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Summary of Contents for Hettich EBA 20S
- Page 1 EBA 20S Repair instructions 03.08 Andreas Hettich GmbH & Co. KG AR2080EN...
- Page 2 (07461) 705-0 (07461) 705-125 info@hettichlab.com, service@hettichlab.com www.hettichlab.com © 2007 by Andreas Hettich GmbH & Co. KG All rights reserved. No part of this publication may be reproduced without the prior written permission of the copyright owner. Änderungen vorbehalten! AR2080EN / 03.08...
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Page 3: Table Of Contents
Contents Introduction ......................5 Symbol meanings..................... 5 Description of the centrifuge..................6 Control panel A3 ....................7 Power board A1 ....................7 Motor M1......................8 Speed sensor B3....................8 Brake resistor R1 and Overtemperature fuse F3..........8 Lid lock Y1 ......................8 Imbalance switch S 2 .................. - Page 4 Brake resistor R1 and overtemperature fuse F3........29 10.2.4 Lid lock Y1 ....................29 10.2.5 Imbalance switch ..................30 10.2.6 Intermediate voltage on power board A1 ..........30 Technical specification ..................31 Skeleton construction of EBA 20S..............32 Index ........................33 4/34...
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Page 5: Introduction
In such an event any guarantee claim or liability claim against the Andreas Hettich GmbH & Co. KG company expire. • Only original spare parts and original accessories licensed by the Andreas Hettich GmbH & Co. KG company are allowed to be utilised. -
Page 6: Description Of The Centrifuge
Description of the centrifuge The EBA 20S is a microprocessor-controlled centrifuge which is comprised of the following electrical components: • Control panel • Power board • Motor • Speed sensor (Tacho) • Brake resistor with overtemperature fuse • Lid lock system •... -
Page 7: Control Panel A3
Control panel A3 The control panel have only restricted control tasks, it disposes of the following characteristics: • Input panel for operation parameters • Indication elements • Transmission of the signals to the power board via the interface. • Storing of centrifuge version •... -
Page 8: Motor M1
Motor M1 • The motor is a three- phase asynchronous motor with two pairs of poles. • The motor is protected against overheating by an overtemperature switch. • The power board evaluates the overtemperature switch. • The motor is controlled by the power board with a three-phase current with variable frequency and voltage. -
Page 9: Troubleshooting Procedures
Troubleshooting procedures • Fuses in installation in which centrifuge is installed are intact. • Mains input fuses of centrifuge are intact. • Supply voltage present at (see circuit diagram): − Connecting cable − Appliance plug − Mains switch − Power board A1, plug S402L and S402N •... -
Page 10: Error Messages
Error messages The error message will be indicated in the speed display of the front panel e.g. : START RPM x 100 STOP MAINS RESET • Switch off the mains switch. • Wait at least for 10 seconds and then switch on the mains switch again. Brief description Display. -
Page 11: Description And Elimination Of Errors
Description and elimination of errors – 1 – Tacho error Error Tacho pulses break down during the run. Error Drive switch off and brakes with the adjusted brake level. consequence • Speed sensor (tacho) defective Error cause • Power board (A1) defective •... - Page 12 – 3 – Imbalance Error Imbalance on motor axle Error Drive switch off and brakes with the adjusted brake level consequence • Weight difference in rotor components. Error cause • Imbalance switch is defective or not connected. • Imbalance switch disadjusted (Adjustment see chapter "Imbalance switch-off").
- Page 13 – 6 – Overvoltage Error Overvoltage in intermediate circuit. This error normally only occur when the drive is being braked Error Drive switches off. No brake effective consequence • Power board (A1) defective Error cause • Brake resistor defective Measurement Measure intermediate voltage, see section 0 Error code reset Perform a MAINS RESET after standstill.
- Page 14 – 9 – Overtemperature Error Overtemperature in the motor indicated. Error Drive switches off. No brake effective consequence • Motor defective Error cause • Power board (A1) defective • Overtemperature switch in motor defective • Loosen contact in plug S401 Pin 4 or 5 Measurement Remove plug S405 and measure between Pin 4 and 5 : ≈...
- Page 15 – d – Lid lock error Error Lid lock is open during centrifugation. Error Drive switches off. No brake effective consequence • Micro switch is defective. Error cause • Power board (A1) defective. • Loosen contact in Plug S404 Pin 5 and 6. •...
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Page 16: Defects Without Error Indications
• Wrong machine version adjusted Error cause Example for indication: START RPM x 100 STOP Proceed as the following: 1. Set the machine version 3 (EBA 20S) by using the keys beneath the time indicator. 2. Press the key in order to store STOP the set machine version. - Page 17 The lid can not be opened The lid can not be opened Error The rotation display indicates "Lid closed" and the lid is closed. • Solenoid on lid lock is defective Error cause • Loosen contact on plug S404 / Pin 1 and 3 •...
