Hettich ROTINA 420R Repair Instructions
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Hettich ROTINA 420R Repair Instructions

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ROTINA 420
ROTINA 420 R
Repair instructions
06.08
Andreas Hettich GmbH & Co. KG
AR4701EN

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Summary of Contents for Hettich ROTINA 420R

  • Page 1 ROTINA 420 ROTINA 420 R Repair instructions 06.08 Andreas Hettich GmbH & Co. KG AR4701EN...
  • 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. Modifications reserved! AR4701EN / 06.08...

  • Page 3: Table Of Contents

    Description of the centrifuge..................7 Block diagram of the control................7 Operating panel (A2)..................8 Electronics ROTINA 420 (A1) resp. ROTINA 420R (A1)........8 Special features ....................9 Brake resistor (R1) .................... 9 Motor (M1) / Tacho system (B4, B2.1) .............. 9 Imbalance sensor (B2.2) .................
  • Page 4 6.14 Cooling parameters ..................51 6.14.1 Set the temperature unit ................51 6.14.2 Inquire the temperature values ..............52 6.14.3 Deactivate the temperature sensor (B2) at the top of the centrifuge chamber.................. 54 6.14.4 Compensate the temperature sensors ............ 55 6.15 Imbalance values....................
  • Page 5 10.9 Operating panel (A2)..................85 10.10 Rotary encoder (S1) ..................85 10.11 Brake resistor (R1) with overtemperature switch ......... 86 10.12 Temperature sensor (B1) at the bottom of the centrifuge chamber (only in centrifuges with cooling)..............86 10.13 Temperature sensor (B3) at the condenser (only in centrifuges with cooling)..............

  • Page 6: 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 7: Description Of The Centrifuge

    Description of the centrifuge Block diagram of the control 7/97...

  • Page 8: Operating Panel (A2)

    These microprocessor controlled centrifuges mainly consist of the following electrical components: • Operating panel (A2) • Electronics ROTINA 420 (A1) resp. Electronics ROTINA 420R (A1) • Motor (M1) with 2 speed sensors (B2.1, B4) and an imbalance sensor (B2.2) • Brake resistor (R1) •...

  • Page 9: Special Features

    • Status indication with a green LED: Standby: the green LED lights up Centrifugation run: the green LED lights up Case of error: the green LED flashes If the drive-processor detects an error, it switches off the motor. Special features •...

  • Page 10: Imbalance Sensor (B2.2)

    Imbalance sensor (B2.2) • An electronic sensor monitors the imbalance. • The imbalance sensor (B2.2) and the speed sensor (B2.1) are together in one housing, screwed to the bottom of the motor (M1). • Imbalance is detected only in running mode (run up, centrifuging and braking). •...

  • Page 11: Safety Devices

    3.10 Safety devices ⇒ with thermal overload protection Mains switch Over voltage protection and ⇒ on Electronics (A1) radio interference suppression filter Additional radio interference ⇒ in mains input circuit (only with 4706-01) suppression filter ⇒ on Electronics (A1), electrically protected Frequency converter Motor ⇒...

  • Page 12: Error Messages

    Error messages Perform a MAINS RESET • Switch off the mains switch (switch position "0"). • Wait at least 10 seconds and then switch on the mains switch again (switch position "Ι"). Brief description Error designation No. Brief description Page TACHO-ERROR Speed sensor on top of the motor: Speedometer pulses break down during rotation...
  • Page 13 Error designation Brief description Page SER I/O-ERROR TIME OUT, communication error with frequency converter SER I/O-ERROR Communication error with frequency converter SER I/O-ERROR NAK, communication error with frequency converter °C / *-ERROR Overtemperature on condenser °C / *-ERROR Overtemperature in centrifuge chamber °C / *-ERROR Temperature sensor at the bottom of the centrifuge chamber is defective...
  • Page 14 Error designation Brief description Page SENSOR-ERROR No mains synchronisation SENSOR-ERROR Imbalance sensor – error (x-axis) SENSOR-ERROR Imbalance sensor – error (y-axis) SENSOR-ERROR Imbalance sensor - error: temperature sensor of the imbalance sensor defective TACHO-ERROR Speed sensor at the bottom of the motor: Speedometer pulses break down during centrifugation run °C / *-ERROR...

