Waters ACQUITY UPLC Operator's, Overview And Maintenance Manual page 91

Detector troubleshooting (Continued)
Symptom
Status light blinks and
lamp light is on
Possible cause
Failed startup
diagnostic tests
Dirty flow cell causing
shutter diagnostic test
to fail
Insufficient energy
reaching photodiode
array because of air
bubble
Weak lamp
Error messages and troubleshooting
Corrective action
• Reseat and check
alignment of flow
cell (see page 45).
• Flush the flow cell
(see page 47).
Flush the flow cell (see
page 47).
To prevent air bubbles
from forming, check
that there is a 30- to
60-cm (1- to 2-foot)
length of 0.009-inch
(0.23-mm) ID tubing
connected to the
detector waste outlet.
Replace the lamp (see
page 56).
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