Repair instructions
MIKRO 22 / 22 R
© 02.04 AR025GB
Phone: (07461) 705-0 • Fax: (07461) 705-125 • Internet: www.hettichlab.com • e-mail: info@hettichlab.com, service@hettichlab.com
Andreas Hettich GmbH & Co. KG • Gartenstraße 100 • D-78532 Tuttlingen • Germany
TABLE OF CONTENTS
1. INTRODUCTION...................................................................................................... 6
2. 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. Special features ............................................................................................... 9
2.6. Motor / Tacho system ...................................................................................... 9
2.7. Imbalance switch ........................................................................................... 10
2.8. Interlocking .................................................................................................... 10
2.9. Cooling........................................................................................................... 10
2.9.1. Temperature sensor B1 in the centrifuge chamber ................................. 10
2.9.2. Function of the cooling board (CB) A3 .................................................... 10
2.10. Fan................................................................................................................. 10
2.11. Offset calibration............................................................................................ 11
2.12. Protection....................................................................................................... 11
3. REQUIREMENTS FOR ERROR IDENTIFICATION .............................................. 12
3.1. Correct power supply..................................................................................... 12
3.2. Functional check............................................................................................ 12
3.3. Procedure for diagnosing errors .................................................................... 12
4. ERROR MESSAGES ............................................................................................. 13
4.1. Brief description ............................................................................................. 13
4.2. Description and elimination of errors.............................................................. 15
5. FACTORY SETTING ............................................................................................. 23
5.1. Control panel ................................................................................................. 23
5.2. Procedure for initialisation.............................................................................. 23
5.3. Imbalance Mode ............................................................................................ 24
5.4. OFFSET alignment ........................................................................................ 24
5.4.1. OFFSET value ........................................................................................ 25
5.4.2. Procedure for performing an OFFSET alignment.................................... 25
5.4.3. Note for temperature sensor in centrifuge chamber................................ 25
2/51
6. FUNCTION RETRIEVALS / SETTINGS................................................................. 26
6.1. Acoustic signal ............................................................................................... 26
6.2. Hours of operation.......................................................................................... 26
6.3. Slippage of the drive ...................................................................................... 27
6.4. Setting display contrast on control panel........................................................ 27
7. FUNCTIONAL CHECK........................................................................................... 28
7.1. Functional check at factory............................................................................. 28
8. FUNCTIONAL TEST .............................................................................................. 30
8.1. Checking the proper working order ................................................................ 30
8.2. Proper working order after repairs.................................................................. 30
9. ASSEMBLING AND DISASSEMBLING COMPONENTS...................................... 30
9.1. Speed sensor B3 (speedometer) ...................................................................33
9.2. 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. CC (control cables) ........................................................................................ 34
9.9. LL (Y1) (lid locking) ........................................................................................ 34
9.10. BR R1 (brake resistor) ................................................................................... 34
9.11. Radio interference suppression filter Z1......................................................... 34
9.12. Mains choke coil (L1) .....................................................................................34
9.12.1. Assembly and disassembly ..................................................................... 34
9.12.2. Short the mains choke coil ......................................................................35
9.13. Mains switch Q1............................................................................................. 35
9.14. Appliance plug B4, overvoltage protection F1 ................................................ 36
9.15. Imbalance switch S1 ......................................................................................36
9.16. Temperature sensor B1 in centrifuge chamber .............................................. 36
9.17. Temperature sensor B2 at condenser............................................................36
9.18. Fan M3........................................................................................................... 36
9.19. Compressor M2.............................................................................................. 36
9.20. Lid spring........................................................................................................ 37
9.21. Hinge block .................................................................................................... 37
3/51
10. SPEEDOMETER-CODE-POSITION OF THE ROTORS .................................... 38
11. 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. Signals at control cable (between CP-SB) ..................................................... 45
11.6. Block diagram control panel (CP) .................................................................. 46
11.7. Connecting diagram Control board (CP)........................................................ 47
11.8. Block diagram and signals at frequency converter (FC) ................................ 48
11.9. Connecting diagram frequency converter (FC) .............................................. 51
11.10. Circuit diagram cooling board..................................................................... 52
11.11. Connecting diagram and component layout cooling board......................... 54
12. TECHNICAL SPECIFICATIONS ........................................................................ 57
4/51
Abbreviations
CP Control panel
FC Frequency converter
SB Supply board
CB Cooling board
CC Control cable
LL Lid locking
BC Braking chopper
BR Brake resistor
MR Mains reset
EC Error cause
ES Error consequence
ER Error remedy
ECR Error-code reset
Mains switch OFF - ON
M Measurement
5/51
1. 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.
• The aim of these repair instructions is to enable any errors to be located and
eliminated quickly.
There should be no interventions at, or replacement of components on the
individual electronics boards. Experience shows that if an intervention is not
performed in accordance with regulations, or if a component is installed
whose specification is not identical to that of the original component, then the
error (defect) which has occurred will be compounded by further damage. In
such an event any guarantee claim or liability claim against the HETTICH
ceases to exist.
Any electronics boards which are not repaired in accordance with the
regulations cannot be acknowledged as being replacement spare parts.
• Information about the operation of the centrifuge please see operating instructions.
• We reserve all rights for these technical documents.
• Technical alterations reserved.
6/51
2. 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
• Motor with speed sensor (speedometer)
• Braking chopper (BC) with brake resistor (BR)
• Lid locking (LL)
• Cooling board (CB), only Mikro 22 R
2.2. Control panel (CP)
The CP is the ”brain” or ”master” of the centrifuge.
Via a serial data bus system, the MASTER controls its SLAVE, the component:
− frequency converter (FC)
The individual tasks of the CP are:
• Management of operator inputs and control of LCD display
• Storage of 3 run programs
• Control of components:
− FC via the enabling circuit and via the serial interface
− cooling and fan
• Evaluation of the speed sensor (speedometer)
• Evaluation of the imbalance switch.
• Evaluation of the FC fault alarm circuit
• Evaluation of the LL open/closed signalling circuit
• Control of the relay for the LL solenoid at rotor standstill
• Temperature measurement and sensor evaluation of the temperature sensor in
centrifuge chamber (only refrigerated centrifuge).
• Routine for input, storage and transfer of temperature offset values
• Format of the serial interface:
5 Volt interface with 3 conductors
(16-pole control cable, pole 6, 8 and 11)
• The CP is powered from the SB via the control cable:
+ 10...15 Volt pole 1,2
GND pole 15,16
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
7/51
2.3. Supply board (SB) A1
The SB performs the following individual functions:
• 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).
• Power supply for speed sensor (speedometer).
• Plugging station X4 for speed sensor cable and transmission to the CP and FC.
• Control of the relay for the LL solenoid at rotor standstill
• Plugging station X3 for the imbalance switch and direct transmission of the imbalance
signal to the CP.
