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Operational Problems
Symptom Probable Cause Resolution
Liquid is not
dispensed from the
dispense pins
(continued).
The wash
protocol is
incorrectly
defined.
Check the system
configuration and wash
protocol for the number
fluids and fluid volume.
The dispense
tubing or the
dispense pump
power supply is
not connected.
Verify that the dispense
tubing and the dispense
power supply are
connected (see page 20).
The dispense
tubing is sealed
shut at the
dispense valve.
Remove the tubing from
the dispense valve and
massage the tubing to
release it. Replace the
tubing into the dispense
valve at a different
location.
Purge the tubing more
frequently.
Replace the tubing.
The dispense
valve does not
open.
Service is required.
The wash head
manifold tubing is
blocked.
Remove the wash head
assembly and clean it
using the manifold head
cleaning wire. Then run a
purge. Service is required
if problem persists.
There is a
pressure leak.
Check the seals and
tubing for leaks.
Check for air leaks.
Reseat the tubing in the
dispense valve.
The dispense
pump is faulty.
Service is required.
Liquid is dispensed
continuously from
the dispense pins
The dispense
tubing is not
inserted in the
dispense valve.
Insert the dispense tubing
into the dispense valve
(see page 20).
78 Opsys MW™ User’s Guide