Hermle Z-206A Service manual
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SERVICE INSTRUCTION Z 206 A
© HERMLE Labortechnik GmbH
Service Instruction
for
Small Centrifuge
Z 206 A
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SERVICE INSTRUCTION Z 206 A
© HERMLE Labortechnik GmbH
5 TECHNICAL DATA
5.1 Acceleration times
5.2 Deceleration times
5.3 Imbalance shut off data
6 SERVICE INSTRUCTIONS
6.1 General technical description
6.2 Electrical und electronical components
6.2.1 Power- / Control board
6.2.2 Transformer
6.2.3 Control panel
6.2.4 Rotor recognition and over speed protection
6.2.5 speed signal
6.2.6 Lid contact
6.2.7 Imbalance detection
6.3 Operation menu
6.3.1 Activation of the operating menu (Part 1)
6.3.1.1 Keyboard test
6.3.1.2 Checkup of the imbalance sensor
6.3.1.3 Activation / Deactivation of the imbalance sensor
6.3.2 Activation of the operating menu (Part 2)
6.3.2.1 Adjustment of the centrifuge type
6.3.2.2 Adjustment of the operation mode
6.3.2.3 Checkup of the intermediate circuit voltage
6.4 Mounting support
6.4.1 Replacing the front housing; the incremental shaft encoder and the display
6.4.2 Removing the housing
6.4.3 Removing the lid and the hinges
6.4.4 Replacing the rotor chamber or lid gasket
6.4.5 Replacing the motor
6.4.6 Replacing the imbalance / speed sensor
6.4.7 Replacing the carbon brushes
6.4.8 Replacing the power / control board
6.4.9 Replacing the lid lock
7 TROUBLE SHOOTING
7.1 Error messages: Cause / Solution
7.2 Survey of possible error messages and their solutions
7.2.1 Lid release during power failure
7.2.2 Description of the error message system
7.2.3 Error messages
CONTENT
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SERVICE INSTRUCTION Z 206 A
© HERMLE Labortechnik GmbH
8 MAINTENANCE
8.1 Service and maintenance
8.1.1 Maintenance and cleaning
8.1.2 Glass breakage
8.1.3 Disinfection
9 CIRCUIT DIAGRAMS
9.1 Flow diagrams 120 / 230 V / 50-60 Hz
9.2 Control board diagram
10 SPARE PART LIST
Technical modification rights reserved.
© HERMLE Labortechnik GmbH 2007 / 01
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SERVICE INSTRUCTION Z 206 A
© HERMLE Labortechnik GmbH
Rotor-Number
Level 0
Level 1
Level 2
Level 3
Level 4
Level 5
Level 6
Level 7
Level 8
Level 9
221.54 V01
95
71
57
51
44
41
41
41
34
33
221.55 V01
91
72
57
55
44
41
41
39
34
33
220.95 V06
52
36
24
21
20
16
15
14
12
11
220.68 V04
31
20
16
14
12
11 9 9 8 8
Rotor-Number
Level 0
Level 1
Level 2
Level 3
Level 4
Level 5
Level 6
Level 7
Level 8
Level 9
221.54 V01
257
198
191
183
165
149
125
99
70
51
221.55 V01
247
204
191
184
170
155
131
105
74
52
220.95 V06
24
21
20
19
18
17
15
13
11
10
220.68 V04
20
17
17
17
16
16
14
12
10
7
Rotor-Number
Shut off speed
in rpm
Allowed imbalance
in gramme
Shut off imbalance
in gramme
221.54 V01 8 10
221.55 V01 8 10
220.95 V06 4 6
220.68 V04 4 6
5.1 Acceleration times Z 206 A (120 V / 230 V) in seconds
5.2 Deceleration times Z 206 A (120 V / 230 V) in seconds
5 TECHNICAL DATA
5.3 Imbalance shut off data Z 206 A (120 V / 230 V)
There might occur low fluctuations from unit to unit regarding the acceleration and deceleration times and
are therefore guide values only.
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SERVICE INSTRUCTION Z 206 A
© HERMLE Labortechnik GmbH
6.1 General technical description
Model Z 206 A is a micro processor controlled laboratory centrifuge.
The actuation is a DC-motor which is micro processor controlled by the power board.
Model Z 206A has an independent error detection program, displaying possible errors and therefore
supporting the trouble shooting process.
The unit is equipped with several safety features:
• Imbalance detection
• Lid lock does not open until the standstill of the centrifuge
• Rotor over speed protection
Please follow below mentioned safety instructions for any kind of service actions:
• Do not leave units unsupervised, when parts of the housing have been removed and the unit is still
connected to the main power supply.