• The 5 Volt interface with 3 conductors is converted to an RS 485 interface with 2
conductors:
Interface to FC: RS 485-interface via 2 conductors -
• Transfer of primary enabling (=Hardware STOP) CP ⇒ FC
• Transfer of fault circuit (=FC-ERROR) FC ⇒ CP
2.4. Frequency converter (FC) A2
The FC performs the following individual functions:
• Generation of the motor power supply
(3-phase AC current of variable frequency and voltage)
Mode of operation: The mains supply is rectified, smoothed and chopped in three
bridge elements to give a pulse-duration modulated supply.
• Monitoring of the motor current
• Evaluation of the overtemperature switch in the motor (only version 115V, AC)
• Slave behaviour (handling of interrogations and commands from the CP via the serial
interface):
RS 485-interface with 2 conductors
(10-pole control cable, pole 3 and 5)
• Evaluation of the primary enabling (=Hardware STOP) for the FC
(10-pole control cable, pole 7)
• Evaluation of potential faults and monitoring of the fault circuit (=FC-Error)
(10-pole control cable, pole 4)
• The electrical power, which resulted from braking, will be conducted to the BR. The
braking chopper switches at a voltage:
- from approximately 390V (230V series)
- from approximately 200V (115V series)
• The BR is protected by an overtemperature switch. At a short circuit on the BC,
which is located on the FC, the BR overheats because of high current. The
overtemperature switch cuts off the voltage supply from the FC. After cooling down at
the BR the voltage supply is switched on again.
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
8/51
• 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
fault circuit (FC-ERROR). The CP then interrogates the type of fault via the serial
interface.
2.5. Special features
• Multiprocessor concept:
Although one microprocessor will fail, the other one will continue to monitor its
assigned area.
If the CP fails, the drive will be shut down automatically by the FC when no interrogations have been received via the interface for more than 30 seconds.
• Interface concept:
Transmission of data is monitored by an extra check sum.
• Hardware concept:
All switches with a safety relevant function are of the NC-contact type, which
means that loose contacts and open-circuit faults can also be detected.
2.6. Motor / Tacho system
• The motor is a 3 phase asynchronous motor with 2 pairs of poles.
• A speed sensor (speedometer) attached to the motor receives the following from the
transmitter attached to the rotor,
− rotor code information (see section 10) and
− speed data (6 pulses per revolution)
• The ACTUAL speed is monitored and controlled via the CP
− Double safety:
The FC is also programmed that no value of speed
in excess of the maximum permitted rotor speed
can be selected. The FC monitors the speed and
switches off at excess speed with error code
“ERROR 84”.
• Rotor standstill is monitored via the CP.
− The lid can only be opened when the CP has detected standstill.
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
9/51
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. This occurs when the rotor is at standstill and
mains power is applied. A solenoid is energized and releases the latch.
• The centrifuge can only be started when the lid is closed. A microswitch on the LL
detects the position of the LL.
2.9. Cooling
• Temperature behaviour:
− When rotor is at standstill and the lid is locked, the cooling is operating.
− When rotor is at standstill and the lid is unlocked, there is no cooling.
2.9.1. Temperature sensor B1 in the centrifuge chamber
• This temperature is processed in the CP.
• The housing of the temperature sensor B1 also contains an overtemperature switch.
In refrigerated centrifuges this switch cuts off the drive at > 60°C.
2.9.2. Function of the cooling board (CB) A3
• Plugging station (X3) for the temperature sensor and the overtemperature switch in
the centrifuge chamber.
• The voltage of the temperature sensor in the centrifuge chamber plug X4 being
transmitted over a 10-pole CC to the CP plug X101.
• The signal of the overtemperature switch in the centrifuge chamber plug X4 being
onward transmitted over a 10-pole CC to the CP plug X101.
• Plugging station (X2) for the overheating protection B2 at the condenser.
• Relay circuit for the compressor and the fan. The overheating protection B2 at the
condenser is series connected to the relay voltage.
• Plugging station (X1) for the compressor and the fan.
2.10. Fan
• The fan cools down the refrigerant flowing through the condenser.
• The fan is parallel-connected to the compressor.
10/51
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
2.11. Offset calibration
• Offset calibration is performed in order to equalize the tolerances of the temperature
sensor and the electronics.
Perform Offset calibration
when replacing:
− the temperature sensor
− the CP
− the CP-EPROM
2.12. Protection
Mains power input
Mains switch
FC
Motor
Cooling
Where/How
calibrate the temperature sensor.
calibrate temperature sensor and read out the
old offset values and put them in the new CP.
Read out the old offset values and put them in the
new CP.
⇒
⇒
⇒
⇒
Mains input with overvoltage protection.
Thermal overload protection (fuse).
Electronic protection.
Overtemperature cutout > 135°C (only 115V
version).
⇒
Overtemperature switch in centrifuge chamber and
at condenser.
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
11/51
3. 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
• Supply board A1 (SB), plug X5, (PIN 1 and PIN 5)
3.2. Functional check
• Mains switch is ON.
• All LED`s on control panel must light up.
• The centrifuge type and the software version number appears in the display.
• After about 8 sec. the display switches over to
− the most recently used centrifuging data or
− the error code.
3.3. Procedure for diagnosing errors
• Look for the displayed error code in the chapter 4 "Error messages".
• Remedy the error according to the instructions.
• Carry out a functional check after every repair and whenever a component is
replaced.
• The technical data which were determined during the final check can be found in the
chapter 7 "Functional check".
12/51
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
4. Error messages
4.1. Brief description
• Error messages in:
MIKRO 22
MIKRO 22 R
Error designation No. Brief description Page
TACHO-ERROR 01 Speedometer pulses break down during rotation 15
TACHO-ERROR 02 No speedometer pulses after start command 15
IMBALANCE Imbalance on motor axle 16
CONTROL-ERROR 04 LL error, lid opened without recognizing that
16
motor had stopped
N > MAX 05 Excessive speed error, 250 RPM above n-max of
16
rotor
ROTORCODE 10 Invalid rotor code 17
MAINS INTERRUPT Mains interruption 17
VERSION-ERROR 12 Error in initialisation 17
N < MIN 13 Speed error, slippage is too great 18
CONTROL-ERROR 21 CP - error: speed 18
CONTROL-ERROR 22 CP - error: I²C bus 18
CONTROL-ERROR 23 CP - error: display memory 18
CONTROL-ERROR 24 CP - error: clock timeout 18
CONTROL-ERROR 25 CP - error: EEPROM 18
CONTROL-ERROR 26 CP - error: driver defective 18
N > ROTOR-MAX --- CP - error: nominal speed is higher
than permitted rotor speed
18
or nominal RCF is higher
than permitted rotor RCF
SER I/O-ERROR 30 No connection between CP and serial interface 18
SER I/O-ERROR 31 No connection between FC and serial interface 18
SER I/O-ERROR 33 Subassembly data incorrectly transmitted 19
SER I/O-ERROR 34 Data incorrectly transmitted between CP and FC 19
SER I/O-ERROR 36 No acknowledgement (NAK) from FC to CP 19
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
13/51
Error designation No. Brief description Page
No cooling
Overtemperature at condenser 19
(No error displayed)
°C / *-ERROR
52 Overtemperature in centrifuge chamber 20
°C / *-ERROR 53 Temperature sensor in centrifuge chamber is
defective
FU/CCI-ERROR 60 Faulty release signal to FC 20
FU/CCI-ERROR 61 FC - error: computing section 21
FU/CCI-ERROR 62 FC - error: undervoltage 21
FU/CCI-ERROR 63 FC - error: overcurrent 21
FU/CCI-ERROR 64 FC - error: overvoltage 21
FU/CCI-ERROR 67 FC - error: overtemperature in motor
(only 115V)
FU/CCI-ERROR 68 FC - error: overtemperature in FC 22
FU/CCI-ERROR 69 FC - error: EEPROM 22
FU/CCI-ERROR 84 FC - error: FC recognizes excess speed 22
FU/CCI-ERROR 85 FC - error: “Watchdog”in FC had
Triggered
20
22
22
14/51
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
4.2. Description and elimination of errors
TACHO - ERROR 01
EC During centrifugation the speedometer pulses are interrupted.
