© Global Cooling, 2009
10/29/2009
Version 1.2u
10
Changing the preset values
Many users will have protocols that specify temperatures such as -75º C,
etc
. The
Preset buttons allow users to quickly change the Set Point to those temperatures.
Changing the preset value does not change the Set Point itself. Only the value of the
preset is being changed. This means the
Set T
button is NOT pressed for this
procedure.
Press and hold one of the PRESET TEMPERATURE buttons
o
Use the
/
buttons to change the value of the preset button.
This value will be saved even if the freezer is turned off or powered off.
To change the Set Point to this new Preset value follow the instructions in the previous
section.
Min and Max Temperature
The freezer remembers the highest and lowest temperatures since being turned on or
since the min/max was last reset (min initially reads 0 until chamber T falls below 0).
o
Do not use Set Temperature mode (The
Set T
LED should be off)
o
Press
(
) briefly to see the Min (Max) temperature
o
To reset the Min/Max memory, simultaneously press both
and
Over Temperature Alarm
The freezer has an adjustable over and under Temperature Alarm mode. This alarm
can be activated whenever the freezer is on, even when the panel is locked.
o
If T
chamber
≥
15º C when the freezer is turned on, the Temperature Alarm is
automatically postponed for 3.0 hours to allow initial cooldown.
If the freezer compartment temperature is 10º warmer or colder
(adjustable, see below)
than the set point for 5 seconds then it will go into Temperature Alarm mode.
o
The
Over T
light will go on (this is used for under temperature alarms as
well).
o
The freezer will make a double beep every 10 seconds.
o
Situations which can affect the freezer’s ability to maintain a steady state or
cooling rate include:
The lid is ajar
The air vents are blocked
Addition of a large relatively warm mass
Power supply problems
Mechanical and/or electrical problems.
How to silence the audible Temperature Alarm
The
Over T
light will always be on when the cooler temp is over or under the set temp
by more than 10º C
(adjustable, see below)
.
The audible alarm can be silenced in two different ways
o
Postponed - The audible alarm will be silenced for an adjustable time period.
o
Silenced – it will be off until it is manually reset or the freezer is turned
OFF/ON
