Hettich EBA-20S Centrifuge - Frank`s Hospital Workshop
Contents
1. 3 4 Speed sensor B3 e The speed sensor speedometer is located at the bottom of the motor e The speed signal 2 pulses per revolution will be triggered by two magnets fixed at the motor axle e The speed of the rotor is monitored and controlled by the power board 3 5 Brake resistor R1 and Overtemperature fuse F3 e The braking copper which is integrated on the power board transfers the electrical energy produced during braking from a voltage of 380 V with the 230 V version and 203 V with the 120 V version to the brake resistor in a controlled manner e An overtemperature fuse protects the brake resistor against overheating When the overtemperature fuse F3 blows the power board will be separated from the power supply 3 6 Lid lock Y1 e Opening of the lid lock is prevented by a latch The lid lock can only be opened when the relay REL 602 on the power board is energised This occurs when the rotor is at standstill mains power is applied and the key amp is pressed The solenoid is ener gized for three seconds and releases the latch e The centrifuge can only be started when the lid is closed A microswitch on the lid lock detects the position of the lid lock open closed and report it to the power board 3 7 Imbalance switch S 2 e A switch detects any imbalance e Imbalance can only be detected in running mode starting centrifuging and braking e f any imbalance is detected the drive is changed over to braking2. 94 Overtemperaturefuse F3 S405 wu 95 Mais sach o a 97 Applianceplug 97 imbalance switch si S508 m m os 3 Before assembling or disassembling components the following working processes must first be carried out to reach the components Make a note of the plug numbers The components are assembled in reverse order e Open the lid e Switch off the mains switch e Disconnect the centrifuge from the mains e Remove the rotor e Remove the fastening screws of the upper part of the centrifuge housing and place the upper part carefully beside the centrifuge 23 34 Jdisturn ZENTRIFUGEN 9 1 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 e Unplug S401 and S502 on the power board e Use a socket spanner to loosen and remove the three fastening nuts on lower end plate of motor e Lift motor upwards out of centrifuge and unplug the ground wire e Unscrew the speed sensor B3 at the bottom of the motor e Before the motor is installed the three rubber metal bearings must be checked for possible wear or cracks These items must be replaced if necessary e Exchange the motor e Care must be taken of the anti twist device when the rubber metal or motor being installed 9 2 Power board A1 Wait at least 2 min
3. e g 5 28 START RPM x 100 t wy aly ee If the machine version and brake step are not displayed press the A key under the speed indicator until they are displayed 4 To exit the machine version display press the key STOP or perform a MAINS RESET 19 34 Jdisturn ZENTRIFUGEN 3 Enquiry the programme versions Switch off the mains switch Keep the key 4 beneath the speed indicator and the key amp pressed simultaneously Switch on the mains switch and release the keys again Press the key 4 beneath the speed indicator so often until the programme version of the control panel e g b1 12 is displayed ROM o 5 Press the key 4 beneath the speed indicator again The programme version of the power board e g F1 03 is displayed 6 To exit the machine version display press the key STOP or perform a MAINS RESET 6 4 Brake adjustment 1 Switch off the mains switch 2 Keep the key A beneath the speed indicator and the key amp pressed simultaneously 3 Switch on the mains switch and release the keys again The speed indicator shows the machine version and the time indicator shows the set brake step e g Ml Si 5 2 RPM x 100 t n a via via ial gavia gt If the machine version and brake step are not displayed press the 4 key under the speed indicator until they