ES 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” release takes place.
Further cooling to NOMINAL temperature.
ER
• Speed sensor (speedometer) defective or loose contact on plug.
Measure speedometer pulses on plug X4 / SB, (pin 4 - pin 2).
• CC to CP, or CC to FC is defective.
• SB or CP or FC is defective.
M Also see at SB-X4, CP-X1 (PIN 14 and FC-S501 (PIN 8).
ECR Open the lid. Turn the rotor by hand and perform an MR while the
rotor is turning.
TACHO - ERROR 02
EC There are no speedometer pulses on the CP after startup.
ES 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” release takes place.
Further cooling to NOMINAL temperature.
ER
• Startup took place without the rotor.
• Motor not connected.
• Motor is defective.
• Speed sensor (speedometer) defective, or loose contact on plug.
Measure speedometer pulses on plug X4 / SB, (pin 4 - pin 2).
• CC to CP, or CC to FC is defective.
• No release signal to FC.
• SB or CP or FC is defective.
M Also see at SB-X4, CP-X1 (PIN 14 and FC-S501 PIN 8).
ECR Open the lid. Turn the rotor by hand and perform an MR while the
rotor is turning.
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
15/51
IMBALANCE
EC Imbalance on motor axle.
ES The centrifuge slows down until the “open the lid” release occurs.
Further cooling until NOMINAL temperature is reached.
ER
• Weight difference in rotor components.
• Supporting lugs not lubricated.
• False IMBALANCE MODE is set (see chapter "Imbalance Mode").
• Imbalance switch not connected.
• Imbalance switch is defective.
• Loose contact in cable or plug.
• CC to CP is defective.
• CP or SB is defective.
M Also see at SB-X3 and CP-X1 (PIN 12)
ECR Perform an MR.
CONTROL - ERROR 04
EC LL is open during centrifugation.
ES Slowing down until the ”open the lid” release occurs.
Further cooling until NOMINAL temperature is reached.
ER
• LL is defective and can be opened during centrifugation.
• Loose contact in cable or in plug.
• CC to CP is defective.
• CP or SB is defective.
M Also see at SB-X5 (PIN 2 and PIN 6) and CP-X1 (PIN 5).
ECR Perform an MR.
N > MAX 05
EC Excess speed. The speed recognized by the speed sensor
ES The centrifuge slows down until the ”open the lid” release occurs.
ER
ECR Perform an MR.
(speedometer) is 250 RPM greater than the n-max speed of the rotor.
Further cooling until NOMINAL temperature is reached.
• Insulation of speed sensor (speedometer) cable is defective.
• Loose contact on speed sensor (speedometer) cable.
• Speed sensor (speedometer) is defective.
• CC to CP is defective.
• CP or FC or SB is defective.
16/51
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
ROTORCODE 10
EC An invalid rotor code was read during startup.
ES The centrifuge slows down until the ”open the lid” release occurs.
Further cooling until NOMINAL temperature is reached.
ER
• Magnetic coding on rotor is defective.
• Speedometer system is defective.
• Loose contact on speed sensor (speedometer) plug
• The rotation of the rotor (direction) is incorrect.
M See at section 10.
ECR Open the lid or perform an MR.
MAINS INTERRUPT
EC Interruption of mains supply during centrifugation.
ES The centrifuge slows down until the ”open the lid” release occurs.
ER
• Power supply has failed.
• Loose contact in electrical connections.
• CC to CP is defective.
ECR Open the lid and press the
− Switching on at the mains during centrifugation causes
slowing-down until the ”open the lid” release occurs.
− Switching on at the mains when the rotor has stopped brings
about the ”open the lid” release.
.
key.
This error cannot
VERSION - ERROR 12
EC Differences in the initialisation from CP (EPROM) or FC.
ES No further user operation is possible.
ER
• An incorrect EPROM has been plugged into CP.
M Also see initialisation section 5.2.
ECR Perform an MR.
be reset by an MR
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
17/51
N < MIN 13
EC Insufficient speed; the slippage of the motor is too great.
ES The centrifuge slows down until the ”open the lid” release occurs.
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%.
Further cooling until NOMINAL temperature is reached
ER
• Motor is labouring (damage to bearings).
• Motor has a short-circuited coil (coil is defective).
• Loose contact in the electrical connections.
• FC is defective.
Release signal to FC was interrupted during centrifugation.
ECR Open the LL.
Perform an MR.
CONTROL - ERROR 21 - 26
EC Internal error in CP.
ES The centrifuge slows down until the ”open the lid” release occurs.
ER
• CP is defective.
ECR Perform an MR.
N > ROTOR-MAX
EC Error in the entered program
ES Further operation is not possible.
ER SET speed or SET RCF is higher than the permissible rotor speed or
permissible rotor RCF.
ECR Carry out a MAINS RESET or open the lid.
Reduce the speed or RCF in the entered program to the permissible
rotor speed or permissible rotor RCF.
SER I/O - ERROR 30 and ERROR 31
EC CP has no connection to the component FC via serial interface.
ES The centrifuge slows down until the ”open the lid” release occurs.
ER
• CC to FC is defective.
• There is no voltage on FC.
• F2 overtemperature switch on brake resistor has opened or is not
connected.
• CP or FC is defective.
• Cable on plug S102 is not or wrong plugged
ECR Perform an MR.
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
18/51
SER I/O - ERROR 33
EC CP is not receiving correct data from FC.
ES The centrifuge slows down until the ”open the lid” release occurs.
ER
• CC to FC is defective.
• CP or FC is defective.
ECR Perform an MR.
SER I/O - ERROR 34
EC CP is not receiving correct data from FC.
ES The centrifuge slows down until the ”open the lid” release occurs.
Further cooling until NOMINAL temperature is reached.
ER
• CC to FC is defective.
• CP or FC is defective.
ECR Perform an MR.
SER I/O - ERROR 36
EC FC sends signal NAK to the CP after receiving an unknown command.
NAK (not acknowledged).
ES The centrifuge slows down until the ”open the lid” release occurs.
Further cooling until NOMINAL temperature is reached.
ER
• CC to FC is defective.
• FC is defective.
• CP is defective.
ECR Perform an MR.
