Waters 2998, Обзор и руководство по обслуживанию

Страница: 59 / 94

December 5, 2017, 715004753 Rev. B
Page 59
Lamp light flashes red and
power light constant green Failed startup diagnostic tests Reseat and check alignment
of flow cell (see
page 49 ).
Flush the flow cell (see
page 47 ).
Dirty flow cell causing shutter
diagnostic test to fail Flush the flow cell (see
page 47 ).
Insufficient energy reaching
photodiode array because of
air bubble Flush the flow cell (see
page 47 ), 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 49 ).
Shutter failure message Shutter failed 1. Clear bubbles from the flow
cell (see page 57 ).
2. Cycle power to the
detector.
Solvent in drain line Leak from flow cell gasket Replace the flow cell (see
page 47 ).
Leak from flow cell inlet and
outlet fittings Check fittings for
overtightening or
undertightening, and replace
fittings if necessary.
Table 4–3: 2998 PDA detector troubleshooting (continued)
Symptom Possible cause Corrective action