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Never remove the Degasser’s cover. There is nothing
inside that requires service or maintenance by the
customer
.
Smart Leak Detection
An additional benefit of maintaining a constant vacuum level is that a
potential leak in the vacuum degassing system can be observed by
monitoring the RPM of the pump. This “smart leak detection” is a benefit
of the patented design of the degasser. If a leak occurs within the
chamber, the microprocessor will increase the pump RPM in an attempt
to maintain the vacuum level. If the pump cannot maintain the vacuum
level (if it runs at an elevated RPM for more than 30 minutes), the yellow
LED will flash, indicating a possible leak condition, and the system will
shut down and go into a “safe” mode.
Troubleshooting
Table 5
Troubleshooting
Problem
Probable Cause
Solution
The connection cable (G0649) is
not plugged into the pump and
manager outlet.
Plug the connector cable into the
outlets.
Power switch is on, but all 3 LEDs
are off, indicating no power to the
degasser.
Blown fuse.
Contact your Service
Representative.
Orange INIT LED is on steadily,
pump is running and RPM seems
high.
Pump is in initial pump-down
phase or system’s degassing
demand has increased.
Typically normal operation,
although if pump speed continues
to rise for an extended period of
time (as heard by the pitch of the
stepper motor) it could indicate a
potential fault condition.
Orange INIT LED is flashing
approximately 1 second off, 1
second on. Vacuum pump is not
running.
Possible system leak.
Contact your Service
Representative.
Orange INIT LED is flashing
approximately 2 seconds off, 1
second on. Vacuum pump is not
running.
Possible sensor or control board
fault.
Contact your Service
Representative.
Is there a way to check whether
the system is operating correctly
when Power and Vacuum green
LEDs are illuminated, but pump
can’t be heard running?
Due to the design of the pump
and degasser, the pump is
virtually silent at low RPM, even
though vacuum is good and
degassing is normal.
Monitor the UV absorbance of
non-degassed methanol at 215
nm versus degassed methanol
coming through the degasser.
Proper performance of the
degasser should decrease the UV
absorbance of the methanol
significantly.
Bubbles appear through the output
tubing.
Loose fitting(s).
Tighten the input and output
fittings.
Air in the HPLC pump head.
Prime/purge the pump head.
No solvent flow.
If a buffer solvent was left in the
degasser for some time after use,
it may clog the degasser
elements.
Use a different channel, or
connect the channel to a beaker
of the solvent without the buffer.
Draw the solvent through the
channel to dissolve the buffer.
Do not push the solvent through
the channel. If this flushing action
does not work, contact your
Service Representative.
