Hettich MIKRO 22 Repair Instructions
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Hettich MIKRO 22 Repair Instructions

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Repair instructions
MIKRO 22 / 22 R
© 02.04
AR025GB
Andreas Hettich GmbH & Co. KG • Gartenstraße 100 • D-78532 Tuttlingen • Germany
Phone: (07461) 705-0 • Fax: (07461) 705-125 • Internet: www.hettichlab.com • e-mail: info@hettichlab.com, service@hettichlab.com

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Summary of Contents for Hettich MIKRO 22

  • Page 1 Repair instructions MIKRO 22 / 22 R © 02.04 AR025GB Andreas Hettich GmbH & Co. KG • Gartenstraße 100 • D-78532 Tuttlingen • Germany Phone: (07461) 705-0 • Fax: (07461) 705-125 • Internet: www.hettichlab.com • e-mail: info@hettichlab.com, service@hettichlab.com...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION...................... 6 DESCRIPTION OF THE NEW HETTICH CENTRIFUGES ........7 2.1. Functional structure of the Mikro 22 / 22 R ............7 2.2. Control panel (CP) ................... 7 2.3. Supply board (SB) A1 ..................8 2.4. Frequency converter (FC) A2 ................8 2.5.
  • Page 3 Motor M1 / Vibration damper................33 9.3. FC (frequency converter) ................33 9.4. SB (supply board) A1 ..................33 9.5. CB A3 (cooling board) only MIKRO 22 R ............33 9.6. CP (control panel) A4..................34 9.7. EPROM at CP ....................34 9.8.
  • Page 4 SPEEDOMETER-CODE-POSITION OF THE ROTORS ........38 CIRCUIT DIAGRAMS..................40 11.1. Mains supply with supply board (SB) 230 V........... 40 11.2. Mains supply with supply board (SB) 115 V........... 41 11.3. Circuit diagram supply board (SB) ..............42 11.4. Connecting diagram and component layout supply board (SB) ..... 43 11.5.
  • Page 5 Abbreviations Control panel Frequency converter Supply board Cooling board Control cable Lid locking Braking chopper Brake resistor Mains reset Mains switch OFF - ON Error cause Error consequence Error remedy Measurement Error-code reset 5/51...

  • Page 6: Introduction

    • This repair instruction is only intended for specialized staff authorized by HETTICH. Interventions and modifications at centrifuges, which have been conducted by persons not authorized by HETTICH, 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 HETTICH expire.

  • Page 7: Description Of The New Hettich Centrifuges

    Description of the new Hettich centrifuges 2.1. Functional structure of the Mikro 22 / 22 R These microprocessor-controlled centrifuges are comprised of the following electrical components: • Control panel (CP), microprocessor-controlled • Supply board (SB) • Frequency converter (FC, motor control), microprocessor-controlled •...

  • Page 8: Supply Board (Sb) A1

    • 12 V DC and 5 V DC supply for the SB. • 12 V DC supply for the CP. • 12 V DC supply for the CB (only Mikro 22 R). • Plugging station X5 for mains power supply, LL magnet and transmission of the signalling circuit for LL switch (open/closed over opto-coupler to the CP).

  • Page 9: Special Features

    • The CP issues the following via the serial interface: − Speed − Starting and braking levels − Control commands START, BRAKE, STOP • State display by LED´s: In standby mode the green LED is on In running mode the green LED is on In fault mode the green LED flashes If the FC processor detects a fault, it shuts down itself automatically and triggers the...

  • Page 10: Imbalance Switch

    2.7. Imbalance switch • A switch detects any imbalance. • Imbalance can only be detected in running mode (starting, centrifuging and braking). • If any imbalance is detected, the drive is changed over to braking. 2.8. Interlocking • Opening of the LL is prevented by a latch. The LL can only be opened when the relay on the SB is energized by the CP.

  • Page 11: Offset Calibration

    2.11. Offset calibration • Offset calibration is performed in order to equalize the tolerances of the temperature sensor and the electronics. Perform Offset calibration Where/How when replacing: − the temperature sensor calibrate the temperature sensor. − the CP calibrate temperature sensor and read out the old offset values and put them in the new CP.

  • Page 12: Requirements For Error Identification

    Requirements for error identification 3.1. Correct power supply • All fuses of house installation are intact. Mains voltage is present on the following circuits: • Cable leading to mains cable • Appliance plug • Mains switch • Radio interference suppression filter •...

