Hettich EBA 20S Repair Instructions Download Page 29

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10.2.3

Brake resistor R1 and overtemperature fuse F3

Brake resistor R1

Remove plug S405 and measure between
pin 1 and 2 :

230 V Version:

≈

330

Ω

120 V Version:

≈

Ω

Overtemperature fuse F3

Remove plug S405 and measure between
pin 3 and 4 :

Fuse OK :

≈

Ω

Fuse defective:

∞

Ω

R 1

F 3

S405

Ω

10.2.4

Lid lock Y1

Lid switch:

Remove plug S404 and measure between
pin 5 and 6 :
Switch pressed :

≈

Ω

Switch inoperative:

∞

Ω

Lid lock solenoid K1

Remove plug S404 and measure between
pin 1 and 3 :
230 V Version:

≈

5.7 K

Ω

S404

WH WH

Summary of Contents for EBA 20S

Page 1: ...03 08 Andreas Hettich GmbH Co KG AR2080EN EBA 20S Repair instructions...

Page 2: ...1 705 0 Fax 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...

Page 3: ...ithout Error indications 16 6 Settings and enquiries 18 6 1 Setting the machine version 18 6 2 Enquiry the machine version 19 6 3 Enquiry the programme versions 20 6 4 Brake adjustment 20 6 5 Lid lock...

Page 4: ...results 28 10 2 1 Speed sensor B3 Tacho 28 10 2 2 Motor 28 10 2 3 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...

Page 5: ...on of the centrifuge please see operating instructions We reserve all rights for these technical documents 2 Symbol meanings Symbol on the machine Attention general hazard area Before using the centri...

Page 6: ...ock system Imbalance switch All electronic components are on mains due to the DC coupling Netz Mains Verschlu Lid lock Deckelschalter Lid switch Uwuchtschalter Imbalance switch Bremswiderstand Brake r...

Page 7: ...ion of Control panel Voltage supply Frequency converter The power board carries out the following tasks Power supply 15 V DC for imbalance switch Power supply 5 V DC for control panel Generating the m...

Page 8: ...380 V with the 230 V version and 203 V with the 120 V version to the brake resistor in a controlled manner An overtemperature fuse protects the brake resistor against overheating When the overtemperat...

Page 9: ...ge 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 acco...

Page 10: ...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 Oversp...

Page 11: ...2 GND to pin 3 UB 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 Sys...

Page 12: ...till 4 Communication Error Communication error between control board and power board Error consequence Drive switch off No brake effective Error cause Loose contact in flat ribbon cable Control board...

Page 13: ...sensor B3 is 250 RPM higher than the maximum speed of the rotor Error consequence Drive switches off No brake effective Error cause Speed sensor B3 defective Power board A1 defective Measurement Chec...

Page 14: ...n plug S401 Pin 4 or 5 Measurement Remove plug S405 and measure between Pin 4 and 5 Switch open 0 OK Switch closed defective See also section 10 2 Error code reset Perform a MAINS RESET after standsti...

Page 15: ...Lid closed 0 Lid open 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 conseque...

Page 16: ...ath 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 L...

Page 17: ...e lid Release the lid by using the emergency release No display Error No power supply on control board no display Error consequence No operation possible Error cause No mains supply Power board A1 def...

Page 18: ...ayed 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 All electronic components are on mai...

Page 19: ...he 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 ke...

Page 20: ...erform a MAINS RESET 6 4 Brake adjustment 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...

Page 21: ...2 3 4 5 n c 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...

Page 22: ...e test run the followings must be checked Function of the keys the display and the LEDs Run up and slow down time max speed of the rotor Values see operating instructions chapter Anhang Appendix Rotor...

Page 23: ...9 5 Mains switch Q1 A1 9 7 Appliance plug 9 7 Imbalance switch S1 S503 A1 9 8 Before assembling or disassembling components the following working processes must first be carried out to reach the comp...

Page 24: ...bber metal or motor being installed 9 2 Power board A1 Wait at least 2 minutes after disconnecting the centrifuge from the mains until the intermediate circuit capacitors of the frequency converter ar...

Page 25: ...able from the control board Assemble in reverse order 9 7 Appliance plug with mains switch Press the upper and the lower fastening clip and remove the appliance plug out of the housing Remove the plug...

Page 26: ...26 34 10 Circuit diagrams Used cable colours and their abbreviations Abbreviation Colour BK black BN brown BU blue GN YE green yellow GY grey RD red WH white YE yellow...

Page 27: ...ngsteil Power board Unwuchtschalter Imbalance switch Deckel verriegelung Lid lock Motor bertemp schalter Overtemp switch bertemp sicherung Overtemp fuse Bremswiderstand Brake resistor S402L S402N L1 N...

Page 28: ...signal Plug S502 measure between Pin 2 GND and Pin 4 8 15V 0V 8 15V 0V 2 pulses per revolution B 3 S502 BK RD WH 10 2 2 Motor Motor coil Remove plug S401 and measure between two lines 230 V version 8...

Page 29: ...V Version 82 Overtemperature fuse F3 Remove plug S405 and measure between pin 3 and 4 Fuse OK 0 Fuse defective L1 R 1 F 3 S405 10 2 4 Lid lock Y1 Lid switch Remove plug S404 and measure between pin 5...

Page 30: ...Intermediate voltage on power board A1 The intermediate voltage has to be measured during the run run up run and run down 230 V version 380 V DC 120 V version 203 V DC Steuerteil Control panel Unwuch...

Page 31: ...010 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 relativ...

Page 32: ...trol panel 5 Lid lock 6 Motor 7 Power board 8 Anti twist device 9 Rubber metal bearing 10 Speed sensor 11 Housing lower part 12 Rubber foot 13 Appliance plug 14 Brake resistor 15 Overtemperature fuse...

Page 33: ...ppliance plug 25 Assembling 23 Brake adjustment 20 Brake resistor 8 25 29 Cable colours 26 Circuit diagram 27 Control panel 7 24 Controller Watchdog c 14 Description and elimination of errors 11 Disas...

Page 34: ...s 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 27 Power board 7 24 30 Settings 18 Signals 28...

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