Julabo CF31 User manual

19514871-V5.doc 08.08.17
Operating Manual
Cryo-Compact Circulators
The HighTech Series
CF31
CF41
1.951.4871-V5 08/17
JULABO GmbH
77960 Seelbach / Germany
Tel. [phone] / 51-0
Fax [phone] / 24 91
[e-mail]
www.julabo.com

2
Congratulations!
You have made an excellent choice.
JULABO thanks you for the trust you have placed in us.
This operating manual has been designed to help you gain an understanding of the operation and
possible applications of our Cryo-Compact Circulators. For optimal utilization of all functions, we
recommend that you thoroughly study this manual prior to beginning operation.
The JULABO Quality Management System
Temperature control devices for research and industry are developed,
produced, and distributed according to the requirements of ISO 9001 and
ISO 14001. Certificate Registration No. 01 100044846
Unpacking and inspecting
Unpack the Cryo-Compact Circulator and accessories and inspect them for possible transport damage.
Damage should be reported to the responsible carrier, railway, or postal authority, and a damage
report should be requested. These instructions must be followed fully for us to guarantee our full
support of your claim for protecting against loss from concealed damage. The form required for filing
such a claim will be provided by the carrier.
Printed in Germany Changes without prior notification reserved
Important: keep original operating manual for future use

Cryo-Compact Circulators
3
TABLE OF CONTENTS
Operating manual ......................................................................................................................... 5
1. Intended use .......................................................................................................................... 5
1.1. Description ........................................................................................................................ 5
2. Operator responsibility – Safety instructions .......................................................................... 6
2.1. Disposal ............................................................................................................................ 7
2.2. EC Conformity ................................................................................................................... 8
2.3. Warranty conditions......................................................................................................... 10
2.4. Technical specifications................................................................................................... 11
3. Safety notes for the user ...................................................................................................... 15
3.1. Explanation of safety notes.............................................................................................. 15
3.2. Explanation of other notes ............................................................................................... 15
3.3. Safety instructions ........................................................................................................... 15
Operating instructions................................................................................................................. 18
4. Operating controls and functional elements ......................................................................... 18
5. Preparations ........................................................................................................................ 22
5.1. Installation ....................................................................................................................... 22
5.2. Temperature application to external systems................................................................... 22
5.3. Tubing ............................................................................................................................. 24
5.4. Bath fluids ....................................................................................................................... 25
6. Operating procedures .......................................................................................................... 26
6.1. Power connection............................................................................................................ 26
6.2. Filling............................................................................................................................... 26
6.3. Switching on / Selecting the language ............................................................................. 27
7. Manual operation ................................................................................................................. 28
7.1. Start - Stop ...................................................................................................................... 28
7.2. Control of the cooling machine.................................................................................... 28
7.3. Setting the temperatures ....................................................................................... 29
7.4. Safety installations, warning functions ................................................................... 30
7.4.1. Excess temperature protection............................................................................... 30
7.4.2. Early warning system, low level protection ............................................................. 33

4
8. Menu functions ...........................................................................................................34
8.1. Configuration ...................................................................................................................35
8.2. Control.............................................................................................................................39
8.3. Start of a profile ...............................................................................................................43
8.3.1. Edit after start .........................................................................................................45
8.3.2. Interrupting a profile................................................................................................47
8.3.3. Interruption after a power failure .............................................................................47
8.3.4. Termination of a profile...........................................................................................48
8.4. Integrated programmer ....................................................................................................49
8.5. Analog inputs/outputs ......................................................................................................52
8.5.1. REG+E-PROG – temperature recorder outputs......................................................54
8.5.2. REG+E-PROG - programmer input ........................................................................55
8.5.3. STAND-BY input....................................................................................................57
8.5.4. ALARM output .......................................................................................................58
8.6. Limits ...............................................................................................................................59
8.7. Serial interface.................................................................................................................61
8.8. ATC Absolute Temperature Calibration, 3-point calibration..............................................62
8.9. Setting the pump pressure...............................................................................................65
9. Troubleshooting guide / Error messages ..............................................................................66
10. Electrical connections...........................................................................................................69
11. Remote control.....................................................................................................................71
11.1. Setup for remote control ..................................................................................................71
11.2. Communication with a PC or a superordinated data system ............................................71
11.3. List of commands.............................................................................................................72
11.4. Status messages .............................................................................................................75
11.5. Error messages ...............................................................................................................76
12. JULABO Service – Online remote diagnosis ........................................................................77
13. Installation of electronic module ...........................................................................................78
13.1. Draining ...........................................................................................................................78
14. Cleaning / repairing the unit..................................................................................................79