• Do not bypass the lid’s safety contacts and never work with the unit’s lid open.
• The VDE regulations are valid for all electrical work that has to be done.
6.2 Electrical and electronical components
6.2.1 Power / Control board
The power board is serving the low voltage supply of the centrifuge control system, which is integrated in
the board.
The power board is electrically isolated and has an dielectric strength of DC 2,2kV.
The board can only be exchanged complete.
If there is a defect you have to exchange the complete power board.
All signal lines lead to the control board.
The PCB controls the entire centrifuge.
6.2.2 Transformator
The transformator is serving the low voltage supply of the centrifuge control system, which is integrated
in the power board.
6 SERVICE INSTRUCTIONS
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SERVICE INSTRUCTION Z 206 A
© HERMLE Labortechnik GmbH
6 SERVICE INSTRUCTIONS
Upper Front Housing
LCD-Display
Incremental Shaft Encoder
Keyboard Foil
6.2.3 Control panel
The control panel consists of one LCD-display, one incremental shaft encoder, the upper front housing
and the foil keyboard. These parts can be exchanged separate. The incremental shaft encoder regulates
all parameters which are adjustable by pressing a key and which are indicated in the LCD-display. In the
speed display of the control panel the error message is indicated if there should occur any trouble.
6.2.4 Rotor recognition and over speed protection
The centrifuge will recognize the inputted rotor through the set up in the control panel. As soon as the lid
get closed the rotor number will be indicated in the speed display.
If the pre-selected rpm is higher than the permitted rpm of the rotor, the rpm pre-selection indication will
flash when starting the centrifuge.
Butt he regulation will accelerate the rotor only to its permitted rpm.
6.2.5 Speed signal
The actual speed is extracted by a hall-effect-sensor placed on the lower side of the motor.
The actual-signal is regulated on the control board.
6.2.6 Lid contact
The micro switch in the mechanism of the lid lock controls the correct closing of the centrifuge lid.
The switch may never be bypassed.
The lid lock is unlatched by an electro motor at the end of each run and receives its signal from the
control board.
6.2.7 Imbalance detection
The imbalance detection is effected by a movement sensor, which is placed on the lower side of the
motor and is controlling the oscillating motion of the motor. The unit stopps when the oscillating motions
are too strong. Therefore you have to follow the adjustment instructions stated by the manufacturer.
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SERVICE INSTRUCTION Z 206 A
© HERMLE Labortechnik GmbH
6.3 Operation menu
6.3.1 Activation of the operation menu (Part 1)
The operation menu helps the service personnel to locate defects. It is divided in two parts, which are
graded in several areas again from chapter 6.3.1.1 to 6.3.2.3.
Part 1 is accessible fort he user and different points can be read respectively settled.
Part 2 is for internal use respectively for trained service personnel outdoors Hermle Labortechnik only.
The control board can be adjusted to different units. Here the different parameters are determined on the
respective unit after an exchange of the control board.
The menu can be started as follows:
• Open lid of centrifuge and switch off main switch.
• Press the keys "time" and “lid“ hold them and at the same time switch on the unit.
• After the indication display flash on, let go of the keys "time" and “lid“.
Now it follows a display test for about 5 seconds as shown here under.
6 SERVICE INSTRUCTIONS
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SERVICE INSTRUCTION Z 206 A
© HERMLE Labortechnik GmbH
6 SERVICE INSTRUCTIONS
6.3.1.1 Keyboard test
The keyboard test is used for checking the correct function of the foil keyboard.
• Activate the operation menu part 1 as described in chapter 6.3.1.
• By pressing the key “accel/decel“ the several sub-menus are activated.
• Turn the potentiometer until the special digit "P" appears in the service display.
In the display “rpm“ appears the word “PrESS“.
• By pressing each key the indication changes now from small to big letters.
The key “accel/ decel“ excepted.
to
In case one of these keys does not change the indication display, or the keyboard
test can not be started or exited, you will have to replace the entire control panel.
6.3.1.2 Checkup of the imbalance sensor
• Activate the operation menu part 1 as described in chapter 6.3.1.
• By pressing the key “accel/decel“ the several sub-menus are activated.
• Turn the potentiometer until the special digit "F" appears in the service display.
In the display “rpm“ appears a between 110 and 120.
6.3.1.3 Activation / deactivation of the imbalance sensor
• Activate the operation menu as described in chapter 6.3.1.
• By pressing the key “accel/decel“ the several sub-menus are activated.
• Turn the potentiometer until the special digit "u" appears in the service display.
In the display “rpm“ appears the word „unbAL“.
• By pressing the key “accel/decel“ the menu is activated. Turn the potentiometer until the
words „on“ or „off“ are indicated in the display.
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