NO COOLING
EC No cooling in centrifuge chamber. Overtemperature at condenser,
ES Cooling switches off. Continuance of centrifugation until temperature
ER
M Also see at CB-X2.
ECR Perform an MR.
temperature > 60°C.
switch in the centrifuge chamber triggers and “ERROR 52” appears.
The centrifuge slows down until the “open the lid” release occurs.
• Condenser soiled.
• Loose contact in plug.
• SB is defective.
• Fan is defective.
• Sensor cable B2 is defective.
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
19/51
°C / * - ERROR 52
EC Overtemperature in centrifuge chamber.
ES The centrifuge slows down until the ”open the lid” release occurs.
ER
• Sensor cable B1 is defective.
• Loose contact in plug.
• CP is defective.
• CB is defective.
M Also see CB-X3 (PIN 1 and PIN 2) and CP-X101 (PIN 4).
ECR Perform an MR.
°C / * - ERROR 53
EC Temperature sensor in centrifuge chamber has a short circuit or a dis-
continuity.
ES The centrifuge slows down until the ”open the lid” release occurs.
Cooling switches off.
ER
• Temperature sensor is defective.
• Sensor cable B1 is defective.
• Loose contact in plug.
• CP is defective.
• CB is defective.
M Also see at CB X3 (PIN 5 and PIN 4) and CP-X101 (PIN 8).
ECR Perform an MR.
FU / CCI - ERROR 60
EC The release signal was not correctly transmitted to FC.
The evaluation of the release signal only occurs once after MR.
ES No further user operation is possible.
ER
• CC to FC is defective.
• CC to CP is defective.
• SB is defective.
M Also see at CP-X1 (PIN 4) and FC-S501 (PIN 7).
20/51
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
General Notice for FU / CCI - ERROR 61 to FU / CCI - ERROR 69
ES
• FC switches independently.
• The rotor freewheels, coasting.
• No further user operation is possible.
• Cooling continues until nominal value is attained.
ECR
• Mains switch is OFF.
• Switch mains switch to ON after 1 min.
M Also see at FC-S501 (PIN 4) and CP-X1 (PIN 13).
FU / CCI - ERROR 61
EC Error in computing section.
ER
• CC is defective.
• FC is defective.
FU / CCI - ERROR 62
EC Undervoltage. Mains voltage less than 20% as nominal voltage.
ER
• Supply voltage too low, see chapter "Short the mains choke coil".
• CC is defective.
• FC is defective.
M Also see at FC, U
FU / CCI - ERROR 63
EC Overcurrent.
ER
• Short circuit in motor.
• Motor impedance is too low.
• CC is defective.
• FC is defective.
FU / CCI - ERROR 64
DC.
EC Voltage in intermediate circuit:
> 410 V DC at 230 V
> 205 V DC at 115 V
This error normally only occurs when the drive is being braked.
ER
• BR is defective.
• CC is defective.
• FC is defective.
M Also see FC, UDC.
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
21/51
FU / CCI - ERROR 67
EC Only centrifuges with 115 V.
Overtemperature in the motor. The cable “overtemperature” in the
motor has high impedance.
ER
• Overtemperature switch opens because of overtemperature in the
motor
• CC is defective.
• FC is defective.
• Motor is defective
M
• Also see at FC S2.
FU / CCI - ERROR 68
EC Overtemperature in FC.
ER
• Insufficient heat abduction from FC to centrifuge housing. There is
no, or not enough, heat-conducting paste between FC and housing.
• Full-load operation and an ambient temperature > 45°C.
• CC is defective.
• FC is defective.
FU / CCI - ERROR 69
EC EEPROM in FC is defective.
ER
• CC is defective.
• FC is defective
FU / CCI - ERROR 84
EC FC recognizes excess speed.
• During rotation the speedometer pulses (6 per revolution) are
controlled by the FC.
• The FC switches the centrifuge off, when the maximum speed is
exceeded more than 500 rpm.
ER
• CCis defective.
• FC is defective.
M Also see at SB-X4 and FC-S501 (PIN 8).
FU / CCI - ERROR 85
EC “Watchdog” in FC
Discrepancy in program procedure
ER
• CCis defective.
• FC is defective.
22/51
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
5. Factory setting
5.1. Control panel
(Only in a cooled
centrifuge)
T / °CT / °CT / °CPROG
T / °C
Display field
>RCF<
RPM
t / min:s
Entry field
The EPROM of the CP must, in all circumstances, correspond to the machine
version and the cooling version.
5.2. Procedure for initialisation
An initialization must be carried out:
• after replacing the FC.
Control field
IMPULS
PROG
START
STOP
RCF
.
The frequency converter must be adjusted to the centrifuge.
Requirement: 1. Rotor has stopped.
2. LL is open.
3. Mains switch is OFF.
4. Plug on coding strip X3 on the CP has a jumper in slot 3 and
in slot 4 (initialisation position).
• Mains switch is ON →
• Press
key
→
Display:
Display:
INIT - MODE
VERS 12 °C / * 01
↑ ↑
machine version
Cooling version (01 = with cooling, 00 = without cooling)
• Press the
key →
Display:
IMBALANCE MODE 2
• Press the or key to set IMBALANCE MODE 1 or IMBALANCE MODE 2. Now
press the
START
key to save this setting. Information about IMBALANCE MODE see
chapter "Imbalance Mode".
• Press key
→
Display:
PARAM - INIT 0000
↑ ↑
machine version
Number of initialisations
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
23/51
• Press
key →
.
Display:
and then:
*** OK ***
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.
(Service position, “Watchdog”)
An initialisation is always necessary
after a replacement of the FC.
5.3. Imbalance Mode
From programme version 3.00 it is necessary to set the imbalance mode during the
initialization.
Depending on the SB version IMBALANCE MODE 1 or IMBALANCE MODE 2 must be
selected.
If the incorrect imbalance mode is selected, the display shows
error "IMBALANCE" permanently !
5.4. OFFSET alignment
An OFFSET alignment is performed to align the temperature sensor and the CP electronics with one another. An alignment must be performed in any event:
− 1. Replacement of the temperature sensor at the centrifuge chamber.
− 2. Replacement of the CP or the EPROM at the CP.
The OFFSET alignment for the temperature sensor is carried out in the CP.
To carry out an offset compensation, measure the temperature directly on the
temperature sensor with a temperature measuring device. Then enter the measured
value in the display and save it.
Each correction must be confirmed by the
key.
.
Requirements: 1. Rotor has stopped.
2. LL is open.
3. Mains switch is OFF.
4. Plug on coding strip X3 at the CP the jumper from slot 0 to slot 3
(OFFSET position).
24/51
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
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. Mains switch is ON
2. Press
key
→
→
Display:
Display:
* OFFSET - MODE *
T1: 27,0 °C → 25,5 °C
↑ ↑
Sensor temperature
Actual temperature
• The sensor temperature measured is to be adjusted with the keys to
make it agree with the actual temperature.
3. Press the key
→
• If the temperature settings are not confirmed by pressing the
old settings will be maintained.
4. Mains switch is OFF.
5. Remove jumper from slot 3 on coding strip X3 on the CP.
Put the jumper on slot zero at the plug on coding strip X3 on the
CP (Service position, “Watchdog”).
