Service Instruction for Small Centrifuge Z 206 A
Contents
1. 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 units 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 syste2. Service Instruction for Small Centrifuge Z 206 A SERVICE INSTRUCTION Z 206 A O 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 t
3. Grasp under the lid gasket and lift out the rotor chamber piece for piece Take care that the fixing ends are at the back part of the chamber 1 Start the mounting always with this glued ends When mounting the rotor chamber make sure that the ventilation drilling behind on the right points to the corner of the housing 2 6 4 5 Replacing the motor Page 15 of 25 Remove the housing as described above Remove the connection cable to the motor on the control board a Current supply of the motor b Speed and imbalance sensor p e L T4 A d ei ANE 9 LJ We h L L ef i v e 9 d Turn the motor fixing screws out of the rear side of the ground plate e Lift the motor out of the unit SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 6 SERVICE INSTRUCTIONS When re assembling the spare motor take care of the wirings as they must not be jammed e Re assemble the unit in reverse order 6 4 6 Replacing of the imbalance sensor Remark As this is a electric movement sensor you can not adjust it anymore as in other units Should appear any difficulties with the imbalance please give us an exact description of it as well as the serial number of the unit and the rotor type You can check up the imbalance sensor with the operation menu Look up in chapter 6 3 1 2 Replacing the imbalance and speed sensor Remove the lower covering of the fro
4. shown here under Page 7 of 25 SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH Page 8 of 25 6 3 1 1 6 3 1 2 6 SERVICE INSTRUCTIONS 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 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
5. string Put he string and the plastic stopper back again Switch the centrifuge on again for go on working Page 18 of 25 SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 7 TROUBLE SHOOTING 7 2 2 Description of the error message system The error message is shown in the time display through particular figures 26 At the same time the word Error 26 is indicated in the display accel decel 26 7 2 3 Errors that may be indicated in the LCD display Error No 01 Imbalance arose Cause Incorrect loading of the rotor see chapter 2 2 1 Solution Balance your samples Error No 02 Permanent imbalance signal Cause Imbalance sensor is defective see chapter 6 4 6 Solution Imbalance sensor has to be replaced Error No 14 Leap of speed is to obig between two measurements Cause Shaft encoder defective or parting of a cable at the shaft encoder possibly loose magnet Solution Call service department Make sure speed magnet has a firm fit fix it with super glue Error No 30 Motor stalls or is defective Cause Tubes are too long brushes against the lid Solution Take shorter tubes Cause Motor bearings are defective Behebung Motor has to be replaced Error No 33 Open lid while the motor is running Cause The lid of the centrifuges has been opened while centrifuge was running Solution Close the lid of the centrifuge DANGER OF ACCIDENT Cause Control sw
6. By pressing the key accel decel the menu is activated Turn the potentiometer until the words on or off are indicated in the display SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 6 SERVICE INSTRUCTIONS on imbalance sensor Is activated off imbalance sensor is deactivated 6 3 2 Activation of the operation menu Part 2 6 3 2 1 Page 9 of 25 Activate the operation menu part 1 as described in chapter 6 3 1 By pressing the key stop longer than one second there will be asked for a code in the display rpm Now adjust the code 9876 by the turning knob and press once again the key stop Now you can carry out the below shown adjustments Adjustment of the centrifuge type Activate the operation menu part 2 as described in chapter 6 3 2 By pressing the key accel decel the several sub menus are activated Turn the potentiometer until the special digit t appears in the service display In the display rpm appears a number which shows the centrifuge type By pressing the key rpm rcf the turning knob is activated again You can adjust the different unit types with it By pressing the key start the adjusted value unit type is adopted SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH Page 10 of 25 6 SERVICE INSTRUCTIONS 6 3 2 2 Adjustment of the operation mode Activate the operation menu part 2 as described in chapter 6 3 2 By pressing
7. acing the foil keyboard Remove the incremental shaft encoder and the display Peel off the defective foil keyboard and clean the remaining glued joints Glue the new foil keyboard precisely in the recess Make sure the foil matches precisely and the window of the foil keyboard lies exactly over the display Attention If the foil keyboard is once glued she is defective after peeling her off Re assemble the control panel in reversed order and mount it back in the front housing 6 4 2 Removing the housing Remove the control panel as described in chapter 6 4 1 Remove all screws on the lower side of the housing remove Page 13 of 25 SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 6 SERVICE INSTRUCTIONS Remove the housing upwards and remove all relevant electrical contacts on the control board Re assemle the unit in reverse order 6 4 3 Removing the lid and the hinges Open the lid as wide as possible Hold the lid with one hand and remove the fixing nuts of the hinges The lid can now be removed completely Remove the hinges Remove the screws of the hinges Page 14 of 25 SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 6 SERVICE INSTRUCTIONS Re assemble the lid in reverse order Make sure the lid rests on the lid gasket straight and continuous Thighten the fastening screws firmly after the adjustment 6 4 4 Replacing the rotor chamber or lid gasket
