Detector Troubleshooting - Waters 2998 Overview And Maintenance Manual

4.2.4

Detector troubleshooting

Table 4–3:
Symptom
Both LEDs unlit
Change in reference spectrum Mobile phase contains gas or
Continuous audible tone
Detector not responding to
console
Lamp light flashes green and
power light constant green
2998 PDA detector troubleshooting
Possible cause
No electrical power
Open (spent) or defective fuse Replace fuse (see
is contaminated
Air bubbles trapped in flow cell Reseat and check alignment
Detector failure
Bad or disconnected cable
Configuration problem
The detector is initializing.
December 5, 2017, 715004753 Rev. B
Page 58
Corrective action
1. Inspect line cord
connections.
2. Test electrical outlet for
power.
page
Prepare fresh mobile phase,
and degas thoroughly.
of flow cell.
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.
Cycle power to the detector.
Inspect cable connections,
tighten connectors, or replace
cable.
Check Ethernet configuration.
For details, see Empower
online Help.
No corrective action required.
Wait until initialization
completes (both lights
constant green).
51).