LAB1ST LTF5P-310L User manual

Installation Operation
Manual
5℃Refrigerator

Section 1 Installation and Start-up
Installation Environment
➢Environment temperature: 5 ℃～28 ℃, do not exceed 32 ℃, the best
temperature is 18℃～25℃, please use air conditioning system if necessary.
➢Environment humidity: <80% RH. It shall be lower than 57% RH if the
highest work temperature is 32℃.
➢Avoid too much dust.
➢Avoid mechanical swing or vibration.
➢Work Elevation: <2000m.
➢Input Voltage: <220V±10%.
Installation Site
In order to ensure normal work and obtain best performance, the site for
installing the equipment shall meet the followings:
➢Do not install it in the small and closed space, the door of the room shall
not be less than this product for avoiding difficult repair and storage
objects damage when the equipment is fault.
➢Leave at least 30cm gap at four sides of the storage cabinet for ventilation.
➢The floor for installing the equipment must be smooth.
➢The site shall be well ventilated without direct sunlight.
➢Please do not share one socket with other equipment, ensure the plug
and socket are connected tightly.
➢Please do not twist or press the power cord.
➢To extend the power cord, the specification of the wire should be 230V~,
15A.
➢Please check the work voltage before use, take it into consideration to
use voltage stabilizer in the area with unstable voltage for assuring to
stabilize the input voltage at 220V-±10%, the power of the voltage
stabilizer shall >3kW.
➢Ensure reliable grounding for this equipment.
➢If the power socket is installed with grounding wire, please check the
grounding condition before use.

➢If the socket is not installed with grounding wire, please install grounding
wire by qualified technician.
➢Please install the independent overload and leakage protector at the
power supply terminal of the storage cabinet.
Choose Location
When the freezer is in position, set the front casters’brakes.
Note: The freezer must not be moved with the product load inside.
Note: For proper ventilation and airflow, a minimum clearance of 127mm
at the rear and top and a clearance of 203mm on the side of the freezer is
required. Allow adequate space in the front of the freezer for door opening.
Locate the freezer on a firm, level surface in an area with an ambient
temperature between 18°C and 32°C.
Provide enough room to reach the mains disconnect switch (power switch)
located on the rear of the freezer.
Install Stopper
a) Remove all packing materials and packing bag.
b) Install the stoppers at the rear side of the machine set.
Note: If tipped more than 45°, allow the unit to sit upright for 24 hours
before start.
Grounding

➢Please use power socket with grounding wire. If the socket is not installed
with grounding wire, please install grounding wire by qualified technician.
➢Do not connect this equipment with the ground through gas pipe, water
pipe, telephone wire or lightning rod because above mentioned grounding
will cause electric shock.
➢After installing, the power socket must be approachable for conveniently
unplug the power cord in emergency. Do not cover the air outlet of the -40
Freezer with any object.
Power On
Please follow below instructions step by step, for the first time to start up freezer:
a) Inspect external components to ensure they are not damaged.
b) For electrical specifications of the freezer, please refer to the unit
nameplate attached on the side of the freezer, or refer to the attached
electrical schematic diagram. Specified grounding system should be used.
Check the rated voltage on the nameplate to ensure that the power supply
parameters meet the requirements.
c) With the empty cabinet, connect the power cord plug to a specified socket.
d) After power on, if here is sound alarm, you can press the buzzer button to
mute the alarm sound. The light alarm continues to work until the
temperature reaches the setting data.
e) After checking the operation of the freezer, gradually put the items into the
cabinet.

Section 2 Instruction for Use
The Keypad Function
❖1.Cooling status indicator
❖2.Defrost indicator
❖3.Fan status indicator
❖4.Power indicator
❖5.Keyboard lock indicator
❖6.Door open indicator
❖7.Power switch
❖8.Setting
❖9.Increase
❖10.Decrease
❖11.Lamp switch
❖12.Mute
Notes:
❖Please do not change the settings during normal using.
❖Long press the power key will switch off the refrigerator. Long press the
power button again, the refrigerator will work again.
❖Long press the keypad lock key (combination of key 8 and 9) can lock the
keypad. The keyboard lock LED are lit, all the keys are locked. Then long
press the keypad lock again can be unlocked.
❖Press “Mute” to stop buzzing if necessary, but the alarm indicator and
code still display until the alarm disappear.

