Phcbi MDF-DU901VH User manual

Please read the operating instructions carefully before using this product, and keep the operating
instructions for future use.
See page 60 for model number.
MDF-DU901VH
Operating Instructions
Ultra-Low Temperature Freezer

2
CONTENTS
INTRODUCTION ................................................................................................................. 3
PRECAUTIONS FOR SAFE OPERATION ......................................................................... 4
SYMBOLS ON UNIT ........................................................................................................... 9
SAFETY ENVIRONMENTAL CONDITIONS ....................................................................... 9
FREEZER COMPONENTS............................................................................................... 10
Main body..................................................................................................................... 10
LCD touch panel........................................................................................................... 12
Locking/unlocking the outer door ................................................................................. 13
Remote alarm terminals ............................................................................................... 14
Air intake port (Manual) ................................................................................................ 14
INSTALLATION SITE ........................................................................................................ 15
INSTALLATION ................................................................................................................. 16
START-UP PROCEDURE ................................................................................................. 18
DURING/AFTER POWER FAILURE................................................................................. 19
Operation during power failure..................................................................................... 19
Operation after recovery from power failure ................................................................ 19
BASIC OPERATION ON LCD TOUCH PANEL................................................................. 20
BASIC PARAMETERS ...................................................................................................... 21
Entering numerical values and alphanumeric characters ............................................ 21
Setting Temperature, High Alarm and Low Alarm ........................................................ 23
Setting compressor delay time..................................................................................... 24
Setting key lock ............................................................................................................ 25
Cancelling key lock setting........................................................................................... 28
ALARM PARAMETERS..................................................................................................... 29
OPERATION/ALARM LOG ............................................................................................... 31
Setting log interval........................................................................................................ 31
Displaying operation log............................................................................................... 32
Exporting operation log ................................................................................................ 35
Displaying alarm log ..................................................................................................... 38
Exporting alarm log ...................................................................................................... 40
OTHER PARAMETERS .................................................................................................... 43
Setting date and time ................................................................................................... 43
Setting brightness and sleep........................................................................................ 44
ALARMS AND SELF-DIAGNOSIS.................................................................................... 46
ROUTINE MAINTENANCE ............................................................................................... 49
Cleaning the exterior, interior, and accessories ........................................................... 49
Cleaning the air intake port (Manual) ........................................................................... 49
Cleaning the condenser filter ....................................................................................... 50
Defrosting the chamber ................................................................................................ 51
CALIBRATION................................................................................................................... 51
REPLACEMENT OF CONSUMABLE PARTS .................................................................. 52
Replacing the battery for power failure alarm .............................................................. 52
Replacing the battery for backup cooling kit ................................................................ 52
TROUBLESHOOTING ...................................................................................................... 53
DISPOSAL OF UNIT ......................................................................................................... 55
Recycle of battery......................................................................................................... 55
Temperature recorder................................................................................................... 56
Small inner doors ......................................................................................................... 56
Inventory rack............................................................................................................... 56
Back-up cooling kit ....................................................................................................... 57
SETTING OF SHELF STOPPERS WHEN USING INVENTORY RACKS........................ 58
SPECIFICATIONS............................................................................................................. 59
PERFORMANCE............................................................................................................... 60
SAFETY CHECK SHEET.................................................................................................. 61

3
INTRODUCTION
■Read the operating instructions carefully before using the product and follow the instructions for safe
operation.
■PHC Corporation takes no responsibility for safety if the product is not used as intended or is used with
any procedures other than those given in the operating instructions.
■Keep the operating instructions in a suitable place so that they can be referred to as necessary.
■The operating instructions are subject to change without notice for improvement of performance or
function.
■Contact our sales representative or agent if any page of the operating instructions is lost or the page
order is incorrect, or if the instructions are unclear or inaccurate.
■No part of the operating instructions may be reproduced in any form without the express written
permission of PHC Corporation.
IMPORTANT NOTICE
PHC Corporation guarantees this product under certain warranty conditions. However, please note that
PHC Corporation shall not be responsible for any loss or damage to the contents of the product.
<Intended Use>
This equipment is designed for storage of blood and blood products.