Cryo-Compact Circulators
5
Operating manual
1. Intended use
JULABO Cryo-Compact Circulators have been designed for temperature application to specific fluids in
a bath tank. The units feature pump connections for temperature control of external systems (loop
circuit).
JULABO circulators are not suitable for direct temperature control of foods, semi-luxury
foods and tobacco, or pharmaceutical and medical products. Direct temperature control
means unprotected contact of the object with the bath medium (bath fluid).
1.1. Description
ICC
TCF
ATC3
RS232
RS485
Pt100
PUMP
SMART
The Cryo-Compact circulators are operated via the splash-proof keypad. The
implemented microprocessor technology allows to set and to store different values
that can be indicated on the VFD COMFORT-DISPLAY and LCD DIALOG-
DISPLAY. Three menu keys facilitate adjusting setpoints, warning and safety
functions and menu functions.
The integrated programmer allows storing and running temperature and time-
dependent processes.
The control electronics including “ICC - Intelligent Cascade Control“ automatically
adapts the heat supplied to the thermal requirements of the bath.
The TCF -Temperature Control Features allow the user to have access to all
important temperature control parameters. This means: Full control on the control
mode and the chance to manually adjust or adapt control to the specific application.
Absolute Temperature Calibration (ATC3). With the 3-point calibration an offset is
adjusted at three temperatures to ensure an accurate temperature pattern at the
selected spot in the bath over the full temperature range.
Electrical connections:
The serial interface, switchable from RS232 to RS485, allows modern process
technology without additional interface.
Connection for Pt100 external sensor for external temperature measurement and
control.
Alarm output for external alarm message or control of JULABO refrigerating baths
or solenoid valve (cooling water).
The electronic module (option) provides 3 further analog connections (alarm input,
standby input, recorder output, programmer input).
The excess temperature protection conforming to IEC 61010-2-010 is a safety
installation independent from the control circuit. This protection can be indicated
and set on the LCD DIALOG-DISPLAY.
The early warning system for low level signals that bath fluid needs to be refilled
before the low level protection conforming to IEC 61010-2-010 causes a complete
shut-down of the main functional elements.
Intelligent pump system: The pump capacity (electronically adjustable via the motor
speed) enables to adapt to varying conditions for internal and external temperature
applications..

Operator responsibility – Safety instructions
6
2. Operator responsibility – Safety instructions
The products of JULABO ensure safe operation when installed, operated, and maintained according to
common safety regulations. This section explains the potential dangers that may arise when operating
the circulator and also specifies the most important safety precautions to preclude these dangers as far
as possible.
The operator is responsible for the qualification of the personnel operating the units.
The personnel operating the units should be regularly instructed about the dangers involved with
their job activities as well as measures to avert these dangers.
Make sure all persons tasked with operating, installing, and maintaining the unit have read and
understand the safety information and operating instructions.
When using hazardous materials or materials that could become hazardous, the circulator may be
operated only by persons who are absolutely familiar with these materials and the circulator. These
persons must be fully aware of possible risks.
If you have any questions concerning the operation of your unit or the information in this manual,
please contact us!
Contact:JULABO GmbH
Gerhard-Juchheim-Strasse 1
77960 Seelbach / Germany
Tel. [phone] / 51-0 [email protected]
Fax [phone] / 24 91 www.julabo.com
Safety instructions for the operator:
Avoid strikes to the housing, vibrations, damage to the operating-element panel (keypad, display),
and contamination.
Make sure the product is checked for proper condition regularly (depending on the conditions of
use). Regularly check (at least every 2 years) the proper condition of the mandatory, warning,
prohibition and safety labels.
Make sure that the mains power supply has low impedance to avoid any negative effects on the
instruments being operated on the same mains.
This unit is designed for operation in a controlled electromagnetic environment. This means that
transmitting devices (e.g., cellular phones) should not be used in the immediate vicinity.
Magnetic radiation may affect other devices with components sensitive to magnetic fields (e.g.,
monitors). We recommend maintaining a minimum distance of 1 m.
Permissible ambient temperature: max. 40 °C, min. 5 °C.
Permissible relative humidity: 50% (40 °C).
Do not store the unit in an aggressive atmosphere. Protect the unit from contamination.
Do not expose the unit to sunlight.
Appropriate operation
Only qualified personnel is authorized to configure, install, maintain, or repair the circulator.
Persons who operate the circulator must be trained in the particular tasks by qualified personnel. The
summarized user guidance (short manual) and the specification table with information on individual
parameters are sufficient for this.
Use
The bath can be filled with flammable materials. Fire hazard!
There might be chemical dangers depending on the bath medium used.
Observe all warnings for the used materials (bath fluids) and the respective instructions (safety data

