STORK TRONIC ST710-KPLVR.112S Quick start guide

Order no.: 900312.001 V2.0 Page 1
ST710-KPLVR.112S
Controller for cooling applications
Order number 900312.001
As of: 26.11.2015, Software V2.0
Wiring diagram
Product description
The cooling controller ST710-KPLVR.112S has an interface for ST-Bus/MOD-Bus.
Besides PTC, the three sensor entrances are applicable also for Pt1000 resistance, which clearly
increases the measuring range. The functions of the switching input and the four relay exits can be
freely selected, whereas various applications with only one controller are possible. The controller,
for example, can operate with two coolers if the evaporator sensor is parametered as sensor for a
second refrigerating chamber.
Sensor: PTC
Range: -50...150 °C
Front size: 84mm x 42mm
Panel cut-out: 67.5mm x 31.5mm
Tightness: front IP65
Connector: plug and socket
Special software: ST-Bus / MOD-Bus switchable (see parameter L10)

Order no.: 900312.001 V2.0 Page 2

Order no.: 900312.001 V2.0 Page 3
SOFTWARE
COOLING CONTROLLER ST710-xxx.112

Order no.: 900312.001 V2.0 Page 4
GENERAL INFORMATION
The ST……112 controllers are designed for
general use in refrigerating plants.
Depending on the existing hardware, up to four
temperature sensors can be connected. These can
either be used for capturing the cold store
temperature, evaporator temperature, super-frost
core temperature, the temperature of a second
control circuit or the temperature of the condenser.
The type, function, offset and weighting of each
sensor can be configured separately via
parameters. Additionally, an analogue input
(4..20mA) can be made available for capturing
pressure levels, e.g. for condenser/fan control,
provided that the required hardware is available.
The max. four digital inputs can also be configured
separately, depending on the hardware installed.
Possible functions include: standby, door contact,
high-pressure or low-pressure switch.
Depending on the hardware, up to eight relay
outputs are possible the functions of which can be
configured as required via parameters. Please
refer to the specifications of the hardware installed
to ensure that the relays are not overloaded. Also
refer to the circuit diagram in the corresponding
device manual.
All parameters can also be accessed via the
RS485 interface. If an internal clock is provided in
the hardware, the corresponding functions, e.g.
defrosting or night-time increase/decrease of
setpoint, can be set and started via parameters.
CONTROL KEYS
Key T1: UP ( up-arrow )
By pressing this key the parameter or
parameter value is increased. A further
function of the key can be set with parameters .
Key T2: DOWN ( down-arrow )
By pressing this key the parameter or
parameter value is decreased. A further
function of the key can be set with parameter .
Key T3: Function key
The function of the key can be set with
parameter .
Key T4: SET
While SET key is pressed, the setpoint S is
indicated. The function of the key can be set
with parameter  (unchangeable in this case).
Key T5: STANDBY
The function of the key can be set with
parameter . It is preset as standby key.
Thus the unit can be switched on or off (no mains
disconnection).
The cooling controller is generally controlled using
the buttons UP, DOWN and SET. The standard
display indicates the temperature of the cold store
(actual temperature value). Press SET button to
switch over the display to the required cold store
temperature (setpoint temperature).
The setpoint temperature can only be changed by
pressing buttons SET and UP or SET and DOWN
at the same time. While pressing the buttons, the
changing setpoint temperature is displayed. After
changing the setpoint temperature and releasing
the buttons, the actual temperature is displayed
again. This is the standard setting method.
If you press the STANDBY button during operation
(for at least 3 seconds), the cooling controller is
switched off and the message  will be
displayed. To switch on the controller again, press
the STANDBY button again.
T1 T3 T5
T2 T4
3
2
1
SET