4
PRECAUTIONS FOR SAFE OPERATION
It is imperative that the user comply with the operating instructions as
they contain important safety advice.
Items and procedures are described so that you can use this unit correctly and safely.
Following these precautions will prevent possible injury to the user and any other
person.
Precautions are illustrated in the following way:
WARNING
Warning indicates a potentially hazardous situation which, if not avoided,
could result in serious injury or death.
CAUTION
Failure to observe CAUTION signs could result in injury to personnel and
damage to the unit and associated property.
Symbols have the following meanings:
This symbol means caution.
This symbol means an action is prohibited.
This symbol means an instruction must be followed.

5
PRECAUTIONS FOR SAFE OPERATION
Do not use the unit outdoors. Exposure to rain may cause leakage and/or electric shock.
Only qualified engineers or service personnel should install the unit. Installation by unqualified
personnel may cause electric shock or fire.
Install the unit in a location capable of bearing the total combined weight (product + optional
accessories + stored items). After installing the unit, be absolutely sure to take precautions
to prevent the unit from falling over. If the unit is installed in a location which is not strong enough
or if the proper precautions are not taken, the unit may fall over and cause injuries.
Turn the leveling feet to separate the casters from the floor and secure the unit. If they are left
touching the floor, the unit may inadvertently move out of position when its door is opened or
closed. It may cause injury.
Do not install the unit where there are high levels of moisture or where it may be splashed with
water. Installing the unit where there are high levels of moisture or where it may be splashed with
water may cause the insulation to deteriorate and give rise to leakage and/or electric shock.
Do not install the unit in a location where flammable or volatile substances are present.
Installing the unit in a location where flammable or volatile substances are present may cause
explosions and/or a fire.
Do not install the unit in a location where corrosive gases such as acids are present. Installing
the unit in a location where corrosive substances are present may cause electrical components to
corrode, leading to leakage and/or electric shock due to the deterioration of insulation resulting from
corroded electrical components.
Do not place this unit in a location where it is difficult to disconnect the power supply plug.
Failure to disconnect the power supply plug may cause fire in the event of a problem or malfunction.
Be absolutely sure to earth (ground) the unit to prevent electric shock. Failure to earth the
product may give rise to electric shock. If necessary, ask a qualified contractor to do this work.
Do not connect the earth wire to a gas pipe, water pipe or lightning rod when earthing the
unit. Earthing the unit improperly may give rise to electric shock.
Connect the unit to a power source as indicated on the rating label attached to the unit. Use
of any other voltage or frequency other than that on the rating label may cause fire or electric shock.
Never store volatile or flammable substances in this unit except in a sealed container. Such
substances may cause explosion or fire if they leak.
Never insert metal objects such as pins and wires into any vent, gap, or outlet on the unit.
This may cause electric shock or injury by accidental contact with moving parts.
WARNING

6
PRECAUTIONS FOR SAFE OPERATION
When handling harmful samples (for example, those which consist of toxic, pathogenic or
radioactive substances), install the unit inside a designated isolation facility. If the unit is
installed in a location which is not an isolation facility, there may be detrimental effects on both people
and the natural environment.
Before proceeding with maintenance or checking the unit, set the power switch to OFF, and
disconnect the power supply plug. Performing the work while power is still flowing to the product
or while the power supply plug is still connected may give rise to electric shock and/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.
Wear protective gloves and mask during maintenance. Touching or inhaling chemicals or
aerosols from around the unit may be detrimental to health.
Never splash water directly onto the unit as this may cause electric shock or short circuit.
Never put containers with liquid on top of the unit as this may cause electric shock or short circuit
if the liquid is spilled.
Never damage the power supply cord or power supply plug (by breaking, adapting, placing
near a source of heat, bending with force, twisting, pulling, adding weight, or binding). A
damaged power supply cord or power supply plug may cause electric shock, short circuit, or fire.
Never disassemble, repair, or modify the unit yourself. A high-voltage area is located inside the
unit. Any work carried out by unauthorized personnel may result in electric shock. Contact our
sales representative or agent for maintenance or repair.
Make sure the power supply plug is pushed fully in. Faulty insertion of the power supply plug
may cause electric shock or fire due to generation of heat. Never use a damaged power supply plug
or loose power outlet.
Disconnect the power supply plug if there is anything wrong with the unit. Continued abnormal
operation may cause electric shock or fire.
Grip the power supply plug when disconnecting the power supply cord from the outlet.
Pulling the power supply cord may cause electric shock or short circuit.
Remove dust from the power supply plug periodically. Dust on the power supply plug may
cause insulation failure due to moisture and thus cause a fire. Disconnect the power supply plug and
wipe it with a dry cloth.
WARNING

