Vacc-Safe VS-86L458 User manual

USER MANUAL
EN
version:002-6-2020
Warning:
Before using this product,
please read this manual carefully
and keep it for future reference.
The design and specifications
are subject to change without
prior notice for product
improvement. Consult with your
dealer or manufacturer for
details.
Product implementation stardards:
EN 61010-1 ：2010/A1:2019
EN 61010-2-011:2017
EN 61326-1 :2013
VS-86L568
VS-86L718
VS-86L838
Model:VS-86L458
ULT FREEZER

Table of Contents
Safety warnings ---------------------------------------- 1
Product Features -------------------------------------- 7
Precautions for Use ---------------------------------- 8
Product Installation -----------------------------------11
Product Components and Overview ------------- 12
Operating Instructions ------------------------------- 13
Alarm Description ------------------------------------ 15
Maintenance ------------------------------------------- 16
Troubleshooting and Repairs --------------------- 18
Specifications ---------------------------------------- 19
Packing List ------------------------------------------- 20
Electrical Schematic Diagram ------------------- 20
Service Guide ------------------------------------------- 22

1
Safety
WARNING: The packaging base at the bottom of this series of products must
be removed before use.
WARNING: When moving this series of products, take care that the bottom foot
does not touch the power cord.
WARNING: The bottom front wheel brake of this series of products need to be
locked after moving to the designated position.
WARNING: This series of products need to be left to stand for 24 hours before
initial power-up.
WARNING: When this series of products are just connected to the power supply,
do not immediately put the items in to it. After running for a period of time, when
the temperature inside the ULT freezer drops to the set temperature, then put
the items in batches.
Note: A single batch of items put into the ULT freezer can not exceed 1/3 of the
volume.
WARNING: Keep all ventilation openings in the enclosure or, in the structure for
building-in, clear of obstruction.
WARNING: Do not use mechanical devices or other means to accelerate the
defrosting process, other than those recommended by the manufacturer.
WARNING: Do not damage the refrigerant circuit.
WARNING: Please use grounded power outlets to prevent electric shocks.
Ungrounded power outlets must be connected with grounding wires by
professional technicians.
WARNING: This ULT freezer must be firmly placed on a solid and flat ground
and proper care is taken to prevent overturning.
If the floor is not level or the ULT freezer is placed in an improper location, the
ULT freezer may fall down and cause injuries.
Safety Warning Signs
Warning Watch Your
Hand
Electrocution
Hazard!
Combustible
Material
8
warnings

2
WARNING: In case of leakage of gas and other flammable gases, open the
doors and windows to ventilate and exhaust gas. Do not plug or unplug the
power plug of the ULT freezer, otherwise it may cause an explosion and fire.
WARNING: Only professional technicians or maintenance personnel for
after-sales support can disassemble and assemble the ULT freezer. Otherwise,
it may electric shocked to cause a fire.
WARNING: Please use the special power supply indicated on the nameplate of
the ULT freezer, otherwise it may cause a fire or electric shock.
WARNING: The power cord of this ULT freezer is equipped with a three-prong
(grounded) plug to mate with a standard three-prong (grounded) outlet of 16A.
Never remove the grounding pin of the power cord. Make sure that the power
plug and the outlet are connected firmly and reliably, otherwise it may cause a
fire.
WARNING: When removing the plug from the power socket, you should hold
the power plug instead of pulling the wire of the power plug. Otherwise, it may
cause electric shock or fire due to short circuit.
WARNING: If the ULT freezer is not operating properly, unplug the power plug.
It may cause an electric shock or fire if the ULT freezer continues to operate
under abnormal conditions.
WARNING: Before any repair or maintenance of the ULT freezer, always
disconnect the ULT freezer from the power supply to prevent electric shocks or
personal injuries.
WARNING: Make sure that the drugs or suspended particles inside and around
the ULT freezer will not be inhaled during repairs and maintenance, otherwise it
may cause harm to human health.
WARNING: When storing toxic, harmful, or radioactive substances, please use
the ULT freezer in a safe area. Improper use may cause harm to human health
or the environment.
WARNING: Disconnect the power plug when the ULT freezer is not in use for a
long period, so as to prevent electric shock, electric leakage, or fire due to the
deterioration of the power cord.
WARNING: If the ULT freezer is to be stored unused in an unsupervised area
for a long period, ensure that children do not have access to the ULT freezer.