  • Page 15: Description And Elimination Of Errors

    Description and elimination of errors After occurrence of a fault the cooling / heating switches off. The standby cooling takes place after the rotor is at standstill and the lid is closed. During a fault the lid can be opened after the rotor is at standstill. TACHO - ERROR 1 wait 3:00 During centrifugation the speedometer pulses of the speed sensor (B4) on top of the motor are interrupted.
  • Page 16 TACHO - ERROR 2 wait 3:00 After start-up no speedometer pulses will be received from both speed sensors. The rotor slows down braked until it stops. No further user operation possible. After the rotor is at standstill and the 3 minutes have elapsed the lid lock will be released and the lid can be opened.
  • Page 17 IMBALANCE Imbalance on motor axle. The rotor slows down braked until it stops. • Reset error code: Open the lid or perform a MAINS RESET. • Weight difference in rotor components. • The supporting lugs of the rotor are not lubricated. •...
  • Page 18 CONTROL - ERROR 4.2 Error during testing the lid switches after the start command. No further user operation possible except opening the lid. • Reset error code: Perform a MAINS RESET. • Switches of the lid lock defective. Check the function of both switches, see pg. 62, chapter 6.17, item 21.
  • Page 19 CONTROL - ERROR 4.5 Position switch "Mo" of the motor-driven lid lock closes during the centrifugation run. The rotor slows down braked until it stops. No further user operation possible except opening the lid. • Reset error code: Perform a MAINS RESET. •...
  • Page 20 CONTROL - ERROR 6 Lid lock error. No further user operation possible except opening the lid. • Reset error code: Perform a MAINS RESET. • The motor of the lid lock runs too slowly or it is blocked. The position switch "Mc" or "Mo" must close within 5 seconds. •...
  • Page 21 ROTORCODE 10.3 Error during reading the rotor code. The rotor slows down braked until it stops. No further user operation possible except opening the lid. • Reset error code: Perform a MAINS RESET. • Magnetic code on the rotor is defective, see pg. 91, chapter 11.1. •...
  • Page 22 N < MIN 13 Insufficient speed, motor slippage is too high. This error is displayed if the rotor speed (ACTUAL speed) is longer as 30 seconds lower than the SET speed. The rotor slows down braked until it stops. No further user operation possible except opening the lid. •...
  • Page 23 CONTROL - ERROR 25.2, 25.3 EEPROM: Write or communication error. The rotor slows down braked until it stops. No further user operation possible except opening the lid. • Reset error code: Perform a MAINS RESET. • Electronics (A1) is defective. SER I/O - ERROR 31, 34, 36 Communication error with the frequency converter.
  • Page 24 °C / * -ERROR 52 Overtemperature in centrifuge chamber The rotor slows down braked until it stops. No further user operation possible except opening the lid. • Reset error code: Perform a MAINS RESET. • Temperature in centrifuge chamber > 60°C / 140°F, with option heating/cooling >...
  • Page 25 °C / * -ERROR 54 The temperature in the centrifuge chamber measured by the temperature sensor (B2) is out of the valid range. The temperature sensor (B2) does not exist in the ROTINA 420 R. If the temperature sensor B2 (= T2) is activated in the "Select Menu", °C / * -ERROR 54 will be displayed.
  • Page 26 General notes for FU/CCI-ERROR 60 to FU/CCI-ERROR 61.131 If the drive-processor detects an error, it switches off the motor. After occurrence of a fault the green LED on the electronics (A1) flashes quickly. FU/CCI-ERROR 60 Error when checking the enable signal to frequency converter (drive- processor).
  • Page 27 FU/CCI-ERROR 61.4 OverT FU Overtemperature in the frequency converter. Temperature ≥ 78°C / 172°F. The rotor slows down without braking until it stops. No further user operation possible except opening the lid. • Reset error code: Perform a MAINS RESET. •...
  • Page 28 FU/CCI-ERROR 61.13 Short cir Short circuit switch-off of the frequency converter. The rotor slows down without braking until it stops. No further user operation possible except opening the lid. • Reset error code: Perform a MAINS RESET. • Short circuit in the motor. Remove plug S104 and check at the plug pin 1, pin 2, pin 3 the resistance of the motor coils.
  • Page 29 FU/CCI-ERROR 61.18 Frequency converter receives wrong direction of rotation command. The rotor slows down without braking until it stops. No further user operation possible. • Reset error code: Perform a MAINS RESET. • Electronics (A1) is defective. FU/CCI-ERROR 61.19 Overspeed The frequency converter recognises excess speed.
  • Page 30 FU/CCI-ERROR 61.128 Internal frequency converter error. The rotor slows down without braking until it stops. No further user operation possible. • Reset error code: Perform a MAINS RESET. • Electronics (A1) is defective. FU/CCI-ERROR 61.129 System error of the frequency converter. The rotor slows down without braking until it stops.
  • Page 31 SENSOR - ERROR 91 - 92 Imbalance sensor error. SENSOR - ERROR 91 = x-axis, SENSOR - ERROR 92 = y-axis The rotor slows down braked until it stops. No further user operation possible. • Reset error code: Perform a MAINS RESET. •...
  • Page 32 TACHO – ERROR 96 wait 3:00 During centrifugation the speedometer pulses of the speed sensor (B2.1) at the bottom of the motor are interrupted. The rotor slows down braked until it stops. No further user operation possible. After the rotor is at standstill and the 3 minutes have elapsed the lid lock will be released and the lid can be opened.
  • Page 33 PROGRAMM-ERROR 100 Ceck sum error with programs (single programs). The rotor slows down braked until it stops. No further user operation possible. • Reset error code: Perform a MAINS RESET. • Delete all programs (single programs), see pg. 68, chapter 6.18. The centrifugation data in all programs will be overwrite with default values.
  • Page 34 N > ROTOR MAX Speed in the selected program greater than the maximum speed of the rotor. No start possible. • Check and reduce the set speed. FC INIT ERROR Initialisation of the frequency converter is faulty. No further user operation possible except opening the lid. •...

