Gambro COBE 2991, Справочник по основам

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Alarm Troubleshooting
This section describes probable causes and corresponding action steps for alarms.
Excess Pressure Alarm During Supernatant-Out
The EXCESS PRESSURE light comes on and the audible alarm sounds during the Supernatant-Out operation. To recover starting cell product from
the cell processing bag after an Excess Pressure alarm, see “Excess Pressure During Processing” on page 6-32.
Probable Cause Action
Cell processing set is pinched, kinked, or clamped. 1 Ensure that clamps are correctly positioned to allow fluid
expression.
2 Check the cell processing set for kinks and pinch points.
Low product volume in cell processing bag. The Excess Pressure
alarm is activated only during the early part of the Supernatant-Out
operation. After a certain volume of hydraulic fluid is pumped (50 to
100 mL), the Excess Pressure alarm is deactivated. 1 Verify the volume of cell product in the cell processing bag.
2 If the volume is 50 to 100 mL or less, consider increasing the
volume in the cell processing bag.
Misaligned seal weight. If the seal does not slide easily, it may be
misaligned or damaged. It is also possible that a seal weight from
another COBE 2991 was used. 1 Verify that the seal weight slides easily on the guide posts,
allowing the rotating seal to move freely.
2 Verify that the correct seal weight is being used.
3 Contact a qualified service representative to have the seal
weight alignment checked.
Air in hydraulic fluid path. Verify that the hydraulic system is primed. See “Checking Prime” on
page 6-35.