B medical systems MRB 3000 SDD User manual

820 9506 46- ed0821
MRB 3000 SDD
SOLAR DIRECT DRIVE
ICE-LINED BLOOD STORAGE REFRIGERATOR
Instructions for Use

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Ice-lined blood storage refrigerators in 220-240V 50/60Hz
are Class IIa medical devices according to the European
Medical Device Regulation (EU) 2017/745 and bear a
CE0123 marking.
This equipment is certified according to the safety standard IEC 60335-1.
This equipment is designed to be safe at least under the following
conditions (based on the IEC 60335-1):
Indoor use;•
Altitude up to 2000 m;•
Temperatures 10°C to 43°C;•
Maximum relative humidity 95%.•
Mains supply voltage fluctuations up to ±6% of the nominal voltage;•
Transient overvoltages up to the levels of overvoltage category II;•
Pollution degree 2.•

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TABLE OF CONTENTS
page
1 Model Overview ___________________________________________5
2 Important Information ______________________________________6
2.1 Warnings and Cautions ________________________________6
2.1.1 Warnings______________________________________7
2.1.2 Cautions ______________________________________8
2.2 Labels and Symbols on the Packaging ____________________9
2.3 Unpacking and Inspection ______________________________9
2.4 Intended Use ________________________________________10
2.4.1. Intended purpose ______________________________10
2.4.2. Intended target population _______________________10
2.4.3. Intended use environment _______________________10
2.4.4. Indications ____________________________________10
2.4.5. Contraindications _______________________________11
3 Installation Procedure_______________________________________12
3.1 Location ____________________________________________12
3.2 Final position ________________________________________13
3.3 Initial cleaning and disinfection __________________________13
3.4 Electrical Connection __________________________________14
3.4.1 Connecting to the “B Medical Systems” Solar Generator _14
4 Use and Operation _________________________________________15
4.1 Switching on_________________________________________15
4.2 Opening and closing___________________________________15
4.3 Important Advice for Storage ___________________________16
4.4 Operating controls _____________________________________17
4.4.1 Main switch____________________________________17
4.4.2 Control panel __________________________________17
4.4.3 Display _______________________________________17
4.4.4 Temperature setpoint and alarm values _____________17
5 Alarms ___________________________________________________18
5.1 Messages overview____________________________________18
5.2 Alarm messages ______________________________________19
5.3 Warning messages ____________________________________19
6 Additional equipment _______________________________________21
6.1 Rechargeable battery __________________________________21
7 Maintenance and repair _____________________________________22
7.1 Cleaning ____________________________________________22
7.2 Condensation water ___________________________________22
7.3 Ventilation ___________________________________________23
7.4 Periodic Maintenance __________________________________23
7.4.1 Daily __________________________________________23
7.4.2 Weekly ________________________________________23
7.4.3 Monthly________________________________________23
8 Disposal__________________________________________________23
9 Troubleshooting ____________________________________________24
10 Technical data ____________________________________________25

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1 Model Overview
Group Model name
Ice-lined Blood Storage Refrigerators MRB3000SDD

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2 Important Information
• Before using the MRB3000SDD, read these operating instructions carefully, including all the information
on operating safety, use and maintenance.
• B Medical Systems does not guarantee the safety of the stored products, if the appliance is used for any
purposes other than its intended use or if any procedures other than those mentioned in this operating
manual are used.
• Keep these operating instructions ready at hand and leave them with the unit, so that all users have
access to information on the functions and safety regulations.
• Contact our sales representative or agent for any problems related to these operating instructions.
• Any serious incident that has occurred in relation to the device should be reported to the manufacturer
and the competent authority of the Member State in which the user is established.
• These operating instructions may not be reproduced in any form without the written permission of our
company.
• Our company guarantees the product under certain warranty conditions. We shall in no way be
responsible for any loss or damage of content.
• The sound intensity level produced by the appliance is lower than 70 dBA (measured at a distance of 1
meter).
• The MRB3000SDD is an ice-lined blood storage refrigerator for Solar Direct Drive without battery storage.
t has a bank of icelining elements installed inside the cabinet. During operation these elements freeze
and act as cold storage for protecting the stored blood bags during periods without energy supply (night
time).
2.1 Warnings and Cautions
• It is of utmost importance that any user complies with these operating instructions as they contain
important safety advice.
• Items and procedures are described so that this unit can be used correctly and safely. Following the
advised precautions will prevent possible injury to the user and third parties.
• Precautions are illustrated in the following way:
WARNING
CAUTION
A WARNING is a statement that alerts to the possibility of injury, death
or other serious adverse reactions associated with the use or misuse
of the device.
A CAUTION is a statement that alerts to the possibility of a problem
with the device associated with its use or misuse. Such problems
include device malfunction, device failure, damage to the device or
damage to other property.
This mark is placed where electrical components are enclosed to prevent electric shock.
The cover should only be removed by a qualified engineer or a service personnel only.
This mark is placed where flammable components (refrigerants) are enclosed. Special
care has to be taken when working on these components.
This mark warns about low temperatures and freezing conditions inside the appliance.

