Knauer Azura CT 2.1 Operating instructions

Column Thermostat CT 2.1
Service Instructions
Document no. VSM-020
HPLCHPLC

Note: For your own safety, read the instructions and observe the
warnings and safety information on the device and in the instructions.
Keep the instructions for future reference.
Phone: [phone] (9-17h, Central European Time)
Fax: [phone]
E-Mail: [e-mail]
Languages: German, English
KNAUER Wissenschaftliche Geräte GmbH
Hegauer Weg 38
14163 Berlin
Germany
Phone: [phone]
Fax: [phone]
Internet: www.knauer.net
E-Mail: [e-mail]
Article number: VSM-020
Version number: 1.0
Last update: 2020/09/22
This document contains confidential information and may not be
reproduced without written consent of KNAUER Wissenschaftliche
Geräte GmbH.
© KNAUER Wissenschaftliche Geräte GmbH 2020
All rights reserved.
AZURA® is a registered trademark of
KNAUER Wissenschaftliche Geräte GmbH.
Technical Support:
Publisher:
Version information:
The information in this document is subject
to change without prior notice.
For latest version of the instructions, check our website:
www.knauer.net/service-instructions
Legal information:

Table of contents
AZURA® CT 2.1 Service Instructions VSM-020
Table of contents
1. General .....................................................................4
1.1 About these service instructions ..........................................4
1.2 Signal words ...........................................................4
1.3 Additional typographical conventions .....................................5
1.4 Legal information .......................................................5
1.4.1 Liability limitation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.2 Warranty conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.3 Warranty seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.4 Declaration of conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2. Safety instructions and authorization for service technicians .......................7
2.1 Qualification of the service technician .....................................7
2.2 Service request form and decontamination report...........................8
3. Device view .................................................................9
4. Calibrating CT 2.1 manually ..................................................10
4.1 Temperature measurement .............................................10
4.2 Calibrating CT 2.1 manually via Service tool ...............................11
5. Door ......................................................................14
5.1 Door of CT 2.1 ........................................................14
5.1.1 Removing the door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1.2 Installing the door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1.3 Exchanging the door trim. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2 Exchanging the door seals ..............................................18
6. Removing the fan plate ......................................................19
7. Changing the heat/cool element ............................................. 20
7.1 Removing rear plate of the device........................................20
7.2 Removing side panels of the device ......................................22
7.3 Disassembling the heat/cool element.....................................24
7.4 Installing the new heat/cool element .....................................26
7.5 Remounting the side panels of the device .................................29
7.6 Remounting the rear plate of the device ..................................31

Table of contents
AZURA® CT 2.1 Service Instructions VSM-020
8. Replacing the leak sensor ................................................... 33
8.1 Removing the leak sensor...............................................33
8.2 Installing the new leak sensor ...........................................35
9. Adjusting the leak sensor ................................................... 36
10. Firmware updates.......................................................... 37
11. Spare parts................................................................ 38

4 General
AZURA® CT 2.1 Service Instructions VSM-020
1. General
1.1 About these service instructions
This document is an addition to the user instruction of the device. It inclu-
des all work that requires the opening of the device, installation of certain
components and maintenance work.
The service instructions enable the safe and ecient operation of the
device. The service technician must have carefully read and understood
this service instructions before starting any work.
The basic prerequisite for safe operation is compliance with all safety
instructions (see chapter „Safety instructions and authorization for
service technicians“ auf Seite 6). In addition to the safety and warning
instructions in these service instructions, the local accident prevention
regulations and the national industrial safety regulations apply.
Observe the following:
All safety instructions in the service instructions
All safety instructions in the user instructions
The environmental, installation and connection specifications in the
user instructions
Only use spare parts, tools and cleaning agents recommended or
prescribed by KNAUER.
Observe the RoHS conformity for mainboards! Never perform mainte-
nance on the mainboards independently. Always replace the mainboards
and return the defective boards to KNAUER technical support, otherwise
he warranty will lapse.
1.2 Signal words
Possible dangers related to the device are distinguished in personal and
material damages.
Symbol Meaning
DANGER (red) indicates a highly hazardous situa-
tion. If not avoided, it will result in death or serious
injury.
WARNING (orange) indicates a hazardous situation.
If not avoided, it could result in death or serious
injury.
CAUTION (yellow) indicates a moderate hazardous
situation. If not avoided, it could result in minor or
moderate injury.
NOTICE (blue) is used to address issues which are
not related to physical injury.
What must be taken
into account?
Do not perform repairs
on the mainboard

