Hettich Universal 320 Service manual
Repair instructions
UNIVERSAL 320
UNIVERSAL 320 R
10.08 Andreas Hettich GmbH & Co. KG AR1401EN
Andreas Hettich GmbH & Co. KG
Föhrenstraße 12, D-78532 Tuttlingen / Germany
Phone (07461) 705-0
Fax (07461) 705-125
info@hettichlab.com, service@hettichlab.com
www.hettichlab.com
© 2005 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!
AR1401EN / 10.08
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Contents
1 Introduction ..............................................................................................................5
2 Symbol meanings..................................................................................................... 5
3 Description of the centrifuge.....................................................................................6
3.1 Operating panel (A2)......................................................................................... 6
3.2 Electronics U320 resp. U320R (A1) .................................................................. 6
3.3 Special features ................................................................................................7
3.4 Brake resistor (R1) ............................................................................................7
3.5 Motor (M1) / tacho system (B4, B2.1) ...............................................................7
3.6 Imbalance sensor (B2.2) ...................................................................................8
3.7 Motor-driven lid lock (A3) .................................................................................. 8
3.8 Cooling system..................................................................................................8
3.9 Safety devices...................................................................................................9
4 Troubleshooting procedures.....................................................................................9
5 Error messages...................................................................................................... 10
5.1 MAINS RESET................................................................................................ 10
5.2 Brief description ..............................................................................................10
5.3 Description and elimination of errors............................................................... 12
6 Settings and interrogations.....................................................................................23
6.1 Summary of the possible settings and interrogations...................................... 23
6.2 Acoustic signal ................................................................................................ 24
6.3 Operating hours ..............................................................................................25
6.4 Blank the machine type in the display .............................................................26
6.5 Automatic repetition of the centrifugation run.................................................. 27
6.6 Function test ...................................................................................................28
6.7 Logging the occurred faults............................................................................. 32
6.8 Checking the motor slippage........................................................................... 34
6.9 Parameter interrogation ..................................................................................35
6.10 Display of the frequency converter temperature and the measured speeds ... 36
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6.11 Imbalance values............................................................................................ 37
6.11.1 Setting the imbalance switch-off .............................................................. 37
6.11.2 Imbalance values of the last centrifugation run........................................ 39
6.11.3 Imbalance values during centrifugation run ............................................. 40
6.12 Cooling parameters ........................................................................................ 41
6.12.1 Switch-on delay of the Standby cooling................................................... 41
6.12.2 Pre-cooling speed.................................................................................... 42
6.12.3 Temperature values during standstill....................................................... 43
6.12.4 Temperature values during centrifugation run ......................................... 44
6.12.5 Compensate the temperature sensors .................................................... 45
6.13 Initialise and read out the EEPROM ............................................................... 47
6.14 Activate the functions for the operation with an external
refrigerating/heating circulator in the programme ........................................... 49
6.15 Setting the display contrast............................................................................. 50
7 Functional check after a repair............................................................................... 51
8 General arrangement of the components .............................................................. 52
9 Technical documents............................................................................................. 56
9.1 Tachometer code configuration of the rotors .................................................. 56
9.2 Cooling diagram.............................................................................................. 57
9.3 Connecting diagram........................................................................................ 59
9.3.1 Abbreviations of the cable colours........................................................... 59
9.3.2 Connecting diagram mains input UNIVERSAL 320 / 320 R..................... 59
9.3.3 Connecting diagram UNIVERSAL 320 / 320 R........................................ 60
9.3.4 Connecting diagram UNIVERSAL 320 R Heating/cooling ....................... 62
9.4 Technical specifications.................................................................................. 64
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1 Introduction
• Repairs must only be carried out by personnel authorised to do so by the
manufacturer.
Interventions and modifications at centrifuges, which have been conducted
by persons not authorized by the Andreas Hettich GmbH & Co. KG
company, 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 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.
If no original spare parts or no original accessories are used, any guarantee
claim or liability claim against the Andreas Hettich GmbH & Co. KG
company ceases to exist.