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2.1.1 Warnings
• Do not use the device outdoors. Current leakage or electric shock may result if the unit is exposed to
rain water.
• Before cleaning or carrying out maintenance work, always switch the device off and disconnect the mains
plug. Working on the connected appliance may cause electric shock or fire.
• During defrosting, water will leak from the unit. Collect this water so that it does not lead to a risk of
slipping for passing persons.
• Make sure that no water penetrates the ventilation slots of the unit.
• Before cleaning or carrying out maintenance work, the contents preserved in it will have to be removed
and temporarily stored in another working refrigerator.
• Make sure the condensation water is removed on a weekly basis. Increased condensation water inside
the device may lead to malfunctioning of the device.
• Inspect the unit on a regular basis for damaged parts. Only genuine spare parts may be used. Use of
any other parts may affect the performance or cause physical injury or damage to the equipment.
• The wall socket must be easily accessible.
• When disconnecting, always pull the plug and never the cable. Pulling the cord may result in electric
shock or fire by short circuit.
• These devices must only be used by adults. Do not allow children to play with the device or touch the
controls.
• Ensure that the unit is steady and perfectly straight and does not knock against anything next to it. 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.
• When transporting or moving the device, be aware of its weight. Do not try to move a fully loaded device.
• Ensure that the connecting cable is not squeezed or bent when the unit is being installed or moved.
Deterioration of the insulation may cause current leakage or electric shock.
• Never install the device where acid or corrosive gases are present as current leakage or electric shock
may result due to corrosion.
• Before connecting, check whether the details on the nameplate correspond to local values. Use of a
voltage or frequency other than that on the nameplate may cause fire or electric shock.
• Do not store flammable or explosive substances inside these appliances (e.g. aerosols with
flammable propellant). These may cause explosion or fire.
• Make sure that no sharp or pointed objects come into contact with the cooling system. The
cooling system contains flammable refrigerant. Both the appliance and the products stored
inside can be severely damaged if this system starts to leak.
• Do not insert metal objects such as a pin or a wire into any vent, gap or any outlet. This may cause
electric shock or injury by accidental contact with moving parts.
• Disconnect the power supply prior to any repair or maintenance in order to prevent electric shock or
injury.
• Do not touch any electrical parts (such as power supply plug) or operate switches with a wet hand. This
may cause electric shock.
• All installation work and adjustments to the refrigerator must be carried out by qualified personnel. Work
performed by persons with insufficient technical knowledge may adversely affect the performance or
cause physical injury or damage to the equipment.
• When the unit is in its final position it is important to immobilise the unit using the feet.
• It is of utmost importance that the icelining elements are in place. Make sure that all these elements are
in place before starting the unit. Never remove the icelining elements from the unit.
• Make sure that the lid is securely closed by closing the latches.
• Note that the unit may be locked using a key. Always ensure that the key is available to the user.
• Before scrapping an old unit, remove the door so that children cannot lock themselves inside while
playing.
• Before scrapping the unit, remove the lead accumulator and dispose of it separately.
• When disposing of the unit, make sure that it does not get too hot, as combustible gas would cause the
insulating foam to froth up.
• The appliances contain environmentally friendly refrigerant. Before disposing of the appliance, the
refrigeration circuit should be opened outside so that the refrigerant can escape.
Attention: The refrigerant is flammable!
• Make your contribution to saving the environment. Bear in mind that orderly and proper disposal is
required. Packaging materials and devices are always recyclable and should be taken for recycling.

