Hettich EBA 21 Repair Instructions

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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, U
DC.
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, heat-
conducting 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

Hettich EBA 21 Specifications

General

Brand	Hettich
Model	EBA 21
Category	Laboratory Equipment
Language	English