Cryo-Compact Circulators
7
sheets).
Insufficient ventilation may result in the formation of explosive mixtures. Only use the unit in well
ventilated areas.
Only use recommended materials (bath fluids). Only use non-acid and non corroding materials.
When using hazardous materials or materials that could become hazardous, the operator must affix
the enclosed safety labels (1 + 2) to the front of the unit so they are highly visible:
1
Warning label W00: Colors: yellow, black
Danger area. Attention! Observe instructions.
(operating manual, safety data sheet)
2
or
Mandatory label M018: Colors: blue, white
Carefully read the user information prior to beginning operation.
Scope: EU
2
Semi S1-0701 Table A1-2 #9
Carefully read the user information prior to beginning operation.
Scope: USA, NAFTA
Particular care and attention is necessary because of the wide operating range.
There are thermal dangers: Burn, scald, hot steam, hot parts and surfaces that can be touched.
Warning label W26: Colors: yellow, black
Hot surface warning.
(The label is put on by JULABO)
Warning label W017: Colors: yellow, black
Low temperature warning.
(The label is put on by JULABO)
Observe the instructions in the manuals for instruments of a different make that you connect to the
circulator, particularly the corresponding safety instructions. Also observe the pin assignment of plugs
and technical specifications of the products.
2.1. Disposal
The product may be used with oil as bath fluid. These oils fully or partially consist of mineral oil or
synthetic oil. For disposal, follow the instructions in the material safety data sheets.
This unit contains the refrigerants R-404A, and R-134a, which at this time are not considered harmful
to the ozone layer. However, over the long operating period of the unit, disposal rules may change.
Therefore, only qualified personnel should handle the disposal.
Valid in EU countries
See the current official journal of the European Union – WEEE directive.
Directive of the European Parliament and of the Council on waste electrical and
electronic equipment (WEEE).
This directive requires electrical and electronic equipment marked with a crossed-
out trash can to be disposed of separately in an environmentally friendly manner.
Contact an authorized waste management company in your country.
Disposal with household waste (unsorted waste) or similar collections of municipal
waste is not permitted!

Operator responsibility – Safety instructions
8
2.2. EC Conformity

Cryo-Compact Circulators
9

Operator responsibility – Safety instructions
10
2.3. Warranty conditions
JULABO GmbH warrants its products against defects in material or in workmanship, when used under
appropriate conditions and in accordance with appropriate operating instructions
for a period of ONE YEAR.
Extension of the warranty period – free of charge
With the ‘1PLUS warranty’ the user receives a free of charge extension to the warranty of up to 24
months, limited to a maximum of 10 000 working hours.
To apply for this extended warranty the user must register the unit on the JULABO web site
www.julabo.com, indicating the serial no. The extended warranty will apply from the date of JULABO
GmbH’s original invoice.
JULABO GmbH reserves the right to decide the validity of any warranty claim. In case of faults arising
either due to faulty materials or workmanship, parts will be repaired or replaced free of charge, or a
new replacement unit will be supplied.
Any other compensation claims are excluded from this guarantee.