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2.1.2 Cautions
• Ensure that there is sufficient room around the unit for air circulation. A good air circulation especially
around the compressor is essential for trouble-free operation. Keep the ventilation openings of the
compressor cover always free from any obstruction. Make sure that a minimum distance is provided
between the unit and any wall or other device located next to it.
• Do not locate the unit below a ceiling fan or right next to air-conditioning equipment.
• The sound intensity level produced by the appliance is lower than 70 dBA (measured at a distance of
1 meter).
• Check whether the appliance has been delivered undamaged. If you find that damage has occurred in
transit, immediately contact the delivery service or relevant sales outlet, submitting the delivery note or
proof of purchase.
• Do not operate a unit that has been damaged in transit! If you are unsure, contact your sales outlet and
ask them.
• The device must be transported in an upright position only (maximum inclination 45°).
• All connected devices/signalling equipment must provide reinforced or double insulation for protection
against electric shock.
• Upon the occurrence of an alarm situation, attempts must be made to discover the reason for the alarm
and resolve it as quickly as possible. If that is not successful the necessary measures must immediately
be taken so that the stored goods are not damaged.
• Optimal function of the appliance is given at an ambient temperature indicated in the technical data (see
chapter 10) with a maximum relative humidity of 95%.
• The device must be set up in a dry well-ventilated place. Avoid direct sunlight or locating it close to a
heat source. The location must be protected against rain and dust.
• This device cannot be used/is not for use in facilities at altitudes of 2000m or higher.
• The use of hydrogen peroxide H2O2 (VHP) for the disinfection (sterilization) of the appliances is not
suitable. This procedure may be applied exclusively with dedicated appliances.
• Other than the cleaing procedure described in this manual, follow the internal policy and procedures.
• Before using the refrigerator it should be cleaned inside and outside.
• For cleaning, use only gentle cleaning agents. Never use aggressive or caustic cleaning agents, scouring
powder, steel wool, abrasive sponges or chemical solvents. When cleaning, make sure that no fluids of
any kind run into the ventilation housing.
• For disinfecting, we recommend all the surface disinfecting agents commonly used by the customer,
provided they are recommended by the national organizations. For disinfecting small areas, we
recommend using a concentrated alcoholic agent.
• Before being loaded, the unit must have reached the set point temperature.
• The load should only be stored in the provided baskets and should not exceed the storage areas. The
total amount of stored blood bags should be evenly distributed on the 5 baskets (max. 18 blood bags
per basket) (image 6). Do not overload the device.
• Different blood or plasma types should be sorted and stored in a manner for the User to identify these
with easy.
• The loading must never obstruct the air-inlet-openings.
• Do not store warm items in the devices. They are not designed for fast cooling of warm items.
• Avoid long and / or frequent lid openings to prevent that the inner temperature rises to high.
• Make sure that the lid is correctly closed by using the supplied latches and that the lid gasket seals
correctly against the cabinet.
• Do not bring more than 18 new blood bags per day into the MRB3000SDD.

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2.2 Labels and Symbols on the Packaging
• Follow the instructions for transport and storage of the product marked on the packaging:
2.3 Unpacking and Inspection
CAUTION
• Check whether the unit has been delivered undamaged. If you find that damage has occurred in transit,
immediately contact the delivery service or relevant sales outlet, submitting the delivery note or proof of
purchase.
• Do not operate a unit that has been damaged in transit! If you are unsure, contact your sales outlet and
ask them.
• The unit must be transported in an upright position only (maximum allowable inclination 45°).
• Make your contribution to saving the environment. Bear in mind that orderly and proper disposal of
packing materials is required. Packaging materials and devices are always recyclable and should be taken
for recycling.
Handle with care Store in a dry place
This side up Stacking limitation