  • Page 13: Error Messages

    Error messages 4.1. Brief description • Error messages in: MIKRO 22 MIKRO 22 R Error designation Brief description Page TACHO-ERROR Speedometer pulses break down during rotation TACHO-ERROR No speedometer pulses after start command IMBALANCE Imbalance on motor axle CONTROL-ERROR LL error, lid opened without recognizing that motor had stopped N >...
  • Page 14 Error designation Brief description Page No cooling Overtemperature at condenser (No error displayed) Overtemperature in centrifuge chamber °C / *-ERROR °C / *-ERROR Temperature sensor in centrifuge chamber is defective FU/CCI-ERROR Faulty release signal to FC FU/CCI-ERROR FC - error: computing section FU/CCI-ERROR FC - error:...

  • Page 15: Description And Elimination Of Errors

    4.2. Description and elimination of errors TACHO - ERROR 01 During centrifugation the speedometer pulses are interrupted. The rotor slows down until it stops. After the rotor stops, there is a DC braking for 30 sec. An MR during slowing-down causes a DC braking for 3 min. After the DC braking, the ”open the lid”...
  • Page 16 IMBALANCE Imbalance on motor axle. The centrifuge slows down until the “open the lid” release occurs. Further cooling until NOMINAL temperature is reached. • Weight difference in rotor components. • Supporting lugs not lubricated. • False IMBALANCE MODE is set (see chapter "Imbalance Mode"). •...
  • Page 17 ROTORCODE 10 An invalid rotor code was read during startup. The centrifuge slows down until the ”open the lid” release occurs. Further cooling until NOMINAL temperature is reached. • Magnetic coding on rotor is defective. • Speedometer system is defective. •...
  • Page 18 N < MIN 13 Insufficient speed; the slippage of the motor is too great. The centrifuge regulation can adjust the speed by 5% max. (the limit of adjustment). The error is indicated if the ACTUAL speed is lower than the NOMINAL speed minus 5%.
  • Page 19 SER I/O - ERROR 33 CP is not receiving correct data from FC. The centrifuge slows down until the ”open the lid” release occurs. • CC to FC is defective. • CP or FC is defective. Perform an MR. SER I/O - ERROR 34 CP is not receiving correct data from FC.
  • Page 20 °C / * - ERROR 52 Overtemperature in centrifuge chamber. The centrifuge slows down until the ”open the lid” release occurs. • Sensor cable B1 is defective. • Loose contact in plug. • CP is defective. • CB is defective. Also see CB-X3 (PIN 1 and PIN 2) and CP-X101 (PIN 4).
  • Page 21 General Notice for FU / CCI - ERROR 61 to FU / CCI - ERROR 69 • FC switches independently. • The rotor freewheels, coasting. • No further user operation is possible. • Cooling continues until nominal value is attained. •...
  • Page 22 FU / CCI - ERROR 67 Only centrifuges with 115 V. Overtemperature in the motor. The cable “overtemperature” in the motor has high impedance. • Overtemperature switch opens because of overtemperature in the motor • CC is defective. • FC is defective. •...

  • Page 23: Factory Setting

    Factory setting 5.1. Control panel (Only in a cooled Display field Control field centrifuge) >RCF< t / min:s PROG T / °C T / °C T / °C T / °C IMPULS START STOP PROG Entry field The EPROM of the CP must, in all circumstances, correspond to the machine version and the cooling version.

  • Page 24: Imbalance Mode

    • Press → Display: *** OK *** and then: PARAM - INIT C001 ↑ ↑ machine version  Number of initialisations • Mains switch is OFF • Remove both jumpers from slot 3 and slot 4 on coding strip X3 on the CP. Put a jumper on slot zero at the plug on coding strip X3 on the CP.

  • Page 25: Offset Value

    5.4.1. OFFSET value The OFFSET value is the difference between the actual temperature and the sensor temperature. Example: Actual temperature - Sensor temperature = OFFSET value 25.5 °C 27.0 °C -1.5 °C 5.4.2. Procedure for performing an OFFSET alignment → 1.

  • Page 26: Function Retrievals / Settings

    Function retrievals / settings Requirements: 1. Rotor is stopped. 2. Mains switch is ON Keep key pressed down until (after about 8 sec.) the following appears in the dis- play: 1. SOUND / BELL ON1 or OFF (acoustic signal) Press key.