5.4.3. Note for temperature sensor in centrifuge chamber
Display: *** OK ***
key, the
.
If the temperature in the sample deviates from the nominal value (Display), the offset
alignment can be altered as follows:
− Actual temperature is lower than nominal temperature:
Set the offset temperature of T1 lower by the amount of the deviation (the corrected value is lower).
− Actual temperature is higher than nominal temperature:
Set the offset temperature of T1 higher by the amount of the deviation.
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
25/51
6. 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 display:
1. SOUND / BELL ON1 or OFF (acoustic signal)
Press key. Every time the key is pressed, the display alters as follows:
2. CONTROL XXXXX h
3. VERS XX °C / * XX
4. FU / CCI - 1000
5. FU / CCI - S. 00.XX
Hours of operation
Machine version, cooling version
FC type
FC software
If nothing more is keyed in for 8 sec., the CP switches over to normal mode. Only Nos.
1. and 2. of the function retrievals listed here can be altered.
6.1. Acoustic signal
After in the display appears:
• SOUND / BELL ON1 or SOUND / BELL OFF
the acoustic signal can be deactivated or activated after standstill using the keys.
ON1
Every 30 sec. there is an acoustic acknowledgement that the rotor has
stopped. The acknowledgement can be silenced by pressing a key or
opening the lid.
OFF
The fact that the rotor has stopped is not acknowledged acoustically.
The setting of the acoustic signal must be confirmed by pressing the
key.
.
In the event of an error, the acoustic signal sounds every 2 sec. until a key is pressed or
the lid is opened.
6.2. Hours of operation
After the CONTROL XXXXX h appears, the hours of operation can be seen and, after
being selected by pressing the
RCF
key, can be altered using the keys.
The key sets the hours-of-operation indicator to 0.
The key increases the hours-of-operation display by 1.
To make the number of hours increase quickly, keep the key pressed down.
The setting of the hours of operation must be confirmed by pressing the
key.
.
26/51
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
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
________
↑
Actual speed in RPM
∧
Rotary frequency in RPM
X X X X
________
↑
When the key is pressed again, the CP switches to normal mode.
6.4. Setting display contrast on control panel
The display contrast has been preset at the factory, but can be readjusted.
Requirements: The control panel is at room temperature (20 ... 25°C).
The contrast must be adjusted so that the background pixels are not visible.
Adjustment:
Using a screwdriver, adjust the contrast on the trimming potentiometer on the rear side
of the control section (see diagram).
Rear side of control panel:
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
27/51
7. Functional check
7.1. Functional check at factory
Following accessories are required to perform the functional check:
• Testing rotor
• Two reaction receptacles filled with water
Table 7 lists measured values, and, ranges of measured values, which have been laid
down for these accessories.
In the final check, the functional efficiency of each centrifuge is verified, with the measured 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
reaction receptacles filled with Water
Measuring instruments used in final check
Temperature measuring instrument THERM 2250-1 X
Moving-iron current measuring instrument
Moving-coil current measuring instrument
Rated speed n
Slippage at n
Starting current up to n
RPM 14000
max
RPM 100 – 400
max
max
Rated current up to n
max
Total current with cooling
Starting time Stage 9 up to n
Rundown time Stage 9 from n
sec 9 – 13
max
sec 14 – 18
max
A 7.0 - 7.7
A
A 2.0 - 2.7
A
A
A
X
X
≤ 3.0
Starting time Stage 5 up to RPM 4000 sec 20 – 25
Rundown time Stage 5 from RPM 4000 sec 23 – 28
Imbalance Run through at g
Switch off at g
≤ 2
≥ 7
28/51
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
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
1st run 4°C 14000 RPM +2 °C to +6 °C
2nd run 20°C n
3rd run 37°C n
Machine temperatures
+18 °C – 22 °C
max
+35 °C– 39 °C
max
after 2nd run
Motor: Unscrew motor covering and meas-
RT + 70 K
ure at stator lamination bundle
A bearing: Measure ball bearing temperature at
RT + 70 K
inner ring
FC: Measure at FC fastening
RT + 20 K
brackets
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
29/51
8. Functional test
8.1. Checking the proper working order
By measuring and comparing the data listed under Table 7, it can be determined if a
centrifuge is in proper working order. A precondition for this is that the necessary
components stated under Table 7 are used for the measurements.
If the measurements are carried out using other components, the numerical values from
the ”Rotor and accessories” chapter of the operating instructions for the particular centrifuge must be employed.
If the measured values obtained for:
• the speed,
• the starting and rundown times
• the temperatures in cooled centrifuges,
are identical to the numerical values in Table 7, or to those in the ”Rotor and accessories” section of the operating instructions, then the centrifuge is in proper order.
8.2. Proper working order after repairs
See section headed ”Checking the proper working order”. The following values must be
checked in addition:
• Insulation resistance > 2 MΩ
• Protective conductor resistance < 0,2 Ω
• Leakage current
< 3,5 mA *
* limit according to EN 61010
A laboratory centrifuge do not belong to those medical appliances which may be tested
according to the regulation IEC 601 or corresponding national medical electronic
standards. Laboratory centrifuges are classified as laboratory equipment.
The regulations applying to laboratory equipment are IEC 1010 or European standard
EN 61010.
9. 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.
30/51
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
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
1 2 3 4 5 6
A Speed sensor (speedometer) B3 X4 A1 9.1
B Motor M1 S101 A2 9.2
C Vibration damper 9.2
D FC (frequency converter) A2 9.3
E EPROM (on FC) A2 9.3
F SB (supply board) A1 9.4
G CB (cooling board) A3 9.5
H CP (control panel) A4 9.6
I EPROM (on CP) A4 9.7
J Mains choke coil - 9.12
K CC (control cables) - 16 conductors A4-A1 9.8
- 10 conductors A1-A2
- 10 conductors A4-A3
L LL (lid locking) Y1 X5 A1 9.9
M BR (brake resistor) R1 P10-P1 A2 9.10
N Radio interference suppression filter Z1 X5-Q1 A1 9.11
O Mains switch ON / OFF Q1 Z1-F1 9.13
P Appliance plug B4 F1 9.14
Q Overvoltage protection F1 B4-Q1 9.14
R Imbalance switch S1 X3 A1 9.15
T Temperature sensor (centrifuge chamber) B1 X3 A3 9.16
U Temperature sensor (condenser) B2 X2 A3 9.17
V Fan (compressor) M3 X1 A3 9.18
W Compressor M2 X1 A3 9.19
X Lid spring 9.20
Y Hinge block 9.21
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
31/51
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 X X X X
2. Set mains switch
XX X X X XXXXXXXXXXXXXXX X X X
to OFF
3. Disconnect
XX X X X XXXXXXXXXXXXXXX X X X
centrifuge from
mains voltage
4. Disassemble rotor XX X X X
5. Remove motor
XX X X X
covering in
centrifuge
chamber
6. Take rubber
X X X X
sleeve under
motor covering out
7. Detach front
X X X X XXXXXXXXXXXXXXX X X X
screen
8. Pull of the control
X X X X XXXXXXXXXXXXXXX X X X
cable from the CP
9. Remove front
XX X X X XXXXXXXXXXXXXXX X X X
screen
10. Detach rear
X X X X X
covering
Example: Disassembling appliance plug
1. Definite the abbreviation of the appliance plug in Table 9-A, column 1.
Appliance plug = P
2. See Table 9-B column P and carry out the working processes in
numeric order.
