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Error Code Centrifuge Hettich EBA-21



MAINS RESET
• Switch off the mains switch.
• Wait for 10 seconds and then switch on the mains switch again.

 
TACHO - ERROR 01
Error During centrifugation the speedometer pulses are interrupted.
Error consequence
The rotor slows down until it stops.
After the rotor stops, there is a DC braking for 30 sec.
An MAINS RESET during slowing-down causes a DC braking for 3 min.
After the DC braking, the ”open the lid” release takes place.
Cause of error / measurements
• Speed sensor (speedometer) defective or loose contact on plug. Measure speedometer pulses on plug X4 / supply board (pin 4 - pin 2).
• Flat ribbon cable to control panel, or flat ribbon cable to frequency converter is defective.
Measure speedometer pulses on control panel / plug X1 (pin 14) and on frequency converter / plug S501 (pin 8).
• Supply board or control panel or frequency converter 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 02
Error There are no speedometer pulses on the control panel after
start-up.
Error consequence
The rotor slows down until it stops.
After the rotor stops, there is a DC braking for 30 sec.
An MAINS RESET during slowing-down causes a DC braking for 3 min.
After the DC braking, the ”open the lid” release takes place.
Cause of error / measurements
• Start-up 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 / supply board (pin 4 - pin 2).
• Flat ribbon cable to control panel, or flat ribbon cable to frequency converter is defective. Measure speedometer pulses on control panel / plug X1 (pin 14) and on frequency converter / plug S501 (pin 8).
• No release signal to frequency converter.
• Supply board or control panel or frequency converter is defective.
Error code reset Open the lid. Turn the rotor by hand and perform a MAINS RESET while the rotor is turning.

IMBALANCE
Error Imbalance on motor axle.
Error consequence
The centrifuge slows down until the “open the lid” release occurs.
Cause of error / measurements
• 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.
Measure on supply board / plug X3 (pin 4), see chapter
"Mains supply with supply board (A1)".
• Loose contact in cable or plug.
• Flat ribbon cable to control panel is defective.
Measure on control panel / plug X1 (pin 12)
• control panel or supply board is defective.
Error code reset Open the lid or perform a MAINS RESET.

CONTROL - ERROR 04
Error Lid lock is open during centrifugation.
Error consequence
Slowing down until the ”open the lid” release occurs.
Cause of error
• Lid lock is defective and can be opened during
centrifugation.
• Loose contact in cable or in plug.
• Flat ribbon cable to control panel is defective.
• Control panel or supply board is defective.
Measurement Measure on supply board / plug X5 (pin 6) and on control panel / plug X1 (pin 5).
Error code reset Perform a MAINS RESET.

N > MAX 05
Error Excess speed. The speed recognised by the speed sensor (speedometer) is 250 RPM greater than the n-max speed of the rotor.
Error consequence
The centrifuge slows down until the ”open the lid” release occurs.
Cause of error
• Insulation of speed sensor (speedometer) cable is
defective.
• Loose contact on speed sensor (speedometer) cable.
• Speed sensor (speedometer) is defective.
• Flat ribbon cable to control panel is defective.
• Control panel or frequency converter or supply board is defective.
Error code reset Perform a MAINS RESET.

ROTORCODE 10
Error An invalid rotor code was read during start-up.
Error consequence
The centrifuge slows down until the ”open the lid” release occurs.
Cause of error
• Magnetic coding on rotor is defective.
• Speedometer system is defective.
• Loose contact on speed sensor (speedometer) plug
• Motor is rotating in the wrong direction.
Error code reset Open the lid or perform a MAINS RESET.

MAINS INTERRUPT
Error Interruption of mains supply during centrifugation.
Error consequence
The centrifuge slows down until the ”open the lid” release occurs.
− 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.
Cause of error
• Power supply has failed.
• Loose contact in electrical connections.
• Flat ribbon cable to control panel is defective.
Error code reset Open the lid and press the START key.

VERSION - ERROR 12
Error Differences in the initialization from control panel (EPROM) or frequency converter.
Error consequence
No further user operation is possible.
Cause of error
• An incorrect EPROM has been plugged into control panel.
• Centrifuge is not initialised. Carry out an initialization, see
chapter "Initialization".
Error code reset Perform a MAINS RESET.

N < MIN 13
Error Insufficient speed, motor slippage is too large.
The centrifuge control can readjust the speed by max. 5 % (control limit).
This error is displayed if the rotor speed (ACTUAL speed) is lower than the SET speed - 5%.
Error consequence
The centrifuge slows down until the ”open the lid” release occurs.
Cause of error
 • Motor is labouring (damage to bearings).
• Motor has a short-circuited coil (coil is defective).
• Loose contact in the electrical connections.
• Frequency converter is defective.
• Release signal to frequency converter was interrupted
during centrifugation.
Error code reset Open the lid and perform a MAINS RESET.

