Smeg SMU678 User manual [GB]
SMU50 SMU678
USER AND MAINTENANCE MANUAL
Rev. 01
User and maintenance manual
2
Smeg S.p.A. – Instruments Division
Via Leonardo da Vinci, 4
42016 Guastalla (RE)
www.smeg-instruments.com
READ CAREFULLY
This manual constitutes an integral part of the refrigerating unit.
It must be kept intact and at hand for the entire life cycle of the machine. It is necessary to read
the following manual carefully prior to using the device. Failure to read or thoroughly comprehend
the instructions in this manual may cause the device to malfunction and present hazards to the
user.
Machine installation, maintenance, and repair operations must be performed
by authorized technical staff.
Repair operations performed by unauthorized staff, besides leading
invalidating the product warranty, can be source of danger for the user.
In case of replacement, an original spare part must be used.
If the device was not used in accordance to the instructions presented in this
manual, the product may no longer be covered by warranty and the safety of
this device could be compromised.
The producer declines all liability for any use that differs from what indicated
in the present manual.
The refrigerating unit has not to be used in presence of explosive gases or
near sources with high electronic or magnetic fields.
The content of this manual is for information purposes only. The content and the equipment
described here may be subject to change without notification. The colours used in photographs of
the product (finishing panels), in diagrams and in screenshots are all purely guideline.
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SUMMARY
Products applicable to this manual .................................................................................................................. 4
Table of capacity and dimensions ................................................................................................................... 4
Table of technical specifications ...................................................................................................................... 5
Standard and optional fitting ............................................................................................................................ 5
1 STANDARDS AND GENERAL WARNINGS ......................................................................................... 6
1.1 Certification ........................................................................................................................................ 6
1.2 Initial recommendations ..................................................................................................................... 6
1.3 Precautions for use ............................................................................................................................ 9
1.4 Aim, content and intended user of this manual ............................................................................... 10
1.5 General safety regulations ............................................................................................................... 11
1.6 Customer responsibilities ................................................................................................................. 11
1.7 Customer service requests .............................................................................................................. 11
1.8 Ordering of spare parts .................................................................................................................... 11
1.9 Aim and intended use of device ...................................................................................................... 12
1.10 Unsuitable conditions for use........................................................................................................... 12
2 INSTALLATION ................................................................................................................................... 13
2.1 Transport and handling .................................................................................................................... 13
2.2 Positioning ....................................................................................................................................... 13
2.3 Wiring and electrical hook-up .......................................................................................................... 14
2.4 Set-up operations ............................................................................................................................ 14
2.5 Re-installation .................................................................................................................................. 14
2.6 Scrapping and disposal ................................................................................................................... 15
3 OPERATION ........................................................................................................................................ 16
3.1 Safety and accident prevention ....................................................................................................... 16
3.2 Safety dataplates and guards .......................................................................................................... 16
3.3 Operating limits ................................................................................................................................ 16
3.4 Environmental storage conditions ................................................................................................... 16
4 USER INSTRUCTIONS ....................................................................................................................... 17
4.1 Appliance start-up ............................................................................................................................ 21
4.2 Functions ......................................................................................................................................... 22
4.3 Control panel ................................................................................................................................... 23
4.4 Alarm codes ..................................................................................................................................... 34
4.5 Troubleshooting ............................................................................................................................... 35
5 ROUTINE MAINTENANCE ................................................................................................................. 37
5.1 Cleaning of the refrigerator .............................................................................................................. 37
5.2 Cleaning of the interior and exterior ................................................................................................ 37
5.3 Cleaning of the condenser ............................................................................................................... 38
5.4 Precautions for prolonged disuse .................................................................................................... 39
6 SPECIAL MAINTENANCE AND REPAIRS ......................................................................................... 39
6.1 Backup battery replacement ............................................................................................................ 39
7 ELECTRICAL DIAGRAM ..................................................................................................................... 41
8 AFTER-SALES SERVICE ................................................................................................................... 43
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Products applicable to this manual
The present manual is exclusively valid and applicable to the following SMEG product series.
