Instruction Manual
K SERIES Cryostorage System
IM: CryoCeK
Revision: 02
Approved by: CB
Page
84
of
87
Appendix I - ALARMS OVERVIEW
Alarm Name
Alarm Description Behaviour in
Alarm Condition
Attention
required
Priority Range Default Notes
High
Temperature
(TC1)
Thermocouple TC1
higher than pre-set
temperature
No change
Immediate
High
-80 to
-175°C
-130°C
Lid Open
Lid open for longer
than pre-set time
No change
Immediate
High
0-
30min
15 mins
Level Extra
Low
LN2 Level below
Ex Low Sensor
No Change
Prompt
High
N/A
N/A
Level Extra
High
LN2 Level at or
above Ex High
Sensor (Overfill)
H/w interlock
forces fill valve
off
Immediate
High
N/A
N/A
Can be caused
by mechanical
failure of valve.
Sensor Short
(Extra Low)
Sensor is short cct
or low resistance
(<10Ω)
Switches fill on
False Ex Low
Alarm
Prompt
High
N/A
N/A
Depending on
level condition a
false level may
be reported.
Sensors are low
resistance at
ambient but not
a known failure
mode.
Sensor Short
(Normal)
Switches fill on
Prompt
High
N/A
N/A
Sensor Short
(High)
Fill stays on once
triggered.
Prompt
High
N/A
N/A
Sensor Short
(Extra High)
Ex high not
reported
Prompt
High
N/A
N/A
Sensor Open
(Extra Low)
Sensor is open cct
or high resistance
(>60KΩ)
No change
Prompt
High
N/A
N/A
Depending on
level condition a
false level may
be reported.
Sensor Open
(Normal)
Vessel will not fill
until Ex Low
Prompt
High
N/A
N/A
Sensor Open
(High)
Vessel will not fill
Prompt
High
N/A
N/A
Sensor Open
(Extra High)
False extra high
alarm
Prompt
High
N/A
N/A
No LN2 Supply
(Fill Timer)
Failed to fill to high
level within pre-set
time limit
Fill switches off
or remains on
depending on
menu settings
Prompt
High
0 –
90min
60 mins
Thermocouple
Thermocouple is
Bad temperature
Prompt
High
N/A
N/A