3. Definite in Table 9-A the corresponding abbreviation, for the example
line P and pick out in column 6 the especially capture (9.13), where
the disassembly is described.
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
32/51
9.1. Speed sensor B3 (speedometer)
• Unscrew speed sensor (speedometer) from upper end plate of motor.
• Unplug plug number X4 from Supply board A1.
• Replace speed sensor (speedometer).
9.2. Motor M1 / Vibration damper
• Unscrew speed sensor (speedometer) from upper end plate of motor, and place it in
centrifuge chamber.
• Pull out the 3 cables from plug S101 at the FC (BU/BN/BR).
• Use a socket spanner to loosen and remove the three fastening nuts on lower end
plate of motor.
• Lift motor upwards out of centrifuge. Unplug the earth lead.
• Before motor is installed, the three vibration dampers must be checked for possible
wear or cracks, and if necessary replaced.
• Replace the motor.
• Care must be taken of the anti-twist device when the vibration dampers are being
installed.
9.3. FC (frequency converter)
• Pull all plugs out of FC.
• Unscrew the four fastening screws of FC.
• Unscrew the screws on the connecting clips and pull the cables out.
• Replace FC
• Before installation, it must be noted that there is a heat-conducting paste between FC
and centrifuge housing floor.
Heat conducting from FC to centrifuge housing floor must be ensured.
9.4. SB (supply board) A1
• All plugs on the SB must be pulled out.
• 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.
• Unscrew the four fastening screws at the CB.
• Replace the CB.
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
33/51
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.
• Pay attention to the polarity of the EPROM when installing.
• Do not bend the IC-pins.
Before touching the EPROM ensure that your own static electricity is
discharged.
• Replace the EPROM.
9.8. CC (control cables)
• Unplug the corresponding control cable from the boards.
• Replace the control cable.
9.9. LL (Y1) (lid locking)
• Remove the front panel.
• Unplug all cable from the lid lock.
• Loosen the to fastening screws on the to of the housing.
• Exchange the lid lock.
9.10. BR R1 (brake resistor)
• From below loosen the two fastening screws of the BR at the floor.
• Unplug the cables at the BR and the FC.
• Loosen cable at overtemperature switch on the BR (clip S102, position U1).
• Replace BR.
9.11. Radio interference suppression filter Z1
• Unscrew the fastening screws of the radio interference suppression filter.
• Remove the plugs from the radio interference suppression filter.
• Replace the radio interference suppression filter.
9.12. Mains choke coil (L1)
9.12.1. Assembly and disassembly
• Pull both plugs from the mains choke coil.
• Undo the fastening screws of the mains choke coil.
• Replace the mains choke coil.
34/51
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
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
< 205 V or mains frequency 60 Hz with a voltage < 210 V the voltage drop of the mains
choke coil can cause the error FU / CCI - ERROR 62.
The short of the mains choke coil will increase the supply voltage of the frequency
converter.
• Pull both plugs (A) and remove the cable, see Figure 1.
• Pull the plug (B) from the mains choke coil (see Figure 1) and plug it onto the free
connector from the radio interference suppression filter (C), see Figure 2.
B
A
Figure 1 Figure 2
9.13. Mains switch Q1
• Press mains switch out of lower part of housing.
• Remove all plugs at mains switch.
• Replace mains switch.
C
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
35/51
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.
• Replace appliance plug.
• Unplug the cables at the overvoltage protection.
• Replace overvoltage protection.
9.15. Imbalance switch S1
• Remove plug from position X3 at the SB.
• From below loosen the two fastening screws of the imbalance switch.
• Loosen the fastening nuts from the motor. Lift up the motor and pick up the
imbalance switch through the opening at the centrifuge chamber.
• Replace imbalance switch.
9.16. Temperature sensor B1 in centrifuge chamber
• Remove plug from position X3 at the CB.
• Remove the lock with appropiate tools at the front of the plug. Then press out the
four bushes.
• Press out the temperature sensor in the centrifuge chamber.
• Replace temperature sensor.
9.17. Temperature sensor B2 at condenser
• Remove upper housing part with lid (four screws).
• Lift up the upper housing part and the lid.
• Unscrew temperature sensor at the mounting (one screw).
• Unplug plug from position X2 at the CB.
• Replace temperature sensor.
9.18. Fan M3
• Remove upper housing part with lid (4 screws).
• Lift up the upper housing part and the lid.
• Detach fan.
• Unplug the two plugs at the fan.
• Replace fan.
9.19. Compressor M2
• Remove upper housing part with lid (4 screws).
• Lift up the upper housing part and the lid.
• Loosen the four hex nuts at the compressor below.
• Loosen the cable at compressor.
• Replace compressor.
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
36/51
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).
• Lift up the upper housing part and the lid.
• Loosen the fastening screws at the inner side of the lid.
• Pull up the external lid part out of the guideway.
• Remove lid spring.
• Unscrew hinge from cover.
• Replace hinge block.
CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset
37/51
10. Speedometer-code-position of the rotors
MIKRO 22 / 22 R
Speedo-
meter-
Position
occupied
Rotor
code-No.
0 1001 0000 1111 SK 57.98-1
1 1001 0001 0111 1015, 1016
2 1001 0001 1011 1158
3 1001 0001 1101 1151
4 1001 0001 1110 1159, 1195
5 1001 0100 0111 1154
6 1001 0101 0101 1153, 1189
7 1001 0101 0110 1157
8 1001 0101 1010
9 1001 0110 0011
10 1001 0111 0001 E1729
11 1001 1000 0111 1020, 1013
12 1001 1000 1011 1161
13 10011000 1101 1048
14 1001 1010 0011 1023
15 1001 1100 0011
38/51
Used cable colours and their short codes:
colour short code
black BK
brown BN
red RD
orange OG
yellow YE
blue BU
violet VT
green GN
grey GY
white WH
pink PK
gold GD
silver SR
green-yellow GNYE
39/51
G
balance switc
V
11. Circuit diagrams
11.1. Mains supply with supply board (SB) 230 V
Netz/mains
230V/50Hz
erätestecker
appliance plug
B4
Überspannungsschutz
F1
overvoltage protection
BK
GNYE
WH
zum Übertemperaturschalter F3
to overtemperature
switch F3
zur Netzdrossel L1
to mains coke coil L1
WH
BK
Funkentstörfilter
radio interference
suppression filter
Z1
X5
6
54321
Zur Kühlungsplatine A3 / X1
to cooling board A3 / X1
3 2
WH
BK
WH
BK
n.c.
