Waters 2998 - Page 71

General troubleshooting 4-9
Lamp light flashes red
and power light
constant green
Failed startup
diagnostic tests
Reseat and check
alignment of flow cell
(see page 3-5).
Flush the flow cell (see
page 3-4).
Dirty flow cell causing
shutter diagnostic test
to fail
Flush the flow cell (see
page 3-4).
Insufficient energy
reaching photodiode
array because of air
bubble
Flush the flow cell (see
page 3-4), or apply
slight backpressure of
207 to 345 kPa (2 to
3 bar, 30 to 50 psi) on
the detector waste
outlet. For example,
connect a 1- to 2-foot
(30- to 60-cm) length of
0.009-inch (0.23-mm)
ID tubing connected to
the detector waste
outlet.
Weak lamp Replace the lamp (see
page 3-7).
Shutter failure message Shutter failed 1. Clear bubbles from
the flow cell (see
page 4-7).
2. Power the PDA
detector off and on
again.
PDA detector troubleshooting (Continued)
Symptom Possible cause Corrective action