4. 8 34 Jdieturn ZENTRIFUGEN 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 Look for the displayed error code in the chapter Error messages Remedy the error according to the instructions Carry out a functional check after every repair and whenever a component is replaced see chapter Functional check after a repair 9 34 Jdisturn ZENTRIFUGEN 5 Error messages The error message will be indicated in the speed display of the front panel e g ski 2 START RPM x 100 A Y A Y STOP 5 1 MAINS RESET e Switch off the mains switch e Wait at least for 10 seconds and then switch on the mains switch again 5 2 Brief description Display Fault Brief description Page 1 Tacho error Tacho pulses break down during the run 11 2 System reset Mains interrupt 11 3 Imbalance Imbalance on the motor axis 11 4 Communication Communication error 12 5 Overload Fault in the motor or the motor control 12 6 Overvoltage Mains is out of the tolerance 13 7 Overspeed Overspeed detected 13 8 Undervoltage Mains is out of the tolerance 13 9 Overtemperature Overtemperature switch in the motor release 14
5. EU E 12 o METTE 12 e Ee od i a ale A ea a an ea sik Raa ee ata 13 EDT OU GISD CGC D EE 13 B Ae Ee ie EE 13 9 OvertemperatUre cursando 14 c GOopttOller Watchdog ask 14 ALN Beie 15 Re ee 15 eI ROlOr COURS ooo 15 Appliance e EE 25 PRS SENTING ee ee e E peer nwo e e bere eben 23 e 20 tee 8 25 29 Cable CODI cinco 26 O 27 leie Neie EE 7 24 Controller Watchdog es iie C Doe Ce OE m ba em ee 14 Description and elimination of errors ooooccccnnnnnccccconnnncnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnannnes 11 Disassembling ec 23 nl Ile 18 Error Messages EE 10 Flat ribbon AN iii icc lol le TE 25 ege EUREN 22 sier El Te 12 balance SWITOD EE 8 25 30 Imbalance SWITGPSOI E 21 Intermediate voltage sce cares ia E A C E atic 30 MOCK em rr POPE TEE 8 Lid lock GOD EE EE 21 kid lock solenoid sit ERP EE OP IEEE deco ede edo euo edo eudd edo eodd edo cuc bdo od bdo cuo bdo cito ebd coca 29 EMO Eeer oio emite epe ti ede eh tete ape pcr pete pacte pde ted tete Eee dps 25 Bop epe PEE EM 29 33 34 Jdisturn ZENTRIFUGEN WAE NING VET SIO Mi EE 18 Mache V CISION EIOS ce ci ex okt EE 16 A OA 22 Mais SWIG EE a 25 leren lara iaa 8 24 28 WIOLOl CON iaa Ce uf 28 No display sa 17 No speed Mille 16 OVvertem peral USO naini cal i a aie al Sa a aaa 8 25 Overtemperature WILD Naira Aad a ta yates 28 PIMA SSIGMINIG EEN 27 POWER DO EE 7 24 30 SOLIS cur talkin LA sta Ee 18 SSO AIG sete
6. Perform a MAINS RESET after standstill 7 Overspeed Error Error consequence Error cause Measurement Overspeed The speed measured by the speed sensor B3 is 250 RPM higher than the maximum speed of the rotor Drive switches off No brake effective e Speed sensor B3 defective e Power board A1 defective Check the speed sensor see section 10 2 1 Error code reset Perform a MAINS RESET after standstill 8 Undervoltage Error Error consequence Error cause Measurement Mains voltage less than 2096 as nominal voltage Drive switches off No brake effective Mains voltage too less e Power board A1 defective Check the mains voltage Measure intermediate voltage see chapter 0 Error code reset Perform a MAINS RESET after standstill 13 34 Jdisturn ZENTRIFUGEN 9 Overtemperature Error Error consequence Error cause Measurement Overtemperature in the motor indicated Drive switches off No brake effective e Motor defective e Power board A1 defective e Overtemperature switch in motor defective e Loosen contact in plug S401 Pin 4 or 5 Remove plug S405 and measure between Pin 4 and 5 Switch open amp OO OR Switch closed oo Q defective See also section 10 2 Error code reset Perform a MAINS RESET after standstill c Controller Watchdog Error Error consequence Error cause Watchdog in power board Discrepancy in program procedure Drive