Cryo-Compact Circulators
11
2.4. Technical specifications
CF31
Working temperature range
°C
-30 ... +200
Temperature stability
°C
±0.02
Temperature selection
digital
via keypad
indication on LCD DIALOG-DISPLAY (°C/°F)
remote control via personal computer
indication on monitor
Temperature indication:
VFD COMFORT-DISPLAY
Resolution
°C
0.01
Pump pressure stage
indication on VFD COMFORT-DISPLAY
Temperature control
ICC - Intelligent Cascade Control
Working temperature sensor
Pt 100
Safety temperature sensor
Pt 100
Absolute Temperature Calibration
at internal control
°C
±3
at external control
°C
±10
Heater wattage (at 230 V)
kW
2,0
Heater wattage (at 115 V)
kW
1,0
Cooling capacity
°C
20 0 -20
Medium ethanol
kW
0.32 0.25 0.15
Cooling compressor
1-stage
Refrigerant
R134a
Cooling machine
Air-cooled
Electrical connections: see page 13
Electronically adj. pump capacity
1 ... 4 stages
Flow rate min ... max. at 0 bar
l/min
22 ... 26
Pressure max. at 0 liter
bar
0,7
Suction max at 0 liter
bar
0,4
Bath opening (WxL)
cm
16x3
Bath depth
cm
14
Filling volume
liters
2.0 ... 3.0
Overall dimensions (WxDxH)
cm
24x46x40
Weight
kg
35
Ambient temperature
°C
5 ... 40
Protection class according to IEC 60 529
IP 21
Mains power connection 230 V/50 Hz
V/ Hz
207-253 / 50
Current draw (at 230 V)
A
11
Mains power connection 230 V/60 Hz
V/ Hz
207-253 / 60
Current draw (at 230 V)
A
12
Mains power connection 115 V/60 Hz
V/ Hz
103-127 / 60
Current draw (at 115 V)
A
14
All measurements have been carried out at: rated voltage and frequency ambient temperature: 20 °C
Technical changes without prior notification reserved.

Operator responsibility – Safety instructions
12
CF41
Working temperature range
°C
-40 ... +200
Temperature stability
°C
±0.02
Temperature selection
digital
via keypad
indication on LCD DIALOG-DISPLAY (°C/°F)
remote control via personal computer
indication on monitor
Temperature indication:
VFD COMFORT-DISPLAY
Resolution
°C
0.01
Pump pressure stage
indication on VFD COMFORT-DISPLAY
Temperature control
ICC - Intelligent Cascade Control
Working temperature sensor
Pt 100
Safety temperature sensor
Pt 100
Absolute Temperature Calibration
at internal control
°C
±3
at external control
°C
±10
Heater wattage (at 230 V)
kW
2,0
Heater wattage (at 115 V)
kW
1,0
Cooling capacity
°C
20 0 -20 -30
Medium ethanol
kW
0.47 0.4 0.28 0.12
Cooling compressor
1-stage
Refrigerant
R404A
Cooling machine
Air-cooled
Electrical connections: see page 13
Electronically adj. pump capacity
1 ... 4
Flow rate min ... max. at 0 bar
l/min
22 ... 26
Pressure max. at 0 liter
bar
0,7
Suction max at 0 liter
bar
0,4
Bath opening (WxL)
cm
19x3
Bath depth
cm
19
Filling volume
Liter
4.0 ... 5.5
Overall dimensions (WxDxH)
cm
28x46x46
Weight
kg
42
Ambient temperature
°C
5 ... 40
Protection class according to IEC 60 529
IP 21
Mains power connection 230 V/50 Hz
V/ Hz
207-253 / 50
Current draw (at 230 V)
A
13
Mains power connection 230 V/60 Hz
V/ Hz
207-253 / 60
Current draw (at 230 V)
A
13
Mains power connection 115 V/60 Hz
V/ Hz
103-127 / 60
Current draw (at 115 V)
A
16
All measurements have been carried out at: rated voltage and frequency ambient temperature: 20 °C
Technical changes without prior notification reserved.

Cryo-Compact Circulators
13
Electrical connections:
Computer interface RS232 / RS485
External sensor Pt100
Optional: (Order No. 8900100 Electronic module with analog connections)
Programmer input -100 °C to 400 °C = 0 - 10 V or 0 - 20 mA or 4 - 20 mA
Input for the signal of a flow meter or external manipulated variable
Temperature recorder outputs 0 - 10 V (0 V = -100 °C, 10 V = 400 °C)
0 - 20 mA (0 mA = -100 °C, 20 mA = 400 °C)
4 - 20 mA (4 mA = -100 °C, 20 mA = 400 °C)
Standby input for external emergency switch-off
Alarm output for external alarm signal
Warning functions and safety installations
Excess temperature protection adjustable from 0 °C ... 220 °C
Low liquid level protection float switch
Early warning system for low level float switch
Classification according to DIN 12876-1 class III
Alarm message optical + audible (permanent)
Warning message optical + audible (in intervals)
Overload protection for compressor and pump motor
High temperature warning function optical + audible (in intervals)
Low temperature warning function optical + audible (in intervals)
Supervision of working sensor plausibility control
Reciprocal sensor monitoring between
working and safety sensors difference >35 K
Environmental conditions according to IEC 61 010-1:
Use indoors only.
Altitude up to 2000 m - normal zero.
Ambient temperature: see Technical specifications
Humidity:
Max. relative humidity 80% for temperatures up to +31 °C,
linear decrease down to 50% relative humidity at a temperature of +40 °C
Max. mains voltage fluctuations of ±10% are permissible.
Protection class according to IEC 60 529 IP21
The unit corresponds to Class I
Overvoltage category II
Pollution degree 2
Caution:
The unit is not suitable for use in explosive atmosphere
EMC requirements according to EN 61326-1
The device is an ISM device of group 1 per CISPR 11 (uses HF for internal purposes) and is
classified in class A (industrial and commercial sector).
Note!
•
Devices of class A are intended for the use in an industrial electromagnetic
environment.
•When operating in other electromagnetic environments, their
electromagnetic compatibility may be impacted.

