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3.8 Imbalance switch
• A switch (break contact) detects imbalance.
• Imbalance is detected only in running mode (starting, centrifuging and braking).
• If imbalance is detected, the drive is brought to a standstill.
3.9 Safety devices
Mains input
⇒
Mains fuses
Radio interference
suppression filter
⇒
between supply board and frequency converter
Frequency converter
⇒
electronically protected
Motor
⇒
overtemperature switch > 135 °C
4 Troubleshooting procedures
• Fuses in installation in which centrifuge is installed are intact.
• Mains input fuses of centrifuge are intact.
• Supply voltage present at (see circuit diagram):
− Connecting cable
− Appliance plug
− Mains switch
− Supply board, plug X5 (pin 1, pin 5)
• 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".
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