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14
Notes:
A flashing alarm light cannot be cancelled unless the root cause for the alarm is eliminated.
The buzzing alarm can be temporarily silenced for 30 minutes by pressing the alarm silence
button. However, if the problem is not fixed, the buzzer alarm will resume after 30 minutes.
The freezer is equipped with a rechargeable battery controlled by a power switch. Before
operating the freezer, this switch must be turned on. Once the unit is plugged into the
specified voltage, the unit operates to charge the battery. When there is a power outage, the
battery sustains the temperature display. If the battery voltage is less than a threshold, the
temperature display turns off. While the battery is still capable of providing power to the
display, the temperature display can be turned off by unplugging the power cord and turning
off the battery control switch.
The freezer is also designed to auto-adjust the inner temperature set point at high ambient.
When the ambient temperature is warmer than 32 and the set point temperature is set to be
lower than -82 , the set point temperature will automatically default to -82 . If the ambient
temperature is equal to or cooler than 32 , the set point will resume to the intended inner set
point. This feature extends the life expectancy of the freezer.
Buzzer alarm resumption after cancellation
Remote alarm terminals
When the unit is in the alarm mode, you may press the to stop the buzzing of
the alarm. However, the remote alarm cannot be cancelled. If the alarm condition still persists
after 30 minutes, the buzzer alarm resumes automatically.
Silence key
Remote alarm terminals are located in the machine compartment in the back of the unit. The
alarm signal is delivered via the terminals. The terminals are rated for 24 VDC at 1 A. The power
for remote alarm system must be connected with the wire or battery with UL certificate.
Under normal operating conditions, the terminals with wires are open. When the unit is in the
alarm mode, the two terminals with wires are in the closed mode. The following schematic is a
wiring diagram.
Terminal output
Remote alarm terminal with brown wire
Remote alarm terminal with blue wire
Connect with remote
alarm terminal with brown
wire
Connect with remote alarm
terminal with blue wire
DC power source
Alarm device
Display and Alarms
11
The procedure to change the freezer temperature is as follows.
1.In order to change the setting of the freezer, the freezer's control must be unlocked
first. The temperature display flashes when the up or down arrow is pushed. Push the
up or down arrow again to change the display to security code mode then enter the
initial value 06. Push the key for 5 seconds. The locking sign turns off. This
means the unit is in unlocked mode. Push the SET key again to select the mode for
the temperature set point value, high temperature alarm value and low temperature
alarm value. The matching indicator lights up as each function is chosen.
SET
2.Freezer temperature set point: Push the SET key. Once the Inner Temp.indicator
is on, the temperature set point area flashes. To change the temperature set point,
push the or key intermittently to increase or decrease the temperature
setting by 1 . After the adjustment is done, do not make any further changes for 10
seconds. The temperature display stops flashing. The unit enters the locked mode.
The temperature range is -10 to -86 .
3.Setting of high temperature alarm:Push the SET key to turn on the High Temp.
Alarm light. The temperature display flashes. To change the high temperature alarm of
the unit, push the or key intermittently to increase or decrease the
temperature setting by 1 . After the adjustment is complete, do not make any further
changes for 10 seconds. The temperature display stops flashing. The unit enters the
locked mode. When the freezer temperature is warmer than the high temperature
alarm set point, the unit's alarm sounds, and the high temperature alert light flashes.
High temperature alarm set point can only be set to a value of at least 5 warmer than
the set point temperature of the unit. The high temperature alarm value cannot be set
to exceed the maximum limit.
4.Setting of low temperature alarm: Push the SET key to turn on the Low Temp.
Alarm light.To change the high temperature alarm of the unit,push the or
key intermittently to increase or decrease the temperature setting by 1 . After the
adjustment is complete, do not make any further changes for 10 seconds. The
temperature display stops flashing. The unit enters the locked mode. The low
ULT FREEZER
Alarms
SET
Silence
V
-80
Run
Voltage Regulator
Temperature Adjustment and Setting