6 Troubleshooting
WARNING
Disconnect power. Always disconnect power from the instrument
before performing any maintenance task.
WARNING
Do not open the instrument. There are no user serviceable compo-
nents inside, and you can be exposed to high voltage.
CAUTION
Be sure to fold down the safety bar whenever the rack holder is
operated by hand. This blocks the rack holder from accidentally
moving while the rack is moved by hand or replaced. (Fraction
Collector Frac-950 only)
CAUTION
Only spare parts that are approved or supplied by GE Healthcare
may be used for maintaining or servicing the unit.
6.1 Faults and actions
ActionFault
•
Start a flow and start fractionation.
•
Select FeedTube from the menu SystemControl:Man-
ual:Flowpath. If the motor does not start and an error
appears, contact GE Healthcare.
•
Check the delay volume. A large delay volume at a low
flow rate generates a long delay time.
No tube change
Faulty parameters in UNICORN may be the cause.Tubes skipped
Frac-920 and Frac-950 Operating Instructions 28-9622-09 AC 49
6 Troubleshooting
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