❖For special using, please contact our authorized service engineer before

adjust settings. Wrong operation may cause abnormal working of the device,
such as bad temperature uniformity and abnormal alarm.
Parameter Settings
When power on the medical refrigerator, the display screen displays internal
temperature value. To change setting temperature, for example, the original
set temperature is 2℃which now has to be adjusted to 5 ℃, please operate
according to the following steps:
Serial
Keys Operation
Display
No.
1
Displays the inside temperature
2
Press the key 8 for 3 seconds
Displays the initial set data is
2℃and twinkles
3
Press the key 9
Figure increases
4
Press the key 10
Figure decreases
5
Figure is 5℃
6
Press the key 8 for 3 seconds
Saves the user settings and
displays the inside temperature
Notes: If other parameter need to be changed, please contact after-sale or
local distributor of us for setting.
Temperature Query Settings
When normal working, press key 9 check high and low temperature record.
Such as current time is 9:20on the afternoon of Mar 15th, 2017 record the
high temperature of 6.7 ℃, at 15;23 record the low temperature of 3.9℃, and
the cycle. No operation is larger than that of 5S showed normal temperature.
The query is shown below:
NO.
key operation
Display
1
Display cabinet temperature
2
Press key 9
Display highest temperature6.7℃
3
Press key 9 again
Display HT date HD20
4
Press key 9 again
Display HT hour HH09
5
Press key 9 again
Display HT minute HE30
6
Press key 9 again
Display lowest temperature3.9
7
Press key 9 again
Display LT date LD20
8
Press key 9 again
Display LT hour LH14
9
Press key 9 again
Display LT minute LE25
10
Press key 9 again
Display highest temperature6.7℃
5

Notes: When normal display long press key 9 5s,to delete a record high and
low temperature data, check high and low temperature data at this time,
showing “00”,time display code +00,such as “HD00”.The current data
logging time interval is 10min, the default is 17:35 minutes to clear records
of high and low temperature data.
Time Query Settings
When normal working, press key 10 check time record, such as current time
is 08:20:21 on the afternoon of Mar 15th, 2017.
NO.
key operation
Display
1
display cabinet temperature.
2
Press key 10
Year Y_17
3
press key 10 again
Month N_03
4
press key 10 again
Date D_15
5
press key 10 again
Hour H_08
6
press key 10 again
Minute E_20
7
press key 10 again
Second S_21
Notes: When normal display long press key 10 5s, can adjust the current
time. Wen normal display, press key 10 5s,flickering display of Y_17,through
press key 9 or key 10 set current year, then press key 8 flickering display of
N_03,through key 9 or key 10 set the current month, repeat these steps after
you have set the time accordingly, long time press key 8 can save time
settings.
Alarm Code
NO.
Alarm code
Describe
1
AH
Sensor high temperature alarm
2
AL
Sensor low temperature alarm
3
AUF
Power failure alarm
After the power is switched off, the control function of the controller fails and
the back-up source is used for displaying. If the back-up source is charged for
more than 10 hours, the power failure symbol “AUF”, the current inside
temperature and the alarm display alternatively for one time and then display
again after 1min stop for cycle operation. After 8 hours, the nixie tube stops
displaying. The power failure alarm light will 5S twinkle continuously until the
electric quantity of the back-up source is used up. The inside temperature can
be continuously displayed during the power failure. Please pay attention to
this and take relevant measures to avoid damage.
6

Error Display
➢When faults of the refrigerator temperature display sensor including short
circuit, open circuit, malfunction and incorrect connection appear, “AD1S”
is displayed. When faults of the refrigerator temperature control sensor
including short circuit, open circuit, malfunction and incorrect connection
appear, “AS1S” is displayed. At the same time, the buzzer of the
temperature controller will give out alarm and the display screen displays
corresponding alarm parameters (AD1S、AS1S).
➢After the power is switched off, the control function of the controller fails and
the back-up source is used for displaying. If the back-up source is charged
for more than 10 hours, the power failure symbol “AUF”, the current inside
temperature and the alarm display alternatively for one time and then
display again after 1min stop for cycle operation. After 8 hours, the nixie
tube stops displaying. The power failure alarm light will 5S twinkle
continuously until the electric quantity of the back-up source is used up.
The inside temperature can be continuously displayed during the power
failure. Please pay attention to this and take relevant measures to avoid
damage.
➢Suggest: If you judge that the temperature sensor goes wrong, you should
cut off the power and first check whether the connecting wire of the sensor
is loose. Please contact professional after-sales service or distributor of us
for processing.
Notes: if internal code appears when user regulates the temperature
controller, the user should wait for 1 minute and then operate it till the
inside temperature is displayed to avoid fault of the medical refrigerator
caused by the changing of the control parameter.
➢When the medical refrigerator stops temporarily due to power failure or
other faults, the inside temperature of the medical refrigerator will rise
from -40℃to-30℃within 1 hour. If power cannot be supplied in short time,
the user should consider taking out the stored goods and putting them
into other normal medical refrigerators for storing to avoid losses caused
by the damage of the stored goods.
➢Before putting goods into the medical refrigerator to be stored, the user
7

should confirm in advance that whether inside temperature of the medical
refrigerator is in accordance with the set temperature for storing to avoid
losses caused by goods damage due to the improper temperature.
➢Due to the refrigeration inertia, the medical refrigerator cannot be kept at
constant temperature. And there is certain up and down difference
between the inside temperature and the set temperature. The inside
temperature varies with the changing of the environmental conditions and
the temperature setting. It belongs to normal phenomenon.