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2.4 Intended Use
2.4.1. Intended purpose
Ice-lined blood storage refrigerators are devices intended to be used in the blood transfusion medicine
for the support on the diagnosis, prevention and treatment of diseases or injuries by keeping whole blood
or blood components at a protective and stable temperature between 2°C to 6°C until they are ready for
use. The devices comprise an icelined compression cooling system and an integrated alarm system that
warns against unexpected temperature excursions and power failures.
2.4.2. Intended target population
Pharmacists, doctors, laboratory staff or other staff that are trained and/or experienced in dealing with
whole blood and blood components.
The Ice-lined blood storage refrigerators must be operated by individuals in organizations that have the
knowledge of the relevant FDA, AABB, EU or any other applicable regulations on storage and distribution
of blood and blood components. The organization must implement and validate procedures for the
storage and distribution of blood and blood components according to these regulations, including the
necessary storage temperature and the suitable storage period.
Service technicians with a recognized license or certificate as required by local authorities for installation,
servicing and repair of refrigeration systems and equipment, and properly trained on the ice-lined blood
storage refrigerators.
Patients do not come into direct contact with the refrigerators.
2.4.3. Intended use environment
The Ice-lined blood storage refrigerators are stationary type devices and are intended to operate indoors
in hospitals, blood donation services, blood transfusion centers and clinical laboratories.
The devices are designed for an ambient temperature range from +10°C to +43°C under operation, and
from -30°C to +55°C during transport and storage. The ambient humidity range during transport,
storage and operation lies between 5% and 95%.
The devices must not be used outdoors.
2.4.4. Indications
The Ice-lined blood storage refrigerators are intended for the safe storage of whole blood and blood
components used in the clinical medicine for diagnosis, prevention and treatment of diseases or injuries.
Whole blood, red cells, and other blood components intended to be used for transfusion, like leucocyte-
depleted whole blood and red cells, must be kept at a controlled temperature between 2°C and 6°C
during storage and can be stored for a period of time of up to 35 days, depending on the
anticoagulant/preservative solution used.
Long storage of whole blood and blood components above 6°C increases the risk of bacterial
contamination (septicemia), which may progress to septic shock. Septic shock has a death rate as high
as 50%, depending on the type of organism involved, and therefore requires urgent medical
intervention.
The storage of blood and blood components below 2°C increases the risk of rupture of the red cells
(haemolysis).

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During a maximum transit time of 24 hours, the temperature of whole blood or other blood components
must at no time exceed +10°C. Temperature excursions above +10°C increases the risk of sepsis due
to bacterial contamination.
Blood components intended for intrauterine and exchanged transfusion (e.g. IUT, ET, PR/ET) must be
stored between 2°C and 6°C for no longer than five days prior to use. After concentration and irradiation,
the storage time must be no longer than 24 hours.
2.4.5. Contraindications
The devices are not intended to be used for quick cooling of blood or blood components.
The devices are not intended to be used for the cooling of foodstuffs or any other products not covered
in the intended purpose.
The devices are not intended to be operated outside the environmental and installation conditions
documented in the operating instructions.

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3 Installation Procedure
WARNING
• All installation work and adjustments to the refrigerator must be carried out by qualified personnel. Work
performed by persons with insufficient technical knowledge may adversely affect the performance or
cause physical injury or damage to the equipment.
• Ensure that the connecting cable is not squeezed or bent when the unit is being installed or moved.
Deterioration of the insulation may cause current leakage or electric shock.
• When transporting or moving the device, be aware of its weight. Do not try to move a fully loaded device.
3.1 Location
• The following section provides information on how to install and place the device in your location. Please
note that all indicated distances are minimum distances.
WARNING
• Do not use the device outdoors. Current leakage or electric shock may result if the unit is exposed to
rain water.
• Ensure that the unit is steady and perfectly straight and does not knock against anything next to it. 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.
• Never install the unit where acid or corrosive gases are present as current leakage or electric shock may
result due to corrosion.
• The wall socket must be easily accessible.
• When the unit is in its final position it is important to immobilise the unit using the feet.
CAUTION
• Optimal function of the appliance is given at an ambient temperature indicated in the technical data (see
chapter 10) with a maximum relative humidity of 95%.
• Ensure that there is sufficient room around the unit for air circulation. Refer to images 1 and 2 for
minimum distances to a wall or adjacent units. A good air circulation especially around the compressor
is essential for trouble-free operation. Keep the ventilation openings of the compressor cover always free
from any obstructions. Make sure that a minimum distance is provided between the unit and any wall or
other device located next to it.
• The device must be set up in a dry well-ventilated place. Avoid direct sunlight or locating it close to a
heat source. The area must be protected against rain and dust.
• Do not locate the unit below a ceiling fan or right next to air-conditioning equipment.
• This device cannot be used/is not for use in facilities at altitudes of 2000m or higher.
• Two spacers are included with the MRB3000SDD. These must be attached to the rear of the unit as shown
in the figure, before positioning the unit against the wall.
min.
10 cm
min.
3 cm
MB 3000 G
spacer
image 1: minimum distance to wall or other devices image 2: spacer installation

