Metrohm 843 Pump Station with membrane pump - Manual (Page 26)

6.1 Problems
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843 Pump Station with Membrane Pumps
6 Troubleshooting
6.1 Problems
Problem Cause Remedy
The liquid is not
aspirated, but just
"bubbles" instead. The inlet and outlet tubing
are switched. The outlet
tubing is submerged in the
solution to be aspirated
instead of the inlet tubing. Switch the tubing. Inlet tubing into the solu-
tion and outlet tubing into the waste con-
tainer.
A connected instru-
ment does not run. Mains cable is not connec-
ted. Connect mains cable.
Remote connectors are not
correctly connected. Check remote connectors.
The remote connectors
have been switched. Check connected devices (see Chapter 3.3,
page 11).
The membrane
pump fails to aspi-
rate the solution The inlet or outlet valve is
clogged. Inform the Service Department at your
Metrohm representative.
Membrane pump -
insufficient or no
delivery rate PTFE tubings are kinked. Smooth out kinks.
The membrane platelets
are sticking together. This
can happen when the
membrane pump has been
out of operation for exten-
ded periods. Use a spray bottle to inject a small amount of
water into the inlet valve, then close it tightly
and allow the water a few minutes to take
effect.
There is too much air
between the membrane
platelets while aspirating
and pumping. Inform the Service Department at your
Metrohm representative.