7. Versions Error No indication in the speed display 16 Wrong machine version setting c Controller Watchdog Fault in power board 14 d Lid lock error Fault in lid lock system 15 E Short circuit Short circuit in power board 15 F No Rotor code Wrong machine version 15 10 34 Jdieturn ZENTRIFUGEN 5 3 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 Error cause e Speed sensor tacho defective e Power board A1 defective e Loosen contact in plug S502 Measurement 1 A1 S502 pin 2 GND to pin 3 Ug 2 Speed sensor plug S502 pin 4 pin 2 GND 2 pulses per revolution See also section 10 2 Error code reset Wait for a time duration of 120 sec and after this perform a MAINS RESET 2 System reset Error Mains interrupt during a run Error Drive switch off and brakes with the adjusted brake level consequence Error cause e Power supply has failed e Loosen contact in electrical connections Error code reset 1 Wait for rotor standstill 2 Open the lid and press key START or perform a MAINS RESET 11 34 Meth ZENTRIFUGEN 3 Imbalance Error Error consequence Error cause Measurement Error code reset Imbalance on motor axle Drive switch off and brakes with the adjusted brake level e Weight difference in rotor components e Imbalance switch is
8. ces cores as cee Ee EE EE EE EE 28 SDeed SEN ee ENEE EE 8 11 24 Test res UNS soils totis b duci cia tox S vena ait rnit ber e S Dreher E babe 28 The lid can not be opene 17 34 34
9. defective or not connected e Imbalance switch disadjusted Adjustment see chapter Imbalance switch off e Loose contact in cable or plug S503 e Power board A1 is defective Plug of imbalance switch S503 Pin 1 to Pin 4 Switch is a opener See also chapter 10 2 5 Open the lid after standstill 4 Communication Error Error consequence Error cause Error code reset 5 Overload Error Error consequence Error cause Measurement Error code reset 12 34 Communication error between control board and power board Drive switch off No brake effective e Loose contact in flat ribbon cable e Control board A3 defective e Power board A1 defective MAINS RESET after standstill If the MAINS RESET performed before standstill the target speed will be indicated in the display until standstill Power board detects overload Drive switches off No brake effective e Power board A1 defective e Motor defective to low impedance or motor bearings are defective Motor coil see section 10 2 2 Perform a MAINS RESET after standstill Jdieturn ZENTRIFUGEN 6 Overvoltage Error Error consequence Error cause Measurement Overvoltage in intermediate circuit This error normally only occur when the drive is being braked Drive switches off No brake effective e Power board A1 defective e Brake resistor defective Measure intermediate voltage see section 0 Error code reset
10. explosion endangered areas EMC Emitted interference suppression of EN 55011 FCC Class B radio interference Group 1 Class B EN 61000 3 2 EN 61000 3 3 Interference immunity EN 61000 6 1 Noise level dependent on rotor lt 55 dB A Dimensions Width Depth Height approx 6 3 kg 31 34 Meth ZENTRIFUGEN 12 32 34 Skeleton construction of EBA 20S Y Let Jas ai ie er XN Pall SN Ki 3x w N i co wm a 11 12 13 14 15 16 17 18 19 20 21 Lid complete Rotor Covering foil for control panel Control panel Lid lock Motor Power board Anti twist device Rubber metal bearing Speed sensor Housing lower part Rubber foot Appliance plug Brake resistor Overtemperature fuse Housing upper part Friction rubber Lock washer Flat spring Hinge bolt Jdieturn ZENTRIFUGEN 13 Index SH NK O A oce Lo LOEO ED LOCALS EDO LED LOEO LO CEPS TED LS cubus 11 Sr UR EE 11 MDAC EN 12 4 Communication E TEE