Order no.: 900312.001 V2.0 Page 5
In addition to setting the temperature value, the
buttons UP and DOWN perform other functions,
too. Pressing the UP for 3 seconds will trigger a
non-standard defrosting operation of the
refrigerating plant. In the case of an alarm (with
buzzer triggered), the DOWN button can be used
for acknowledging the buzzer sound.
PARAMETERISATION
Parameterisation of the cooling controller is done
in the factory or during commissioning of a cold
store by qualified staff. Wrong or inappropriate
parameterisation can result in malfunction and
damage of the refrigerated goods. Parameter
setting is possible only after entering one or more
passwords. In the following list of parameters, all
parameters of a complex cooling controller are
listed. Please note, however, that the parameters
listed are only available in controller designs where
the relevant hardware (outputs, inputs, sensors
and internal clock) is available.
Parameterisation is possible at any time. The
control operation is not interrupted during
parameterisation, but can have a direct influence
on it. If no button is pressed for 2 minutes, the
operation is stopped and the actual value is
displayed again.
To activate parameterisation mode, press buttons
UP and DOWN at the same time. After approx. 3
seconds, the code word .will be displayed.
Press UP or DOWN to switch between code words
 and . All other settings / value
specifications in parameter setting mode are
performed using the default value setting method,
i.e. pressing buttons SET and UP / DOWN at the
same time.
 NETWORK ADDRESS
Under code word  you can set a
network address. This is required for
commissioning networked systems.
 ENTERING A PASSWORD
By selecting code word , you can
enter a password required for
parameterisation. Once the password
has been entered , the name of
the first group of parameters is
displayed  (alarms). Now, using
the buttons UP and DOWN you can
select any of the parameter groups
quickly.
 ALARMS
Once you have selected a parameter
group, it will normally be sufficient if
you press the button SET ( will
be displayed) and then release the
button again. Now, the first parameter
of the group will be displayed
(parameter  in parameter group
, for example).
Using the buttons UP and DOWN you can scroll
the parameter group and change certain
parameter values using the default value setting
method. Press buttons UP and DOWN at the same
time to quit any parameter group and return to the
list of parameter groups. To quit the list of
parameter groups and return to the standard level,
press buttons UP and DOWN at the same time.
In some cases, certain parameter groups may be
protected by a password. In this case, you will
have to enter a specific password for the
parameter group like in the case of activation of
the parameterisation level.

Order no.: 900312.001 V2.0 Page 6

Alarms
*

Buttons and switching inputs

Control circuits 1

Defrosting control circuits 1

Fan control circuits 1

Temperature sensors
*

Pre-defined sets of parameters
*

Networking and display
*

Relay contacts and lamps
*

Control circuit 2
* These levels by default are protected by a password.

Order no.: 900312.001 V2.0 Page 7
 Alarms
Para-
meter
Description of function
Setting range
Values
default

Assignment of alarm sensors, detailed
description of sensors in parameters

through

0: none
1: Sensor F1
2: Sensor F2
3: Sensor F3
4: Sensor F4
5: weighted mean value from F1 and F2
1

Upper limit value
0.0: inactive
+0.1...+99.0°C
10.0

Lower limit value
-99.0...-0.1°C
0.0: inactive
-10.0

Switching mode of alarm relay
0: on if alarm present (normal)
1: off if alarm present (inverse)
1

Switching hysteresis for alarm
0.1...15.0°C
2.0

Alarm suppression time after temperature
alarm
0...240 min.
10

Alarm suppression time after defrosting
0...240 Min
15

Alarm suppression time after control ON or
change of setpoint and/or alarm limits
0...300 Min.
180

Alarm suppression time, door open
0: no alarm
1 ... 600 sec.
180

Behaviour if temperature alarm disappears
again
0: without buzzer, delete automatically
1: with buzzer, delete automatically
2: without buzzer, with acknowledgement
3: with buzzer, with acknowledgement
1

Function buzzer and/or display
in the case of alarm (temp. alarm see

)
0: no display, no buzzer
1: display flashing only
2: buzzer active only
3: display flashing, buzzer active
4: like 2., can be acknowledged
5: like 3., buzzer can be acknowledged
6: like 5., recurring after 
5

Buzzer recurring after acknowledgement
1 ... 120 min.
30

Reset MIN / MAX memory
0: -
1: reset MAX memory
2: reset MIN memory
3: Reset MAX and MIN memory
0

Display of current MAX memory
Measured value, not adjustable

Display of current MIN memory
Measured value, not adjustable

Function of high-pressure switch
Releases until permanent alarm
0: no permanent alarm
1..10 : releases per 15 min.
0

Function of low-pressure switch
Releases until permanent alarm
0: no permanent alarm
1...300 sec.
0