  • Page 27: Slippage Of The Drive

    6.3. Slippage of the drive Requirement: The centrifuge is running at its rated speed. Permissible slippage: < 5% of the rated speed. Keep the key pressed down until (after about 8 sec.) the following appears in the display: ∧ X X X X X X X X ...

  • Page 28: Functional Check

    In the final check, the functional efficiency of each centrifuge is verified, with the meas- ured values and ranges of measured values being taken into account. Table 7 Measurements carried out on the centrifuges at the factory MIKRO 22 MIKRO 22 R with testing rotor 1153 load: two reaction receptacles 1.5 ml...
  • Page 29 Temperature measured at room temperature RT ≤26 °C Sample temperature after 1 h running time RT + 17 K Sample temperature in cooled centrifuges after 1 h running time 4°C 14000 RPM +2 °C to +6 °C 20°C +18 °C – 22 °C 37°C +35 °C–...

  • Page 30: Functional Test

    Assembling and disassembling components Before assembling or disassembling components, the working processes in Table 9-B for MIKRO 22 and MIKRO 22 R must first be carried out to reach the components and make a note of the plug numbers. The components are assembled in reverse order ! The further procedure is described on the following pages.
  • Page 31 In Table 9-A the components are ordered in the following sequence: Column 1: Abbreviation Column 2: Components Column 3: Abbreviations in the circuit diagrams Column 4: Plug connections Column 5: Connections at the electronic-panels Column 6: Described in capture. Table 9-A A Speed sensor (speedometer) B Motor S101...
  • Page 32 Table 9-B Working processes A B C D E F G H I J K L M N O P Q R S T U V W X Y 1. Open lid X X X X X X 2. Set mains switch X X X X X X X X X X X X X X X X X X X X X X X to OFF...

  • Page 33: Speed Sensor B3 (Speedometer)

    • Unscrew the four screws, and take SB out of centrifuge. • Replace SB 9.5. CB A3 (cooling board) only MIKRO 22 R • All plugs on the CB must be pulled out. • Unplug the two cables (RD and BK) at the SB.

  • Page 34: Cp (Control Panel) A4

    9.6. CP (control panel) A4 • Detach the two holding frames at the CP. • Lift out the CP on the opening at the front screen. • Replace the CP. 9.7. EPROM at CP • Pull the EPROM carefully out of IC-socket. •...

  • Page 35: Short The Mains Choke Coil

    9.12.2. Short the mains choke coil In countries, in which the European standard EN 61000-3-2 applies it is not allowed to short the mains choke coil. The mains choke coil reduces the mains input current below the limit values stated in the above mentioned European standard. If the centrifuge is run with undervoltage, that is mains frequency 50 Hz with a voltage <...

  • Page 36: Appliance Plug B4, Overvoltage Protection F1

    9.14. Appliance plug B4, overvoltage protection F1 • Remove mains switch, see chapter 9.13. • Unscrew the two fastening screws at the appliance plug. • Pull the appliance plug out of the opening. • Remove the overvoltage protection from the appliance plug. •...

  • Page 37: Lid Spring

    9.20. Lid spring • Open the lid. • Loosen the fastening screws at the inner side of the lid. • Pull up the external lid part out of the guideway. • Replace defective component. 9.21. Hinge block • Remove upper housing part with lid (4 screws). •...

  • Page 38: Speedometer-Code-Position Of The Rotors

    Speedometer-code-position of the rotors MIKRO 22 / 22 R Speedo- Position Rotor meter- occupied code-No. 1001 0000 1111 SK 57.98-1 1001 0001 0111 1015, 1016 1001 0001 1011 1158 1001 0001 1101 1151 1001 0001 1110 1159, 1195 1001 0100 0111...
  • Page 39 Used cable colours and their short codes: colour short code black brown orange yellow blue violet green grey white pink gold silver green-yellow GNYE 39/51...

  • Page 40: Circuit Diagrams

    Circuit diagrams 11.1. Mains supply with supply board (SB) 230 V Gerätestecker Überspannungsschutz appliance plug overvoltage protection Netz/mains GNYE 230V/50Hz zum Übertemperatur- Funkentstörfilter Zur Kühlungsplatine A3 / X1 schalter F3 radio interference to cooling board A3 / X1 to overtemperature suppression filter switch F3 Netzschalter...