3
The disposal of the ULT freezer shall be accomplished by the appropriate
personnel. Remove doors to prevent accidents such as suffocation.
WARNING: If CO2/LN2standby system is used, a good ventilation environment
must be provided at the installation and use site.
WARNING: Increased carbon dioxide concentrations in the air can asphyxiate
and endanger life safety. In case of poor ventilation, other methods must be
considered to ensure a safe environment.
WARNING: Do not leave the plastic packing bags in a place where they can be
reached by small children as this may result in suffocation accidents.
WARNING: Do not climb on the ULT freezer or put any objects on the ULT
freezer, otherwise the ULT freezer may fall and cause injuries or cause damage
to the ULT freezer.
WARNING: Do not use the ULT freezer outdoors. Exposure to rain may cause
an electric leakage or electric shock.
WARNING: Do not place the ULT freezer in a humid location or a place where
the ULT freezer is easy to be splashed with water. Otherwise, an electric
leakage or electric shocks may be caused by the deterioration of insulation.
WARNING: Do not pour water directly onto the ULT freezer, otherwise it may
cause an electric shock or a short circuit.
WARNING: Never disassemble, repair, or modify the ULT freezer yourself.
Otherwise, fire or personal injuries may be caused by improper operation.
WARNING: Do not connect the grounding wire to a gas pipe, power supply pip,
telephone line, or lightning rod when grounding the ULT freezer. The above
grounding methods will cause electric shocks or other hazards.
WARNING: Do not touch any electrical parts such as the power plug or operate
any switch with a wet hand, otherwise it may cause an electric shock.
WARNING: Do not put water containers or heavy objects on the ULT freezer.
Falling objects may cause personal injuries and spilled water may cause the
insulation to be reduced and result in an electric leakage or electric shock.
WARNING: Never insert metal objects such as iron nails and wires into any
vent, gap, or air outlet on the ULT freezer. This may cause electric shocks or
injuries by accidental contact of these objects with moving parts.

4
WARNING: It is not allowed to tie, drag, pull, wind and bind the power cord, or
damage the power cord plug. Damaged power cords or plugs may cause fire or
electric shock.
WARNING: The power cord with a loose plug is not allowed, because it may
cause fire or electric shock.
WARNING: It is not allowed to put glass bottles or canned items in the ULT
freezer, which may be frozen and cracked, causing injury to personnel.
Refrigerant and cyclopentane foaming material used for the appliance are
flammable. Therefore, when the appliance is scrapped, it shall be kept away
from any fire source and be recovered by a special recovering company with
corresponding a qualification other than being disposed of by combustion, so as
to prevent damage to the environment or any other harm.
IMPORTANT:
Flammable gas and refrigerant used. It is the consumer’s responsibility to
comply with Federal and Local regulations when disposing of this product.
Suggestion: Cut off the pipeline and drain the refrigerant without any open fire
around.
The product with the symbol reads "warning terms";
The product with this symbol reads “prevent fire, stay away from fire sources";
The product with this symbol reads "cyclopentane blowing"
Power supply voltage: This series of products use 220V-240V/50Hz AC power
supply, if the use of voltage lower than 198V or higher than 264V, need to add a
suitable automatic voltage regulator with the use(5kVA).
Use of this series of products requires a low-voltage air circuit breaker and
earth leakage protection device for the power supply.
A special power socket must be used and reliable grounding must be carried
out, and the length of the power line must not be arbitrarily extended. If
extensions are required, copper-core conductors with a cross-sectional area of
2.5mm2or more must be used, and copper-core conductors in the wall
connected to the power socket must also have a cross-sectional area of 4mm2
or more.
This series of products are strictly prohibited to put into flammable, explosive