• Information about the operation of the centrifuge please see operating instructions.
• We reserve all rights for these technical documents.
2 Symbol meanings
Symbol on the machine:
Attention, general hazard area.
Before using the centrifuge implicitly read the operating instructions and pay
attention to the safety relevant references!
Symbol in this document:
Attention, general hazard area.
This symbol refers to safety relevant warnings and indicates possibly
dangerous situations.
The non-adherence to these warnings can lead to material damage and injury
to personal.
Symbol in this document:
This symbol refers to important circumstances.
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3 Description of the centrifuge
These microprocessor controlled centrifuges mainly consist of the following electrical
components:
• Operating panel (A2)
• Electronics U320 (A1) resp. Electronics U320R (A1)
• Motor with 2 speed sensors (B2.1, B4) and imbalance sensor (B2.2)
• Brake resistor (R1)
• Motor-driven lid lock (A3)
• Cooling system
3.1 Operating panel (A2)
The buttons, the LCD display, the status LEDs and the acoustic beeper are located on
the operating panel.
The operating panel is connected with the Electronics U320 (A1) via a 16-pole flat
ribbon cable.
3.2 Electronics U320 resp. U320R (A1)
There are 2 microprocessors on the Electronics U320 . Both processors (control- and
drive-processor) are communicating internal via a serial interface.
The control-processor carries out the following tasks:
• Reading in the buttons and controlling the LCD display and the LEDs.
• Saving of 9 run programs.
• Evaluating the errors recognized by the frequency converter.
• Voltage supply and evaluation of both speed sensors (tacho).
• Voltage supply and evaluation of the imbalance sensor.
• Controlling the motor-driven lid lock.
• Voltage supply 15 V DC and 5 V DC for the operating panel.
• Evaluating the temperature sensors and controlling the cooling.
• Evaluating the overtemperature switch in the centrifuge chamber.
• Status indication with an orange respectively a red LED:
All functions are all right: the yellow LED lights up
Case of error: the yellow LED flashes
Control-processor does not clock: the yellow LED does not light up
The frequency converter carries out the following tasks:
• Generating the motor current supply
(three-phase current with variable frequency and voltage)
Functional description: The supply voltage is rectified, smoothened and
chopped into a pulse width pattern in three bridge
elements with a microprocessor.
• Monitoring the motor current.
• Evaluating the overtemperature switch in the motor.
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• The braking chopper transfers the electrical energy produced during braking, in the
230 V version from a voltage of approx. 400 Volt and in the 115 V version from a
voltage of approx. 209 Volt, to the brake resistor in a controlled manner.
• 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.
3.3 Special features
• Multiprocessor concept:
The control- and the drive-processor monitoring one another. If one processor stops
working, the other processor switches off the drive.
• Interface concept:
The information transmission is monitored with an additional check sum.
• Hardware concept:
All safety related switches are break contacts. This also ensures that loose contacts
and cable rupture can be detected.
3.4 Brake resistor (R1)
• An overtemperature fuse protects the brake resistor against fire. If the braking
chopper has a short circuit, the brake resistor becomes hot due to the high current,
and the overtemperature fuse (F1) disconnects the supply voltage of the centrifuge.
3.5 Motor (M1) / tacho system (B4, B2.1)
• The motor is a three-phase asynchronous motor with two pairs of poles.
• A speed sensor (B4, speedometer) which is screwed onto the motor receives
− the rotor code information and
− the speed information (6 pulses per revolution)
from the magnets of the tacho ring attached to the rotor.
• An additional speed sensor (B2.1, speedometer) is together with the imbalance
sensor (B2.2) in one housing. This housing is screwed to the bottom of the motor.
The speed signal (1 pulse per revolution) will be triggered by a magnet fixed at the
motor axle. This signal is used for the release of the motor-driven lid lock.
• The Electronics U320 (A1) monitors and regulates the speed.
