Waters Prep Series Installation And Maintenance Manual page 114

Consult your detector's accompanying documentation for additional
troubleshooting information and service procedures.
UV detector
The table below lists potential UV detector symptoms that can occur during
operation, along with possible causes and corrective actions.
UV detector troubleshooting
Symptom
"Unable to setup
detectors" message on
DIRECT CONTROL
screen
Deuterium source lamp
does not light
Unit will not calibrate
(due to low reference
energy)
3-30 Troubleshooting, Testing, and Maintenance
Possible cause
External detector not
calibrated
External detector
turned off after it has
been identified on the
bus
Faulty fuse
Lamp leads not
connected
Normal effects due to
lamp aging
Bad lamp power supply
board
Lamp aging
Reference side of flow
cell is dirty
Bad photodiode
Corrective action
Calibrate external
detector.
RESCAN using the
SYSTEM CONFIGURE
screen.
Replace fuse on lamp
power supply board.
Connect lamp leads.
Replace lamp.
Call Waters Technical
Service.
Replace lamp.
Clean flow cell.
Call Waters Technical
Service.