Section 3 Daily Maintenance
Clean the Storage Cabinet
➢Please clean the storage cabinet once a month. It can keep the new
appearance of the storage cabinet after periodical cleaning.
➢Wipe off dust from the enclosure and internal chamber and all
accessories of the storage cabinet. If the storage cabinet is very dirt,
please wipe off the dirt with soft fabric after immersing in PH-balanced
detergent, and then wipe off the remained detergent with wet fabric, and
then wipe with dry fabric. (Undiluted detergent may damage the plastic
parts. .Please refer to the instructions of detergent for diluting it.)
➢Do not directly pour water on enclosure of the equipment, otherwise, it
may possible damage the electric insulation and cause fault.
➢The compressor and other mechanical parts are under completely closed
state and don’t need lubricating.
➢Remove the frost or ice from the internal wall once a month.
Internal Wall Defrosting (Only for low temperature freezer)
Frost may keep on the rack in the cabinet and may possibly cause gap
between the cabinet body and door seal and drop the cooling effect, please
remove frost after disconnect power supply, the followings are the method for
defrosting through blanking the cabinet.
Notes: Please do not remove frost with toll of sharp edge such as knife
or screwdriver.
1. Take out the objects from the cabinet and store in other storage cabinets or
container with frozen liquid carbon dioxide.
2. Disconnect power supply.
3. Open the small doors, keep the external door open to defrost for a moment.
4. Remove the water from the bottom of the cabinet with dry fabric.
5. Start the storage cabinet after cleaning the cabinet body.
6. Put the objects into the completely refrigerated cabinet.

Section 4 Trouble Shooting
Please check the followings before notifying the repair technician if there’s
fault:
The Equipment Can’t Start
➢Check if power is correctly connected, if the main power switch is turned
on?
➢Check if the power voltage is too low?
➢Check if too much objects are stored in the cabinet?
Bad Cooling Performance
➢Check if the environment temperature is too high?
➢Check if the external door is closed? (Frost between the cabinet body and
door seal may possibly drop the sealing property of the door)
➢Check if the temperature is set correctly?
➢Check if the storage cabinet is far from direct sunlight?
➢Check if the storage cabinet is near the heat source?
➢If too much objects are stored in the cabinet within several hours? (Under
this condition, the problem is temporary, please rise the setting
temperature, stop and start the storage cabinet normally in a short moment
to gradually drop the setting temperature.)
Noise
➢Check if the storage cabinet is installed on the solid floor?
➢Check if the storage cabinet enclosure contacts any foreign object?
➢Check if the storage cabinet is working under low temperature state?
➢If there are too many objects in the cabinet which may cause high
temperature, the storage cabinet may make noises sometimes. And the
noise will drop as the temperature drops.
➢Check if the noise is from the compressor (the compressor noise of the low
temperature equipment is higher than the compressor of home appliances)
➢Knock noise. It may possibly cause by the acute cooling and contracting
of internal parts, please drop the temperature gradually for avoiding
sudden temperature drop in a short moment.

Section 5 Technical Data and Others
Product Sketch
LTF5P-310L
LTF5P-655L/1000L

LTF25-260L/320L, LTF40-260L/320L
Main Technical Parameters
Model
LTF5P-310L
LTF5P-656L
LTF5P-1000L
Climate Type
SN/N
Cabinet Temperature
2 ℃～ 8 ℃
Effective Volume
310L
656L
1000L
Rated Voltage
220V
Frequency
50Hz
Refrigerant
R600a
Outline
W
640mm
1220mm
D
582mm
642mm
872mm
Dimension
H
1880mm
1885mm
Model
LTF25-260L
LTF25-320L
LTF40-260L
LTF40-320L
Climate Type
SN/N
Cabinet Temperature
-10℃～-25℃
-30℃～-40℃
Effective Volume
260L
320L
260L
320L
Rated Voltage
220V
Frequency
50Hz
Refrigerant
R290
Outline
W
673mm
D
676mm
Dimension
H
1630mm
1886mm
1630mm
1886mm