General 5
AZURA® CT 2.1 Service Instructions VSM-020
1.3 Additional typographical conventions
General equal treatment: When persons are described, this document
uses the male grammar form to keep the text easy to read. The form
has a neutral sense and speaks to people of any gender in the same
way.
Note: Specific information are prefixed with the word “Note” and an
information icon.
Note: This is an example.
1.4 Legal information
1.4.1 Liability limitation
The manufacturer is not liable for the following issues:
Non-compliance of these instructions
Non-observance of necessary safety precautions
Improper use
Operation of the device by unqualified personnel (see chapter
„Qualification of the service technician“ auf Seite 6)
Use of non-approved spare parts
Technical changes by the service technician such as unauthorized
modifications
Violations of General Terms and Conditions (GTC)
1.4.2 Warranty conditions
For information on warranty please refer to our general terms and
conditions on the website: https://www.knauer.net/terms.
1.4.3 Warranty seal
The warranty seal is a security label which indicates
if any opening on instrument has occurred. Most
KNAUER products are sold with the blue seal on the
rear side to confirm that KNAUER was the last who
took care of the instrument.
An authorized service technician must order and ax
the orange warranty seal after opening the instrument
(order no. V0602) in the same place. If unauthorised
persons tamper with the device or if the seal is dam-
aged, the warranty will lapse.
1.4.4 Declaration of conformity
The declaration of conformity is enclosed as a separate document with
the product and can be obtained online:
www.knauer.net/en/Support/Declarations-of-conformity.

6 Safety instructions and authorization for service technicians
AZURA® CT 2.1 Service Instructions VSM-020
2. Safety instructions and authorization for
service technicians
The device has been developed and constructed in such a way that
hazards arising from its intended use are largely excluded. Nevertheless,
the following safety instructions must be observed in addition to the
basic safety instructions in the user instructions in order to avoid residual
hazards.
The following applies for all repairs on the device:
Electric shock
Danger of electric shock from voltage-carrying parts inside the
device. The housing serves as a protective cover against voltages
inside the device.
ÎSwitch the device o before opening the device.
ÎPull the power plug.
2.1 Qualification of the service technician
These service instructions are intended for the following professional
groups:
Task Authorized
Maintenance KNAUER service technicians
Service technicians authorized by KNAUER
who have completed a service training
Level 2
Repair KNAUER service technicians
Service technicians authorized by KNAUER
who have completed a service training
Level 3
If you do not belong to one of these professional groups, you must
under no circumstances carry out the work described in this instruction.
The service technician is qualified to handle the device if all of the
following points apply:
Fluent English to be able to use the English-language service software
and online help.
Knowledge about the properties of the used solvents and their health
risks.
Protective measures
against any dangers
Electronic defect
Electrostatic discharge can destroy the electronics.
ÎWear a protective bracelet against electrostatic discharge and ground.
Who may perform
repairs?

Safety instructions and authorization for service technicians 7
AZURA® CT 2.1 Service Instructions VSM-020
Due to technical training and experience, the service technician can
understand and carry out all the work described in the service instruc-
tions and recognize and avoid possible dangers independently.
The ability of the technician to react is not impaired by the consump-
tion of drugs, alcohol or medication.
2.2 Service request form and decontamination
report
We advise you not to repair devices which are not accompanied by the
completed document “Service request form and decontamination report”
(www.knauer.net/decontamination-report).

8Device view
AZURA® CT 2.1 Service Instructions VSM-020
3. Device view
1
Cartridge for eluent
pre-tempering (optio-
nal)
2
Door
3
Housing
4
Column holder
5
Fan
6
Temperature sensor
7
Column (not included
with the delivery)
8
Leak sensor
1
4
2
3
5
6
7
8
Fig. 1: Front view

Calibrating CT 2.1 manually 9
AZURA® CT 2.1 Service Instructions VSM-020
4. Calibrating CT 2.1 manually
Hand-held digital thermometer like SIKA MH 3750
KNAUER Service tool
4.1 Temperature measurement
Procedure Figure
1. Open the front door.
2. Insert the thermometer
probe right next to the
temperature sensor
using a column fixture
1.
3. Close the front door.
4. Turn on the column
thermostat.
Fig. 2: Inside view of the device
5. Enter a temperature
of 30°C in the status
window of the Service
tool and wait for at
least 30min to equili-
brate the temperature.
6. Note at least 3 values
over a time period of
3 min and average
these three values.
7. Repeat steps 5 and 6 at
10°C and 60°C.
Fig. 3: Enter a temperature in the
status window
After entering the averaged values of three or more measurements per
temperature the Service tool will provide the temperature values that are
needed in 4.2.
Tool
1
Result

10 Calibrating CT 2.1 manually
AZURA® CT 2.1 Service Instructions VSM-020
4.2 Calibrating CT 2.1 manually via
Service tool
Note: Not all three temperatures have to be entered if only one or two
require correction.
KNAUER Service tool
Procedure Figure
1. Open KNAUER Service tool
finder, select the oven and
establish connection to the
instrument.
Fig.4 Open Service tool finder
2. Enter service mode by enter-
ing service password.
Fig.5 Enter service mode
Tool

Calibrating CT 2.1 manually 11
AZURA® CT 2.1 Service Instructions VSM-020
Procedure Figure
3. Enter the average values of
the temperature measure-
ments acquired as described
in chapter 4.1 and press
“recalculate” button.
Note: If the heat/cool
element has been changed as
described in chapter 7, please
press “Set Defaults” before you
enter new temperature values.
Fig.6 Enter averaged temperature values
4. Correction values will be
calculated automatically
and will appear under Temp
Correction.
Fig.7 Calculated correction values