Alarm messages via ST-Bus during
Standby
see table at parameter description
18

Password of parameter level 
-99 ... 999
0

Order no.: 900312.001 V2.0 Page 8
 Buttons and switching inputs (password-protected)
Para-
meter
Description of function
Setting range
Values
default

Function button T1
0: without function
1: controller on/standby
2: defrosting request
3: acknowledge alarm
4: relay function light 1, not active in standby
5: relay function light 1, regardless of standby
6: relay function light 2, not active in standby
7: relay function light 2, regardless of standby
8: relay function window heating, inctive in standby
9: relay function window heating, reg.less of stby
10: relay function blade scraper, inactive in standby
11: relay function blade scraper, reg.less of standby
12: relay function door frame heating,
inactive in standby
13: relay function door frame heating,
regardless of standby
14: relay function F, not active in standby
15: relay function F, regardless of standby
16: Set1 / Set2 change-over
17: day / night change-over
18: "super-frost“ on/off
19: evaporator fan on permanently
20: control circuit 1 on/off
21: control circuit 2 on/off
22: set for setpoint Y1
23: display MIN
24: display MAX
25: display sensor F1
26: display sensor F2
27: display sensor F3
28: display sensor F4
29: display sensor F5
30: reset both MIN/MAX
31: reset MIN
32: reset MAX
2

Function button T2
see 
3

Function button T3
see 
0

Function button T4
see 
0

Function button T5
see 
1

Function button T6
see 
0

Function button T7
see 
0

Function button T8
see 
0

Order no.: 900312.001 V2.0 Page 9
Para-
meter
Description of function
Setting range
Values
default

Function of external switching
input E1
0: without function
1: controller on/standby
2: high-pressure alarm (see

)
3: low-pressure alarm (see

)
4: door contact (light on, fan off, see

)
5: relay function A (light 1), not active in standby
6: relay function A (light 1), regardless of standby
7: relay function B (light 2), not active in standby
8: relay function B (light 2), regardless of standby
9: relay function C (window heating),
not active in standby
10: relay function C (window heating),
regardless of standby
11: relay function D (blade scraper),
not active in standby
12: relay function D (blade scraper),
regardless of standby
13: relay function E (door frame heating),
not active in standby
14: relay function E (door frame heating),
regardless of standby
15: relay function F, not active in standby
16: relay function F, regardless of standby
17: Set1 / Set2 change-over
18: day / night change-over
19: "super-frost“ on/off (see

...

)
20: evaporator fan on permanently
21: defrosting request circuit 1
22: defrosting request circuit 2
23: control circuit 1 on/off
24: control circuit 2 on/off
0

Switching input E1 inverse / not
inverse
0: normal
1: inverse
0

Function of switching input E2
see 
0

Input E2 inverse / not inverse
see 
0

Function of switching input E3
see 
0

Input E3 inverse / not inverse
see 
0

Function of switching input E4
see 
0

Input E4 inverse / not inverse
see 
0

Password of parameter level 
-99 ... 999
-19

Order no.: 900312.001 V2.0 Page 10
 Control circuit 1
Para-
meter
Description of function
Setting range
Values
default

Assignment of cold store sensors, detailed
description of sensors in parameters

through

0: none
1: Sensor F1
2: Sensor F2
3: Sensor F3
4: Sensor F4
5: weighted mean value from
F1 and F2
1

Setpoint for Set1
...
0.0

Night setpoint
(relative to current setpoint  / )
-20 ... +20.0°C
5.0

Setpoint for Set2
...
2.0

Switching mode
0: heating
1: refrigerating
1

Hysteresis
0.1...15.0°C
2.0

Hysteresis mode
0: symmetrical
1: one-sided
1

Upper setpoint limit
...+99°C
50.0

Lower setpoint limit
-99°C...
-50

Start protection after compressor start
0 ... 900 sec.
300

Start protection after compressor stop
0 ... 900 sec.
180

Start protection compressor after mains on
0 ... 60 min.
0

On-time in emergency operation
0 ... 100%
50

Cycle time in emergency operation
5 ... 60 min.
10

Assignment of sensor for "super-frost"
(also core or product temperature)
detailed description of sensors in parameters

through

0: none
1: Sensor F1
2: Sensor F2
3: Sensor F3
4: Sensor F4
5: weighted mean value from
F1 and F2
1