− Double safety:
The drive-processor has been programmed in such a way that it
switches off the drive when the speed is higher than the permissible rotor speed. Then error message "FU/CCI-ERROR 84" will
be displayed.
• The Electronics U320 (A1) monitors the rotor standstill.
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3.6 Imbalance sensor (B2.2)
• An electronic sensor monitors the imbalance.
• The imbalance sensor and the speed sensor (B2.1) are together in one housing,
screwed to the bottom of the motor.
• Imbalance is detected only in running mode (starting, centrifuging and braking).
• If impermissible imbalance is detected, the drive switches off and the rotor slows
down braked until it stops.
3.7 Motor-driven lid lock (A3)
• The lid can be opened only if the Electronics U320 (A1) has detected rotor standstill.
• By pressing the key
STOP / OPEN
the lid opens motor-driven.
• The motor locks the lid only if both lid brackets have actuated both switches in the lid
lock and the rotor has standstill.
• The centrifuge can only be started when the lid is closed.
3.8 Cooling system
The cooling system is a hermetical system.
The cooling system consists of the following components:
• Compressor
• Cooling tubes around the centrifuge chamber (evaporator)
• Condenser
• Dryer
• Fan
• Temperature sensor T1 (B1) and overtemperature switch in the centrifuge chamber
• Temperature sensor T3 (B3) on the condenser
In the housing of the temperature sensor T1 also the overtemperature switch is
included. With centrifuges with cooling the drive switches off, when the temperature is
> 60°C.
The refrigerant will be cooled down with a fan. The speed of the fan is controlled
dependent to the temperature at the condenser.
When opening the lid of the centrifuge, the cooling system switches off. The cooling
system is controlled dependent to the speed of the rotor.
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3.9 Safety devices
Mains switch
Over voltage protection and
radio interference suppression
filter
Additional radio interference
suppression filter
Frequency converter
Motor
Centrifuge chamber
4 Troubleshooting procedures
• Fuses in installation in which centrifuge is installed are intact.
• Supply voltage present at (see circuit diagram):
− Connecting cable
− Appliance plug
− Mains switch
− Electronics U320 (A1), plug S100
• Look for the displayed error code in the chapter "Error messages".
• Remedy the error according to the instructions.
• Carry out a functional check after every repair and whenever a component is
replaced, see chapter "Functional check after a repair".
with thermal overload protection
⇒
on Electronics U320 (A1)
⇒
in mains input circuit (only with 120 V model)
⇒
on Electronics U320 (A1), electrically protected
⇒
Overtemperature switch (> 140 °C)
⇒
Overtemperature switch (> 60 °C)
⇒
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5 Error messages
5.1 MAINS RESET
• Switch off the mains switch.
• Wait at least for 10 seconds and then switch on the mains switch again.
5.2 Brief description
Error designation No. Brief description Page
TACHO-ERROR 1 Speed sensor on top of the motor: Speedometer
pulses break down during rotation
TACHO-ERROR 2 No speedometer pulses after start command 12
IMBALANCE (3)* Imbalance on motor axle 13
CONTROL-ERROR 4 Lid lock error: lid opened without recognizing
rotor is at standstill
N > MAX 5 Excessive speed error, 250 RPM above n-max of
rotor
CONTROL-ERROR 6 Lid lock error 14
CONTROL-ERROR 8 Lid lock error 14
ROTORCODE 10.1 No start code recognized 14
ROTORCODE 10.2 Invalid rotor code 14
ROTORCODE 10.3 Error during reading the rotor code 15
MAINS INTERRUPT (11)* Mains interruption 15
N < MIN 13 Speed error: slippage is too high 15
CONTROL-ERROR 21 Faulty speed measurement 16