Laboratory ultralow temperature freezers SMU series
Adjustable temperature control range: highest T = -40°C, lowest T = -86°C
Models:
SMU50
SMU678
All relevant data referring to SMEG products can be found on the data label visible on the rear part of the
cabinet. Here is an example of the label:
Table of capacity and dimensions
Internal
dimensions
External dimension and
unit net weigth
Dimensions of
packaging and shipping
weight
MODEL
Volume (L)
LxDxH (mm)
LxDxH (mm)
Kg
LxDxH (mm)
Kg
Laboratory ultralow temperature freezers – SMU series
SMU50
50
430 x 305 x 425
650 x 606 x 1080
74
788x720x1283
101
SMU678
678
750 x 696 x 1286
1090x1025x1965
330
1203x1155x2171
382
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Table of technical specifications
MODEL
Volume (L)
Voltage (V) / Frequency (Hz)
Rated Power
Absorption (W)
Gas
Q.ty (Kg)
Laboratory ultralow temperature freezers – SMU series
SMU50
50
230 / 50
720 (input 970)
R601+R600a+
R290+R170+
R1150+R50
0,28
SMU678
678
230 / 50
1729 (input 2525)
0,45
Standard and optional fitting
MODEL
Compartments
Standard fitting
Laboratory ultralow temperature freezers – SMU series
SMU50
1
• 4 Shelves (3 removable/adjustable + chamber bottom) (SMU678)
• 1 external door insulated + 1 insulating removable panel (SMU50)
• 1 external door insulated + 4 internal compartment doors insulated to
separately open the compartments (SMU678)
• Wheels (+ leveler feet SMU678)
• Schuko type plug
• Control panel with alarm system
• Remote alarm free contact
• USB port
• Datalogger
• Back-up battery
• 1 Passthrough port hole (SMU50)
• 3 Passthrough port holes (SMU678)
SMU678
4
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1 STANDARDS AND GENERAL WARNINGS
1.1 Certification
All appliances are produced in accordance with European Community Regulations applicable at the
time of its appearance on the market. All appliances are manufactured in accordance with European
Directive 2014/35/UE, 2014/30/UE and following integrations and according to safety requirements
for electrical equipment for laboratory use (IEC 61010-1).
1.2 Initial recommendations
READ THE PRESENT INSTRUCTION MANUAL CAREFULLY
This manual constitutes an integral part of the machine.
It must be kept intact and at hand for the entire life cycle of the machine.
It is necessary to read the following manual carefully prior to using the device.
Failure to read or thoroughly comprehend the instructions in this manual may cause the device to
malfunction and present hazards to the user.
Machine installation, maintenance, and repair operations must be performed by
authorized technical staff.
Repair operations performed by unauthorized staff, besides leading invalidating the
product warranty, can be source of danger for the user.
In case of replacement, an original spare part must be used.
If the device was not used in accordance to the instructions presented in this manual,
the product may no longer be covered by warranty and the safety of this device could
be compromised.
The producer declines all liability for any use that differs from what indicated in the
present manual.
The product warranty does not cover faulty parts due to negligence, inappropriate
use, or failure to comply with the instructions of the device operations; incorrect
installation or maintenance; repair and maintenance operations performed by
unauthorized staff or with non-original spare parts; transportation damages; and any
circumstance that cannot be ascribed to the device manufacturing defects.
Moreover, the warranty does not cover operations related to installation and
connection of alimentation and drain systems as well as maintenance operations
provided in the instruction booklet.
The installation of any accessory on the machine must be performed by authorized
technical staff.
To request further information about accessories: contact your trusted seller and/or
the authorized technical assistance, using the contact details provided in this manual.
The content of this manual is for information purposes only. The content and the equipment described
here may be subject to change without notification.
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WEAR PROTECTIVE THERMAL GLOVES!
Contents of the device or the inside walls of the freezer themselves may cause frostbit in case of
handling with naked hands
WARNING
Failure to observe WARNING signs could result in
a hazard to personnel possibly resulting in serious
injury or death.
CAUTION
Failure to observe WARNING signs could
result in injury to personnel and damage to
the unit and associated property.
CAUTION HOT
The sign inform the users about the danger of
burns for high temperature.
DANGER OF EXPLOSION
The sign inform the danger of the application of
volatile, explosive chemical substances.
NO TILTING
STAY OUT OF SUN
BEWARE OF ELECTRIC SHOCK!
Dangerous voltage may cause personal injury!
Please disconnect the power supply before repair.
GROUNDING MARK
NO TRAMPLING EQUIPMENT
NO TUMBLING TRANSPORT
PACKAGES
PRECISION INSTRUMENTS
HANDLE WITH CARE
THE CONTENTS MUST BE
PLACED AT THE ARROW
FEAR OF THE RAIN
NO STACKING
NO CLAMPING
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WARNING
Failure to observe WARNING signs could result in a hazard to personnel possibly
resulting in serious injury or death.
As with any equipment that uses CO2 gas, there is a likelihood of oxygen depletion in
the vicinity of the equipment.
It is important that you assess the work site to ensure there is suitable and sufficient
ventilation.