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3.2 Final position
• The MRB3000SDD is equipped with bearing rolls.
Once it is in its final position, the feet must be
screwed up to immobilise it and stop it rolling
away. Screw the feet with the provided key until
the rolls do not touch the floor anymore (image 3).
3.3 Initial cleaning and disinfection
CAUTION
• The use of hydrogen peroxide H2O2 (VHP) for the disinfection (sterilization) of the appliances is not
suitable. This procedure may be applied exclusively with dedicated appliances.
• Other than the cleaing procedure described in this manual, follow the internal policy and procedures.
• Before using the refrigerator it should be cleaned inside and outside.
• For cleaning, use only gentle cleaning agents. Never use aggressive or caustic cleaning agents, scouring
powder, steel wool, abrasive sponges or chemical solvents. When cleaning, make sure that no fluids of
any kind run into the ventilation housing.
• For disinfecting, we recommend all the surface disinfecting agents commonly used by the customer,
provided they are recommended by the national organizations. For disinfecting small areas, we
recommend using a concentrated alcoholic agent.
• Refer to section 7 for more information on cleaning.
foot bearing roll
image 3: handling of the feet

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3.4 Electrical Connection
WARNING
• Before connecting, check whether the details on the nameplate in the interior correspond to local values.
Use of any other voltage or frequency other than that on the nameplate may cause fire or electric shock.
• Disconnect the unit from power supply prior to any repair or maintenance in order to prevent electric
shock or injury.
• Do not touch any electrical parts (such as power supply plug) or operate switches with a wet hand. This
may cause electric shock.
• When disconnecting, always pull the plug and never the cable. Pulling the cord may result in electric
shock or fire by short circuit.
CAUTION
• Before connecting and switching the unit on for the first time, allow it to stand for 30 minutes.
• To prevent problems with other electrical equipment causing malfunction, the unit should be connected
to a separate circuit. Never connect it to a single socket with other electrical equipment by means of a
multi-socket.
• Make sure that the plug is easily accessible so that if needed it can be easily be disconnected without
having to move other equipment or furniture.
• All connected devices/signaling equipment must provide reinforced or double insulation for protection
against electric shock.
• The MRB3000SDD is intended to be connected to a “ B Medical Systems “ solar generator.
• It is designed to work with a minimum solar radiation reference period of 3.5 kWh/m2/day.
• The generator must provide a voltage of 25V DC with a minimum power of 400W at STC.
3.4.1 Connecting to the “B Medical Systems” Solar Generator
• For installation of the solar power generator refer to the Installation instructions.
• Connect the MRB3000SDD to the generator system with the
provided plug.

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4 Use and Operation
WARNING
• The devices must only be used by adults. Do not allow children to play with it or touch the controls.
• Do not store flammable or explosive substances inside these appliances (e.g. aerosols with flammable
propellant). These may cause explosion or fire.
• Make sure that no sharp or pointed objects come into contact with the cooling system. The cooling
system contains flammable refrigerant. Both the appliance and the products stored inside can be
severely damaged if the system starts to leak.
• Do not insert metal objects such as a pin or a wire into any vent, gap or any outlet. This may cause
electric shock or injury by accidental contact with moving parts.
• It is of utmost importance that the icelining elements are in place. Make sure that all these elements
are in place before starting the unit. Never remove the icelining elements from the unit.
• Make sure that the lid is securely closed by closing the latches (refer to 4.2).
• Note that the unit may be locked using a key. Always ensure that the key is available to the user.
CAUTION
• The sound intensity level of the unit is lower than 70dBA (measured at a distance of 1 meter)
4.1 Switching on
• Install the MRB3000SDD as detailed under “Installation procedure”.
• Shift the ON/OFF-switch to position “I” (see 4.3.2). The temperature display turns on. In case it does
not, the battery is discharged. Wait for solar power to be present in order to turn the display on. The
green LED lights up when there is a minimum of solar energy available.
• Supposed that there is enough solar energy available after switching on, the device starts working
after a delay of 5 minutes. This also applies, if the equipment is switched off and on again.
• Close the lid and allow the unit to run. The temperature inside the cabinet is indicated on the main
area of the display. Observe the temperature from time to time.
• Initially the temperature inside will be observed to be similar to or slightly below the ambient
temperature. It will decrease slowly and remain steady after several days.
• The warning message „E0.3“ will be displayed in the max area of the display until the temperature has
once reached the preset range of +2°C to +6°C. During this startup phase the temperature alarm
system is deactivated. The alarm system will be activated as soon as the message „E0.3“ disappears or
latest 72 hours after switching on.
• During the start phase, until the activation of the temperature alarm system, the temperatures
displayed in the different areas of the display are identical.
• In order to assure a complete freezing of the icelining, it is advisable to run the MRB3000SDD for at
least 7 days before loading.
4.2 Opening and closing
• The unit comes with two latches, one of which contains a key lock system.
• To open the unit, pull the clip up and remove the latch from the groove in the lid.
• To close the unit, pull the clip up, hook the latch in the groove of the lid and pull the clip down.
• Once the unit has been securely closed, the user may lock the unit using a common key lock system.
image 4: latch and lock mechanism
Open latch Closed latch and
key lock