12
13
13
CONTROL-ERROR 22 Electronics U320 (A1): I2C bus 16
CONTROL-ERROR 23 Operating panel: Display-Timeout 16
CONTROL-ERROR 25 Electronics U320 (A1): EEPROM 16
CONTROL-ERROR 27 Electronics U320 (A1): EPROM 16
CONTROL-ERROR 29 Electronics U320 (A1): RAM 16
SER I/O-ERROR 30 Interface - error: Software protocol 16
SER I/O-ERROR 31 Interface - error: Timeout 16
SER I/O-ERROR 33 Interface - error: Software protocol parity bit 16
SER I/O-ERROR 36 Interface - error: NAK 16
* Error number will not be displayed
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Error designation No. Brief description Page
°C / *-ERROR 51 Overtemperature on condenser 17
°C / *-ERROR 52 Overtemperature in centrifuge chamber 17
°C / *-ERROR 53 Temperature sensor in centrifuge chamber is
defective
°C / *-ERROR 55 Temperature sensor on condenser is defective 18
FU/CCI-ERROR 60 Faulty release signal to frequency converter
(drive-processor)
FU/CCI-ERROR 61 Frequency converter - error: computing section 18
FU/CCI-ERROR 62 Frequency converter - error: undervoltage 19
FU/CCI-ERROR 63 Frequency converter - error: overcurrent 19
FU/CCI-ERROR 64 Frequency converter - error: overvoltage 19
FU/CCI-ERROR 67 Frequency converter - error: overtemperature in
motor
FU/CCI-ERROR 68 Frequency converter - error: overtemperature in
frequency converter
FU/CCI-ERROR 82 Frequency converter - error: short circuit cut-off 20
FU/CCI-ERROR 83 Frequency converter - error: PFC-overload 20
FU/CCI-ERROR 84 Frequency converter - error: Frequency con-
verter recognizes
excess speed
17
18
20
20
21
FU/CCI-ERROR 85 Frequency converter - error: "Watchdog" in
frequency converter
had triggered
SENSOR-ERROR 90 No mains synchronisation 21
SENSOR-ERROR 91 Imbalance sensor - error 21
SENSOR-ERROR 92 Imbalance sensor - error 21
SENSOR-ERROR 93 Imbalance sensor – error: monitoring of the
temperature
NO ROTOR (95)* No rotor installed 22
TACHO-ERROR 96 Speed sensor at the bottom of the motor:
Speedometer pulses break down during rotation
N > ROTORMAX --- Speed in the selected program higher than the
maximum speed of the rotor (Nmax)
* Error number will not be displayed
21
22
22
22
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5.3 Description and elimination of errors
TACHO - ERROR 1
Error During centrifugation the speedometer pulses of the speed sensor
(B4) on top of the motor are interrupted.
Error
consequence
The rotor slows down braked until it stops.
No further user operation is possible.
After about 3 minutes the lid lock will be enabled and the lid can be
opened.
Cause of error /
measurements
• Speed sensor (B4) on top of the motor defective or loose contact
on plug.
Measure supply voltage on plug S700 / Electronics U320 (A1)
pin 2 – pin 3 (+14-18 VDC).
Measure speedometer pulses on plug S700 / Electronics U320
(A1) pin 2 - pin 4 (signal).
• Electronics U320 (A1) is defective.
Error code reset Open the lid. Turn the rotor by hand and perform a MAINS RESET
while the rotor is turning.
TACHO - ERROR 2
Error After start-up no speedometer pulses will be received from both
speed sensors (B4, B2.1).
Error
consequence
The rotor slows down braked until it stops.
No further user operation is possible.
After about 3 minutes the lid lock will be enabled and the lid can be
opened.
Cause of error /
measurements
• Motor is blocked or is defective.
• Loose contact on motor plug S103.
• Both speed sensors (B4, B2.1) defective or loose contact on
plug.
− Speed sensor on top of the motor:
Measure supply voltage on plug S700 / Electronics U320 (A1)
pin 2 – pin 3 (+14-18 VDC).
Measure speedometer pulses on plug S700 / Electronics
U320 (A1) pin 2 - pin 4 (signal).
− Speed sensor at the bottom of the motor:
Measure supply voltage on plug S600 / Electronics U320 (A1)
pin 6 – pin 8 (+14-18 VDC).
