Hettich EBA 20 - Description and Elimination of Errors

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5.3 Description and elimination of errors
– 1 – Tacho error
Error Speed sensor pulses (tacho) break down.
Error
consequence
Drive switch off and brakes with the adjusted brake level.
Error cause
• Carbon brushes worn out.
• Speed sensor (tacho) defective.
• Power board (A1) defective.
• Loosen contact in plug ST5.
Measurement 1. power board A1 / ST5 between pin 2 (GND) and pin 3 (+5V)
2. power board A1 / ST5 between pin 1 and pin 2 (GND)
(pulses: 0V, 5V, 0V, 5V etc. / 6 pulses per revolution)
See also section 11.2.2.
Error code reset Wait for a time duration of 100 sec. After this perform a MAINS
RESET.
– 2 – System reset
Error Mains interrupt during a run
Error
consequence
Drive switch off and brakes with the adjusted brake level.
Error cause
• Power supply has failed.
• Loosen contact in mains lead, appliance plug or the internal
electrical wires.
Error code reset 1. Wait for rotor standstill.
2. Open the lid and press key
START
or perform a MAINS RESET.
– 3 – Imbalance
Error Imbalance on motor axle
Error
consequence
Drive switch off and brakes with the adjusted brake level.
Error cause
EBA 20:
• Plug ST6 is unplugged or has loose contact.
• Power board (A1) is defective.
EBA 20 C:
• Weight difference in rotor components.
• Imbalance switch is defective or not connected.
• Imbalance switch is disadjusted (Adjustment see section
"Imbalance switch-off (only with EBA 20 C)").
• Loose contact in cable or plug ST6.
• Power board (A1) is defective.