"super-frost“: time limit
("shock-frost", "max. cooling power")
1 ... 36 hrs.
10

"super-frost“: temperature limit
("shock-frost", "max. cooling power")
-40 ... 0°C
0.0

"super-frost“: automatic off
("shock-frost", "max. cooling power")
0: none, manual only
1: controlled by time
2: controlled by time or temperature
2

Password of parameter level c
-99 ... 999
0

Order no.: 900312.001 V2.0 Page 11
 Defrosting control circuit 1
Para-
meter
Description of function
Setting range
Values
default

Assignment of evaporation sensors
(defrosting sensors)
detailed description of sensors in parameters

through

0: none
1: Sensor F1
2: Sensor F2
3: Sensor F3
4: Sensor F4
5: weighted mean value from
F1 and F2
2

Defrosting interval
0: no automatic defrosting
1...99 hrs.
8

Type of defrosting
0: no defrosting
1: compressor off only (circulating air)
2: electrical
3: with hot gas
2

Stop at defrosting temperature
0 ... +30.0°C
10.0

Defrosting time limitation
1...99 min.
30

Display of cold store temperature during
defrosting
0: normal
1: last temperature before defrosting
1

Temperature difference to cold store setpoint
in previous cooling
-15°C ... 0.0°C
0.0

Time limitation in previous cooling
1 ... 180 min.
10

Delay of start of defrosting after compressor
off =2
0 ... 900 sec.
60

Dripping time
0 ... 15 min.
1

Stop delay drip tray heating
0 ... 60 min.
10

Password of parameter level 
-99 ... 999
0
 Fan control circuit 1
Para-
meter
Description of function
Setting range
Values
default

Fan speed control mode, Set1
0 ... 100%
80.0

Fan speed defrosting, Set1
0 ... 100%
80.0

Fan speed control mode, Set2
0 ... 100%
100

Fan speed defrosting, Set2
0 ... 100%
100

Start-up time
0 ... 60 sec.
5

Minimum speed
(output variable if result=0)
0 ... 100%
10.0

Order no.: 900312.001 V2.0 Page 12
Para-
meter
Description of function
Setting range
Values
default

Evaporator fan
Fan mode normal operation
Remark: Control setpoint if

>4
is

or

0: off
1: continuous operation
2: like 1, with drip interruption
3: with compressor on
4: temperature-controlled
evaporator sensor only
5: temperature-controlled
difference between cold store and
evaporator sensor
3

Evaporator fan
Fan mode defrosting
0: off
1: on
0

Evaporator fan
Delay after compressor start
0 ... 600 sec.
0

Evaporator fan
Delay after defrosting
0 ... 600 sec.
120

Evaporator fan
Drip interruption time if =2
0 ... 600 sec.
180

Evaporator fan
Control offset if =4 or 5
-15.0 ... +15.0°C
0.0

Evaporator fan
Control hysteresis if =4 or 5
0.1 ... 15.0°C
2.0

Assignment of condenser sensors
detailed description of sensors in parameters

through

0: none
1: Sensor F1
2: Sensor F2
3: Sensor F3
4: Sensor F4
5:weighted mean value from
F1 and F2
0

Condenser fan
setpoint
-55...+150°C
60.0

Condenser fan
switching hysteresis
0.1...15.0°C
10.0

Condenser fan
delay after compressor start
0...300 sec.
60

Condenser fan
delay after compressor stop
(after-running)
0...600 sec.
300

Condenser fan
function
0: always off
1: always on
2: on if compressor on
3: after setpoint

4: like 3., as P controller
2

Proportional range P-controller
if set to =4
0.1 ... 30.0°C
10.0

Minimum speed
(output PWM if result =0)
0 ... 100%
10.0

Condenser fan start-up time
0 ... 60 sec.
10

Password of parameter level 
-99 ... 999
0

Order no.: 900312.001 V2.0 Page 13
 Temperature sensors (password-protected)
Para-
meter
Description of function
Setting range
Values
default