7
PRECAUTIONS FOR SAFE OPERATION
Disconnect the power supply plug before moving the unit. Take care not to damage the power
supply cord. A damaged power supply cord may cause electric shock or fire.
Disconnect the power supply cord when the unit is not in use for long periods. Keeping the
unit connected may cause electric shock, leakage, or fire due to the deterioration of insulation.
If the unit is to be stored unused in an unsupervised area for a long period, ensure that children do
not have access and that doors cannot be closed completely.
Ask a qualified contractor to carry out disassembly and disposal of the unit. Leaving the unit in
a location that can be accessed by third parties may result in unexpected accidents (e.g. the unit may
be used for unintended purposes).
Do not leave the plastic bags used for packing in a place where they can be reached by small
children as this may result in unexpected accidents such as suffocation.
Never replace the battery for the power-failure alarm yourself. Only qualified engineers or
service personnel should replace the battery.
When moving the unit, be sure to take precautions to prevent it from falling over. Moving the
unit with too much force may cause it to fall over, possibly resulting in injury. A qualified individual
must be assigned to supervise the safe movement and relocation of the unit.
Install the unit in a well-ventilated (airy) location to prevent the accumulation of flammable
refrigerant. The flammable refrigerant may cause fire if it leaks.
Never damage the chamber wall or pipework in the chamber when removing frost. The
refrigerant is flammable and may cause a fire if it leaks.
Flammable and explosive product. The unit contains flammable refrigerant. When repairing or
recycling, only trained service personnel will repair and follow the procedure below.
Well ventilate the room to prevent refrigerant accumulation.
Keep fire away when the refrigerant is contained in the product.
Do not damage or break the pipework.
Do not use equipment or other measures for facilitating the defrosting work. It may cause
explosions and/or a fire in case of refrigerant leakage.
As with any equipment that uses CO2gas, 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 lack of ventilation is suspected, then other methods of ensuring a safe environment
must be considered. These may include atmosphere monitoring systems and warning devices with
alarms.
Do not touch the condenser directly when the filter is removed for cleaning. Touching the
condenser may cause injury due to its hot surface.
WARNING

8
PRECAUTIONS FOR SAFE OPERATION
Never install the unit in a location where corrosive materials such as sulphur compounds are
likely to be generated (e.g. near a drainage facility). Corrosion of the copper pipes may result in
the deterioration and consequently the failure of the cooling unit.
This unit must be plugged into a dedicated circuit protected by branch circuit breaker.
Use a dedicated power source as indicated on the rating label attached to the unit. A
multiple-tap may cause fire resulting from abnormal heating.
Do not climb on top of the unit or put any objects on the unit. Falling from the unit may cause
injury; falling objects may cause damage to the unit.
Never store corrosive substances such as acids or alkalis in this unit except in a sealed
container. These may be harmful to your health and may cause corrosion of internal components or
electrical parts.
Check the settings when restarting operation after a power failure or after turning the power off.
The settings may have changed as a result of stopping the unit. Stored items inside the unit may be
adversely affected when operation is resumed if the settings have changed.
To ensure the safety of the service engineer, submit a safety check sheet with the required
items filled out. This is provided as the photocopiable “Safety Check Sheet” at the end of these
operating instructions.
Use designated parts for parts replacement. Using an incorrect part may cause fire.
Do not give strong shock or vibration during movement or use. The piping may be damaged,
causing a fire.
Flammable and explosive product. The unit contains flammable refrigerant. Consult repair
manual/owner’s guide before attempting to install or service this product. All safety precautions must
be followed.
Flammable and explosive product. Dispose of properly in accordance with federal or local
regulations. Flammable refrigerant used.
To prevent frostbite, wear protective gloves when handling frozen items in the chamber. Too
much frost may cause chamber temperature rise resulting from incomplete door close.
Clean the filter about every once a month. A dusty filter may cause poor cooling performance.
Please remove the frost on the air intake. When removing, please use the accessory's stick for air
intake port cleaning.
CAUTION