If restricted ventilation is suspected, then other methods of ensuring a safe
environment must be considered. These may include atmosphere monitoring and
warning devices.
Do not touch any electrical parts such as the power supply plug or any switches with
a wet hand. This may cause electric shock.
Only qualified and authorised engineers shall install the unit.
Be sure to install the unit on a sturdy floor. If the floor is not strong enough or the
installation site is not adequate, this may result in injury from the unit falling or tipping
over.
Carefully with the power cord to avoid short circuit or open circuit. When removing the
plug from the power supply outlet, grip the power supply plug, not the cord. Pulling the
cord may result in electric shock or fire by short circuit. Don't make the power line pack
and pressed by furnish or heavy goods. Also please don't close to the compressor and
heat source.
Please insert the power plug firmly to avoid leakage.
Use a power supply outlet with ground (earth) to prevent electric shock. If the power
supply outlet is not grounded, it will be necessary to install a ground by qualified
engineers.
Make sure a dedicated power source is used as indicated on the rating label attached to
the unit. Out of the rate, should install a property transformer and a proper voltage
stabilizer for safe operation.
Be sure to install the unit on a sturdy floor, no shaking and tilting.
Never install the unit in a flammable or volatile location. This may cause explosion or fire.
Never install the unit in a humid place or outdoor or a place where it is likely to be basked
straightly. Deterioration of the insulation may result which could cause current leakage
or electric shock.
Do not place the device lateral tilt, do not impact the device; the device is equipped with
refrigeration systems, roll or shock will easily damage the freezer.
Be sure to install the device in a dry dust-free environment to avoid overheating, short
circuit and other dangers.
If there is an unexpected sound, smell, smoke when the power is turned on, unplug the
power and contact the manufacturer or supplier. Continued abnormal operation may
cause electric shock or fire.
Make sure to put the freezer in a dry and ventilated location, to ensure that equipment
vents and wall surface of the instrument or other items have not been blocked; Do not
use the device in a poorly ventilated environment, or the equipment may be damaged by
the release of heat.
Never disassemble, repair, or modify the unit by yourself.
Any such work carried out by an unauthorized person may result in fire or injury due to a
malfunction. Smeg will be no responsible for such work.
Use this unit in safe area when treating the poison, harmful or radiate articles. Improper
use may cause bad effect on your health or environment.
Never place the unit through on a gas pipe, water main, telephone line or lightning rod.
Such grounding may cause electric shock in the case of an incomplete circuit.
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Use a power supply outlet with ground (earth) to prevent electric shock. If the power
supply outlet is not grounded, it will be necessary to install a ground by qualified
engineers.
CAUTION
Failure to observe WARNING signs could result in injury to personnel and damage
to the unit and associated property.
Ultra-low temperature freezer is not available to store living things or other critical
articles which is not suitable for low temperature storage.
The temperature inside the freezer is very low during the normal working. Do not
touch the interior surface of the chamber or the object inside without wearing
protective gear.
Always disconnect the power plug when the unit is not used for long periods.
Make sure to prepare a safety check sheet when you request any repair or
maintenance for the safety of service personnel. Be sure to check set point of the
controller before restarting the freezer.
Always hold the handle when closing the door. This will reduce the likelihood of a
trapped finger.
Keep the key properly avoiding the children take it to open the door which may
result in unexpected injury.
Select a level and sturdy floor for installation. This precaution will prevent the unit
from tipping. Improper installation may result in water spillage or injury from the
unit tipping over.
Check the filter mentioned in this manual and clean it properly and periodically.
A dusty filter may cause temperature rise or failure.
Do not tilt the unit more than 45 degrees when moving the unit.
All transportation shall be done carefully.
1.3 Precautions for use
• When the freezer is running, the front part of the freezer may get hot. This is not a
malfunction: In order to prevent dew condensation around the case body, a heated anticondensation tube is installed in the cryogenic storage case.
• Before putting the items in the freezer, please make sure the temperature inside the
chamber has reached the set temperature, and then put the items in batches. Add no more
than 1/3 of the container volume each time, in case the temperature rises too much.
• The temperature display value shows the temperature of temperature sensors inside the
freezer. Although the displayed temperature may sometimes differ from the actual
temperature in the center of the freezer, it will get close to the real temperature gradually.
• A through-hole is installed on the side or back of the freezer to allow test lines to exit the
test box. After drawing out the test lines, be sure to re-plug the test hole with insulating
material, otherwise the temperature inside the box will not be completely lowered, resulting
in condensation around the outside of the hole.
