CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,
BR : brake resistor, MR : mains reset
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4.2. Description and elimination of errors
TACHO - ERROR 01
Error cause 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 MR during slowing-down causes a DC braking for 3 min.
After the DC braking, the ”open the lid” release takes place.
Further cooling to NOMINAL temperature.
Error remedy
• Speed sensor (speedometer) defective or loose contact on
plug. Measure speedometer pulses on plug X4 / SB (pin 4 -
pin 2).
• CC to CP, or CC to FC is defective.
• SB or CP or FC is defective.
Measurement Also see at SB-X4 and CP-X1 (PIN 14) and FC S501 (PIN 8)
Error code reset Open the lid. Turn the rotor by hand and perform an MR while
the rotor is turning.
TACHO - ERROR 02
Error cause There are no speedometer pulses on the CP 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 MR during slowing-down causes a DC braking for 3 min.
After the DC braking, the ”open the lid” release takes place.
Further cooling to NOMINAL temperature.
Error remedy
• 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 / SB (pin 4 -
pin 2).
• CC to CP, or CC to FC is defective.
• No release signal to FC.
• SB or CP or FC is defective.
Measurement Also see at SB-X4 and CP-X1 (PIN 14) and FC S501 (PIN 8)
Error code reset Open the lid. Turn the rotor by hand and perform an MR while
the rotor is turning.
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