Troubleshooting
5
Pump P-960
User Manual 18-1172-73 Edition AA
27
High pressure limit exceeded
The pump inlet or outlet
tubing is pinched or damaged
Check the pump tubing.
Replace if necessary.
A check valve is clogged or
damaged
Remove the check valve
according to section 4.6.2.
Clean the check valve in an
ultrasonic bath. If the leakage
persists, replace the
assembly.
The pressure offset in the
sample pump is not calibrated
properly
Calibrate the pressure offset
according to section 3.5.1
The flow rate is too high
Decrease the flow rate
The pressure limit is too low
Increase the pressure limit
Not running
No power to the system
Check that the power to the
system is switched on
No UniNet-2 communication.
(The green indicator on the
sample pump shows a steady
light when the communication
is established.)
Check the UniNet-2 cable.
Check that Pump P-960 is
initialized in UNICORN (see
section 2.7.
Large spillage over/into the unit
Unplug the UniNet-2 cable.
Clean and dry the unit with a
dry cloth or paper. If
necessary, drain the unit by
tilting it.
Contact Amersham
Biosciences for advice.
Error symptom
Possible cause
Corrective action
18117273aa.book Page 27 Thursday, July 3, 2003 5:13 PM