  • Page 41: Mains Supply With Supply Board (Sb) 115 V

    11.2. Mains supply with supply board (SB) 115 V Gerätestecker Überspannungsschutz appliance plug overvoltage protection Netz/mains GNYE 115V/60Hz Zur Kühlungsplatine A3 / X1 zum Übertemperatur- Funkentstörfilter to cooling board A3 / X1 schalter F3 radio interference to overtemperature suppression filter switch F3 Netzschalter mains switch...

  • Page 42: Circuit Diagram Supply Board (Sb)

    11.3. Circuit diagram supply board (SB) FC-Fehler Fehlermeldung von FC FC-ERROR error message from FC (-)485-Bus listen/talk (+)485-Bus Hardware-stop Hardware-stop Tacho Verschlußrelais lid lock relay Deckel offen-Meldung lid open-message Unwucht GND imbalance GND Unwucht imbalance Tacho Netz mains Stillstand Zur Kühlplatine 115V Version standstill to cooling board...

  • Page 43: Connecting Diagram And Component Layout Supply Board (Sb)

    11.4. Connecting diagram and component layout supply board (SB) zum F requenzum richter A2 / S501 zur Kühlungsplatine to frequency converter A 2 / S501 to cooling board zum Steuerteil A4 / X1 to control panel A4 / X1 Diagramm Pin 12 Unwuchtschalter Im balance switch...

  • Page 44: Signals At Control Cable (Between Cp-Sb)

    11.5. Signals at control cable (between CP-SB) X1 Pin 4 X1 Pin 5 X1 Pin 3 FC Hardware Stop Deckel offen Deckel offen lid open lid open Deckel zu Deckel zu lid closed lid closed Verschluß offen Verschlußmagnet oder Lauf aktiviert lid locking open lid locking magnet...
  • Page 45 11.6. Block diagram control panel (CP) U (5.00V) r e f Reset Verschluss / lid locking FC Stop Deckel offen / lid open µP empfangen / senden listen / talk Unwucht / imbalance FC - ERROR Tacho in & & Temp.-fühler X101 temp.

  • Page 46: Block Diagram Control Panel (Cp)

    11.7. Connecting diagram Control board (CP) Steuerteil A4 control panel A4 X101 A4/X101 A4/X1 A3/X4 A1/X2 zur Kühlungspaltine zur Versorgungsplatine nur gekühlte Version to supply board to cooling board only refigerated Version 46/51...

  • Page 47: Block Diagram And Signals At Frequency Converter (Fc)

    11.8. Block diagram and signals at frequency converter (FC) Signale an S501: signals at S501: Netzdrossel L1 mains choke coil L1 Pin 5 = B Pin 3 = A Übertemperaturschalter F3 für R1 overtemperature switch F3 for R1 Pin 4 Pin 7 Pin 8 FC Hardware Stop...

  • Page 48: Connecting Diagram Frequency Converter (Fc)

    R1 Netzdrossel L1 Motor / motor (nur bei 230 V Ausführung; MIKRO 22 ab Werk Nr. XXXX-06-00, MIKRO 22R ab Werk Nr. XXXX-07-00 mains choke coil L1 (only with 230 V model; MIKRO 22 from serial no. XXXX-06-00, MIKRO 22R from serial no.

  • Page 49: Circuit Diagram Cooling Board

    11.10. Circuit diagram cooling board Motorschutzschalter motor protective switch zum Steuerteil A4 / X101 to control panel A4 / X101 9 10 BC327 VDR1 1N4148 YE (GY) GN (YE) BN (GN) WH (BN) 49/51...

  • Page 50: Connecting Diagram And Component Layout Cooling Board

    11.11. Connecting diagram and component layout cooling board Anlaufkondensator startup condenser VDR1 A3 / X4 Temperaturfühler und Über- temperaturschalter im Kessel temperature sensor and overtemperature switch in centrifuge chamber A4 / X101 zum Steuerteil A4 to control panel A4 zur Versorgungsplatine A1 to supply board A1 50/51...

  • Page 51: Technical Specifications

    Technical specifications Manufacturer Hettich Zentrifugen D-78532 Tuttlingen Model MIKRO 22 MIKRO 22 R Product No. 1105 1105-01 1110 1110-01 Mains voltage (± 10%) 220-240 V 1∼ 110-127 V 1∼ 220-240 V 1∼ 110-127 V 1∼ Mains frequency 50-60 Hz 50-60 Hz 50–60 Hz...

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Mikro 22 r

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