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9. he error message system 7 2 3 Error messages Page 2 of 25 SERVICE INSTRUCTION Z 206 A CONTENT 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 Page 3 of 25 SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 5 TECHNICAL DATA 5 1 Acceleration times Z 206 A 120 V 230 V in seconds Rotor Number co CO e o o o D gt gt gt gt 5 5 5 5 221 54 V01 95 71 97 91 44 41 41 41 34 33 221 55 V01 91 T2 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 e o gt 5 221 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 5 3 Imbalance shut off data Z 206 A 120 V 230 V Rotor Number Shut off speed Allowed imbalance Shut off imbalance in rpm in gramme in gramme 221 54 V01 8 10 221 55 V01 8 10 220 95 V06 4 6 220 68 V04 4 6 There might occur low fluctuations from unit to unit regarding the acceleration and deceleration times and are therefore guide values only Page 4 of 25 SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 6 SERVICE INSTRUCTIONS
10. itch of the lid lock is defective Solution Call service department Page 19 of 25 SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 7 TROUBLE SHOOTING Error No 34 Lid contact defective Cause Control switch of the lid lock is defective Solution Call service department Error No 55 Overspeed Cause Speed sensor is defective Solution Re start the unit In case this error occurs again call service department Possibly loose speed magnet fix with super glue Error No 60 Intermediate circuit undervoltage Cause e Solution Error No 70 Relay hang up Cause e Solution Page 20 of 25 SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 8 MAINTENANCE 8 1 Service and maintenance 8 1 1 Maintenance and cleaning Maintenance Maintenance of the centrifuge is confined to keeping the rotor the rotor chamber and the rotor accessories clean as well as to regularly lubricating the rotor insert bolts of a swing out rotor if available Vaseline available in nearly each store is the most suitable lubricant The Vaseline must be free of resin and acids Lubricants containing molycote and graphite are not allowed Please pay special attention to anodized aluminium parts Breakage of rotors can be caused even by slightest damages In case of rotors buckets or tube racks getting in touch with corrosive substances the concerned spots have to be cleaned carefully Corrosive substances are for insta
11. m which is integrated in the power board Page 5 of 25 SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 6 2 3 6 2 4 6 2 5 6 2 6 6 2 7 Page 6 of 25 6 SERVICE INSTRUCTIONS 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 Incremental Shaft Encoder Upper Front Housing Rotor recognition and over speed protection The centrifuge will recognize the inputted rotor through the set up in the control panel s 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 rom pre selection indication will flash when starting the centrifuge Butt he regulation will accelerate the rotor only to its permitted rpm 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 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 elect
12. nce Alkalis Alkaline soap solutions Alkaline amines Concentrated acids Solutions containing heavy metals Water free chlorinated solvents Saline solutions e g salt water Cleaning Thorough cleaning not only has ist purpose in hygiene but also in avoiding corrosion based pollution order to avoid damaging anodized parts such as rotors reduction plates etc only pH neutral detergents with a pH value of 6 8 may be used for cleaning Alkaline cleaning agents pH value gt 8 must not be used After cleaning please ensure all parts are dried thoroughly either by hand or in a hot air cabinet max temperature 50 C It is necessary to coat anodized aluminium parts with anti corrosion oil regularly in order to increase their life spans and reduce corrosion predisposition Due to humidity or not hermetically sealed samples condensate may be formed The condensate has to be removed from the rotor chamber with a soft cloth regularly The maintenance procedure has to be repeated every 10 to 15 runs but at least once a week Page 21 of 25 SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 8 1 2 8 1 3 Page 22 of 25 8 MAINTENANCE Glass breakage With high g values the rate of glass tube breakage increases Glass splinters have to be removed immediately from rotor buckets adapters and the rotor chamber itself Fine glass splinters will scratch and therefore damage the protective surface coating
13. nt housing as described in chapter 6 4 1 Remove the motor as described in chapter 6 4 5 Lay the motor down on ist side and remove the 4 fixing screws of the swinging rubber and the two fixing screws of the green board on the rear side look up in chapter 6 2 7 Pull off the speed magnet carefully Attention Risk of breakage Replace the board Glue the speed magnet with super glue again in the right position and re assemble the unit in reverse order 6 4 7 Replacing the carbon brushes Remove the rotor chamber as describedin chapter 6 4 4 Lateral at the rear side of the motor are the carbon brushes behind the black knurled screws Turn them out and replace the carbon brushes For loosening the knurled srews you can also take a coin Page 16 of 25 SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 6 SERVICE INSTRUCTIONS 6 4 8 Replacing the power control board Remove the front housing as described in chapter 6 4 1 e Remove all electrical connections on the control board Remove the 4 screws and take the control board out Put in the new control board connect all electrical contacts and re assemble the unit in reverse order Attention If you change the control board you have to re adjust the unit as described in chapter 6 3 2 6 4 9 Replacing the lid lock Remove the control panel as described in chapter 6 4 1 Remove the electrical contact of the lid lock on the control board Remove