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• Clean the freezer with diluted neutral detergent. Do not use brushes, acid, gasoline, soap,
polish or hot water to clean the frozen storage container, as these materials may damage
the surfaces and plastic and rubber components.
• After a period of operation, mostly if the frequency of door openings is high, a layer of frost
may form on the inner wall and the inner door. If the frost layer is too thick, it will affect the
insulation effect of the freezer and increase the power consumption. Therefore, after a
period of time, when the frost layer reaches about 5mm, it should be defrosted with the
defrost shovel included.
• Please remove the frozen items in the freezer and put them in a suitable storage place
before defrost, so as to avoid the damage of goods for temperature rise.
• There are many cooling coils on the back and side of the inner wall. Don't use sharp objects
such as knives, ice chisel, or screwdrivers to remove the frost on the inner wall. Be careful
not to scratch the inner wall when defrosting, otherwise it will cause a failure of the freezer.
• Cut off the power when the refrigerated storage box will not be used for a long time.
1.4 Aim, content and intended user of this manual
This manual has been prepared with the objective to supply all instructions required for the correct
use of the appliance and to keep it in optimal condition. It also contains important user safety
information.
The following professional roles are explained in order to define the responsibilities of each
involved parties.
Installer: a qualified technician, authorised by the manufacturer, who installs the appliance in
accordance with the instructions herein contained.
User: the person who, after having read this manual carefully, uses the appliance in accordance
with the intended specification of use described in this manual.
User’s responsibilities:
▪ ensure that the product is kept at suitable temperatures without exceeding +38° of ambient
temperature;
▪ be aware of the regulations governing the conservation of products to refrigerate and to
observe any whatsoever hygiene indications that may be applicable.
The user is obliged to read carefully the manual and refer to its information at all times. Particular
attention must be paid to the contents of heading 1.4 General safety warnings.
Routine maintenance technician: qualified operator able to perform routine maintenance of the
appliance by following the instructions in this manual (can be the customer too e).
Service engineer: qualified technician, authorised by the manufacturer to perform extraordinary
maintenance of the appliance.
Installer and service engineer must always be authorized by the manufacturer.
The manufacturer declines any whatsoever responsibility in case of improper use of the appliance
deviating from the reasonably construed intended use, and for all operations carried out that are
not in compliance with the instructions reported in the manual.
This manual must be stored in an accessible and known place for all operators (installer, user,
routine maintenance technician, service engineer).
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1.5 General safety regulations
Read this manual carefully and follow the prescriptions contained herein.
The user assumes full responsibility in case of operations carried out without observing the
instructions in the manual. None of SMEG products are designed to work in presence of flammable
gases or solvent that may easily burn, hence keep off the unit of any of these situations.
Primary general safety regulations:
▪ do not touch the unit with wet hands and/or feet
▪ do not use the appliance with bare feet
▪ do not insert screwdrivers or other pointed objects between guards or moving parts of the
appliance
▪ do not pull the power cord to disconnect the appliance from the electrical mains
▪ make sure that the appliance is not used by unsuitably qualified persons
▪ before performing any cleaning or maintenance on the appliance disconnect it from the
electrical mains by switching off the main switch and extracting the plug
▪ in case of faults or malfunctions, switch off the appliance and do not attempt to repair it by
yourself. All service and repair operations must be performed exclusively by a suitable
authorized engineer.
This symbol on the equipment indicates a situation of danger. Pay attention
and read carefully what it refers to.
1.6 Customer responsibilities
The customer is required to:
▪ execute the electrical connection of the appliance
▪ prepare the place of installation
▪ provide consumable materials for cleaning
▪ perform routine maintenance
In the case of power failures or malfunctions do not open the doors in order to maintain as much
as possible the internal temperature. If the problem persists for more than few hours, move the
contents to a more suitable place.
1.7 Customer service requests
For all technical problems and any requests for technical service, refer exclusively to your local
dealer, pointing out model and serial number.
1.8 Ordering of spare parts
Orders of spare parts should be made by consulting the part reference code and the serial number
of your appliance. Consult your dealer.
The user must consult the dealer or the manufacturer, as the case of SMEG
appliances require original spare parts, failing of which product certification
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decades.
1.9 Aim and intended use of device
The appliance is conceived for the use in hospitals, laboratories, pharmacies and industries and it
is intended solely for the preservation of laboratories and medical products, which request various
controls and warning in case of sudden alteration of temperature.
In particular: medicinal products; laboratory samples; thermo-sensitive chemical reactants
It is absolutely not intended for storage of flammable materials, gas or explosive materials
Products must be stored in order to ensure efficient air circulation inside the
appliance and shall not come out of the shelf perimeter.
