VACUUBRAND 8-channel tip adapter with ejector - Manual (Page 22)

page 22 of 29
Fault Possible cause Remedy
❑ No aspiration at
the VHC pro . Pipette
drips.
➨ Adapter or aspiration
tube defective?
✔ Replace adapter with
aspiration hose.
➨ Aspiration hose kinked? ✔ Correct hose guide.
➨ Aspiration hose clogged
or agglutinated?
✔ Remove clogged or ag-
glutinated hose section
or replace hose.
➨ Pipette fits loosely or fits
bad?
✔ Connect pipette secure-
ly or choose an appro-
priate adapter.
➨ Leak in the system? ✔ Check the system for
leaks.
➨ No vacuum? ✔ Check the vacuum sys-
tem.
❑ Pipette does not
held properly in the
adapter.
➨ Adapter wet or greasy? ✔ Clean or replace adapter.
➨ Pipette with improper
diameter selected?
✔ Choose appropriate pi-
pette or change adapter.
➨ Seal at the nose cone
defectice?
✔ Replace nose cone.
❑ Liquid is aspirated
slowly or not.
➨ Pipette or nose cone
clogged or damaged?
✔ Clean or replace pi-
pettes or nose cones.
Troubleshooting