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- Troubleshooting Guide: Alarms -
■ **LOW ALARM** text
is flashing and audible
alarm is present
(screen #90 on page 17)
■ **LOW ALARM** text
is flashing, audible alarm
is present and Level Display
reads "00.0 CM"
(screen #90 on page 17)
• Solenoid valve operating
erratically
• The LN
2
level in the vessel
has fallen below the pressure
sensing port
• Pressure sensing hose is
loose or disconnected
• Push STOP switch briefly and
listen for the fill solenoid
valve to “click”. This sound
is the valve operating. If the
“click” is heard and the
supply tank still has liquid
and pressure in it, there may
be an obstruction in the
valve or in the line.
If no “click” is heard, check
to see that the valve is
plugged in, and/or that
there is power to the outlet
which the valve is plugged
into. If power is present at
the valve and the FILL indi-
cator light is on, but the
vessel is still not filling with
liquid, the valve may be
defective.
• An automatic fill will begin,
and when the liquid level
rises above the LOW level
setpoint and the pressure
port, the alarm will subside
• Check pressure hose connec-
tions at both ends; a white
clamp should be in place at
each end of the hose
If hose appears loose, dis-
connect it, remove an inch
off the end and reconnect it
(If the vessel is holding liquid,
it may take some time to
read the corrected level)
CONDITIONS
CAUSES
SOLUTIONS
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