11. run up the drive has to switch off before reaching 1500 RPM The imbalance switch off is adjusted by changing the distance of the imbalance switch With a test run with the indicated differences in weight the imbalance switch off will be checked Adjusting the imbalance switch e Loosen both screws at the angle bracket of the imbalance switch on the outer part of the housing floor until you can shift it e Setthe permissible imbalance by shifting the angle bracket e Tighten both screws at the angle bracket of the imbalance switch again e Check the imbalance switch off with a test run 21 34 Meth ZENTRIFUGEN 7 Change mains input fuse N Switch off the mains switch and separate the centrifuge from the mains The fuse holder A with the mains input fuses is located next to O the mains switch e Remove the connecting cable from the machine plug socket e Press the snap fit B against the fuse holder A and A B remove e Exchange defective mains input fuses Only use fuses with the rating defined for the type See the following table e Reinsert the fuse holder until the snap fit clicks shut e 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 E914 8 Functional check after a repair After a repair a functional check of the unit must be carried out For functional check a test run with the lo
12. switches off No brake effective e Power board A1 defective Error code reset Perform a MAINS RESET after standstill 14 34 Jdieturn ZENTRIFUGEN d Lid lock error Error Lid lock is open during centrifugation Error Drive switches off No brake effective consequence Error cause e Micro switch is defective e Power board A1 defective e Loosen contact in Plug S404 Pin 5 and 6 e Mechanical defect at the lid lock e Emergency release active during run Measurement Remove plug S404 and measure between Pin 5 and 6 Lid closed 00 Lid open Q See also section 10 2 Error code reset Perform a MAINS RESET after standstill E Short circuit Error Power board detects short circuit Current consumption too high Error Drive switches off No brake effective consequence Error cause e Power board A1 defective Error code reset Perform a MAINS RESET after standstill F Rotor code Error Wrong machine version is set Error Drive switches off after 15 sec No brake effective consequence Error cause e Wrong machine version is set Error code reset Set the correct machine version see chapter 6 1 15 34 Jdisturn ZENTRIFUGEN 5 4 Defects without Error indications No speed indication Machine Version Error Error After switching on the centrifuge the speed indicator extinguish and in the time indicator appears the set machine version Error cause e Wrong machine version adjusted Example
13. 2 Q Overtemperature fuse F3 al 8 LH Remove plug S405 and measure between pin 3 and 4 Fuse OK 200 Fuse defective oo Q zi Bt F3 L 10 2 4 Lid lock Y1 Lid switch 5404 Remove plug S404 and measure between VIA OI pin 5 and 6 wa WH BK OK Switch pressed 00 Q Q Switch inoperative o Q Lid lock solenoid K1 Remove plug S404 and measure between pin 1 and 3 230 V Version 5 7 KO 29 34 Jdisturn ZENTRIFUGEN 10 2 5 Imbalance switch Remove plug S503 and measure between pin 1 and pin 4 Switch pressed oQ Switch inoperative 0 Q 1 10 2 6 Intermediate voltage on power board A1 The intermediate voltage has Y to be measured during the run run up run and run down SE i S402N 230 V version t3 0 000nD 380 V DC ER MES 120 V version 203 V DC Mo S4021 E 30 34 Jdieturn ZENTRIFUGEN 11 Technical specification Manulaeturr Andreas Hettich GmbH amp Co KG D 78532 Tuttlingen Model EBA 208 Ambient conditions EN 61010 1 Set up site Indoors only Altitude Up to 2000 m above sea level Ambient temperature 2 C to 40 C Humidity Maximum relative humidity 80 for temperatures up to 31 C linearly decreasing to 50 relative humidity at 40 C Excess voltage category IEC 60364 4 443 Pollution degree Device protection class Not suitable for use in
