ULVAC CRYOGENICS INCORPORATED
33
Problem
Possible Cause
Corrective Action
(5) COMP.ALARM lights,
LN
2
production does
not start.
(The RUN/STOP
switch flickers as
well).
The voltage declines and
power supply falls short as
multiple devices run
simultaneously on one power
source.
Engage one power source
per one device. Fix the
power supply to meet the
specified value when it is not
sufficient.
The ambient temperature is
too high.
Ventilate well around
EMP-14A.
Keep the ambient
temperature below 35 °C by
installing fans or air
conditioners.
Electric parts of SA115-C
break down.
Please contact us.
SA115-C helium charge
pressure is lower than
specified.
Charge helium gas to the
appropriate pressure.
Contact us for more
information on charging.
(6)RUN/STOP switch
blinks and EMP does not
start LN
2
production
(Alarm light is not lit).
RUN/STOP switch is pressed
less than 6 minutes before.
Wait for 6 minutes until
GN-10i starts N
2
supply.
Condensation occurs in the
level sensor of EMP-14A.
Check the connection
between EMP-14A and
nitrogen generator, and flow
rate of nitrogen gas.
The level sensor needs to be
dried. Please contact us.
Level sensor of EMP-14A
break down.
Please contact us.
(7)Liquid Nitrogen cannot
be dispensed.
No liquid nitrogen such as at
the time of initial start-up.
(LN2 amount is displayed as
0 %)
Please wait until liquid
nitrogen accumulates.
Level sensor malfunctions
due to ice or frost in the
dewar.
Please contact us..
Solenoid valve failure
(Solenoid valve does not
make operating sound.)
Please contact us.