  • Page 35: Settings And Interrogations

    Settings and interrogations All settings and interrogations are performed via the keyboard. The corresponding menus are selected by pressing keys or combinations of keys. Summary of the possible settings and interrogations Acoustic signal, see pg. 38, chapter 6.4. Address of the centrifuge, see pg. 41, chapter 6.7. Automatic repetition of the centrifugation run, see pg.

  • Page 36: Inquiry The System Information

    It is at any time possible to terminate the procedure by pressing the key. STOP / OPEN Action Display / Comment → 1. Switch on the mains e.g. ROTINA 420R switch. Centrifuge model → e.g. V 01.01 Program version →...

  • Page 37: Inquire And Change The Operating Hours And Inquire The Number Of The Centrifugation Runs

    It is at any time possible to terminate the procedure by pressing the key. In this case the adjustments are not saved. STOP / OPEN Action Display / Comment → 1. Switch on the mains e.g. ROTINA 420R switch. Centrifuge model → e.g. V 01.01 Program version →...

  • Page 38: Set The Acoustic Signal

    Action Display / Comment key. → e.g. OP Time ext = 89h27m 4. Press the START External operating hours. If the external operating hours should not be changed, press the key to inquire the PROG internal operating hours. → e.g. OP Time ext = < 89h27m > 5.
  • Page 39 Action Display / Comment → 1. Switch on the mains e.g. ROTINA 420R switch. Centrifuge model → e.g. V 01.01 Program version → e.g. Rotor 4 Nmax=4500 R=184 Rotor information → e.g. 6 4000 5:20 Display of the centrifugation data.

  • Page 40: Set The Centrifugation Data Displayed After Switch-On

    It is at any time possible to terminate the procedure by pressing the key. In this case the adjustments are not saved. STOP / OPEN Action Display / Comment → 1. Switch on the mains e.g. ROTINA 420R switch. Centrifuge model → e.g. V 01.01 Program version →...

  • Page 41: Set The Functions Ramp Unit, Rcf-Integral, B-Ramp And Multi Programs

    Action Display / Comment key. → 6. Press the START Store settings ... The setting will be stored. → -> Settings → 7. To exit the menu ∗∗∗ Machine Menu ∗∗∗ press the STOP / OPEN → e.g. 6 4000 5:20 key twice.