X6
1
234
Optokoppler
optocoupler
WH
BK
3
4
+Ub
WH
WH
WH
BK
ersorgungsplatine
supply board
Verschlußrelais
lid-locking relais
Q1
Netzschalter
mains switch
WH
P1
BK
P2
A1
+Ub
X2
12345678910111213141516
Deckelverriegelung
lid lock
Y1
RD
BK
zur Kühlungsplatine A3
to cooling
board A3
40/51
X7
X8
+Ub
10...15V
+Ub
+5V
12345678910
zum Frequenzumrichter
to frequency converter
A2 / S501
Pin 4 GND (Pin 2)
Tachosignal / tacho signal
X9
+8V ... +15V
GND
6 Impulse pro Umdrehung (siehe Tachocode)
6 pulses per revolution (see tacho code)
10...15V
X4
123 4
123 4
U
Drehzahlsensor
speed sensor
BK
+Ub
BU
X3
B3
Unwuchtschalter
im
1
234
123 4
RD RD
S1
zum Steuerteil A4 / X1
to control panel A4 / X1
X3 Pin 4 GND (Pin 1)
Unwucht / Imbalance
Unwucht
imbalance
OK
+5V
GND
h
A
balance switc
V
11.2. Mains supply with supply board (SB) 115 V
Netz/mains
115V /6 0Hz
Gerätestecker
appliance plug
B4
Überspannungsschutz
overvoltage protection
F1
BK
GNYE
WH
zum Übertemperaturschalter F3
to overtemperature
switch F3
zum Frequenzumrichter A2 / S102 / N
to frequency converter
2 / S102 / N
WH
BK
Funkentstörfilter
radio interference
suppression filter
Z1
LOAD
X5
6
54321
LINE
WH
BK
BK WH
n.c.
Zur Kühlungsplatine A3 / X1
to cooling board A3 / X1
2 3
BK WH
3
4
X6
1
234
+Ub
Optokoppler
optocoupler
WH
WH
WH
BK
ersorgungsplatine
supply board
Verschlußrelais
lid-locking relais
Q1
Netzschalter
mains switch
WH
P1
BK
P2
A1
+Ub
X2
12345678910111213141516
Deckelverriegelung
lid lock
Y1
RD
BK
zur Kühlungsplatine A3
to cooling
board A3
X7
X8
+Ub
10...15V
+Ub
+5V
12345 678910
zum Frequenzumrichter
to frequency converter
A2 / S501
Pin 4 GND (Pin 2)
Tachosignal / tacho signal
X9
+8V ... +15V
GND
6 Impulse pro Umdrehung (siehe Tachocode)
6 pulses per revolution (see tacho code)
10...15V
U
+Ub
X4
123 4
123 4
BK
Drehzahlsensor
speed sensor
BU
X3
B3
Unwuchtschalter
im
1
234
123 4
RD RD
S1
zum Steuerteil A4 / X1
to control panel A4 / X1
X3 Pin 4 GND (Pin 1)
Unwucht / Imbalance
Unwucht
imbalance
OK
+5V
GND
h
41/51
g
g
11.3. Circuit diagram supply board (SB)
Fehlermeldung von FC
error message from FC
+5V
GND
(-)485-Bus
(+)485-Bus
FC-Fehler
FC-ERROR
RxD
listen/talk
TxD
Hardware-stop
Tac h o
mains input
Netzeingan
lid loc k
Ver schl uß
Hardwa re-stop
Ver schl ußre lai s
lid lock relay
Deckel offen-Meldun
lid open-message
Unwucht GND
imbalance GND
Unwucht
imbalance
Tac h o
Netz
mains
Stillstand
standstill
Deckel
motor-fan
Motor-Lüfter
lid
115 V Ver si on
TR1
R16
115V/12V
Brücke/bridge
Zur Kühlplatine
to cooling board
42/51
3
11.4. Connecting diagram and component layout supply board (SB)
zum Frequenzumrichter A2 / S501
to frequency converte r A2 / S5 01
zur Kühlungsplatine
to cooling board
RD
1
3
S1
Unwuchtschalter
Imbalance switch
B3
Drehzahlsensor
speed sensor
zum Steue rteil A4 / X1
to control panel A4 / X1
RD
V
Diagramm
Pin 12
GND
Diagramm
Pin 14
V
RD
GND
Transp
BU
BK
10...14V
V
BK
zur Kühlungsplatine A3
to cooling board A3
X7
X3
1234
X4
1234
X8
n.c.
X5
Y1
Verschlu ß
Lid lock
34
zum Netzschalter Q1
WH
WH
LINE
Z1
LOAD
Funke ntstörfilter
radio suppression filter
WH
to mains switch Q1
BK
BK
115 V Ausführung
115 V model
zum Frequenzumrichter A2 / S102 / N
BK
to fre quency converte r A2 / S102 / N
zum Übertemperaturschalter F3
to overtemperature switch F3
WH
WH
BK
WH
6
3
Funke ntstörfilter
radio suppression filter
4
5
2
1
BK
WHWHBK
WH
BK
Z1
BK
WH
34
zum Netzschalter Q1
to mains switch Q1
32
zur Kühlungsplatine A3 / X1
to cooling board A3 / X1
230 V Ausführung
230 V model
zur Netzdrossel L1
to mains coke coil L1
zum Übertemperaturschalter
to overtemperature switch F
43/51
X1 Pi
GND
V
11.5. Signals at control cable (between CP-SB)
X1 Pin 3 GND
Verschluß offen
oder Lauf
lid locking open
or run
Verschl ußmag net
lid locking magnet
aktiviert
activated
+U
GND
B
X1 Pin 4 GND
FC Hardware Stop
Deckel offen
Deckel zu
lid closed
lid open
+U
GND
n 5
B
Deckel zu
lid closed
Deckel offen
lid open
+5V
GND
+5V
talk
GND
+5V
GND
+5V
GND
X1 Pin 12 GND
Unwucht / Imbalance
Unwucht
imbalance
OK
listen
TxD (4800 B)
RxD (4800 B)
+5V
GND
X1 Pin 8 GND
ser. Schnittstelle vom CP
ser. interface from CP
t
X1 Pin 11 GND
ser. Schnittstelle vom CP
ser. interface from CP
t
X1 Pin 6 GND
ser. Schnittstelle zum CP
t
ser. interface to CP
X1 Pin 13 GND
FC-ERROR
FC-Fehler
OK
kein Fehler
no ERROR
+5V
GND
X1 Pin 7 GND : 0V
X1 Pin 9 GND : 0V
X1 Pin 10 GND : 0V
X1 Pin 14 GND
Tachosignal / tacho signal
+8V ... +15
GND
6 Impulse pro Umdrehung
siehe Tachocode
6 pulses per revolution
see tachocode
nur bei Zentrifuge mit Kühlung
only centrifuge with cooling
X101 Pin 8 GND
Spannung vom Temperaturfühler
voltage from temperature sensor
Unterschied / difference 1°K = 10mV
25°C = 2.98V
44/51
X101 Pin 2 GND
Kühlung aus / ein
cooling off / on
aus
off
ein
on
+8V ... +15V
GND
X101 Pin 4 GND
Übertemp. im Kessel
overtemp. in the chamber
Übertemp.
overtemp.
