Amersham Pharmacia Biotech INV-907 Gebruiksaanwijzing - Pagina 5
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Pagina afdrukken3 Slide the screws out.
4 Remove the distribution plate containing
the ports.
5 Remove the old channel plate and insert a
new one.
6 Remount a new distribution plate so that
the text
is horizontal and to the right of
3
the central tubing connection. Using
the Allen key, tighten the 4 screws in turn,
a little at a time, until the distribution
plate is fixed to the valve body.
Valve INV-907
Instructions 56-8101-01 Edition AC
5 Trouble shooting
If the suggested actions do not correct the fault,
call Amersham Pharmacia Biotech.
Fault
Action
The valve is not switching
1 Check the connection to the pump.
The valve should be connected to
the UniNet 2 socket, not
the UniNet 1 socket.
2 Check the ID-switch on the valve.
The ID number should correspond
to the number set in UNICORN.
3 Check the UniNet cable and
replace if required.
The valve is switching to wrong position
The valve parts may have been
incorrectly assembled after
replacement.
1 Check that the distribution plate
marking 3 is horizontal.
External leakage
1 Check the tubing connections.
Tighten or replace if required.
Internal leakage
Internal leakage are easy to detect
at the small hole on the underside
of the valve body.
1 Internal valve parts may be worn.
Change channel plate and
distribution plate according to
section 4.
High back pressure (clogging)
1 Do cleaning-in-place according to
the instructions in section 4.
2 Change channel plate and
distribution plate according to
section 4.
Other faults
Contact Amersham Pharmacia
Biotech.
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