Eppendorf New Brunswick -86 °C Freezers G - Manual (Page 35)

35
HEF® and G -86 °C Freezers — Operating manual
8.3 After a mains/power failure
If mains/power is interrupted, the POWER-FAIL indicator lamp (see Fig. 3 on p. 17), Item 3, will
illuminate. In addition, the audible alarm will sound and the display will flash at approximately
10-second intervals.
When mains/power is restored, both alarm and light will automatically be cancelled.
If mains/power has been interrupted for only a short time, the internal temperature of the freezer
will not have risen above the temperature setpoint (the user-set alarm threshhold), so normal
operation will be resumed immediately.
If the interruption was long enough for the internal temperature to rise above the temperature
setpoint, the TEMP-ALARM indicator will illuminate. If the internal temperature does not fall
below the temperature setpoint within the programmed time after mains/power was restored, the
audible alarm will sound again. The TEMP-ALARM indicator will extinguish when the internal
temperature reaches the High Alarm temperature set point.
8.4 Interior warming
If the lid or door is left open long enough for the internal temperature to rise above the
temperature setpoint, the same effects will be observed as described above regarding power
failure.
To minimize the risk of this happening, the lid or door should only be opened when necessary, for
a short period of time.
The upright freezers are fitted with internal doors which latch shut, minimizing temperature rise
when the outer door is opened. Chest freezers are fitted with inner insulating lids to ensure
efficient running of the freezer. The lids should remain fitted at all times when the freezer is
running. 8
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