5
dangerous goods and strong corrosive acid, alkali and other items;
The keys of this series of products need to be properly stored to avoid
accidents when children get them and open the door to play;
Do not connect the neutral wire (N terminal) and the ground wire (E terminal) of
the power socket together, otherwise it can cause the shell of this series of
products to be charged and an electric shock accident can occur;
The power cord cannot be bundled and used, cannot be pressed under heavy
objects, and cannot be close to heat sources such as compressors.
When it needs to restart the ULT freezer after the ULT freezer is unplugged or
the power to the ULT freezer is interrupted, check the settings of the ULT
freezer.
Items stored inside the ULT freezer may be adversely affected if the operation of
the ULT freezer is resumed with changed settings.
If the ULT freezer is unplugged or the power to the ULT freezer is interrupted,
do not restart the ULT freezer for at least 5 minutes to avoid damage to the
compressor or system.
The filter screen shall be checked in time and cleaned. Dust-laden filter screens
can cause temperature rise or failure in the ULT freezer.
If the power plug has dust, it needs to be cleaned in time. Improper connection
or plug filled with dust may cause heating or ignition.
After the power is cut off or the power switch is off, the set point shall be
checked when the power switch is restarted; otherwise, the stored items may
be damaged due to setting change.
Wear gloves during maintenance to avoid personal injuries caused by touching
sharp edges or corners.
The stored items shall not be contacted directly by hand. Direct contact with the
frozen items or the inner wall of the ULT freezer without gloves may cause
frostbite.
Close the door by holding the handle to prevent fingers from being pinched.
Tilt the ULT freezer for 45° when handling or moving it.
Be careful not to trip over the ULT freezer when handling the ULT freezer, so as
to prevent damage to the ULT freezer or personnel injuries.
Do not use door handles to lift or carry equipment to prevent damage to the ULT

6
freezer or personnel injuries.
Do not use electrical appliances inside the storage compartment of the ULT
freezer, unless they are of the type recommended by the manufacturer.

Product Features
This product is mainly used to preserve drugs, vaccines and reagents.
It is applicable to hospitals, epidemic prevention stations, universities, scien-
tic research institutes and electronic chemical industry enterprise labs.
Product Function
Precision temperature control Data traceability
• Computer temperature control, with a display accuracy of 0.1°C
• The temperature in the ULT freezer is uniform and controllable, the tem-
perature range is adjustable to -86°C~-40°C, and the temperature control is
accurate
• Standard USB port and traceable temperature data; query and save tem-
perature data at any time
Efcient refrigeration Effective thermal insulation
• Imported compressor has the self-overlapping refrigeration and strong
refrigeration capacity, and is safe and reliable
• High-performance VIP thermal insulation layer has the good thermal insu-
lation effect
• Multi-layer 3D seal design effectively reduces refrigerating capacity loss
and frosting
Multiple alarms Safety and stability
• Ideal function of audible and visual alarms to realize functions such as
alarms for high and low temperature, power failure, and sensor fault; us-
ers may set the alarm temperature as needed
• Design of safety door lock improves the safety level of sample manage-
ment
User-friendly design
• Adjustable shelf design ensures storage space available as required
• The LED touch screen can be confgured, with OTA function, displaying
the temperature inside the ULT freezer and ambient temperature, and set-
ting the high and low temperature alarm values and the ULT freezer tem-
perature values as required, with the function of fault warning and early
warning.
Note: The above features are not available for all models of products, and the detailed congura
-
tion shall be subject to the specic functions of each model.
Due to the continuous optimization of the product, the product you obtained may not be
exactly consistent with the instructions. We sincerely apologize for this.
The contents of the manual are subject to change without prior notice.
7