  • Page 42: Logging The Occurred Faults

    It is at any time possible to terminate the procedure by pressing the key. STOP / OPEN Action Display / Comment → 1. Switch on the mains e.g. ROTINA 420R switch. Centrifuge model → e.g. V 01.01 Program version →...
  • Page 43 #00 Temp T2 = --- Temperature value of the temperature sensor (B2) at the top of the centrifuge chamber (does not exist in the ROTINA 420R, therefore deactivated "---"). → e.g. #00 Temp T3 = 23 °C Temperature value of the temperature sensor (B3) on the condenser.
  • Page 44 Action Display / Comment Values of the parameters when the fault occurred: → • Turn the control e.g. #00 FC Mode 000 = 0100 knob to the right. → e.g. #00 FC Stat 051 = 8040 State of the frequency converter. →...

  • Page 45: Logging Of Certain Procedures (Events)

    It is at any time possible to terminate the procedure by pressing the key. STOP / OPEN Action Display / Comment → 1. Switch on the mains e.g. ROTINA 420R switch. Centrifuge model → e.g. V 01.01 Program version →...
  • Page 46 Action Display / Comment key. → e.g. #0 Rotor Chg = 345h19m 4. Press the START #0 = last rotor change. The displayed internal operating hours correspond to the time of the rotor change. → e.g. #1 Rotor Chg = 200h45m •...

  • Page 47: Speed Values During The Centrifugation Run

    PROG It is at any time possible to terminate the procedure by pressing the STOP / OPEN Aktion Anzeige / Kommentar → 1. Switch on the mains e.g. ROTINA 420R switch. Centrifuge model → e.g. V 01.01 Program version →...

  • Page 48: Check Both Speed Sensors

    It is at any time possible to terminate the procedure by pressing the STOP / OPEN The both speed sensors can also be checked in the menu "Test". Aktion Anzeige / Kommentar → 1. Switch on the mains e.g. ROTINA 420R switch. Centrifuge model → e.g. V 01.01 Program version →...

  • Page 49: Set The Centrifuge Model

    6.12 Set the centrifuge model The centrifuge model, which is displayed after switch-on can be set. Model Description ROTINA 420 Centrifuge without cooling ROTINA 420 R Centrifuge with cooling ROTINA 420 RH Centrifuge with option heating/cooling The setting of the centrifuge model is only possible if the rotor is at standstill. It is at any time possible to terminate the procedure by pressing the key.

  • Page 50: Blank The Centrifuge Model In The Display

    6.13 Blank the centrifuge model in the display The display of the centrifuge model after switching on the unit can be blanked. With OEM-units the display of the centrifuge model must be blanked. To blank the display of the centrifuge model is only possible if the rotor is at standstill.

  • Page 51: Cooling Parameters

    It is at any time possible to terminate the procedure by pressing the key. In this case the adjustments are not saved. STOP / OPEN Action Display / Comment → 1. Switch on the mains e.g. ROTINA 420R switch. Centrifuge model → e.g. V 01.01 Program version →...

  • Page 52: Inquire The Temperature Values

    It is at any time possible to terminate the procedure by pressing the key. STOP / OPEN Action Display / Comment → 1. Switch on the mains e.g. ROTINA 420R switch. Centrifuge model → e.g. V 01.01 Program version →...
  • Page 53 Action Display / Comment 4. Press the key. → e.g. T1= 28 T3= 22 ∗ T/°C T2= --- T1 = Temperature value of the temperature sensor (B1) at the bottom of the centrifuge chamber. T2 = Temperature value of the temperature sensor (B2) at the top of the centrifuge chamber.

  • Page 54: Deactivate The Temperature Sensor (B2) At The Top Of The Centrifuge Chamber

    6.14.3 Deactivate the temperature sensor (B2) at the top of the centrifuge chamber The ROTINA 420 R / 420 RH has no temperature sensor (B2) at the top of the centrifuge chamber and therefore the temperature sensor (B2) must be absolutely deactivated in the program.