Mains frequency
0: 50Hz
1: 60Hz
0

Act. value sensor F1
Measured value, not adjustable

Calibration sensor F1 (act. value correction)
-20...+20.0°C
0.0

Weighting factor sensor F1
0.50...1.50
1.00

Selection sensor F1
Depending on hardware, not all types are
available. Sensor will be deactivated in this
case.
0: not existing
1: PTC (-50..+150°C)
2: Pt100 2-wire (-100…+600°C)
3: Pt100 3-wire (-100…+500°C)
4: NTC (-40…+40°C)
5: Pt1000 2-wire (-100…+330°C)
6: Pt1000 3-wire (-100…+300°C)
7: 0-20mA
8: 4-20mA
1

Software filter sensor F1
1 ... 32
8

Display at 0/4mA and
sensor selection =7/8
-99...+999
0.0

Display at 20 mA and
sensor selection =7/8
-99...+999
100

Act. value sensor F2
Measured value, not adjustable


Calibration sensor F2 (act. value correction)
-20...+20.0°C
0.0

Weighting factor sensor F2
0.50...1.50
1.00

Selection sensor F2
see 
1

Software filter sensor F2
1 ... 32
8

Display at 0/4 mA and
sensor selection =7/8
-99..+999
0.0

Display at 20 mA and
sensor selection =7/8
-99..+999
100

Act. value sensor F3
Measured value, not adjustable


Calibration sensor F3 (act. value correction)
-20...+20.0°C
0.0

Weighting factor sensor F3
0.50...1.50
1.00

Selection sensor F3
see 
0

Software filter sensor F3
1 ... 32
8

Display at 0/4 mA and
sensor selection =7/8
-99..+999
0.0

Display at 20 mA and
sensor selection =7/8
-99...+999
100

Act. value sensor F4
Measured value, not adjustable


Calibration sensor F4 (act. value correction)
-20...+20.0°C
0.0

Weighting factor sensor F4
0.50...1.50
1.00

Selection sensor F4
see 
0

Software filter sensor F4
1 ... 32
8

Display at 0/4 mA and
sensor selection =7/8
-99…+999
0.0

Display at 20 mA and
sensor selection =7/8
-99…+999
100

Order no.: 900312.001 V2.0 Page 14
Para-
meter
Description of function
Setting range
Values
default

Display of weighted mean value of F1+F2
 = (* + (100-)*)/100

Weighting of sensor F1 for 
0 ... 100%
100

Password of parameter level 
-99 ... 999
-19
 Pre-defined parameter sets (password-protected)
Para-
meter
Description of function
Setting range
Values
default

Parameter set
1 ...5
1

Password for entering level selection (in
display  )
-99 ... 999 -
19

Password of parameter level 
-99 ... 999
-19
Parameter  can only be viewed and set via ST-bus.
Warning: Changes made in the parameter set will change all parameter settings.
 Networking and display (password-protected)
Para
-
meter
Description of function
Setting range
Values
default

Own address ST-bus
Identical to setting 
0: deactivated
1 ... 250
1

Temperature scale 0: °C
1: °F
0

Display mode 0: 3 digits, integers
1: 3 digits, rounded to 0.5
2: 3 digits, 0.1
3: 4 digits, integers
4: 4 digits, rounded to 0.5
5: 4 digits, 0.1
2

Display value
See act. value table
0

Software version

Display in standby mode 0: OFF
1: AUS
2: right decimal point
3: right decimal point flashing
1

Bus protocol
0: ST-Bus
1: MOD-Bus, rtu (8 data bits)
2: MOD-Bus, ascii (7 data bits)
0

Baud rate for MOD-Bus 0: 115200
1: 57600
2: 38400
3: 19200
4: 9600
5: 4800
4

Order no.: 900312.001 V2.0 Page 15
Para-
meter
Description of function
Setting range
Values
default

Parity for MOD-Bus
0: none
1: odd
2: even
2

ST bus release mask for functions
0 ... 255
249

ST bus release mask for functions
0 ... 255
255

Password of parameter level 
-99 ... 999
-19
 Relay contacts and lamps (password-protected)
Para-
meter
Description of function
Setting range
Values
default

Function relay K1
0: no function (off)
1: compressor
2: defrosting circuit 1
3: evaporator fan
4: condenser fan
5: alarm
6: control contact circuit 2
7: defrosting circuit 2
8: relay function A (light 1)
9: relay function B (light 2)
10: relay function C (window heating)
11: relay function D (door frame heat.)
12: relay function E (blade scraper)
13: relay function F
14: drip tray heating
15: buzzer
16: on if controller active
17: on if control circuit 1 active
18: on if control circuit 2 active
19: on if Set 1 active
20: on if Set 2 active
21: on if day mode active
22: on if night mode active
23: on if super-frost active
1