14. of a rotor If glass splinters remain in the rotor chamber fine metal dust will build up due to air circulation This very fine black metal dust will extremely pollute the rotor chamber the rotor the buckets and the samples Desinfection In case of infectious material spilling into the centrifuge the rotor and rotor chamber have to be disinfected right after the run Rotors may be autoclaved at a maximum temperature 121 C except rotor 220 58 V08 which must not be autoclaved The rotor and rotor chamber should be cleaned with a universal neutral disinfection agent e g on formalin base A disinfection spray is most suitable in order to easily reach all difficult to access spots ATTENTION Before applying any other cleaning resp decontamination method than recommended by the manufacturer contact the manufacturer to ensure yourself you would not damage the unit or the rotor by applying the designated method SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 9 SCHALTPLANE 9 1 Stromlaufpl ne DUSIUSH 3 Var RATE MUSH RE UON awen wma E 1N sBunu ole 161615 m ST O maa em enee we eme Haig xuuosuoqe SWYSH Ste msd BAS LAS Sojseuuos Bnid juswubisse uid BAS LAS 1epurqieAxoejs BunBejeg utd pueleldedg CEVyGO 566 00 LO c0 GO 3H PUN OIUOS 1 Bunueneig qn pueag o4juo3 4ps DI jeubew py soug equupeads Ajddns samod J8uuJ0JSUEJ Jamad ht a pa jeuBeuujexoe
15. orrectly 6 4 1 Replacing the front housing incremental shaft encoder and the display Page 11 of 25 Replacing the front housing Attention There are two diffenrent versions of the front housing resp of the control panel a Without notches Begin with chapter 6 4 2 Remove the interface cable on the control board Remove the connections of the lid lock and the cord of the emergency lid release Remove the three screws that fix the control panel remove b with notches Remove the lower covering by putting a screw driver into the 2 notches and then lever the front part out Pull the lower edge of the covering away from the mounting plate of the housing Pull the covering out of the upper guiding rails downwards e Remove the interface cable on the control board SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 6 SERVICE INSTRUCTIONS remove Replacing the incremental shaft encoder Remove the cap on top of the incremental shaft encoder With a socket wrench you can loosen the fastening nut now Loosen all electrical contacts to the shaft encoder on the back of the front housing Page 12 of 25 SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 6 SERVICE INSTRUCTIONS Replacing the display Loosen all electrical contacts to the display on the back of the front housing Remove the 4 fastening screws of the display and pull away the display upwards remove Repl
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17. ro motor at the end of each run and receives its signal from the control board 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 SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 6 SERVICE INSTRUCTIONS EE se N Eech T 2 Chapter 6 2 5 WT e 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
18. the key accel decel the several sub menus are activated Turn the potentiometer until the special digit C appears in the service display In the display rpm appears the operation mode adjustment no COOL HEAT By pressing the key rpm rcf the turning knob is activated again Now you can adjust the operation mode with it Adjust your centrifuge to the respective function COOL matches a refrigerated unit HEAt matches a heatable unit no matches none of both functions air cooling By pressing the key start the adjusted value operation mode is adopted ATTENTION In case this should be the first initiation of the control board it follows a running indication from 00 to 99 followed by PrESS rPM Confirm this running indication with the key rpm rcf During this stage the internal E Eprom is formatted 6 3 2 3 Checkup of the intermediate circuit voltage Activate the operation menu part 2 as described in chapter 6 3 2 By pressing the key accel decel the several sub menus are activated Turn the potentiometer until the special digit c appears in the service display In the display rpm appears the intermediate circuit voltage from 55 to 70 Volt when the lid is closed SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 6 SERVICE INSTRUCTIONS 6 4 Mounting support After performing any kind of assembling work please make sure all the grounded contacts are connected c
19. the string of the emergency release of the lod lock on the control board e e 4 6 ni 5 5 ne A EE remove Remove the fixing screws on the housing and put in the new lid lock Make sure that the lid rests on the lid gasket straight and continuous while the adjustment Tighten the fastening screws firmly after the adjustment Page 17 of 25 SERVICE INSTRUCTION Z 206 A HERMLE Labortechnik GmbH 7 TROUBLE SHOOTING 7 1 Error messages Cause Solution Preface The error messages are listed to help localize possible errors faster The diagnose referred to in this chapter may not always bet he case as they are only theoretically occuring errors and solutions Always please keep us informed about any kind of error occuring which is not listed in this chapter Only through your information we are able to improve and complete this service manual Many thanks in advance for your support HERMLE Labortechnik GmbH 7 2 Survey of possible error messages and their solutions 7 2 1 Lid release during power failure Emergency Lid Release In case of power failure or malfunction the lid of the centrifuge can be opened manually in order to protect your samples Please proceed as follows Switch the centrifuge off and unplug the power cord At the left side of the centrifuge there is a plastic stopper Remove this stopper Behind it there is a string Now open the lid of the centrifuge by pulling this
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