Detector Troubleshooting - Waters ACQUITY UPLC Operator's, Overview And Maintenance Manual

Detector troubleshooting

Detector troubleshooting
Symptom
Both LEDs unlit
Change in reference
spectrum
Communication
problems
Possible cause
No power
Open (spent) or
defective fuse
Mobile phase contains
gas or is contaminated
Air bubbles trapped in
flow cell
Configuration problem
Improper or defective
Ethernet cable
Error messages and troubleshooting
Corrective action
1. Inspect line cord
connections.
2. Test electrical outlet
for power.
Replace fuse (see
page 59).
Prepare fresh mobile
phase and degas
thoroughly.
• Reseat and check
alignment of flow
cell (see page 45.
• Flush the flow cell
(see page 47), or
apply slight
backpressure on the
detector waste
outlet.
• Ensure the
backpressure
regulator is
connected to the
detector waste
outlet.
Check Ethernet or
MassLynx
configuration.
Replace the cable with
a shielded Ethernet
cable.
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