14. aded rotor must be performed During the test run the followings must be checked e Function of the keys the display and the LEDs e Run up and slow down time max speed of the rotor Values see operating instructions chapter Anhang Appendix Rotoren und Zubeh r Rotors and accessories e Sample temperature Values see operating instructions chapter Anhang Appendix Rotoren und Zubeh r Rotors and accessories e Distance of the imbalance switch e Current consumption Values see chapter Technical specification After the test run a safety test must be carried out Check the following values e Insulation resistance gt 2 MO e Protective conductor resistance lt 0 2 Q e Leakage current lt 3 5 mA limit according to EN 61010 1 A laboratory centrifuge do not belong to those medical appliances which may be tested according to the regulation IEC 60601 1 or corresponding national medical electronic standards Laboratory centrifuges are classified as laboratory equipment The regulations applying to laboratory equipment are IEC 61010 1 or European standard EN 61010 1 22 34 Jdieturn ZENTRIFUGEN 9 Assembling and disassembling components Component Abreversion Plug Connected to Description in section Rubber metal bearing 91 Power boaa E ART eene do ge REI 2 Controlpanel a 93 Flatribboncable awas 96 Lidlck n S44 M 99 Brakeresistor BE f sos A
15. ance switch ff cM er ses D S502 es E Leistungsteil S501 Power board Jumper f r VerschluBansteuerung Jumper for lid lock control 502 401 405 503 404 MEM YYYY YYYY YYYY EEN 1234 12345 234 1234 65432 EE le S Tp oU qur T dl Doi EX d d Dp Lud Wi i nir x g ke F2 Td d d e ipa ce mE E ee zs ER sl LNE B3 M1 R1 F3 L1 S2 Y1 Q1 o oo olo oo ole oo o BA Typ type F1 F2 2080 T3 15 AH 250V O 0 c 9 9 9 0 10 9 0 0 m bz 2080 01 T 5 AH 250V m i OO 00 09 O O O O A3 Steuerte control board HH SE 5 L 27 34 Jdisturn ZENTRIFUGEN 10 2 Signals and test results 10 2 1 Speed sensor B3 Tacho Power supply Ue Plug S502 measure between Pin 2 GND TI and Pin 3 E saz m f ON OV QN nz LN ale Tacho signal HL Plug S502 measure between Pin 2 GND and Pin 4 B3 10 2 2 Motor Motor coil Remove plug S401 and measure between two lines 7 230 V version amp 8 4 0 0 4 120 V version z2 1Q a tr p Overtemperature switch TO E aoe zz Remove plug S401 and measure between pin 4 and 5 4 y Switch closed 00 f Switch released oQ 28 34 Jdieturn ZENTRIFUGEN 10 2 3 Brake resistor R1 and overtemperature fuse F3 Brake resistor R1 S405 Remove plug S405 and measure between Dee pin 1 and 2 JTT 230 V Version 330 Q Q Q 120 V Version z 8
16. are displayed 4 Set the desired brake step with the keys A Y beneath the time indicator Step 1 short run down time Step 0 long run down time For run down times see chapter Anhang Appendix Rotor und Zubeh r Rotor and accessories in the operating instructions 5 Press the key to save the setting s Es 20 34 Jdieturn ZENTRIFUGEN 6 5 Lid lock control The lid can be opened when the rotor is at standstill and the key a 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 sage H G Motor Ubertemp schalter EH S402N N Ke Overtemp switch s402P E E ET 2 GOOD Aa eer aL UR US UT S401 l Bremswiderstand Ubertemp sicherung Brake resistor Overtemp fuse S404 T 2 3 4 CYOOCU p oo S AAA V Deckelverriegelung l S405 Unwuchtschalter Lid lock i n c Imbalance switch REM AT ete LL ss O S502 1234 J Leistungsteil S501 Power board Jumper f r VerschluBansteuerung Jumper for lid lock control 6 6 Imbalance switch off The permissible imbalance is specified for rotor E1624 by the indication of the difference in weight of opposite rotor positions When having a difference in weight within the range of 7g to 15g during
17. check after arepnair menn 22 9 Assembling and disassembling components 23 9 1 Motor M1 speed sensor B3 Rubber metal bearing 24 9 2 CPOWer board A To a PERPE ae te EVEN ist 24 93 CONTO DANG AS occ tds secs e 24 9 4 Brake teSistO s 25 95 Overtemperature fuse Fossil aes eet ee eet bea Stet ek tice 25 9 67 PIarTIDDOD Cabloo s ebat ea 25 9 7 Appliance plug with mains SWIECD iioi dee t epar t xe a reta d cue 25 9 8 Imbalance switch EE 25 Se Ree EE 25 3 34 Jdisturn ZENTRIFUGEN 10 KEIER 26 10 1 Circuit diagram and plug assonment 27 10 2 Signals and test Feel eege 28 10 2 1 Speed sensor B3 1 achaca 28 10 2 2 MOIOD uscar licita 28 10 2 3 Brake resistor R1 and overtemperature fuse E 29 1024 DE Re Biet EE 29 10 2 5 Imbalafico S EE 30 10 2 6 Intermediate voltage on power board AT 30 11 Rene Eer lie aee ec D 31 12 Skeleton construction of EBA 206 32 13 ie ee HN 33 4 34 Jdieturn ZENTRIFUGEN Introduction e Repairs must only be carried out by personnel authorised to do so by the manufacturer Interventions and modifications at centrifuges which have been conducted by persons not authorized by the Andreas Hettich GmbH amp Co KG company are at their own risk and entail the loss off all guarantee and liability claims In such an event any guarantee claim or liability claim against the Andreas Hettich GmbH amp Co KG company expire e Only original spare pa