9
SYMBOLS ON UNIT
The following symbols are attached to the unit.
This symbol indicates possibility of an electric shock. High-voltage electrical
components are placed under the covers. Only a qualified engineer or service
personnel should be allowed to open these covers.
This symbol indicates that caution is required. Refer to product documentation for
details.
This symbol indicates incorrect usage could lead to a fire hazard.
This symbol indicates an earth.
This symbol means “ON” for a power switch.
This symbol means “OFF” for a power switch.
SAFETY ENVIRONMENTAL CONDITIONS
This equipment is designed to be safe at least under the following conditions (based on the IEC 61010-1):
■Indoor use;
■Altitude up to 2,000 m;
■Temperature 5 °C to 40 °C;
■Maximum relative humidity 80 % for temperature up to 31 °C decreasing linearly to 50 % relative
humidity at 40 °C;
■Mains supply voltage fluctuations up to ±10 % of the nominal voltage;
■Transient overvoltages up to the levels of OVERVOLTAGE CATEGORY II;
■Temporary OVERVOLTAGES occurring on the mains supply;
■Applicable pollution degree of the intended environment (POLUTION DEGREE 2 in most cases);
* The above conditions do not indicate the performance of this product. For the performance of this
product, refer to the "PERFORMANCE" section.

10
FREEZER COMPONENTS
Main body
*1 : When an optional backup cooling kit is installed.
7
19
13
17
18
5
16*1 15*1 14*1
20
10
10
Door gaske
t
4
2
1
Outer door
6
8
9
・ON
OFF
＋
POWER
3
11
12

11
FREEZER COMPONENTS
1. Inner door latch: When the inner door is closed, it should be locked by this latch.
2. Inner door: The operation of the inner door should be quick to minimize the temperature rise in the
chamber. Lock the inner door latch completely when the inner door is closed. The inner door can be removed
for cleaning or defrosting [page 51].
3. Outer door latch: When closing the outer door, push the latch until the latch is locked in place.
Provision has been made for use of an additional padlock (not included).
4. Key slot: The outer door can be locked using the accessory key and the lock system on the outer door
latch [page 13].
5. Air intake vent (grille): Do not block this vent to keep the proper cooling performance.
6. Leveling feet: These are screw bolts used to install and fix the unit. Adjust the height of the leveling
feet by turning the screw bolts until 2 front casters are away from the floor [page 16].
7. Caster: Four casters are provided to facilitate moving of the freezer. For the installation, adjust the
leveling feet so that the front 2 casters cannot contact the floor.
8. Condenser filter (behind the grille): Prevents the dust from accumulating on the condenser. A dusty
condenser filter may cause failure of the freezer. Clean the condenser filter once a month [page 50].
9. Space for temperature recorder: Optional temperature recorder can be mounted here so that the
chamber temperature can be recorded automatically [page 60].
10. Access ports (rear and bottom): Used to route the sensor/cable of measuring equipment, the
sensor of a temperature recorder (optional), or the nozzle of a back-up cooling kit (optional) into the
chamber.
11. Air intake port (Manual): The pressure difference between inside and outside of the chamber can be
manually adjusted to open the outer door smoothly [page 14].
12. Fixtures (on back side): For securing the unit to a wall with a strong rope or chain [page 16].
13. Power switch: Power switch of the freezer unit. (ON=“l”,OFF=“○”)
14. Temperature setting knob (TEMP. SET)*: Used to set the injection start temperature of the backup
cooling kit [page 57].
15. Backup power switch (BACK UP)*: Power switch of the backup cooling kit [page 57].
16. Backup test switch (TEST)*: Used to confirm that the backup cooling kit can inject liquid CO2[page
57].
17. Remote alarm terminals: An external remote alarm device (separately available) can be connected
to these terminals. The alarm is relayed to an operator in a remote location when the unit is unattended
[page 14].
18. Battery switch for power failure alarm: Switch for turning ON/OFF the battery for power-failure
alarm. Always turn this switch on when the unit is operating to ensure that the power-failure alarm is
working. Turn this switch off when the unit is not used for a long period in order to protect the battery.
19. LCD touch panel: See pages 12 - 13.
20. USB port:
USB flash drive is inserted here when exporting operation logs and alarm logs [pages 35 - 42].
Note: USB flash drives with capacity of 32 GB or less that employ the FAT16/FAT32 file system are
supported. USB flash drives that require passwords cannot be used. Do not insert devices other than
USB flash drives into the USB port.
* When an optional backup cooling kit is installed.