Precautions for Use
★When the ULT freezer is running, the contact part between the front of the ULT
freezer and the outer door may be heated, which is not a fault. In order to prevent
condensation around the ULTfreezer housing, the heating condensate pipe is
installed.
★Before storing items in the equipment, check that the temperature in the storage
compartment reaches the set temperature and then store the items in batches. The
volume of each batch of items to be placed in the ULTfreezer shall not exceed 1/3
of the volume inside the ULT freezer to prevent excessive temperature rise.
★The displayed equipment temperature is the temperature at the temperature sensor
in the storage compartment. There is a certain difference between the temperature
displayed at the beginning of the operation of the equipment and the actual tem-
perature in the center of the equipment, but as the equipment enters a stable state,
the displayed temperature will gradually approach the actual temperature.
★An inspection hole is installed on the enclosure of the equipment to pull out the
testing line in the ULT freezer during the testing. After the testing line is pulled out,
it is necessary to plug the testing hole again with thermal insulation material, oth-
erwise the temperature in the ULTfreezer may not reach the set temperature and
cause condensation around the outside of the hole (applicable to ULT freezers with
testing holes).
★Please clean the equipment with a diluted neutral detergent.Do not use brushes,
acids, gasoline, soap powder, polishing agents, or hot water for cleaning, otherwise
the painted surface and plastic rubber parts may be damaged. Pay extra attention
to not wipe plastic and rubber parts with volatile solvents such as gasoline.
★When the ULT freezer is not in use for a long period, cut off the power supply and
turn off the battery switch.
★If the ULT freezer is not started again for a long time, a low battery level may occur.
After the battery switch is placed at "ON", the battery can be charged, and the ULT
freezer can run continuously for about one week to charge the battery (applicable
to models with batteries).
★Please minimize the time of opening the door during each access to the items, so
as not to cause great uctuations in the temperature and humidity in the ULT freez-
er.
★After the door is opened, the temperature in the ULTfreezer will rise sharply in a
short time, which is normal, and it will return to set temperature of normal operation
after the door is closed.
★After the ULTfreezer has been running for a period of time, a layer of frost is
formed on the inner wall and inner door of the ULT freezer. If the frost layer is too
thick, it will affect the thermal insulation effect of the ULT freezer and increase the
power consumption. Therefore, after the frost layer reaches 5 mm, the attached
shovel shall be used to defrost.
★Before defrosting, the frozen items in the ULTfreezer shall be taken out with ice
items due to teperature rise in the ULT freezer.
★There are many refrigerating coils behind and on the side of the inner wall. The
frost from the inner wall shall not be removed by sharp tools such as knife, ice
chisel or screwdriver. The inner wall shall not be scratched during defrosting, or the
ULT freezer will fail.
8
shovel and put in an suitable environment for storage, to not demage the

Product Installation
Installation Environment
★Ambient temperature: 10 °C~32 °C; ideal temperature: 18 °C~25 °C; air
conditioning system shall be used if necessary.
★Ambient humidity: less than 80%Rh. The humidity shall be less than 60%
Rh if the maximum operating temperature is 32 °C.
★Avoid large amounts of dust.
★
Avoid mechanical sway or vibration.
★
Altitude of working position of ULT freezer: lower than 2000m.
★
Input voltage: 220V 240V, with a fuctuation within 10%.
★The ULT freezer is sensitive to ambient temperature. If installed in an en-
vironment other than the above, the ULT freezer cannot operate normally.
Please improve the environment before use.
★Do not install the ULT freezer outdoors. Exposure to rain may cause an
electric leakage or electric shock.
★Transportation and storage conditions: Ambient temperature -40°C~+55°C,
humidity 10~90% Rh
Installation Location
★It shall not be installed in a narrow and closed space. The door body of
the room where the ULT freezer is placed shall not be smaller than or
lower than the ULT freezer, or at least the normal access of the equipment
shall be ensured, so as to avoid maintenance difculties in the event of
equipment failure and causing damage to the stored items due to failure
of repairing the equipment in time.
★The oor on which the ULT freezer is installed must be sturdy and at,
non-ammable, and capable of bearing the weight of the equipment
during operation.
★The ULT freezer shall be installed in a well-ventilated location and not
exposed to direct sunlight.
★Each ULT freezer shall be provided with an independent power outlet.
Please ensure that the outlet is capable of bearing a current ≥ 16A, and
the plug is rmly connected with the outlet. The power cord shall not be
twisted or pressed.
★Check the operating voltage before use. A voltage stabilizer suitable for
the equipment load shall be considered to be used in areas with unstable
voltages for voltage stabilization, and the power of the voltage stabilizer
shall be greater than 4000W to ensure that the requirements for the input
voltage in the installation environment are met.
★The equipment shall be reliably grounded. If the power outlet is ground-
ed, check whether it is properly grounded before use. If the outlet is un-
grounded, it must be grounded by professional engineering technicians.
WARNING ★Do not connect the grounding wire to a gas pipe, water
pipe, telephone line, or lightning rod when grounding the
unit, otherwise it may cause an electric shock.
★After installation, the power plug must be accessible to
facilitate timely unplugging of the power cord in case of
emergency. Do not block the vent of the ULT freezer.
9
★
★~
Pollution level: 2.
Over-voltage level: II, Capacitance: 5KVA, IPX0.