  • Page 55: Compensate The Temperature Sensors

    6.14.4 Compensate the temperature sensors The offset compensation is carried out to correct the measurement deviations of the temperature sensors (B1, B3) and the Electronics (A1). T1 = Temperature value of the temperature sensor (B1) at the bottom of the centrifuge chamber.
  • Page 56 Action Display / Comment 3. Press the key. → e.g. T1/°C +26.0 START +25.5 -0.5 If OPEN LID !! will be displayed, press the key. STOP / OPEN T1/°C = Temperature value of the temperature sensor at the bottom of the centrifuge chamber. °C = in degree Celsius, °F = in degree Fahrenheit.

  • Page 57: Imbalance Values

    It is at any time possible to terminate the procedure by pressing the key. STOP / OPEN Action Display / Comment → 1. Switch on the mains e.g. ROTINA 420R switch. Centrifuge model → e.g. V 01.01 Program version →...

  • Page 58: Inquiry The Current And The Maximum Imbalance Values

    It is at any time possible to terminate the procedure by pressing the key. STOP / OPEN Action Display / Comment → 1. Switch on the mains e.g. ROTINA 420R switch. Centrifuge model → e.g. V 01.01 Program version →...

  • Page 59: Setting The Imbalance Switch-Off

    Action Display / Comment 4. Press the key so → e.g. Imb Xa= 0 Ya= 1 T/°C Xm= 1 Ym= 3 often until the Xa = actual X-value in per cent of the imbalance following will be sensor. displayed: Ya = actual Y-value in per cent of the imbalance sensor.
  • Page 60 The setting of the imbalance switch-off is only possible if the rotor is at standstill. It is at any time possible to terminate the procedure by pressing the key. In this case the adjustments are not saved. STOP / OPEN Action Display / Comment →...

  • Page 61: Set The Transmission Rate (Baud Rate) Of The Serial Interface

    6.16 Set the transmission rate (baud rate) of the serial interface The transmission rate (baud rate) of the serial interface can be adjusted. The setting of the transmission rate (baud rate) of the serial interface is only possible if the rotor is at standstill. It is at any time possible to terminate the procedure by pressing the key.

  • Page 62: Function Test

    6.17 Function test The individual components of the centrifuge can be tested on its function. The function test is only possible if the rotor is at standstill In order to be able to check the function of the two speed sensors the lid must be opened before starting the function test.
  • Page 63 Action Display / Comment → 03 RPM Rot = 0 6. Press the key. PROG Mot = 0 Speed Rot = Speed value of the speed sensor (B4) on top of the motor. Mot = Speed value of the speed sensor (B2.1) at the bottom of the motor.
  • Page 64 Action Display / Comment → 05 Key Temp 10. Press the key. T/°C key functions. T/°C → 05 Key Acc/Dec 11. Press the key. key functions. → 05 Key RCF 12. Press the key. key functions. → 05 Key RPM 13.
  • Page 65 Action Display / Comment → 08 Closure Motor off 20. Press the key. PROG Function test of the motor of the lid lock. → 08 Closure Motor on • Turn the control The motor of the lid lock will be activated. knob one step to the right.
  • Page 66 Action Display / Comment → e.g. 15 T IR = --- 27. Press the key. PROG Temperature value of an external sensor (does not exist in ROTINA 420 / 420 R). → e.g. 16 T ext = --- 28. Press the key.
  • Page 67 Action Display / Comment → 23 Relay (Relais 35. Press the key. PROG ) MV1 off Function test of the relay for the fan. Relay and fan exists only in ROTINA 420 R / 420 RH. → 23 Relay (Relais •...

  • Page 68: Delete Programs And Program Linking

    6.18 Delete programs and program linking The deletion of programs and program linking is only possible if the rotor is at standstill. The deletion of individual programs or program linking is not possible. Always all programs or program linking are set back to default values. It is at any time possible to terminate the procedure by pressing the key.

  • Page 69: Display The Contents Of The Memory Cells Of The Eeprom

    EE INIT : Single Prog : 99 or EE INIT : Multiple Prog : 24 8. Press the All programs or program linking are deleted and key. STOP / OPEN afterwards the "Select Menu" will be terminated. e.g. ROTINA 420R → Centrifuge model e.g. V 01.01 → Program version e.g.

