3
Operation Direction
（
1
）
Function Introduction for Display Panel
1.
0
C
LCD code display window. The window displays the real-time internal
temperature of freezer with unit
℃
under
normal running condition, and displays different hint string under set condition:
（
Refer
follows for details
）
2.
“
Print”
：
This unit develops a function of automatically print the real-time
temperature data and manually print the latest seven days’ data
；
3.
“
Inspect/ Mute”
：
Press this key to stop alarm buzzing. Press this key to check time, the
number of door opening and alarm memory;
4.
“
▼
”“
▲
”
：
Function adjustment pads. Press these pads to realize different functions
combining with different function keys
；
5.
“
Setting”
：
Press this key to set the function adjustment parameter;
（
2
）
Initial Start-up
1.
Connect the power supply and switch the on-off on the back of freezer working
status
；
2.
“
Mute”
：
Press the “Mute”, the alarm buzzer switches to alarm-off status. Now,
the alarm buzzer will be closed under any error condition.
3.
Set temperature: the default temperature is set as 4
℃
in factory. Please don’t set any
other temperature value.
4. “LTL”
：
When the actual temperature in tank is lower than the low temperature limit
(LTL) setting, the window displays redness and system alarms to attract user’s notice
；
5. “HTL”
：
When the real temperature in tank is higher than the high temperature limit
5