Function relay K2
see 
2

Function relay K3
see 
3

Function relay K4
see 
5

Function relay K5
see 
0

Function relay K6
see 
0

Function relay K7
see 
0

Function relay K8
see 
0

Order no.: 900312.001 V2.0 Page 16
Para-
meter
Description of function
Setting range
Values
default

Function LED1
0: no function (off)
1: compressor/magnetic valve
2: defrosting control circuit 1
3: evaporator fan
4: condenser fan
5: alarm
6: control circuit 2
7: defrosting circuit 2
8: Light 1
9: Light 2
10: window heating
11: blade scraper
12: door frame heating
13: relay function F
14: drip tray heating
15: "super-frost“
16: "humidity"
17: control circuit 1 active
18: control circuit 2 active
19: set 1 active
20: set 2 active
21: day mode active
22: night mode active
23: display "MIN"
24: display "MAX
3

Function LED2
see 
2

Function LED3
see 
1

Function LED4
see 
0

Function LED5
see 
19

Function LED6
see 
20

Function LED week days
0: no function (off)
1: display weekday
2: see ...
0

Function LED7 (Mo)
see 
0

Function LED8 (Tu)
see 
0

Function LED9 (We)
see 
0

Function LED10 (Th)
see 
0

Function LED11 (Fr)
see 
0

Function LED12 (Sa)
see 
0

Function LED13 (Su)
see 
0

Password of parameter level 
-99 ... 999
-19

Order no.: 900312.001 V2.0 Page 17
 Control circuit 2 (password-protected)
Para
meter
Description of function
Setting range
Values
default
 
Assignment of sensors to control circuit 2
detailed description of sensors in parameters

through

0: none
1: Sensor F1
2: Sensor F2
3: Sensor F3
4: Sensor F4
5: weighted mean value from
F1 and F2
0
 
2nd control circuit: setpoint
 ... 
10.0
 
2nd control circuit: abs. setpoint or DeltaW
0: absolute
1: DeltaW
1
 
2nd control circuit: switching mode
0: heating
1: refrigerating
1
 
2nd control circuit: hysteresis
0.1...99.0°C
2.0
 
2nd control circuit: hysteresis mode
0: symmetrical
1: one-sided
1
 
Upper setpoint limit
 ... +999°C
50.0
 
Lower setpoint limit
-99°C ... 
-50
 
Function in the case of sensor fault
0: contact off
1: contact on
1

Defrosting interval control circuit 2
0: no defrosting
1...99 hrs.
0

Defrosting time limitation thermostat 2
1...99 min.
30

Password of parameter level 
-99 ... 999
-19

Order no.: 900312.001 V2.0 Page 18
N-level (counters)
Parameters are only accessible via ST-Bus.
Para-
meter Description of function
Setting range Values
default
N0
Switching cycles of K1 (lower 16bit)
---
N1
Switching cycles of K1 (upper 16bit)
---
N2
Switching cycles of K2(lower 16bit)
---
N3
Switching cycles of K2 (upper 16bit)
---
N4
Switching cycles of K3 (lower 16bit)
---
N5
Switching cycles of K3 (upper 16bit)
---
N6
Switching cycles of K4 (lower 16bit)
---
N7
Switching cycles of K4 (upper 16bit)
---
N8
Switching cycles of K5 (lower 16bit)
---
N9
Switching cycles of K5 (upper 16bit)
---
N10
Switching cycles of K6 (lower 16bit)
---
N11
Switching cycles of K6 (upper 16bit)
---
N12
Switching cycles of K7 (lower 16bit)
---
N13
Switching cycles of K7 (upper 16bit)
---
N14
Switching cycles of K8 (lower 16bit)
---
N15
Switching cycles of K8 (upper 16bit)
---
N98
Reset counter
0: ---
1: Reset
0
N99
Password for N-level
-99 … 999
0
The number of switching cycles is calculated as follows (i.e. for K1): number =65536 * N1 + N0.
Parameter N98 resets the counters for all relays. It depends on the setting of parameter L42. The return
value is set back to “0” automatically.
T-level (operating times)
Parameters are only accessible via ST-Bus.
Para-
meter Description of function
Setting range Values
default
T10
Overall operating time (lower 16bit)
---
T11
Overall operating time (upper 16bit)
---
T12
Operating time since last reset (lower 16bit)
---
T13
Operating time since last reset (upper 16bit)
---
T14
Operating time relay “compressor” (lower 16bit)
---
T15
Operating time relay “compressor” (upper 16bit)
---
T16
Operating time relay “defrosting 1” (lower 16bit)
---
T17
Operating time relay “defrosting 1” (upper 16bit)
---
T18
Operating time relay “evaporator fan” (lower 16bit)
---
T19
Operating time relay “evaporator fan” (upper 16bit)
---
T20
Operating time relay “condenser fan” (lower 16bit)
---
T21
Operating time relay “condenser fan” (upper 16bit)
---
T22
Operating time relay “thermostat 2” (lower 16bit)
---
T23
Operating time relay “thermostat 2” (upper 16bit)
---
T24
Operating time relay “defrosting 2” (lower 16bit)
---

