Cryotherm BIOSAFE 120, Руководство по эксплуатации

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Faults
58
10.2 Possible Faults CHRONOS
®
Fault Cause Trouble
shooting
Level too low. The supply of liquid nitrogen is defective. Open the liquid
nitrogen supply.
Examine the level
and the pressure of
the store tank and
the function of the
valves.
Fault at the level control unit and vessel
control system BIOSAFE-CONTROL
®
ß
See separate op-
erating manual of
BIOSAFE-
CONTROL
® ß
Level too high, liquid nitro-
gen overflows, the cover
floats Supply of liquid nitrogen defective
Fault at the level control unit and vessel
control system BIOSAFE-CONTROL
® ß
Close the supply of
liquid nitrogen,
check the function
of the valves
See separate op-
erating manual of
BIOSAFE-
CONTROL
®
ß
Frost formation on the
vessel
Upper vessel edge thawed This is operational after refilling or cool-
ing-in.
Vessel is directly exposed to strong air-
flow
dry up, if necessary
avoid direct
blowing against the
vessel
Iced-up cover This is operational after frequent opening If necessary, re-
move the ice care-
fully
Outer vessel iced-up Loss of vacuum
The vessel is directly exposed to strong
airflow.
Examination /
Reevacuation by
the manufacturer
avoid direct
blow-against of the
vessel
Positive pressure relief
and seal-off device actuat-
ed, vessel extremely iced-
up Loss of vacuum / pressure inside the
vacuum room Empty out the ves-
sel / put it out of
operation
Examination / re-
pair at the manu-
facturer’s works