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4.3 Important Advice for Storage
CAUTION
• Before being loaded, the unit must have reached the set point temperature.
• The load should only be stored in the provided baskets and should not exceed the storage areas. The
total amount of stored blood bags should be evenly distributed on the 5 baskets (max. 18 blood bags
per basket) (image 6). Do not overload the unit.
• Different blood or plasma types should be sorted and stored in a manner for the user to identify these
with ease.
• The loading must never obstruct the air-inlet-openings.
• Do not store warm items in the devices. They are not designed for fast cooling of warm items.
• Avoid long and / or frequent lid openings to prevent that the inner temperature rises to high.
• Make sure that the lid is correctly closed by using the supplied latches and that the lid gasket seals
correctly against the cabinet.
• Do not bring more than 18 new blood bags per day into the MRB3000SDD.
• The MRB3000SDD is designed as storage unit for blood bags. It is not designed for cool down. The bags
should therefore be precooled at less than +6°C before storing them in the MRB30000SDD.
• The maximum storage capacity of the MRB3000SDD is 40.5 L of blood (90 blood bags of 500ml filled
with 450ml each).
• Store the blood bags in upright position (image 5).
• The optimum storage place for newly inserted blood bags is in the upper right basket.
• To benefit from the maximum daily runtime of the compressor, new blood bags should be brought into
the MRB3000SDD in the early morning at sun rise.
image 5: upright position of blood bags image 6: max. storage capacity

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4.4 Operating controls
4.4.1 Main switch
• The main switch of the MRB3000SDD is
located behind the ventilation grid on the
back side of the unit.
4.4.2 Control panel
max
min
Alarm LED Power LED
Mute
button
Reset
button
Display
• The red Alarm LED lights up if an alarm situation occurs.
• The green power LED indicates that the cooling system is active.
• The Mute button is used to switch off the audible alarm for a predefined time of 30 minutes.
• Press the Reset button for 5 seconds to synchronize the actual inside temperature and the displayed
max and min values.
4.4.3 Display
• In normal use, the inside temperature of the appliance is displayed in the main area of the diplay
(°C with one decimal).
max
min
main area min area
max area
• The max and min areas are showing the highest respectively lowest temperature since the last Reset.
• If an alarm situation occurs, the corresponding alarm message is displayed in the main area.
• Warning messages are shown in the max area of the display.
4.4.4 Temperature setpoint and alarm values
• The temperature setpoint as well as the alarm values are preset at the factory and cannot be changed.
The alarm values defined by the blood directives are +2°C (low alarm) and +6°C (high alarm)
main switch
fuse
ventilation grid

