4.5 Troubleshooting
Symptom Cause
Judgment/Check
Remedy
The power cord plug is
not securely plugged in.
Visual check
Plug in the power cord
securely.
The fuse is blown.
Check the fuse for
continuity.
Replace the fuse with a
new one. (Refer to
Section 6.3.)
Self-diagnosis
(initialization) is not
performed when the
POWER switch is
turned on.
The light source cover
is not properly attached.
(The cover activates a
safety interlock switch.)
Visual check
Retighten the retaining
screws of the light source
cover.
The keyboard
does not work.
The instrument is not
ready for operation.
Check the monitor
screen.
Press the ESC key.
The READY status will be
presented.
The
A/Z
key does
not work.
The display does not
present the 1st monitor
screen (FL indication).
Check the monitor
screen.
Return to the 1st monitor
screen (FL indication).
(Refer to Section 4.1.)
The time program
does not start.
The instrument is not
ready to operate.
Check the monitor
screen.
Press the ESC key.
The READY status will be
presented.
The xenon lamp is still
hot.
Turn on the lamp
again.
For turning on the lamp
again, wait at least 5
minutes after the Xe lamp
went out.
The xenon lamp
does not light.
The Xe lamp has
reached the end of its
useful life.
Check the
cumulative turn-on
time of Xe lamp.
Replace the Xe lamp with
a new one.
The flow cell is
contaminated.
Visual check
Clean the flow cell.
(Refer to Section 4.4)
The mobile phase is not
sufficiently degassed.
Spike noise occurs.
Degas the mobile phase
thoroughly.
The mobile phase
contains impurities.
Check the mobile
phase.
Purify the mobile phase, or
replace it with mobile
phase of a higher quality.
The gain level of the
recorder is too high.
Check the gain level
of the recorder.
Adjust the gain level of the
recorder.
Check to ensure the
operation of the
pump is smooth.
The pump is faulty.
Check for noise
when the pump is
stopped.
Check the pump.
Excessive noise
The xenon lamp has
reached the end of its
useful life.
Check the
cumulative turn-on
time of Xe lamp.
Replace the xenon lamp
with a new one. (Refer to
Section 5.2.1.)
4 - 31
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