Measure speedometer pulses on plug S600 / Electronics
U320 (A1) pin 6 - pin 7 (signal).
• Electronics U320 (A1) is defective.
Error code reset Open the lid. Turn the rotor by hand and perform a MAINS RESET
while the rotor is turning.
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IMBALANCE
Error Imbalance on motor axle.
Error
The rotor slows down braked until it stops.
consequence
Cause of error /
measurements
• Weight difference in rotor components.
• Check the maximum permissible imbalance values in the
"SELECT MODE".
• Imbalance sensor (B2.2) is defective.
Measure on Electronics U320 (A1) / plug S600, pin 6 – pin 1
(+5 VDC).
• Electronics U320 (A1) is defective.
Error code reset Open the lid or perform a MAINS RESET.
CONTROL - ERROR 4
Error Lid lock is open during centrifugation.
Error
consequence
Cause of error
The rotor slows down without braking until it stops.
No further user operation is possible.
• An emergency unlocking was performed during the centrifugation
run.
• Electronics U320 (A1) is defective.
Error code reset After the rotor has stopped perform a MAINS RESET. After turning
the centrifuge on again, press the button
STOP / OPEN
so that the motor-
driven lid locking once again assumes the normal position (opened).
N > MAX 5
Error Excess speed. The speed measured by the speed sensor (B4) is
250 RPM higher than the n-max speed of the rotor.
Error
consequence
Cause of error /
measurements
The rotor slows down braked until it stops.
No further user operation is possible.
• Speed sensor (B4) on top of motor defective or loose contact on
plug.
Measure supply voltage on plug S700 / Electronics U320 (A1)
pin 2 – pin 3 (+14-18 VDC).
Measure speedometer pulses on plug S700 / Electronics U320
(A1) pin 2 - pin 4 (signal).
• Electronics U320 (A1) is defective.
Error code reset Perform a MAINS RESET.
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CONTROL - ERROR 6
Error Lid lock error
Error
consequence
Cause of error
Error code reset Perform a MAINS RESET.
CONTROL - ERROR 8
Error Lid lock error
Error
consequence
Cause of error
Error code reset Open the lid. Turn the rotor by hand and perform a MAINS RESET
ROTOCODE 10.1
Error Start code of the rotor coding not recognized.
No further user operation is possible.
• Mains voltage is too low. Admissible mains voltage see chapter
"Technical specification".
• The motor of the lid lock runs too slowly or it is blocked.
No further user operation is possible.
• Electronics U320 (A1) is defective.
while the rotor is turning.
Error
consequence
Cause of error
Error code reset Open the lid or perform a MAINS RESET.
ROTORCODE 10.2
Error An invalid rotor code was read in during start-up.
Error
consequence
Cause of error
Error code reset Open the lid or perform a MAINS RESET.
The rotor slows down braked until it stops.
• Magnetic code on the rotor is defective.
• Electronics U320 (A1) is defective.
The rotor slows down braked until it stops.
• Magnetic code on the rotor is defective.
• Electronics U320 (A1) is defective.
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ROTORCODE 10.3
Error Error during reading the rotor code.
Error
The rotor slows down braked until it stops.
consequence
Cause of error
• Magnetic code on the rotor is defective.
• Electronics U320 (A1) is defective.
Error code reset Open the lid or perform a MAINS RESET.
MAINS INTERRUPT
Error Interruption of mains supply during centrifugation.
Error
consequence
During the interruption of the mains supply the rotor slows down
without braking until it stops.
After the interruption of the mains supply the rotor slows down
braked until it stops.
Cause of error
• Power supply has failed.
• Loose contact in electrical connections.
Error code reset Open the lid and press the
START / IMPULS
This error cannot be reset by a MAINS RESET.
N < MIN 13
key.
Error Insufficient speed, motor slippage is too high.
The centrifuge control can readjust the speed by max. 10 % (control
limit).