CAUTION ★As the ambient temperature has a great impact on the
equipment, if the above environmental requirements
cannot be met, the equipment may not operate normally.
Please improve the environment before using the equip-
ment. The equipment operates intermittently.
Preparation before Use
1 Remove all transport packaging materials and belts.
2 Check the accompanying accessories. Please check the items in the box
with reference to the packing list. If there is any discrepancy, please con-
tact for after-sales service in time.
3 The placement conditions shall be such that clearances of at least 30cm
are reserved around the ULT freezer for ventilation and heat dissipation.
4 Rotate the horizontal supporting feet clockwise with a wrench or manually
to extend downward so that they are supported on the ground to ensure
that the ULT freezer does not move when used.
5 Open the outer door by more than 90°, take out the shelf from the bottom
of the ULT freezer, remove the shelf protective lm, and place the shelf
one by one on the shelf support strip.
WARNING ★Do not leave the plastic packing bags in a place where
they can be reached by small children as this may result
in suffocation accidents.
Initial Start
When using the equipment for the rst time, please follow the following steps:
1. After the equipment is placed, leveled and cleaned, keep the ULT freezer
still for more than 24 hours before connecting it to the power supply, so as
to ensure the normal operation of the equipment.
2. Connect the power cord to a dedicated outlet of suitable specication un-
der no load condition.
3. After the power supply is turned on, turn on the power switch of the equip-
ment rst; if the equipment is equipped with a battery, turn on the battery
switch again (at the bottom of the rear side of the ULTfreezer).
5. Set the required temperature, do not put anything in the empty ULT freez-
er, power on and start up, check whether the operating temperature of the
equipment reaches the required temperature, observe the normal startup
and shutdown of the equipment for more than 24 hours, and demonstrate
that the performance of the ULT freezer is normal.
6. Please store the items in batches, with the volume of each batch of items
to be placed in the ULT freezer not exceeding 1/3 of the volume inside the
ULT freezer. Ensure that the equipment is shut down and operates nor-
mally after being switched on and off for more than 8 hours before placing
the next batch of items.
7.The door opening shall be minimized during the cooling process, other-
wise the temperature will rise.
4.Set time parameter after the power supply is turned on.
10