OK
+5V
GND
11.6. Block diagram control panel (CP)
+5V
+Ub
X1
2345678910111214 131516 1
Verschluss / lid locking
Deckel offen / lid open
U (5.00V)
ref
Reset
FC Stop
RxD
Tastatur / keyboardLCD - Display
zur Kühlungsplatine
(CB) A3 / X4
zur Versorgungsplatine (SB) A1 / X2
(nur gekühlte Version)
to cooling board
to supply board (SB) A1 / X2
(CB) A3 / X4
(only refrigerated version)
X101
2345678910 1
GND
+Ub
empfangen / senden
listen / t alk
TxD
Unwucht / imbalance
FC - ERROR
Tac h o in
&
&
Temp.-fühler
temp. sensor
µP
EEPROM
Kühlung aus / ein
cooling off / on
Übertemp.-erkennung
overtemp. detection
+5V
+5V
LED - Anzeige
LED indicators
EPROM
GND
241
X100
Steuerteil A4
control panel A4
45/51
11.7. Connecting diagram Control board (CP)
Steuerteil A4
control panel A4
X3
0
1
2
3
4
X101 X1
11
1610
4
X100
1
10
A4/X101 A4/X1
1
10 16
A3/X4 A1/X2
zur Kühlungspaltine
nur gekühlte Version
to cooling board
only refigerated Version
1
11
zur Versorgungsplatine
to supply board
16
46/51
11.8. Block diagram and signals at frequency converter (FC)
>
1 2
Signale an S501:
signals at S501:
Pin 3 = A GND
+5V
GND
Pin 4 GND
+5V
FC- Fehler
FC- ERROR
kein Fehler
no ERROR
Pin 5 = B GND
+5V
Pin 7 GND
+5V
Deckel zu
Lid closed
GND
GND
FC Hardware Stop
Deckel offen
Lid open
GND
L1
Netzdrossel L1
mains choke coil L1
Übertemperaturschalter F3 für R1
overtemperature switch F3 for R1
Pin 8 GND
+8V ... +15V
Tachosignal / tacho signal
DC
U
U
>
F3
GND
47/51
A
11.9. Connecting diagram frequency converter (FC)
U = Netzspannung /
AC
mains voltage
U = U x 2
DC AC
U
U
DC
U
U
AC
zur Versorgungsplatine A1 / X9
to supply board A1 / X9
S501
S501
-
P10
+
U1
PE
+
N
S102
P1
-
>
12
S2
2 Frequenzumrichter/
frequency converter
2
S2
1
S101
BU
W2
BN
V2
BK
U2
R1
Bremswi derstand
brake resistor
F3
Übertemperaturschalter für R1
overtemperature switch for R1
Netzdrossel L1
(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. XXXX-07-00)
vom Funkentstörfilter Z1/3
from radio interference
suppression filter Z1/3
L1
)
vom Funkentstörfilter Z1/4
from radio interference
suppression filter Z1/4
Bremswiderstand 230 V Ausführung: 160 Ω
Brake resistor 115 V Version: 70 Ω
Motorwiderstand (kalter Motor, zwischen je 2 Leitungen)
Motor resistance value (cold motor, between 2 wires)
230 V Ausführung: 1,5 Ω
115 V Version:
Motor / motor
3
M1
48/51
V
l
i
A1
11.10. Circuit diagram cooling board
Ausführung
vom Funkentstörfilter Z1 (230 V )
ne
at
ersorgungsp
von
Ausführung
von Netzschalter Q1 (115 V )
from supply board A1
WH
BK
Motorschutzschalter
motor protective switch
2
BK
Z1 / 2
Q1 / 3
Z1 / 1
Q1 / 4
BK
X1
WH
21345
VDR1
from mains switch Q1 (115 V model)
from radio inference suppression filter Z1 (230 V model)
X7
X8
+Ub
WH
654321
6
R1
10R/250V
C1
220nF/250V
1
1
REL1
C
RP330012
3
AP
+Ub
BC327
1N4148
D2
2
X2
M3
M2
12
SM
T1
100nF
C6
1
startup condenser
Anlaufkondensator
R4
R3
1k7
2k2
C6
1
1
X3
D1
1N4148
100nF
2
2
C2
R2
10k
456
456
zum Steuerteil A4 / X101
to control panel A4 / X101
5678910
234
1
X4
213456789
C3
100nF
100 F/35V
C5
100nF
C4
100nF
10
cooling board A3
Kühlungplatine A3
12
123456
YE (GY)
GN (YE)
BN (GN)
WH (BN)
YE
YE
B2 B1
49/51
y
)
11.11. Connecting diagram and component layout cooling board
Ausführung
Ausführung
WH
Z1 / 2
Q1 / 3
BK
Z1 / 1
Q1 / 4
from mains switch Q1 (115 V model)
von Netzschalter Q1 (115 V )
vom Funkentstörfilter Z1 (230 V )
from radio inference suppression filter Z1 (230 V model
1
4
3
2
6
5
C
AP
SM
12
2
1
1
3
Motorschutzschalter
motor protective switch
BK
WH
M
REL1
D2
12
X1
X1
5
14
2
C7
T1
1
Anlaufkondensator
startup condenser
6
3
VDR1
C1
M2
R1
R2R3
R4
D1
1
X3
C6 C4 C5
C2
C3
+
X4
1
A3 / X4
123456
WH
BN
GN
YE
B1
BN or YE or PK
WH or GN or GY
B2
A4 / X101
zum Steuerteil A4
to control panel A4
X7
Übertemperaturschalter im Kühlsystem
overtemperature switch in cooling system
zur Versorgungsplatine A1
to suppl
X8
board A1
Temperaturfühler und Über-
temperaturschalter im Kessel
temperature sensor and overtemperature
switch in centrifuge chamber
50/51
12. Technical specifications
Manufacturer
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 60 Hz
Connected load 700 VA 650 VA 900 VA 900 VA
Current consumption 3.1 A 6.0 A 3.7 A 7.5 A
Power consumption 450 W 450 W 650 W 750 W
Refrigerant ----- R 404A
Max. capacity 60 x 2,2 ml 6 x 50 ml
Max. density 1.2 kg/dm3
Speed RPM 18000
Force RCF 31880
Kinetic energy 9900 Nm
Obligatory inspection no
Environment
− Ambient temperature
− Relative humidity
descending in a linear pattern down to 50% at 40°C
Sample overtemp.
Class of protection
EMC ISM (Industrial Science Medicine)
− Emission
(Radio interference
suppression)
− Immunity
Noise level
(dependent on rotor)
Dimensions
• Width
• Depth
• Height
Weight ca. 16.3 kg 36.3 kg
EN 55011
Class B
≤ 15 K
58 - 62 dB(A) 57 - 64 dB(A)
333 mm 333 mm
390 mm 620 mm
278 mm 278 mm
Hettich Zentrifugen
D-78532 Tuttlingen
5°C up to 40°C
max. 80% up to 31°C,
Ι
FCC
Class B
according to EN 50082-2
EN 55011
Class B
-----
FCC
Class B
51/51
Loading...