  • Page 70: Initialise The Eeprom

    Action Display / Comment • Turn the control → e.g. Adr: 0010 = 000003E3 - 00000215 Content of the memory cells 10, 12, 14, 16, 18, 1A, 1C, 1E. knob to the right. Example: Content of the address 16 = E3 By turning the control knob the contents of the memory cells 0000 up to 7FF0 can be displayed.

  • Page 71: Automatic Repetition Of The Centrifugation Run

    EE INIT : Global Data … The EEPROM is initialised and afterwards the "Select key. STOP / OPEN Menu" will be terminated. → e.g. ROTINA 420R Centrifuge model → e.g. V 01.01 Program version → e.g. Rotor 4 Nmax=4500 R=184 Rotor information →...
  • Page 72 Action Display / Comment → ∗∗∗ Select Menu ∗∗∗ 1. Keep the START and the STOP / OPEN key pressed and switch on the mains switch at the same time. → -> Cont Run 2. Press the key so PROG often until the following will be displayed: →...

  • Page 73: Update The Software Of The Control Processor

    → e.g. 6 10. Press the key. START 3000 1:00 Test run with automatic repetition of the centrifugation run is carried out. → 11. Press the e.g. Run# STOP / OPEN t break = 0:34 key during the break The test run is terminated and the lid opens. time to terminate the →...
  • Page 74 8. Click on the button "Connect to target". The connection to the centrifuge is made and "bootstrap-loader finished" is displayed. 9. Click on the button "Open HexFile" to open the window "Öffnen". If the connection to the centrifuge was made the first time, the window “Öffnen” appears automatically.

  • Page 75: Functional Check After A Repair

    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 loaded rotor must be performed. During the test run the followings must be checked: •...

  • Page 76: General Arrangement Of The Components

    General arrangement of the components Item Designation Lid ROTINA 420 Lid ROTINA 420 R Window with gluing ring Hinge Pneumatic spring Packing ring Front panel ROTINA 420 Front panel ROTINA 420 R Operating panel - frame Operating panel - electronics Rotary encoder with cable Rotary knob with flat spring Motor cover ROTINA 420...
  • Page 77 Rotina 420_420R IPB parts list by line item This list assumes 115 V versions (4701-01/4706-01) Rotina 420 (4701-01) Rotina 420R (4706-01) E2769 ---- ---- E2777 E1323 E1323 E2750 E2750 E2770 E2770 E2771 E2771 E2862 E2862 E2865 E2865 E2875 E2876 E2768...
  • Page 78 Fig. 2 Fig. 3 77/97...
  • Page 79 Fig. 4 Bei Ausführung 120 V 32/1 33/1 Fig. 5 78/97...
  • Page 80 7 / 8 Fig. 6 Fig. 7 Fig. 8 79/97...

  • Page 81: Mounting And Removing Components

    10 Mounting and removing components Before mounting and removing components the mains switch must be switched off and the centrifuge must be disconnected from the mains supply. 10.1 Removing the front panel • Open the lid. • Switch off the mains switch and disconnect the centrifuge from the mains supply. •...

  • Page 82: Hook In The Front Panel At The Support Sheet For Electronics (A1)

    10.3 Hook in the front panel at the support sheet for electronics (A1) In order to perform electrical measurements at the centrifuge it is necessary to hook in the front panel at the support sheet for electronics (A1). • Remove the front panel and the support sheet for electronics (A1) as described in chapters 10.1, 10.2, pg.

  • Page 83: B2.1, At The Bottom Of The Motor) / Imbalance Sensor (B2.2)

    10.5 Removing Motor (M1) / Rubber-metal bearings / Speed sensor (B2.1, at the bottom of the motor) / Imbalance sensor (B2.2) • Remove the front panel and the support sheet for electronics (A1) as described in chapters 10.1, 10.2, pg. 80. •...

  • Page 84: Motor-Driven Lid Lock

    10.7 Motor-driven lid lock All plastic parts on the motor-driven lid lock are wearing parts and must be replaced if they are worn out. 10.7.1 Removing the motor-driven lid lock • Remove the front panel and the support sheet for electronics (A1) as described in chapters 10.1, 10.2, pg.