12 Calibrating CT 2.1 manually
AZURA® CT 2.1 Service Instructions VSM-020
Procedure Figure
5. Send values by pressing the
red arrow on left hand side of
the window and click “Write
information for current view
into the device”.
Fig.8 Sending values
Calibration has been completed.
Result

13Door
AZURA® CT 2.1 Service Instructions VSM-020
5. Door
5.1 Door of CT 2.1
5.1.1 Removing the door
The device has been switched off.
The power plug has been removed.
Phillips-head screwdriver 2.5 mm
Process Figure
Procedure 1. Loosen and remove
both screws 1on
the upper retaining
plate 2 of the door.
2. Loosen and remove
both screws on the
lower retaining
plate of the door.
Fig. 9: Screws of retaining plate
3. Twist the lower
retaining plate of
the door.
1
Fig. 10: Lower retaining plate
Prerequisites
Tool
1
2

14Door
AZURA® CT 2.1 Service Instructions VSM-020
4. Use a screwdriver
and push in the
hinge
5. Remove the door
6. Be careful and fix
the retaining plate
of the door so it
cannot fall down.
Fig. 11: Remove door
7. Safely store the 2
white washers (one
at the top and one
at the bottom side
of the door)
Fig. 12: Washer
Install the door.
Next step

15Door
AZURA® CT 2.1 Service Instructions VSM-020
5.1.2 Installing the door
The device has been switched off.
The power plug has been removed.
The door has been removed.
Phillips-head screwdriver 2.5 mm
Process Figure
Procedure 1. Reinstall the upper
retaining plate 1of
the door by tight-
ening both screws
2.
2. Repeat step 1 to
reinstall the lower
retaining plate.
Note: Fix the screws in
such a way that the flat
head screws have
enough room.
Fig. 13: Tightening screws
3. Put the washer back
on the hinge pin of
one side of the door
4. Reinstall this side of
the door by pushing
the hinge pin of the
retaining plate with
the washer in the
hinge.
Fig. 14: Door with hinge pin
5. Put the washer back
on the hinge pin of
the second side of
the door.
6. Reinstall the second
side of the door by
pushing the hinge
pin in the door until
stop and push the
door in the right
direction and the
hinge pin in the
hinge. Fig. 15: Push washer back to hinge
Bring the device into operation.
Prerequisites
Tool
1
2
Next step

16Door
AZURA® CT 2.1 Service Instructions VSM-020
5.1.3 Exchanging the door trim
The device has been switched off.
The power plug has been removed.
The door has been removed.
Cross-head screwdriver 1.5 mm
Flat screwdriver
Process Figure
Procedure 1. Loosen the five
cross-head screws
1at the door trim.
1
Fig. 16: Screws on the door trim
2. Carefully lift the
door trim 2with a
flat screwdriver and
remove.
Note: Do not exert
too much force when
removing the door
trim because the foam
might be damaged.
2
Fig. 17: Removed door with screws removed
from the trim
Install the new door trim in reverse order.
Prerequisite
Tool
Next steps

17Door
AZURA® CT 2.1 Service Instructions VSM-020
5.2 Exchanging the door seals
The device has been switched off.
The power plug has been removed.
The door has been removed.
Scissors
Process Figure
Procedure 1. Remove the three
parts of the door
seal manually.
2. Measure the
amount of seal that
is needed on the
door.
3. Cut the three parts
of the new door
sealing and press in
manually.
Fig. 18: Removed door seal
Fig. 19: Attached door seal
Bring the device into operation.
Prerequisite
Tool
Next steps

18Removing the fan plate
AZURA® CT 2.1 Service Instructions VSM-020
6. Removing the fan plate
The device has been switched off.
The power plug has been pulled.
Phillips-head screwdriver 2 mm
Note: To prevent the fan from the falling out, it is recommended to place
the device on its side.
Process Figure
Procedure 1. Remove the tem-
perature sensor 5
from the column
fixture 4.
2. Loosen the 4
screws3on the fan
plate2.
3. Carefully, lift o the
fan grating 1.
4. Remove the fan
plate.
2
3
1
5
4
Fig. 20: Fan plate
The fan plate has been removed.
Install new fan plate in reverse order.
Hot surface
Danger of burns from 185 °F ( 85 °C) hot surfaces in the column com-
partment.
ÎWear protective gloves.
Prerequisite
Tool
Result
Next steps

19Changing the heat/cool element
AZURA® CT 2.1 Service Instructions VSM-020
7. Changing the heat/cool element
7.1 Removing rear plate of the device
The device has been switched off.
The power plug has been removed.
Torx screwdriver T10
Process Figure
1. Loosen the 6 Torx screws.
Fig. 21 Loosen the screws with a
Torx screwdriver
Prerequisite
Tools
Electronic defect
Performing maintenance tasks on a switched on device can cause da-
mage to the device.
ÎSwitch off the device
ÎPull the power plug.
Electronic defect
Electrostatic discharge can destroy the electronics.
ÎWear a protective bracelet against electrostatic discharge and ground.