Operator responsibility – Safety instructions
14
Information about the used refrigerants
The Regulation (EU) No. 517/2014 on fluorinated greenhouse gases applies to all systems which
contain fluorinated refrigerants and replaces (EC) 842/2006.
The aim of the Regulation is to protect the environment by reducing emissions of fluorinated
greenhouse gases.
Among other things it regulates the emission limits, use and recovery of these substances. It also
contains requirements for operators of systems which require / contain these substances to function.
Under Regulation 517/2014, the operator of a system of this nature has the following duties:
•The operator must ensure that the equipment is checked at regular intervals for leaks.
•These intervals depend on the CO2equivalent of the system. This is calculated from the
refrigerant fill volume and type of refrigerant. The CO2equivalent of your system is shown on
the model plate.
•The operator undertakes to have maintenance, repair, service, recovery and recycling work
carried out by certified personnel who have been authorized by JULABO.
•All such work must be documented. The operator must keep records and archive them for at
least five years. The records must be submitted to the relevant authority on request.
Refer to the text of the Regulation for further information.

Cryo-Compact Circulators
15
3. Safety notes for the user
3.1. Explanation of safety notes
In addition to the safety warnings listed above, warnings are posted throughout the
manual. These warnings are designated by an exclamation mark inside an equilateral
triangle. “Warning of a dangerous situation (Attention! Please follow the
documentation).”
The danger is classified using a signal word.
Read and follow these important instructions.
Warning:
Describes a possibly highly dangerous situation. If these instructions are not followed,
serious injury and danger to life could result.
Caution:
Describes a possibly dangerous situation. If this is not avoided, slight or minor injuries
could result. A warning of possible property damage may also be contained in the text.
Notice:
Describes a possibly harmful situation. If this is not avoided, the product or anything in
its surroundings can be damaged.
3.2. Explanation of other notes
Note!
Draws attention to something special.
Important!
Indicates usage tips and other useful information.
3.3. Safety instructions
Follow the safety instructions to avoid personal injury and property damage. Also, the valid
safety instructions for workplaces must be followed.
•Only connect the unit to a power socket with an earthing contact (PE – protective
earth)!
•The power supply plug serves as a safe disconnecting device from the line and
must always be easily accessible.
•Place the unit on an even surface on a base made of nonflammable material.
•Do not stay in the area below the unit.
•Make sure you read and understand all instructions and safety precautions listed
in this manual before installing or operating your unit.
•Set the excess temperature safety installation below the flash point of the bath
fluid.
•Never operate the unit without bath fluid in the bath.
•Pay attention to the thermal expansion of bath oil during heating to avoid
overflowing of the fluid.

Safety notes for the user
16
•Prevent water from entering the hot bath oil.
•Do not drain the bath fluid while it is hot!
Check the temperature of the bath fluid prior to draining (e.g., by switching the
unit on for a short moment).
•Use suitable connecting tubing.
•Avoid sharp bends in the tubing, and maintain a sufficient distance from
surrounding walls.
•Make sure that the tubing is securely attached.
•Regularly check the tubing for material defects (e.g., for cracks).
•Never operate damaged or leaking units.
•Always turn off the unit and disconnect the mains cable from the power source
before performing any service or maintenance procedures, or before moving the
unit.
•Always turn off the unit and disconnect the mains cable from the power source
before cleaning the unit.
•Always empty the bath before moving the unit.
•Transport the unit with care.
•Sudden jolts or drops may cause damage in the interior of the unit.
•Observe all warning labels.
•Never remove warning labels.
•Never operate units with damaged mains power cables.
•Repairs are to be carried out only by qualified service personnel.
•Some parts of the bath tank and the pump connections may become extremely
hot during continuous operation. Therefore, exercise particular caution when
touching these parts.
•Some parts of the bath tank and the pump connections may become extremely
cold during continuous operation. Therefore, exercise particular caution when
touching these parts.
Caution:
The circulator may be used, for example, to control the temperature of fluids in a
reactor.
We do not know what substances are contained in these vessels.
Many substances are:
•inflammable, easily ignited, or explosive
•hazardous to health
•environmentally hazardous
i.e.: dangerous
The user alone is responsible for the handling of these substances!