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5 Alarms
CAUTION
• Upon the occurrence of an alarm situation, attempts must be made to discover the reason for the alarm
and resolve it as quickly as possible. If that is not successful the necessary measures must immediately
be taken so that the stored goods are not damaged.
• An error of the system or a component can lead to a system failure. Depending of the failure type the
error can generate an alarm or a warning
5.1 Messages overview
Code Type Description
E0.1 Alarm Low temperature alarm
E0.2 Alarm High temperature alarm
E0.3 Warning Temperature alarm disabled
E1.1 Alarm Display sensor not connected
E1.2 Alarm Display sensor short circuit
E1.3 Alarm Display sensor reading error
E1.4 Warning Display sensor below reading range
E1.5 Warning Display sensor above reading range
E2.1 Alarm Heating sensor not connected
E2.2 Alarm Heating sensor short circuit
E2.3 Alarm Heating sensor reading error
E2.4 Warning Heating sensor below reading range
E2.5 Warning Heating sensor above reading range
E3.1 Alarm Cooling sensor not connected
E3.2 Alarm Cooling sensor short circuit
E3.3 Alarm Cooling sensor reading error
E3.4 Warning Cooling sensor below reading range
E3.5 Warning Cooling sensor above reading range
E4.1 Alarm Battery not connected
E4.2 Alarm Battery failure
E5.3 Warning Compressor error: motor start error
E5.4 Warning Compressor error: minimum motor speed error
E5.5 Warning Compressor error: thermal cut-off
E9.0 Alarm Communication error
E9.1 Alarm Parameter inconsistency
E9.2 Alarm Flash memory inconsistency
E9.3 Warning System hardware error

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5.2 Alarm messages
• In case of an alarm, all display areas start flashing and the related alarm code is shown in the display.
Furthermore the red Alarm LED on the display blinks and the buzzer sounds. The buzzer sound can be
muted by pressing the Mute button on the display. When the muting time is elapsed or a new alarm
situation comes up, the buzzer starts again.
• Temperature alarm - E0.1 / E0.2
If the internal temperature rises above the upper alarm limit or falls below the low alarm limit a
temperature alarm „E0.1“ or „E0.2“ is created. The temperature alarm persists even if the temperature is
in range again. It needs to be acknowledged by pressing and holding the reset button for 3 seconds. The
alarm situation is also cleared when switching the unit off and on again.
• Temperature reading error - E1.1 / E1.2 / E1.3 / E2.1 / E2.2 / E2.3 / E3.1 / E3.2 / E3.3
When one of the temperature values for proper temperature regulation or temperature display is not
available because of a reading error, the appropriate temperature sensor reading alarm is generated. The
fault can be a short circuit, an open circuit or an invalid resistor value on the reading input. The alarm
message E2 and E3 for heating and cooling sensor errors will disappear as soon as the alarm situation is
cleared. In case of a reading error on the sensor for the display temperature (E1), the alarm situation can
only be cleared by holding the reset button for 3 seconds.
• Battery failure / not connected - E4.1 / E4.2
As the battery is necessary for the correct daily use of the SDD unit, its presence is mandatory. When it
is not connected an alarm is created. When it is damaged (detected by a low voltage on the poles) another
alarm is created.
• Communication error - E9.0
When the communication between mainboard and display board is interrupted or the exchanged data is
inconsistent, the display board emits an alarm. The alarm disappears as soon as the communication is re-
established.
• Parameter inconsistency - E9.1 / Flash memory inconsistency - E9.2
A check of parameters and memory is done every time the unit is switched on. If anything goes wrong
during this check, an alarm is created.
5.3 Warning messages
• In case of a warning the related message is shown on max area of the display. The LED is not turned on.
Warnings are not displayed in case an alarm is active.
• Temperature alarm disabled - E0.3
The warning message „E0.3“ will be displayed in the max area of the display until the temperature has
once reached the preset range of +2°C to +6°C. During this startup phase the temperature alarm system
is deactivated.
• Temperature reading limit - E1.4 / E1.5 / E2.4 / E2.5 / E3.4 / E3.5
When the temperature value read on one sensor is outside the temperature reading range of -30.0 °C
to +50.0 °C, a warning is displayed. The message disappears as soon as the read value is in range
again.
• Compressor start error - E5.3
The compressor cannot start. Keep the unit switched on. This problem might occur if the solar generator
doesn’t deliver enough power (cloudy day, shadow on solar panels, bad positioning of solar panels etc.).
Check the actual situation of the panels, and if the problem persists after corrective actions, notify
Refrigerator Technician.

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• Minimum compressor speed error - E5.4
Keep the unit switched on. This problem might occur if the solar generator doesn’t deliver enough power
(cloudy day, shadow on solar panels, bad positioning of solar panels etc.). Check the actual situation of
the panels, and if the problem persists after corrective actions, notify Refrigerator Technician.
• Thermal cut-out of electronic unit - E5.5
The ambient temperature is too high, the electronic unit will run too hot. Switch the unit off. Switch it on
again after 1 hour. If the problem still persists, notify Refrigerator Technician.