Operation after Power Failure
The set value is memorized by the equipment. After recovery from a power
failure, the equipment will resume operation with the setting parameters be-
fore the power failure.
WARNING ★If the ULT freezer is unplugged or the power to the ULT
freezer is interrupted, do not restart the ULT freezer for
at least 5 minutes to avoid damage to the compressor or
system.
CAUTION ★When the ULT freezer is not in use for a long period,
unplug the power plug and turn off the battery switch (ap-
plicable to ULT freezers with batteries) to prevent electric
shock, electric leakage, or re due to the deterioration of
the power cord.
★If the ULT freezer is to be stored unused in an unsuper-
vised area for a long period, ensure that children do not
have access to the ULT freezer and that doors cannot be
closed completely.
• The product shall be managed by a specially-assigned person to
check the operation and make records every day (it is recommend-
ed to record the inspection once every 2~4 hours). In case of fail-
ure or shutdown, the temperature in the ULT freezer will rise. If it
cannot be repaired in a short time, the articles shall be transferred
to other places that meet the temperature requirements for storage
to avoid damage to the articles.
• This product is a ULT freezer. Please conrm in advance that the
temperature required for the stored articles is consistent with the
temperature range of the ULT freezer to avoid damage to the stored
articles due to mismatch of the temperature range.
• Due to the inertia of refrigeration, there is a certain difference be-
tween the displayed temperature and humidity of this product and
the actual temperature and humidity inside the ULT freezer, which
is normal.
• Since all ULT freezers are storage equipment, it is strictly prohibited
to put too many relatively hot items at one time, which will cause
the compressor to not stop for a long time, the temperature will
drop slowly and affect the service life of the compressor. The items
must be put in batches to allow the temperature to decrease by
steps until the required temperature is reached!
• Do not damage the refrigerating circuit.
• Do not use electrical appliances without production permits inside
the ULT freezer.
• No mechanical tools or other means without the manufacturer's
permission shall be used to accelerate the defrosting process.
11

Product Components and Overview
Schematic diagram of appearance
Due to the improvement of products and different models, the actual products
may be different from the schematic diagrams. The actual conguration will
depend on the physical product. The schematic diagrams are only for the
description of functional parts.
Universal
wheel
Door
Control
panel
Exterior
door handle
12

Operating Instructions
Display panel
Description of buttons and icons
Button 1 - Up; Button 2 - Down; Button 3 - Setup/Mute.
Icon 4 - 485 communication; Icon 5 - Button locking; Icon 6 - Compressor
startup; Icon 7 - Power-on; Icon 8 - Door opening; Icon 9 - Alarm silence; Icon
10 - Abnormal power supply; Icon 11 - Low battery level (all above are on)
Operation instructions
1. Check the ambient temperature
In the lock status of the keypad, press the "Setting/ Mute Multi-function Key"
to display the ambient temperature on the LED segment display. Wait for 5
seconds without any keypad operation or press the "Up" or "Down" keys to
return to the normal display.
In the unlock status of the keypad, press the "Setting/ Mute Multi-function
Key" to display the ambient temperature on the LED segment display. Wait
for 5 seconds without any keypad operation to return to the normal display.
2. Mute the alarm
When the alarm sounds, you can press the "Setting/ Mute Multi-function Key"
to mute the alarm; then it will enter the status for checking the ambient tem-
perature.
When the alarm is muted, you can press the "Setting/ Mute Multi-function
Key" to restore the alarm sound; then it will enter the status for checking the
ambient temperature.
In the unlock status of the keypad and the status for checking the ambient
temperature, you can press the "Setting/ Mute Multi-function Key" to mute or
restore the alarm sound.
3. Function of keypad lock
When the button is not locked, if there is no button operation for 60s or
the Up and Down buttons are pressed at the same time for 3s (the buzzer
sounds twice when the button is locked), the button is locked. In the button
locked state, the ambient temperature and mute can be viewed, the rest of
the button functions are locked, and the buzzer sounds twice during opera-
tion;
After pressing the Up and Down buttons at the same time for 3s, the digital
tube will display "0000′′. Adjust the password to "5′′ through the Up and Down
buttons. After the password is correct, return to the normal display, and the
buzzer will sound once.
13

