Eppendorf Reference - Manual (Page 21)

20
Control button
jams, moves
erratically. – Piston contaminated.
– Seals contaminated.
– Penetration of solvent
vapors.
– Clean piston and lubricate
lightly.
– Disassemble pipette. Clean
all seals and exchange
where necessary
(see Part B, Maintenance).
– Unscrew pipette at the
central junction and
ventilate.
Clean piston and lubricate
lightly.
Pipette
blocked,
too little liquid is
aspirated. – Liquid has penetrated the tip
cone and dried.
For 25 to 500 μL pipettes:
– The filling tube in the nose
cone is blocked.
– Unscrew pipette at the
central junction, rinse lower
part first with warm water,
then with distilled water and
allow to dry.
Or:
– Disassemble pipette.
Replace ejector seal in the
tip cone (see Part B, Mainte-
nance).
For 25 to 50 μL:
– Replace tip cone.
For 100 to 500 μL:
– Replace the filling tube in
the tip cone (see Part B,
Maintenance).
Error Cause Solution
Eppendorf Reference® – Part A – Chapter 10