18. d centrifuge which is comprised of the following electrical components e Control panel Power board Motor Speed sensor Tacho Brake resistor with overtemperature fuse Lid lock system Imbalance switch A All electronic components are on mains due to the DC coupling Steuerteil LED Control panel LED US Schnittstelle Interface EEPROM Netz Mains Leistungsteil Power board VerschluB Lid lock Deckelschalter Lid switch mit Mikroprozessorsteuerung Uwuchtschalter und Frequenzumrichterteil Imbalance switch With Micoprocessor control and frequency control Bremswiderstand Brake resistor Drehzahlsensor Tacho Speed sensor tacho Pai 6 34 Jdieturn ZENTRIFUGEN 3 1 Control panel A3 The control panel have only restricted control tasks it disposes of the following characteristics e Input panel for operation parameters Indication elements Transmission of the signals to the power board via the interface Storing of centrifuge version Storing the machine version and the brake setting By means of the machine version the power board is informed which kind of centrifuge has to be controlled Then the power board takes the corresponding values from the ROM e g Max Speed Acceleration and deceleration ramps e Communication with the power board via TTL interface The power supply for the control panel is tra
19. deta ZENTRIFUGEN EBA 20S Repair instructions 03 08 Andreas Hettich GmbH amp Co KG AR2080EN Meth ZENTRIFUGEN Andreas Hettich GmbH amp Co KG FohrenstraBe 12 D 78532 Tuttlingen Germany Phone 07461 705 0 Fax 07461 705 125 info hettichlab com service hettichlab com www hettichlab com 2007 by Andreas Hettich GmbH amp Co KG All rights reserved No part of this publication may be reproduced without the prior written permission of the copyright owner Anderungen vorbehalten AR2080EN 03 08 2 34 deta ZENTRIFUGEN Contents 4 nto ana a is ds 5 2 Symbol MEANINGS is SA A A eo ae AS 5 3 Description EEGEN 6 Sech GOMAS AS a AN 7 3 2 Power board A1 so ode e uite uu Mm Rd 7 3 9 Motor MI tege 8 34 Speed sensor BOs istic due iut queo ate RE 8 3 5 Brake resistor R1 and Overtemperature Iuset 8 3 6 JON EE 8 3 7 Imbalance switch 72 8 4 Troubleshooting procedures en 9 5 RENO MOSSOS ii A LRL A A A A 10 5d MAINS RESET WEE 10 9 2 Biel descetploli iie e Rr AMI Ma eMe de tran 10 5 3 Description and elimination of errors AEN 11 5 4 Defects without Error indications ouvir aa et eroi e oae teen Eres 16 6 Settingsand ENQUINOS C S 18 6 1 Setting the machine VOS ION 5 dicic ind de ed 18 6 2 Enquiry the machine version EE 19 6 3 Enquiry the programme versions vsisirisiclio tii 20 6 4 Brak adjustment EE 20 00 LOCK COMTO EE 21 6 6 Imbalance SWilCh olf usi A dida 21 7 ED 22 8 Functional
20. e emergency release No power supply on control board no display No operation possible e No mains supply e Power board A1 defective e Control panel A3 defective e Flat ribbon cable to control panel A3 defective Overtemperature fuse F3 defective Mains supply power board A1 S402L to S402N Power board A1 S501 Pin 1 GND to S501 Pin 4 5V Control panel A3 S502 Pin 1 GND to S502 Pin 4 5V Overtemperature fuse F3 Remove plug S405 and measure directly at both flat connections of the overtemperature fuse Fuse OK z0 0 Fuse defective o Q See also section 10 2 3 AA O N 17 34 Jdisturn ZENTRIFUGEN 6 Settings and enquiries ull RPM x 100 Bu 6 1 Setting the machine version The machine version stored in the control panel must correspond to the centrifuge model 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 F will be displayed see chapter Error messages The machine version 3 EBA 20S must be set as follows A All electronic components are on mains due to the DC coupling 1 Switch off the mains switch and disconn
