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UF V (E3) 10/2020 Page 57/119
Condition Alarm message
Moment of Alarm message and
switching the zero-voltage relay
alarm output
Safety controller temperature sen-
sor defective
“Safety control sensor” immediately
Inner temperature sensor and
safety controller temperature sen-
sor defective. Refrigeration is
turned on permanently.
Temperature display
shows “- - - - “ or
“<-<-< “ or “>->->”
Messages alternating:
Inner temp. sensor and
Safety control sensor
immediately
Failure of Pt100 temperature sen-
sor on the condenser of the refrig-
erating machine. Refrigeration is
turned on permanently.
“Condensate temp.
sensor”
immediately
Failure of Pt100 temperature sen-
sor on the cascade of the refrigerat-
ing machine. Refrigeration is turned
on permanently.
“Cascade temp. sensor” immediately
Failure of Pt100 temperature sen-
sor for ambient temperature or air
intake of the 1
st
stage cooling (re-
frigerating machine). Refrigeration
is turned on permanently.
“Ambient temp. sensor” immediately
Chamber with options “battery-buff-
ered alarm system” and CO
2
emer-
gency cooling: Battery operation
(during power failure)
“Battery operation” immediately
Chamber with optional “battery-
buffered alarm system”: No battery
recognized. Cause: Battery missing
or defective. Message on line
power.
“Battery defective” immediately
Chamber with optional CO
2
emer-
gency cooling: activated CO
2
emer-
gency cooling automatically turned
on due to power failure and is run-
ning.
“CO2 emergency cooling”
immediately
Chamber with optional CO
2
emer-
gency cooling: Insufficient CO
2
sup-
ply of the activated CO
2
emergency
cooling system
“CO2 pressure” immediately
Power failure (chamber without bat-
tery or with message “Battery defec-
tive”)
-- immediately (alarm output only)
Press the OK button to confirm the alarm.
• Confirmation while the state of alarm persists: Only the buzzer is muted. The visual alarm message
continues to be displayed until the alarm condition is removed. Then it is reset automatically.
• Confirmation after the alarm has ended: The buzzer and the visual alarm message are rest together.
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