Cryo-Compact Circulators
17
The following questions should help to recognize possible dangers and to reduce the
risks to a minimum.
•Are all tubes and electrical cables connected and layed?
Note:
sharp edges, hot surfaces in operation, moving machine parts, etc.
•Do dangerous vapors or gases develop during heating?
Must the work be done in a fume hood?
•What to do when a dangerous substance was spilled on or in the unit?
Before starting to work, obtain information concerning the substance and
determine the method of decontamination.
Notice:
Check the safety installations at least twice a year!
•Excess temperature protection according to IEC 61010-2-010
With a screwdriver, turn back the adjustable excess temperature protection until
the shutdown point (actual temperature).
•Low level protection according to IEC 61010-2-010
To check the function of the float, it can be manually lowered with a screwdriver,
for example.

Operating instructions
18
Operating instructions
4. Operating controls and functional elements
Front view CF41 / CF31 Rear view CF41/ CF31
8b
ext
Pt100
SERIAL
ALAR
REG
E-
OG
STAND-
T16A
T16A
9
10
11
12
13
14
15
16
17
T16A
T16A
8b
15
16
17
14
ext
Pt100
SERIAL
ALAR
REG
E-
OG
STAND-
9
10
11
12
13

Cryo-Compact Circulators
19
1
Mains power switch, illuminated
2
°C
140
100
180
220
0
60
20
Adjustable excess temperature protection according to
IEC 61010-2-010
3
Setpoint1: 150.00°C
IntAct : 148.53°C
Power : 80 %
Control : intern
RS232 : 150.00°C
ExtAct : 145.30°C
Power : 80 %
Control : extern
LCD DIALOG-DISPLAY
Line 1: Setpoint and origin of setpoint programming
(Key / RS232 or RS485 / ext. Pt100 / EProg)
Line 2: Actual value - internal or external,
identical to line 1 of the VFD-COMFORT-DISPLAY
Line 3: Heating capacity in %.
Line 4: Control type: internal / external
4
VFD-COMFORT-DISPLAY
Header: Control indicators see sections 4.1 and 4.2
Line 1: Actual valueinternal or external
The display is depending on the selected control mode in the
menu > Control < (internal or external).
Line 2: Working temp. setpoint, constantly S xxx.xx
Line 3: Actual value (E = external or I = internal)
Alternating with the display in line 1
Use the keys to indicate further values in line 3. However,
the functions of these keys are different with the programmer
started.
PI Capacity in % - with manipulated variable set to >control<*
PS Capacity in % - with manipulated variable set to >serial<* or
>eprog<*
H Heater capacity in Watts
U Mains voltage Volts
F Flow rate in liters/minute
(providing EPROG input set to >Flowrate<)
*see >Configuration> page 35
4.1
Control indicators in the header:
Heating / Cooling / Alarm /
Remote control
4.2
Control indicators in the header:
Temperature indication Internal or External actual value
Temperature indication in °C or °F (see page 38)

Operating controls and functional elements
20
4.3
Display for the adjusted pump pressure stage in the -OFF- mode.
Display for the effective pump pressure stage (rotation speed) after
start.
Four stages, adjustable via the button, in the menu >PUMP<.
4.4
Segment at bottom blinks: Standstill of compressor
(compressor protection device, page 28)
5
Keypad 1
Start / stop key
Key for selecting the working temperature - Setpoint 1, 2, 3
Key for selecting the warning and safety values
MENU key - for selecting the menu functions
Cursor keys (left or right)
Edit keys (increase or decrease)
Enter key 1) Store value / parameter
2) Next lower menu level
Escape key 1. Cancel entries
2. Return to a higher menu level
6
Keypad 2
.. Numeral keypad: numerals 0 to 9
minus / decimal point
F key: Shows the help text in the
LCD DIALOG-DISPLAY when alarm messages appear.
7
Drain port
8a
8b
Handle: front
Handle: rear