21. e upper and the lower fastening clip and remove the appliance plug out of the housing e Remove the plugs and the earth connection from the appliance plug Remove the fuse holder see chapter 7 Exchange the appliance plug 9 8 Imbalance switch S2 e Unplug S503 from the power board e Remove the to fastening screws e Remove the cables at the imbalance switch e Exchange the complete imbalance switch e After mounting the imbalance switch adjust it as described in chapter Imbalance switch off 9 9 Lid lock Y1 Remove the two fastening screws on the top of the upper housing Unplug the cable from the switch and the solenoid Remove the earth connection from the lid lock Exchange the lid lock 25 34 Meth ZENTRIFUGEN 10 Circuit diagrams Used cable colours and their abbreviations Abbreviation E gre red white yellow 26 34 deta ZENTRIFUGEN 10 1 Circuit diagram and plug assignment SE gt E Motor bertemp schalter eg Overtemp switch S402P SZ A ees E CUR US UT S401 A 1 Bremswiderstand bertemp sicherung Brake resistor Overtemp fuse NOON l Deckel S405 Unwuchtschalter oe n C Imbal
22. ect the centrifuge from the mains supply 2 Remove the rotor 3 Remove the fastening screws of the upper part of the centrifuge housing and place the upper part carefully beside the centrifuge 4 Short the two throughplatings on the rear side of the control panel with the short circuit plug E1754 Short circuit plug E1754 7 Lo 3 Short the two through C ES S S m platings with the short circuit plug or a suitable tool 18 34 Vet ZENTRIFUGEN 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 5 ZR START nie Ac RPM x 100 8 Adjust the machine version 3 by using the 4 and Y keys beneath the time indicator 9 Press the key STOP in order to store the set machine version 10 Switch off the mains switch position 0 11 Disconnect the centrifuge from mains and remove the short circuit plug 12 Put on the upper part of the centrifuge housing and fix it 13 Switch on the mains switch position I 6 2 Enquiry the machine version 1 Switch off the mains switch 2 Keep the key 4 beneath the speed indicator and the key 2 pressed simultaneously 3 Switch on the mains switch and release the keys again The speed indicator shows the machine version and the time indicator shows the set brake step
23. for indication L L 4 START J RPM x 100 ZS oa AE Proceed as the following 1 Set the machine version 3 EBA 20S by using the 4 and Y keys beneath the time indicator 2 Press the key STOP in order to store the set machine version 3 Perform a MAINS RESET The lid can not be opened Error The lid can not be opened The rotation display indicates Lid opened but the lid is closed Error cause e Micro switch at lid lock is defective e Loosen contact on plug S404 Pin 5 and 6 e Power board A1 defective e Jumper for lid lock control is not set on power board A1 see chapter 0 Measurement Remove plug S404 and measure between Pin 5 and 6 Switch closed 0 0 Switch opened Q See section 10 2 4 Opening the lid Release the lid by using the emergency release 16 34 Jdieturn ZENTRIFUGEN The lid can not be opened Error Error cause Measurement Opening the lid No display Error Error consequence Error cause Measurement The lid can not be opened The rotation display indicates Lid closed and the lid is closed e Solenoid on lid lock is defective e Loosen contact on plug S404 Pin 1 and 3 e Power board A1 defective e Jumper for lid lock control is set on power board A1 see chapter 0 Remove plug S404 and measure between Pin 1 and 3 Solenoid ok z 5 7 KQ Solenoid defective oo Q See also section 10 2 4 Release the lid by using th