Order no.: 900312.001 V2.0 Page 19
T25
Operating time relay “defrosting 2” (upper 16bit)
---
T26
Operating time relay “drip tray heating” (lower 16bit)
---
T27
Operating time relay “drip tray heating (upper 16bit)
---
T28
Operating time relay - (lower 16bit)
---
T29
Operating time relay - (upper 16bit)
---
T98
Reset operating times
0: ---
1: Reset
0
T99
Password for T-level
-99 … 999
0
The operating time is calculated as follows: Operating time (in minutes) =65536 * T11 + T10.
Parameter T98 resets the counters for all operating times (except for T10 und T11). It depends on the setting
of parameter L42. The return value is set back to “0” automatically
EC-level (reserved for internal use)
This level is only accessible via ST-Bus.
MASTER PASSWORD
All passwords can be edited through
parameterisation. If you don't remember a
password, you can still parameterise the controller
and look up and/or edit the password via a master
password. To do that, follow these steps:
1. Switch off power supply (disconnect from mains
or switch off power supply unit)
2. Press buttons UP, DOWN and SET at the same
time and switch on power supply again.
3. Now, a ("Challenge") number will be displayed
for approx. 5s.
In no case disconnect the controller from power
supply now. Otherwise, the number will become
invalid. Using this number, you can call our sales
staff, phone [phone] to request the
master password ("Response"). Enter this master
password in the 1st control level in .
Important: Even if you remember the password,
you must enter the master password here. If the
password is accepted, you will enter the parameter
selection levels and all passwords will be deacti-
vated. By pressing the SET button (display )
you can switch to the relevant parameter level.
Now, the master password is no longer required.
The passwords will remain deactivated until the
controller is disconnected from power supply
again. In case you leave the parameter level now,
simply press the SET button in  in order to
access the parameter selection levels again.

Order no.: 900312.001 V2.0 Page 20
STATUS DISPLAYS AND ERROR MESSAGES
Message
Cause
Remedy

Overtemperature, temperature above
alarm limit of parameter A1/A31

Undertemperature, temperature below
alarm limit of parameter A2/A33

Error on sensor F1, short-circuit
check sensor F1

Error on sensor F1, wire broken
check sensor F1

Error on sensor F2, short-circuit
check sensor F2

Error on sensor F2, wire broken
check sensor F2

Error on sensor F3, short-circuit
check sensor F3

Error on sensor F3, wire broken
check sensor F3

Error on sensor F4, short-circuit
check sensor F4

Error on sensor F4, wire broken
check sensor F4

Door open for too long
close door

High
-pressure fault
Check: Condenser fan and check for dirt
accumulation

Low-pressure fault
Plant leaking, to little coolant

Internal error in control unit
Repair control unit

Error in parameter memory
Check all parameters

Error in data memory
Repair control unit

Error of internal clock
Set clock again. If error occurs again, the
controller must be repaired
Errors  and  will disable the controller. The controller will only be enabled again once the error has
been repaired. Error  (and ) can only be eliminated by repair. The errors and the current temperature
will be displayed alternately.