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Page 18: Settings And Enquiries
Control panels supplied as spare part are set to machine version 4 (ROTOFIX 32). After installing the control panel the machine version 3 (EBA 20S) must be set. If a false machine version is set in the control panel so either after switching on the centrifuge the set machine version will be displayed or after start of the centrifugation run the error message "... -
Page 19: Enquiry The Machine Version
5. Put on carefully the upper centrifuge housing. 6. Connect the centrifuge to the mains and switch the centrifuge on. 7. Switch on the mains switch (position "I"). The set machine version will be displayed, e.g.: START RPM x 100 STOP 8. -
Page 20: Enquiry The Programme Versions
Enquiry the programme versions 1. Switch off the mains switch. 2. Keep the key beneath the speed indicator and the key pressed simultaneously. 3. Switch on the mains switch and release the keys again. 4. Press the key beneath the speed indicator so often until the programme version of the control panel (e.g. -
Page 21: Lid Lock Control
Lid lock control The lid can be opened when the rotor is at standstill and the key is pressed. The solenoid on the lid lock remains energized for three seconds. With this kind of lid lock control, the jumper for the lid lock control on the power board (see below) must be plugged. -
Page 22: Change Mains Input Fuse
See the following table. • Reinsert the fuse holder until the snap-fit clicks shut. • Reconnect the centrifuge to the mains supply. Model Type Fuse Order no. EBA 20S 2080 T 3,15 AH/250V E997 EBA 20S 2080-01 T 5 AH/250V... -
Page 23: Assembling And Disassembling Components
Assembling and disassembling components Component Abreversion Plug Connected to Description in section Motor S401 Rubber-metal bearing Power board Control panel Flat ribbon cable A1 to A3 Lid lock S404 Brake resistor S405 Overtemperature fuse S405 Mains switch Appliance plug Imbalance switch S503 Before assembling or disassembling components, the following working processes must first be carried out to reach the components. -
Page 24: Motor M1 / Speed Sensor B3 / Rubber-Metal Bearing
Motor M1 / speed sensor B3 / Rubber-metal bearing Wait at least 2 minutes after disconnecting the centrifuge from the mains, until the intermediate circuit capacitors of the frequency converter are unloaded. • Unplug S401 and S502 on the power board. •... -
Page 25: Brake Resistor R1
Brake resistor R1 Wait at least 2 minutes after disconnecting the centrifuge from the mains, until the intermediate circuit capacitors of the frequency converter are unloaded. • Remove the two fastening screws. • Unplug the two cable from the brake resistor. •... -
Page 26: Circuit Diagrams
Circuit diagrams Used cable colours and their abbreviations: Abbreviation Colour black brown blue GN/YE green-yellow grey white yellow 26/34... -
Page 27: Circuit Diagram And Plug Assignment
10.1 Circuit diagram and plug assignment S402L S402N Motor Übertemp. -schalter Overtemp. switch S402P UR US UT S401 Bremswiderstand Übertemp.-sicherung S404 Brake resistor Overtemp. fuse Deckel- verriegelung Unwuchtschalter S405 Lid lock Imbalance switch n. c. S503 S502 2 3 4 Leistungsteil S501 Power board... -
Page 28: Signals And Test Results
10.2 Signals and test results 10.2.1 Speed sensor B3 (Tacho) S502 Power supply: Plug S502, measure between Pin 2 (GND) and Pin 3: +8...+15V Tacho signal: Plug S502 measure between Pin 2 (GND) and Pin 4: +8...+15V +8...+15V 2 pulses per revolution 10.2.2 Motor Motor coil... -
Page 29: Brake Resistor R1 And Overtemperature Fuse F3
10.2.3 Brake resistor R1 and overtemperature fuse F3 S405 Brake resistor R1 Remove plug S405 and measure between pin 1 and 2 : Ω Ω ≈ 330 Ω 230 V Version: ≈ 82 Ω 120 V Version: Overtemperature fuse F3 Remove plug S405 and measure between pin 3 and 4 : ≈... -
Page 30: Imbalance Switch
10.2.5 Imbalance switch Remove plug S503 and measure between pin 1 and pin 4: ∞ Ω Switch pressed : Switch inoperative: ≈ 0 Ω 10.2.6 Intermediate voltage on power board A1 The intermediate voltage has to be measured during the run ( run-up, run and run-down). -
Page 31: Technical Specification
Technical specification Andreas Hettich GmbH & Co. KG Manufacturer D-78532 Tuttlingen Model EBA 20S Type 2080 2080-01 Mains voltage (± 10%) 200 - 240 V 1∼ 100 - 127 V 1∼ Mains frequency 50 - 60 Hz 50 - 60 Hz... -
Page 32: Skeleton Construction Of Eba 20S
Skeleton construction of EBA 20S Lid complete Rotor Covering foil for control panel Control panel Lid lock Motor Power board Anti-twist device Rubber-metal bearing 10 Speed sensor 11 Housing lower part 12 Rubber foot 13 Appliance plug 14 Brake resistor... -
Page 33: Index
Index – 1 – Tacho error......................11 – 2 – System reset ......................11 – 3 – Imbalance......................12 – 4 – Communication ....................12 – 5 – Overload....................... 12 – 6 – Overvoltage ......................13 – 7 – Overspeed......................13 –... - Page 34 Machine version......................18 Machine-Version-Error ....................16 Mains input fuses ......................22 Mains switch ......................... 25 Motor........................8, 24, 28 Motor coil ........................28 No display ........................17 No speed indication ...................... 16 Overtemperature fuse ....................8, 25 Overtemperature switch ....................28 Plug assignment......................