  • Page 85: Replacing The Eccentric Disc

    10.7.4 Replacing the eccentric disc • Remove the lid lock as described in chapter 10.7.1, pg. 83. • Remove the right lid lock as described in chapter 10.7.3, pg. 83. • Loosen the hexagon socket screw (pg. 79, Fig. 8, c) down on the eccentric disc (pg.

  • Page 86: Electronics (A1)

    10.8 Electronics (A1) • Remove the front panel as described in chapter 10.1, pg. 80. • Unscrew the 9 fastening screws (Fig. 12, a) of the electronics (A1) at the support sheet. • Remove the support sheet for electronics (A1) as described in chapter 10.2, pg. 80. •...

  • Page 87: Brake Resistor (R1) With Overtemperature Switch

    10.11 Brake resistor (R1) with overtemperature switch The overtemperature switch at the brake resistor (R1) is not separately available. • Remove the front panel and the support sheet for electronics (A1) as described in chapters 10.1, 10.2, pg. 80. • Remove the motor as described in chapter 10.5, pg. 82. •...

  • Page 88: Fan (M3) At The Condenser (Only In Centrifuges With Cooling)

    10.13 Temperature sensor (B3) at the condenser (only in centrifuges with cooling) • Remove the front panel and the support sheet for electronics (A1) as described in chapters 10.1, 10.2, pg. 80. • Remove the upper part of the centrifuge housing as described in chapter "Removing the upper part of the centrifuge housing".

  • Page 89: Starting Capacitor / Starting Relay (Only In Centrifuges With Cooling)

    10.16 Starting capacitor / starting relay (only in centrifuges with cooling) In 230 V version: • Remove the front panel as described in chapter 10.1, pg. 80. • Press the locking mechanism on the left and right at the cover (pg . 78, Fig. 5, c) of the compressor with a screwdriver and remove the cover.

  • Page 90: Transformer (T1, Only In 120 V Version)

    10.19 Transformer (T1, only in 120 V version) • Remove the front panel and the support sheet for electronics (A1) as described in chapters 10.1, 10.2, pg. 80. • Remove the motor as described in chapter 10.5, pg. 82. • Loosen the cables of the transformer at the terminal block X2 (S. 77, Fig. 3, d ; S.

  • Page 91: Pneumatic Spring

    10.22 Pneumatic spring The pneumatic springs (pg. 77, Fig. 2, item 5 ; pg. 78, Fig. 4, item 5) may be dismounted only if the lid is open, i.e. if the pneumatic springs are not under tension. • Open the lid. •...

  • Page 92: Technical Documents

    11 Technical documents 11.1 Tachometer code configuration of the rotors Example: tachometer code no. 1 Rotor viewed from underneath START North Pole START-STOP combination Information tachometer code determines: 1. maximum speed of rotor 2. run up and braking ramps 3. control response of electronics e.g.

  • Page 93: Cooling Diagram

    11.2 Cooling diagram Zentrifuge centrifuge Elektronik Zentrifuge Electronc centrifuge Evaporator (centrifuge chamber) Capillary tube Air-cooled condenser Filter dryer (flow direction vertical from top to bottom !!!) B3 Temperature sensor on condenser (controlled by centrifuge electronics) M2 Compressor 92/97...

  • Page 94: Connecting Diagram

    11.3 Connecting diagram 11.3.1 Abbreviations of the cable colours Abbreviation Colour black brown blue gold green GNYE green-yellow grey orange pink silver turquoise Transp. transparent violet white yellow 93/97...

  • Page 95: Connecting Diagram Rotina 420 / 420 R

    11.3.2 Connecting diagram ROTINA 420 / 420 R 94/97...
  • Page 96 95/97...
  • Page 97 96/97...

  • Page 98: Technical Specifications

    11.4 Technical specifications Andreas Hettich GmbH & Co. KG Manufacturer D-78532 Tuttlingen Model ROTINA 420 ROTINA 420 R 4706, 4706-20, Type 4701 4701-01 4706-01 4706-50 100–127V 100 V Mains voltage (± 10%) 200 – 240 V 1∼ 100 – 127 V 1∼...

This manual is also suitable for:

Rotina 420

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