This error is displayed if the rotor speed (ACTUAL speed) is lower
than the SET speed - 10%.
Error
consequence
Cause of error
The rotor slows down braked until it stops.
No further user operation is possible.
• Motor is labouring (damage to bearings).
• Motor has a short-circuited coil (coil is defective).
• Loose contact in the electrical connections.
• Electronics U320 (A1) is defective.
Error code reset Perform a MAINS RESET.
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CONTROL – ERROR 21
Error Faulty speed measurement.
Error
consequence
Cause of error
Error code reset Perform a MAINS RESET.
CONTROL - ERROR 22, 25, 27, 29
Error Internal error on Electronics U320 (A1).
Error
consequence
Cause of error
Error code reset Perform a MAINS RESET.
CONTROL – ERROR 23
Error Internal error on operating panel
Error
consequence
The rotor slows down braked until it stops.
No further user operation is possible.
• Magnetic code on the rotor is defective.
• Electronics U320 (A1) is defective.
The rotor slows down braked until it stops.
No further user operation is possible.
• Electronics U320 (A1) is defective.
The rotor slows down braked until it stops.
No further user operation is possible.
Cause of error
Error code reset Perform a MAINS RESET.
SER I/O - ERROR 30 - 36
Error Interface - error
Error
consequence
Cause of error
Error code reset Perform a MAINS RESET.
• Operating panel is defective.
The rotor slows down without braking until it stops.
No further user operation is possible.
• Electronics U320 (A1) is defective.
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°C / * -ERROR 51
Error Overtemperature on condenser
Error
consequence
Cause of error /
measurements
Error code reset Perform a MAINS RESET.
°C / * -ERROR 52
Error Overtemperature in centrifuge chamber
Error
consequence
Cause of error /
measurements
The rotor slows down braked until it stops.
No further user operation is possible.
• Temperature on condenser > 58°C.
• The temperature sensor on condenser is defective.
Measure on Electronics U320 (A1) / plug S603, pin 1 – pin 2.
voltage > 3.31 V = Temperature on condenser > 58°C
Voltage at 25°C = 2.98 V (± 20 mV)
A temperature change of 1°K causes a voltage change of 10 mV.
• Electronics U320R (A1) is defective.
• Fan (M3) is defective.
The rotor slows down braked until it stops.
No further user operation is possible.
• Overtemperature switch in centrifuge chamber is defective.
Measure on Electronics U320R (A1) / plug S604, pin 3 – pin 4
Switch closed: 0 VDC
Switch opened: +5 VDC
• Electronics U320R (A1) is defective.
• Cooling is defective.
Error code reset Perform a MAINS RESET.
°C / * -ERROR 53
Error The measured temperature in the centrifuge chamber is out of
range.
Error
consequence
Cause of error /
measurements
Error code reset Perform a MAINS RESET.
The rotor slows down braked until it stops.
No further user operation is possible.
• The temperature sensor in the centrifuge chamber is defective.
Measure on Electronics U320R (A1) / plug S604, pin 1 – pin 2.
voltage < 0.5 V = short circuit
voltage > 4.5 V = disruption
Voltage at 25°C = 2.98 V (± 20 mV)
A temperature change of 1°K causes a voltage change of 10 mV.
• Electronics U320R (A1) is defective.
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°C / * -ERROR 55
Error The measured temperature on the condenser is out of range.
Error
consequence
Cause of error /
measurements
Error code reset Perform a MAINS RESET.
FU / CCI - ERROR 60
Error Error when checking the enable signal to frequency converter after
Error
consequence
Cause of error
The rotor slows down braked until it stops.
No further user operation is possible.
• The temperature sensor on condenser is defective.
Measure on Electronics U320R (A1) / plug S603, pin 1 – pin 2.
voltage < 0.5 V = short circuit
voltage > 4.5 V = disruption
voltage at 25°C = 2.98 V (±20 mV)
A temperature change of 1°K causes a voltage change of 10 mV.