12
FREEZER COMPONENTS
LCD touch panel
When the power switch is turned ON, the following screen (called as Top screen) will appear.
Note: It takes approximately 20 seconds until the Top screen is displayed.
1 2 3
1. Current temperature display field: The current chamber temperature is displayed.
Note: Value rounded to the nearest integer is displayed.
2. Temperature setpoint display field: The set value of chamber temperature is displayed. Default
setting: -80 °C.
3. Current date/time display field: Current date and time is displayed here. The date and time has been
temporarily set at the factory. For details about setting the data and time, refer to page 43.
4. Filter alarm indicator: This indicator is lit when the excessive dust is accumulated on the condenser
filter. When this indicator is lit, clean the condenser filter by following the procedure in page 50.
5. Alarm display field: [pages 46 - 47]
Normal condition: “Normal” is displayed.
Alarm-activated, buzzer-delayed: “Alarm” is displayed alternately in normal and reverse video.
Alarm-activated, buzzer-sounding: “Warning” is displayed alternately in normal and reverse video.
6. Door (opening/closing) display field:
Open: “Open” is displayed alternately in normal and reverse video.
Close: “Closed” is displayed.
7. Backup display field: (displayed only when the optional backup cooling kit is installed)
ON/OFF status of the backup power switch is displayed [page 57].
ON: “Switch ON” is displayed.
OFF: “Switch OFF” is displayed.
*1: When an optional backup cooling kit is installed.
4
5
6
7*1

13
FREEZER COMPONENTS
8. Message display field: The information of the operation monitor system, the alarm, or the status is
displayed in the event of failure [pages 46 -47].
9. Message select keys: When there are multiple messages concerning to the alarms, the status or the
information of the operation monitor system, pressing these keys can switch to another message.
10. Menu key: Pressing this key displays the Menu screen where you can configure various settings
[page 20].
11. Buzzer key: Pressing this key stops the buzzer sound. However, when the ring back is ON, the
buzzer will sound again if the preset amount of time has elapsed after this key was pressed and the alarm
state still continues [pages 29 - 30 and 48].
Locking/unlocking the outer door
The outer door can be locked using the accessory key and the lock system on the outer door latch.
1. Locking the door
Insert the key into the key slot and turn it 45 degrees clockwise (to the
position marked with ). After the door is locked, turn the key back
to the first position and take it out of the lock system.
2. Unlocking the door
Insert the key into the key slot and turn it 45 degrees counterclockwise
(to the position marked with ). After the door is unlocked, turn the
key back to the first position and take it out of the lock system.
Notes:
• After locking/unlocking the door, be sure to take the key out of the key slot and store and manage it in a
safe place.
• If the key is lost, contact our sales representative or agent and provide the number stamped in the metal
near the key slot.
9
10
11
8

14
FREEZER COMPONENTS
Remote alarm terminals
The alarm condition of this unit can be transferred to a remote location by connecting an external alarm
device to the remote alarm terminals. For the type and behavior of remote alarm output, refer to pages 46
- 47.
The terminals for the remote alarm are provided at the right
side of the unit (see the right figure). The alarm is output from
these terminals. Contact capacity is DC 30 V, 2 A.
Table.1 shows the terminal status and the behavior of the
remote alarm when the Buzzer key is pressed.
Notes:
• For the door alarm, remote alarm function does not activate
[page 47].
• It is recommended to use standard signal and interface cables
with a maximum length of 30 meters.
Table 1 Terminal status and behavior of remote alarm when Buzzer key is pressed
Remote Alarm setting
[pages 29 – 30]
Connecting
terminal
Normal
condition
Abnormal condition
(Including in the case of power outage and
when power plug is pulled out.)
When Buzzer key is pressed
ON:
Not linked with Buzzer key
COM.-N.C. Close Open Open (still abnormal)
COM.-N.O. Open Close Close (still abnormal)
OFF:
Linked with Buzzer key
COM.-N.C. Close Open Close (Return to normal)
COM.-N.O. Open Close Open (Return to normal)
Air intake port (Manual)
Normally, the pressure difference between inside and outside of the chamber is automatically adjusted for the
smooth opening of the outer door.
However, when the door is heavy and difficult to open, follow the procedure below.
1. Turn the cap on the left side counterclockwise about two turns
(or remove the cap).
2. Allow about twenty seconds before opening the outer door.
3. Close (or replace) the cap after the door operation is
completed.
Note:
To check for the frost accumulation inside the air intake port,
remove the cap on the air intake port.
If excessive frost has built up in the air intake port, remove with a
"Stick for air intake port cleaning" [page 49].
CAUTION
For removing the frost in the air intake port, do not use a tool with sharp edge such as a knife or a screw
driver.
Remote alarm terminals
About 2 turns
Cap