4. Parameter setting
When the button is not locked, press and hold the Setup/Mute button for 3s,
and the digital tube displays "PS1". Press the Setup/Mute button to switch the
menu and corresponding parameters, and press the Up and Down buttons
to select the menu or adjust the parameters. Save the parameters after no
button operation for 60s or by pressing and holding the Setup/Mute button for
3s, and exit with the buzzer for one sound.
Every time when the pharmacy refrigerator reconnected to power after a power
failure, display automatically shows 1、2、3、4、5、6、7、8、9、n in turn,
users can set parameters as in below table while n is displayed.
Menu Menu description Setting range Default Unit
Set Temperature setting -86.0~-40.0 -81.0 °C
HUpper deviation for alarm of high
temperature 0.0-10.0; 0: Cancel the alarm 10.0 °C
LLower deviation for alarm of low
temperature 0.0-10.0; 0: Cancel the alarm 10.0 °C
n Set the current time - year -- -- /
y Set the current time - month -- -- /
r Set the current time - day -- -- /
s Set the current time - hour -- -- /
F Set the current time - minute -- -- /
PT Print interval 0~240 20 min
tH1 Alarm value of high temperature in
ambient temperature 20.0~80.0 36.0 °C
Ps1 User menu password setting 0-9999 5 /
b1 Hardware version -- 2.0 /
b2 Software version -- 2.1 /
”Year”setting example
Steps Operation Display shows
1
2
3
4
5
Display shows n n
Press Set/Mute key
Press Up key, Down key to change parameter to targeted year
Press Set/Mute key
Press Set/Mute key 3s to save parameter and quit
”Month”setting example(other r,s,F,Pt,SCY setting refers to this example)
Please finish setting in 2 minutes, it will automatic quit and shows normal if no
operation.
Steps Operation Display shows
1
2
3
4
5
Display shows n n
y
Press Set/Mute key
Press Up key, Down key to change parameter to
targeted month
Press Set/Mute key 3s to save parameter and quit
Press Up key, Down key to choose settable parameter"y"
14

5. Export of USB temperature data
the data of the current and the last months will be generated and imported
will buzz once, the screen will display "End" and return to normal display after
6s.
Alarm Description
S/N Alarm
codes Meaning Triggering conditions
1 H1 Alarm for high temperature
inside the ULT freezer
An audible and visual alarm is given when the temperature
inside the ULT freezer exceeds the alarm threshold for excessive
temperature.
2 L1 Alarm for low temperature
inside the ULT freezer
An audible and visual alarm is given when the temperature inside
the ULT freezer exceeds the alarm threshold for too low tempera-
ture.
3 H2 Alarm for high ambient
temperature Ambient temperature is above 36°C
4 H3 Alarm for high condenser
temperature
-
denser fan fails
5 Do Door opening alarm The outer door is opened for more than one minute
6 PF Power-off alarm Equipment loses power
7 bL Low battery alarm The battery capacity is too low or the battery warning switch is
8 E1~E4 Alarm for sensor fault The temperature sensor, ambient temperature sensor or con-
denser sensor in the ULT freezer fails.
9 Er USB data recorder fault
alarm
When the recorder is not shielded, the digital tube displays Er
when the recorder is not connected;
10 Pr
11 LoF Recorder not started
In the unlock status of the keypad and when the recorder is not
You can press the "Setting/ Mute Multi-function Key" and "Up"
key for 3 seconds at the same time and the screen will stop
displaying "LoF".
15

