Gambro COBE 2991, Essentials Manual

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COBE 2991 C
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Troubleshooting
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Valve Does Not Move as Expected
A valve does not open or close, or stays open when the COBE 2991 is turned on.
The specific gravity of cell product or supernatant to be expressed is
higher than the specific gravity of the hydraulic fluid, causing the
flexible diaphragm to seal against the centrifuge bowl cover. This
prevents fluid from being expressed from the cell processing bag.
The specific gravity of the hydraulic fluid is approximately 1.07 ±.01
and is used to enhance the separation of white blood cells (WBCs)
and plasma from RBCs. To facilitate the separation of other types of
cells, adjustments may be made to the specific gravity of the
hydraulic fluid.
Contact a qualified service representative to have the hydraulic fluid
checked. See “Hydraulic Fluid” on page 1-9.
Internal malfunction. Contact a qualified service representative.
Warning:
Only trained technical personnel should open the front and
right panel doors. Only qualified service personnel should open the left and
rear panel doors. A special tool may be required to open the panel doors.
Probable Cause Action
Internal malfunction. Contact a qualified service representative.
Probable Cause (continued) Action (continued)