Possible cause and actionProblem
•
The detector is not correctly fitted
Check that the detector is fitted correctly. See Sec-
tion 7.8.4 Replace the UV monitor U9-M flow cell, on
page 342 . If this error is recurrent, contact Service.
•
Unclean optical fiber connectors
Clean the connectors. See Section 7.8.4 Replace the
UV monitor U9-M flow cell, on page 342.
•
Dirt on optical sensors in detector
Remove visible dirt on detector photo diodes.
Use lint free lens paper winded around a thin wood
splinter (e.g a match or toothpick). Clean the sensors
with Isopropanol through the small hole of the metal
plate which covers the sensors. Dry the sensors with
clean and dry lint free lens paper.
•
Worn-out or broken lamp
Contact Service.
Too low UV lamp inten-
sity
•
Wrong wavelength for current buffer
Change wavelength or buffer.
•
Dirt in the UV flow cell
Clean the UV cell. See Section 7.5.1 Clean the UV flow
cell, on page 283.
•
Unclean optical fiber connectors
Clean the connectors. See Section 7.8.4 Replace the
UV monitor U9-M flow cell, on page 342.
•
Broken UV flow cell
Replace UV flow cell. See Section 7.8.4 Replace the UV
monitor U9-M flow cell, on page 342.
No light transmission
through the UV cell
•
Wrong wavelength for current buffer
Change wavelength or buffer.
•
Unclean optical fiber connectors
Clean the connectors. See Section 7.8.4 Replace the
UV monitor U9-M flow cell, on page 342.
Autozero out of accept-
ed range
364 ÄKTA avant User Manual 29035184 AE
8 Troubleshooting
8.3 Troubleshooting: Monitors
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