All uses except authorized used of the appliance shall be construed as “improper
use” for which the manufacturer declines all responsibility.
1.10 Unsuitable conditions for use
The appliance must not be used exposed to bad weather, with adapters, multiple sockets or
extension leads, in an explosive atmosphere or in an atmosphere with a fire risk or closed to
heating sources.
In case of built-in refrigerator a proper ventilation of compressor must be provided.
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2 INSTALLATION
2.1 Transport and handling
The appliance must be transported and handled exclusively in upright position, in
observance of the instructions printed on the packing.
This precaution is necessary to avoid contamination of the refrigerant circuit with compressor lube
oil with resulting valve and heat exchanger coil failure and problems starting the electric motor.
The manufacturer cannot be considered responsible for any problems due to transport executed in
conditions other than those specified herewith.
The appliance is secured to a wooden base by means of a screw and wrapped in a cartoon box.
The appliance must be handled using a folk lift truck or a pallet truck with suitable forks (fork length
at least equal to 2/3 length of unit). The dimensions and weight of the packed appliance are shown
in technical tables (see tables at the beginning of manual).
2.2 Positioning
Incorrect positioning can cause damage to the appliance and generate hazardous conditions for
personnel. The installer must therefore observe the following general regulations:
▪ make sure you maintain a minimum of 30 cm from the walls and the ceiling
▪ the room must be well ventilated
▪ Ambient temperature: between +10°C and +32°C, optimal ambient temperature +18°C and
+25°C, air conditioning system is required if necessary
▪ Relative humidity: ≤80% RH
▪ Altitude where the freezer is located below 2000 m on sea level
▪ keep well away from sources of heat
▪ avoid direct sunlight
▪ remove packing material
▪ remove accessories from inside the unit
▪ wood basement removal: by means of a hammer until the feet-block hinder ledge, tilt the
cabinet to one side and loosen the two thread-forming screws, drag the cabinet from the
back side holding the basement still until the four feet have gone out from the containing
holes, slightly tilt the cabinet backward and take the basement away pulling it from the front
side
Use gloves when handling wooden packing materials and the wooden base to
protect the hands from splinters.
▪ position the appliance with the help of a spirit level. Adjust the levelling feed on the metal
base of the unit if necessary.
▪ remove the protective PVC film from the external surfaces of the unit
▪ position the shelf runners in the holes in the uprights
▪ insert the shelves in the runners
▪ insert the condensate collection tray, if needed, in the relevant runners located beneath the
unit
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2.3 Wiring and electrical hook-up
The electrical plant and electrical hook-up operations must be performed by a qualified electrician.
For safety reasons adhere to the following indications:
▪ check that the electrical plant is suitably sized for the absorbed power of the unit
▪ if the electrical socket and the plug on the appliance power cord are incompatible, charge the
plug with a suitable component, ensuring the replacement part is of the approved type
▪ insert the cable into the jack
▪ do not use reductions or multi-way adapters
It is important to connect the appliance correctly to an efficient earth system
executed in compliance with the relevant legislation.
▪ the appliance must be positioned so that plug can be easily reached
▪ socket inputs shall be connected to circuit protection facilities, such as: an air switch which
the rated current is bigger than the required for the freezer.
▪ check the working voltage of the place before starting the freezer. A voltage stabilizer is
suggested to be used at the place where the voltage is not stable. Power of voltage stabilizer
shall be more than the required for the freezer.
2.4 Set-up operations
To avoid errors and accidents, perform a series of checks for possible damage sustained during
transport, installation and hook-up operations before starting up the unit.
PRELIMINARY CHECKS
▪ check the condition of the power cord (no cut or chaffing)
▪ check that the feed, door hinges and shelf support are stable
▪ check the door seals and drawers are not damaged (broken or scratched) and that the door
closes and is sealed properly
▪ make sure pipelines, unions are in perfect condition
INDICATIONS FOR OPTIMAL DUTY
▪ do not block the motor compartment air vents
▪ do not lay objects on the top of the appliance
▪ before storing products wait until they are cold
▪ arrange the products on suitable shelves or in containers. Do not place products directly on the
base or against the walls, doors or fixed guards of the unit
▪ make sure doors are kept closed
▪ keep the defrost water drain outlet clear
▪ limit the frequency and duration of opening; each time the door is opened the internal
temperature will alter
▪ load products at ambient temperature gradually to allow correct refrigeration
▪ perform routine maintenance regularly (see Chapter 5)
2.5 Re-installation
Observe the following procedure:
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