case of hot gas defrosting, check heat content of the hot gas.
!Check, if necessary, whether heat is escaping during the defrost due to secondary air currents.
EUS Invalid configuration
Cause:
!Aconfiguration entered by the user is invalid.
!The position of the sensors TL1 and TBL is mixed up.
Measures:
Check the following configurations:
!Recirculating air defrosting (item ”cd”, “FAn”) in conjunction with the one-sensor control (operating
level 2 under “cS”, “SSC”) is invalid.
!Setpoint values (under “tSr”) less than 0 °C / 32°F in the case of the recirculating air defrosting
(operating level 2 under ”cd”,“FAn”) are invalid.(In the case of the setpoint shift (operating level 2
under “cSS”) the resulting setpoint value is less than 0 °C / 32 °F)
Notes:
As a rule: When the alert occurs, the last parameter changed in the configuration level was incorrect.
The alert “EUS” cannot be acknowledged. The message is cancelled automatically as soon as the
cause of the fault has been removed.
Edo Monitoring the door opening time
Cause:
Door opened for more than the door alarm time (item ”cdA” in combination with “cI1” od “cI2”, “dc”)
without interruption.
Measures:
Close door. Check the function of the door contact if necessary.
Messages
UCH
Standby by user
Controller was switched to standby by user in operating level 1 (“ECt” to “OFF”). The message “UCH”
is displayed alternately with the room temperature for the duration of the standby.
Stb Standby by digital input
Controller was switched to standby by digital input. The message “Stb” is displayed alternately with
the room temperature for the duration of the standby.
EI0 Network module not recognized
Cause:
Network module cannot be recognized by the controller.
Measures:
Check network module and replace it if necessary.
EI1 Maximum utilisation of the network module
Cause:
Network module is overloaded by the data traffic occurring in the network.
Measures:
Check network configuration.
Note:
Alerts detected by the controller remain stored even in the event of a power failure and are displayed again when power is restored (Fault display LED, alert and
buzzer). Alerts can only be cleared under the menu item “ALT” with “cLr”. If the Power fail control “PFC” is set to “ON”, i.e. switched on, the alert “PFL” is displayed
when power is restored.
EGF Early low temperature warning / Goods protection fault
Cause:
!Early low temperature warning (read under “cGP”, “FSL” and “OnL”)
!No increase of room temperature reached within a heating period of 60 minutes.
!During the heating period, for at least 15 minutes, block temperature lies 15K / 27°R above room
temperature.
Measures:
!Check the function and output of the connected heater.
!Check cooler fan.
-d-
Message at door opening
The message “-d-” is displayed alternately with the room temperature for the duration of door
opening, when digital input (under “cI1” od “cI2”, “dc”) is configured accordingly.
IF3 Network module initialized
The message “IF3” appears after initialization or when a network module is installed.
IF_ Network module removed
The message “IF_” appears after removing a network module.
10

11

The expanded configuration level
oL1
obL
dt
-2-
Correction factor for sensor TL1
Correction factor for sensor TBL
Display/hide temperature display
Back to the configuration level
(operating level 2)
0.0
0.0
On
cS
Parameter Description Factory
setting Setting
(Operating level 2.1)
Display
only
The statistics level
Display max. room temperature
Display min. room temperature
Display defrost count
Display number of door openings
Display number of alerts “Edo”
Display number of alerts “ECO”
Number of power failures
Version number
Diagnostic values (Cool Expert internal)
Back to operating level (operating level 1)
Description
(Operating level 3)
tHI
tLO
dFN
dCN
EDn
ECn
PFn
Idn
d_1
d_9
-1-
Parameter
.
.
.
-0.5
-7.3
1
18
2
3
2
r17
CtL
86
tL1
Factory
setting
e. g.
e. g.
e. g.
e. g.
e. g.
e. g.
e. g.
e. g.
e. g.
.
.
.
Setting
Display
only
Display
only
Display
only
Display
only
Display
only
Display
only
Display
only
Display
only
Display
only
Display
only
Display
only
.
.
.
The Operating level
tbL
tL1
tSA
tSr
ALT
ECT
-2-
-3-
Display of room temperature
Display of block temperature
Display of current setpoint temperature
Setpoint temperature setting
Alerts
Control On / Off (Standby)
To the configuration level (operating level 2)
To the statistics Level (operating level 3)
Parameter Description
(Operating level 1)
Setting
Display
only
Display
only
Display
only
Display
only
Display
only
Display
only
Factory
setting
-0.5
-7.3
-5.0
-0.0
nO
On
cS
tHI
e.g.
e. g.
e. g.
The configuration level
Control mode (Sensors & defrost detection)
Defrost load pre-selection
Defrost management
Defrost end temperature
Defrost period
Air cooler fan management
Digital input 1
Digital input 2
Setpoint shift
Duration of door opening
Safety temperature during door opening
External standby safety time
Goods protection program
System monitoring
Temperature scale
Setpoint temperature lower bound
Setpoint temperature upper bound
Reset
Buzzer control
Power failure control
Test program
Entry of password
To the expanded configuration level
(operating level 2.1)
To the Network level (operating level 2.2)
cS
cSL
cd
cdE
cdP
cFA
cI1
cI2
cSS
cdd
cdt
cSD
cGP
cEE
cCF
SLb
SUB
rST
bUC
PFC
tSt
P__
-2.1-
-2.2-
Parameter Description
dSC
75
EL
10.0
STd
STD
OFF
OFF
0.0
OFF
2
OFF
OFF
On
°C
-50.0
50.0
nO
On
OFF
A_0
- 1
oL1
LSP
Factory
setting
(Operating level 2)
Setting
Display
only
Display
only
Display
only
Display
only
MIC QKL mini 2
Reference
Customer:
Plant:
Controller No.:
Serial No.:
Marks:
Refrigeration
specialist:
Address:
Phone:
Contact:
Alarm time during door opening
cdA STD
Back to operating level (operating level 1)
-1- tL1 Display
only
iHC
iSd
Internal heat control
Internal standby delay
OFF
STD
Back to operating level (operating level 1)
-1- tL1 Display
only
The network level
Network Identification
Temperature communication grout
Defrost communication grout
Support group
Hot gas power factor
Network test
Back to the configuration level
(operating level 2)
nId
ntG
ndG
nUG
nUP
ntS
-2-
Parameter Description
OFF
OFF
OFF
OFF
1
nSP
cS
Factory
setting Setting
(The network level)
Display
only
Display
only
12
Cool Expert
Entwicklungs GmbH
Besenacker 14
D-35108 Allendorf (Eder)
Tel. [phone]
Fax [phone]
e-mail [email protected]
Internet www.cool-expert.de