24. nsmitted via the flat ribbon cable Pin 1 GND Pin 4 5V 3 2 Power board A1 The power board is an combination of e Control panel e Voltage supply e Frequency converter The power board carries out the following tasks e Power supply 15 V DC for imbalance switch e Power supply 5 V DC for control panel e Generating the motor power supply three phase current with variable frequency and voltage Functional description The mains supply is rectified smoothened and chopped into a pulse width pattern in three bridge elements with a microprocessor Slot for motor with integrated overtemperature switch Monitoring the motor current Evaluating the overtemperature switch in the motor Slot for imbalance switch Evaluating the imbalance switch Slot for brake resistor Triggering the brake resistor Slot for speed sensor Evaluating the speed sensor pulses 2 pulses per revolution Slot for lid lock Triggering the lid lock magnet at standstill of the rotor Evaluating the message line lid lock open closed Communication with the control panel via TTL interface Error evaluation 7 34 Jdisturn ZENTRIFUGEN 3 3 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
25. rts and original accessories licensed by the Andreas Hettich GmbH amp Co KG company are allowed to be utilised T If no original spare parts or no original accessories are used any guarantee claim or liability claim against the Andreas Hettich GmbH amp Co KG company ceases to exist e Information about the operation of the centrifuge please see operating instructions e We reserve all rights for these technical documents A AN La 4 e Symbol meanings Symbol on the machine Attention general hazard area Before using the centrifuge implicitly read the operating instructions and pay attention to the safety relevant references Symbol in this document Attention general hazard area This symbol refers to safety relevant warnings and indicates possibly dangerous situations The non adherence to these warnings can lead to material damage and injury to personal Symbol in this document Warning Danger for human lives by electric shock Symbol in this document This symbol refers to important circumstances Symbol on the machine and in this document Symbol for the separate collection of electric and electronic devices according to the guideline 2002 96 EG WEEE The device belongs to Group 8 medical devices Applies in the countries of the European Union as well as in Norway and Switzerland 5 34 Jdisturn ZENTRIFUGEN 3 Description of the centrifuge The EBA 20S is a microprocessor controlle
26. utes after disconnecting the centrifuge from the mains until the intermediate circuit capacitors of the frequency converter are unloaded Unplug all plugs and cables from the power board Remove the two fastening screws of the power board Exchange the power board Before installation it must be noted that there is a heat conducting paste between power board and centrifuge housing floor Heat conduction from power board to centrifuge housing floor must be ensured e The jumper for the lid lock control has to be plugged on the power board see chapter Lid lock control N Heat conduction from power board to centrifuge housing floor must be ensured 9 3 Control panel A3 e Remove the three fastening screws and lift up the control panel carefully e Unplug the flat ribbon cable from the power board e Exchange the control panel 24 34 Jdieturn ZENTRIFUGEN 9 4 Brake resistor R1 e Remove the two fastening screws e Unplug the two cable from the brake resistor e Exchange the brake resistor 9 5 Overtemperature fuse F3 e Remove the two cables from the overtemperature fuse e Unscrew the fastening screws e Exchange the overtemperature fuse 9 6 Flat ribbon cable e Unplug the flat ribbon cable from the power board e Disassemble the control board see section 9 3 e Unplug the flat ribbon cable from the control board e Assemble in reverse order 9 7 Appliance plug with mains switch e Press th
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