CONTROL - ERROR 21 - 26
Error Internal error in control panel.
Error consequence
The centrifuge slows down until the ”open the lid” release occurs.
Cause of error • Control panel is defective.
Error code reset Perform a MAINS RESET.

SER I/O - ERROR 30 and ERROR 31
Error Control panel has no connection to the component frequency converter via serial interface.
Error consequence
The centrifuge slows down until the ”open the lid” release occurs.
Cause of error
• Plug S501 on the frequency converter is not plugged.
• Flat ribbon cable to frequency converter is defective.
• There is no voltage on frequency converter.
• Cables on connector S102 are not or wrong plugged.
• overtemperature fuse on brake resistor has blown or is not
connected.
• Control panel or frequency converter is defective.
Error code reset Perform a MAINS RESET.

SER I/O - ERROR 33
Error Control panel is not receiving correct data from frequency converter.
Error consequence
The centrifuge slows down until the ”open the lid” release occurs.
Cause of error
• Flat ribbon cable to frequency converter is defective.
• Control panel or frequency converter is defective.
Error code reset Perform a MAINS RESET.

SER I/O - ERROR 34
Error Control panel is not receiving correct data from frequency converter.
Error consequence
The centrifuge slows down until the ”open the lid” release occurs.
Cause of error • Flat ribbon cable to frequency converter is defective.
• Control panel or frequency converter is defective.
Error code reset Perform a MAINS RESET.

SER I/O - ERROR 36
Error Frequency converter sends signal NAK to the control panel after receiving an unknown command. NAK (not acknowledged).
Error consequence
The centrifuge slows down until the ”open the lid” release occurs.
Cause of error • Flat ribbon cable to frequency converter is defective.
• Frequency converter is defective.
• Control panel is defective.
Error code reset Perform a MAINS RESET.

FU / CCI - ERROR 60
Error The release signal was not correctly transmitted to frequency
converter.
The evaluation of the release signal only occurs once aftern MAINS RESET.
Error consequence
No further user operation is possible.
Cause of error
• Flat ribbon cable to frequency converter is defective.
• Flat ribbon cable to control panel is defective.
• Supply board is defective.
Measurement Also see at control panel –X1 (PIN 4) and frequency converter
-S501 (PIN 7).

FU / CCI - ERROR 61
Error Error in computing section.
Cause of error • Flat ribbon cable is defective.
• Frequency converter is defective

FU / CCI - ERROR 62
Error Undervoltage. Mains voltage less than 20% as nominal
voltage.
Cause of error • Supply voltage too low, see chapter "Short the mains choke coil (L1)".
• Flat ribbon cable is defective.
• Frequency converter is defective.
Measurement Also see at frequency converter, UDC.

FU / CCI - ERROR 63

Error Overcurrent.
Cause of error • Short circuit in motor.
• Motor impedance is too low.
• Flat ribbon cable is defective.
• Frequency converter is defective.

FU / CCI - ERROR 64
Error 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. Cause of error
• Brake resistor is defective.
• Flat ribbon cable is defective.
• Frequency converter is defective.
Measurement Also see at frequency converter, UDC.

FU / CCI - ERROR 67
Error Only centrifuges with 115 V.
Overtemperature in the motor. The cable “overtemperature” in the motor has high impedance.
Cause of error
 • Overtemperature switch opens because of overtemperature
in the motor
• Flat ribbon cable is defective.
• Frequency converter is defective.
• Motor is defective
Measurement Also see at frequency converter, remove plug S2 and measure at the plug
Switch closed: ≈ 0 Ω
opened: ∞ Ω

FU / CCI - ERROR 68
Error Overtemperature in frequency converter.
Cause of error • Insufficient heat abduction from frequency converter to centrifuge housing. There is no, or not enough, heatconducting paste between frequency converter and housing.
• Full-load operation and an ambient temperature > 45°C.
• Flat ribbon cable is defective.
• Frequency converter is defective.

FU / CCI - ERROR 69
Error EEPROM in frequency converter is defective.
Cause of error • Flat ribbon cable is defective.
• Frequency converter is defective

FU / CCI - ERROR 84
Error Frequency converter recognises excess speed.
During rotation the speedometer pulses (6 per revolution) are
controlled by the frequency converter. This control is independent from the control panel.
The frequency converter switches the centrifuge off, when the maximum speed of the rotor is exceeded more than 500 rpm.
Cause of error
• Flat ribbon cable is defective.
• Frequency converter is defective.
Measurement Also see at supply board-X4 (PIN 4) and frequency converter -S501 (PIN 8).

FU / CCI - ERROR 85
Error “Watchdog” in frequency converter
Discrepancy in program procedure
Cause of error • Flat ribbon cable is defective.
• Frequency converter is defective.
Error code reset Perform a MAINS RESET.

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