Maintenance
WARNING
★Always cut off the power supply before any repair and maintenance of the
equipment to prevent electric shocks or personnel injuries.
★Make sure that drugs or suspended particles from the surrounding envi-
ronment will not be inhaled during equipment maintenance. Otherwise it
may cause harm to human health.
CAUTION
★Do not spray water directly on the ULT freezer, in case the insulation per-
formance of electrical components decreases and metal parts get rusty.
★Do not clean the ULT freezer with hot water, corrosive detergent, or organ-
ic solvent, etc.
★Do not put heavy objects on top of the equipment in case it deforms under
pressure.
Cleaning of ULT freezer
The ULT freezer should be cleaned once a month. Regular cleaning keeps
the ULT freezer a brand-new appearance.
Wipe the dust off the ULT freezer's shell, inner chamber, and all accesso-
ries with a dry cloth. If the ULT freezer is dirty, wipe it with a cleaning cloth
soaked with a neutral detergent to remove the dirt and wipe off the residu-
al detergent with a wet cloth. Then, wipe it with a dry cloth again.
Do not pour water onto the ULT freezer shell or into the ULT freezer. Oth-
erwise, it may damage the electrical insulation, leading to a failure.
The compressor and other mechanical parts are completely sealed and
do not need lubrication.
Clean the frost or ice on the inner wall and the condenser lter screen
once a month.
Cleaning of condenser lter screen
The lter screen shall be cleaned once a month under normal use. If the lter
screen is blocked, the refrigeration effect of the ULT freezer will be affect-
ed and the service life of the product will be reduced. Please clean the lter
screen as follows. Do not move the sensor wire.
1. Remove the front bottom hood and the lter screen.
2. Clean the lter screen with water.
3. Blow off the dust on the condenser with compressed air.
4. After the lter screen is dried, put it back to its original position and install
the hood.
Notes: The conguration of different product models is different, which is
subject to the physical object.
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Inner wall defrosting
Frosting may cause a gap between the ULT freezer and the door sealing
strip, resulting in poor refrigeration. The inner door shall be defrosted with an
ice shovel attached to the ULT freezer. The following steps are natural de-
frosting.
1. Shut down the auxiliary cooling device if any.
2. Remove items from the ULT freezer and transfer them to an envi-
ronment suitable for storage.
3. Turn off the power switch
4. Open the outer and inner doors to allow the ULT freezer to open
naturally for a period of time for defrosting.
5. Dry the accumulated water at the bottom of the ULT freezer with a
piece of dry cloth.
6. After cleaning the ULT freezer and inner door, restart the ULT freez-
er.
7. Put the items back into the fully cooled ULT freezer.
8. If there is an auxiliary cooling device, restart the device.
CAUTION Do not use knife, screwdriver or any other tool with a sharp
edge to defrost.
Equipment shutdown
Shutdown: If the ULT freezer is not used in an unsupervised area
for a long period, ensure that children do not have access to the
ULT freezer and that doors cannot be closed completely.
Scrapping: The scrapping disposal of the ULT freezer shall be carried out by
corresponding professionals. In order to prevent something like
suffocation, the ULT freezer doors must be removed.
Optional Accessories
Temperature recorder
Please refer to the Temperature Recorder Instructions provided by the tem-
perature recorder for use.
CAUTION Please install the temperature recorder by professional
technicians or after-sales personnel.
WARNING
Please cut off the power supply before installing the tem-
occur.
Freezer racks and cryo boxes
When the ULT freezer stores small specifcations of materials, freezer racks
and cryo boxes can make more effcient use of space. The height of the racks
may need to be properly adjusted.
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Troubleshooting and Repairs
Any product may suffer a failure. Please observe the equipment operation
during use. For any anomaly, please troubleshoot it by referring to the follow-
ing table. If the problem persists, please contact our service center. We will
serve you wholeheartedly to avoid losses.
Faults Troubleshooting
ULT freezer
does not work
Is the power circuit breaker normal?
Is the power voltage too low?
Is the power switch off?
Is the fuse blown?
Poor cooling
Is the ambient temperature too high?
Is the inner door closed tightly? Is the outer door closed
tightly?
(The frost between the ULT freezer and the door sealing
strip may damage the door sealing performance)
Is the air inlet dirty and blocked?
Is the temperature set correctly?
Is the ULT freezer away from direct sunlight?
Is the ULT freezer close to the heat source?
Are the rubber hole cover and insulation material of the test
through hole properly placed?
Is a large amount of high temperature articles placed in the
ULT freezer for a short time?
Loud noise Are other items contacted to the ULT freezer housing?
Is the base of the ULT freezer leveled?
Note: If the fault cannot be eliminated after the above items are
checked, or the fault is different from the above list, please contact the
after-sales personnel.
Model VS-86L458 VS-86L568 VS-86L718 VS-86L838
Matched freezer racks size
(single) mm 140*549*293 140*685*293 140*685*293 140*685*293
Number of
racks/drawers/hanging baskets 3 3 3 3
Number of inner doors 4 4 4 4
Number of freezer racks placed
Number of cryo boxes
16
320 400 500 600
16 20 24
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