• Electronics U320R (A1) is defective.
the start command.
The lid switch (S2) for the left hook or the lid switch (A3/S1) for the
right hook has opened during the centrifugation run.
The rotor slows down without braking until it stops.
No further user operation possible except opening the lid.
• Switches of the lid lock defective.
Check the function of both switches, see pg. 28, chapter 6.6,
item 19 (ADC 5, ADC 7).
Pull out plug S602 and check the function of the switches at the
plug of the cable between pin 1 - pin 2 (S2, left hook) and
pin 3 - pin 4 (A3/S1, right hook).
• Electronics U320R (A1) is defective.
Error code reset Perform a MAINS RESET.
FU / CCI - ERROR 61
Error Frequency converter - error. Computing section
Error
consequence
Cause of error
Error code reset Perform a MAINS RESET.
18/66
The rotor slows down without braking until it stops.
No further user operation is possible.
• Electronics U320 (A1) is defective.
FU / CCI - ERROR 62
Error Frequency converter - error. Undervoltage in intermediate circuit.
Error
consequence
Cause of error
Error code reset Perform a MAINS RESET.
FU / CCI - ERROR 63
Error Frequency converter - error. Overcurrent.
Error
consequence
Cause of error
Error code reset Perform a MAINS RESET.
FU / CCI - ERROR 64
The rotor slows down without braking until it stops.
No further user operation is possible.
• Mains voltage is too low. Admissible mains voltage see chapter
"Technical specification".
• Electronics U320 (A1) is defective.
The rotor slows down without braking until it stops.
No further user operation is possible.
• Motor impedance is too low.
• Electronics U320 (A1) is defective.
Error Frequency converter - error. Overvoltage.
Voltage in intermediate circuit
> 426 V DC at 230 V
> 230 V DC at 115 V
This error normally only occurs when the drive is being braked.
Error
consequence
Cause of error /
measurements
Error code reset Perform a MAINS RESET.
The rotor slows down without braking until it stops.
No further user operation is possible.
• Check the electrical wiring and the plug (S300) of the brake
resistor.
• Overtemperature fuse on brake resistor has blown.
• Brake resistor is defective.
• Electronics U320 (A1) is defective.
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FU / CCI - ERROR 67
Error Overtemperature in the motor.
Error
consequence
Cause of error /
measurements
The rotor slows down braked until it stops.
No further user operation is possible.
• Overtemperature switch opens because of overtemperature in
the motor.
Remove plug S103 and measure at the plug between pin 7 –
pin 9:
Switch closed: ≈ 0 Ω
Switch opened: ∞ Ω
• Electronics U320 (A1) is defective.
• Motor is defective.
Error code reset Perform a MAINS RESET.
FU / CCI - ERROR 68
Error Overtemperature in frequency converter.
Error
consequence
Cause of error
The rotor slows down braked until it stops.
No further user operation is possible.
• Insufficient heat conduction from frequency converter to support
sheet of electronics U320 (A1). There is no, or not enough, heatconducting paste between frequency converter and support
sheet.
• Full-load operation and an ambient temperature > 45°C.
• Electronics U320 (A1) is defective.
Error code reset Perform a MAINS RESET.
FU / CCI - ERROR 82
Error Frequency converter - error. Short circuit cut-off.
Error
consequence
Cause of error /
measurements
The rotor slows down without braking until it stops.
No further user operation is possible.
• Short circuit in motor.
Remove plug S103 and check at the plug pin 1, pin 3, pin 5 the
resistance of the motor coils, see chapter "Connecting diagram".
• Electronics U320 (A1) is defective.
Error code reset Perform a MAINS RESET.
FU / CCI - ERROR 83
Error Frequency converter - error. PFC-Overload (PFC = Power Factor
Control = switching power supply on mains side).
Error
consequence
Cause of error
The rotor slows down braked until it stops.
No further user operation is possible.
• Electronics U320 (A1) is defective.
Error code reset Perform a MAINS RESET.
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