15
INSTALLATION SITE
This unit must be installed in a location which meets all the conditions described below.
If the unit is installed in a location which does not meet the conditions, its specified performance may
not be achieved or malfunctions and accidents may occur.
■A location not exposed to direct sunlight
Avoid any location which is exposed to direct sunlight. Installing the unit in a location exposed to direct
sunlight may reduce its cooling performance.
■A well-ventilated (airy) location
In order to ensure ventilation, leave clearances of at least 10 cm around the unit (at the left, right, top and
back). Blocking the ventilation may reduce the unit’s cooling performance or cause malfunctions.
■A location away from sources of heat
Avoid any location which is close to a major source of heat (such as a heater or boiler). Installing the
unit near a major source of heat may reduce the unit’s cooling performance.
■A location with minimal changes in temperature
Avoid any location where the ambient temperature is subject to sudden changes. If the unit is installed
in a location where the ambient temperature is subject to sudden changes, stable cooling performance
may not be achieved. The ambient temperature for using this product is +5 °C to +30 °C.
■A firm and level location where the floor can bear the total combined weight (product + optional
accessories + stored items)
Install the unit on a level surface which is capable of bearing the total combined weight (product +
optional accessories + stored items). If the unit is installed in the location where the floor surface is
uneven or where the unit will be inclined at an angle, the unit will be unstable, and accidents or injuries
may occur and/or unnecessary vibration or noise may be generated.
■A location with minimal humidity
Install the unit in a location where the relative humidity is 80 %R.H. or lower. Installing the unit in a very
humid location may cause earth faults and/or electric shock.
■A location free of flammable or corrosive gases
Avoid any location exposed to flammable or corrosive gases. Flammable or corrosive gases can cause
explosions and/or a fire. Furthermore, corrosion of the electrical parts may cause the insulation to be
reduced and result in earth faults and/or electric shock.
■A location where nothing can fall onto the unit
Avoid locations where objects may fall onto the unit. Objects falling and hitting the unit may cause it to
break down or fail.

16
INSTALLATION
When installing the unit, follow the steps below to secure the unit properly, and also be absolutely sure to
earth the unit.
In addition, install an earth leakage circuit breaker (on the unit’s power supply side), which is mandatory
under the applicable laws and regulations.
1. Preparations after unpacking
Remove all the tape used to secure the doors and interior parts, and leave the doors open for a short
while for ventilation.
If any outer surfaces of the freezer are dirty, wipe the surfaces using a cloth moistened with a diluted
neutral dish-washing detergent.
Using an undiluted solution of detergent may cause the unit’s plastic areas to crack. Follow the
directions on the detergent for details of dilution.
After wiping the unit using the diluted detergent, be absolutely sure to wipe the surfaces with a cloth
dipped in clean water to remove traces of the detergent. After this, be absolutely sure to wipe the
surfaces with a dry cloth, allowing the outer surfaces of the freezer to dry out completely, and then
proceed with the installation.
Note:
Remove the cable tie that bands the power supply cord. Prolonged contact with the tie may cause
corrosion of the cord coating.
2. Securing and levelling the unit using the levelling feet
Rotate the front levelling feet clockwise until the casters
are raised 5 mm to 10 mm above the floor surface. (Fig. 1)
In addition, rotate the levelling feet slightly clockwise or
anticlockwise to adjust them so that the unit is completely
level.
The unit becomes stable with the casters not contacting
the floor. If the casters are left in contact with the floor, the
unit may accidentally move when its door is opened or
closed.
3. Securing the unit using fixtures
Use the fixtures on the back panel of the unit, and secure
the unit to the wall by passing a strong rope or chain
through the fixtures (Fig. 2).
Fig. 2
Fixture
Fig.1
Levelling feet
Shorten
Lengthen

17
INSTALLATION
4. Preventing electric shock by earthing the unit
When installing the unit, be absolutely sure to earth (ground) it. Earthing is necessary to prevent electric
shock resulting from deterioration of electrical insulations.
This unit comes with a 3-pin plug having one earth pin. Earthing work is not required in the case of a
3-pin power outlet equipped with an earth contact.
If the power outlet is not a 3-pin outlet equipped with an earth contact, ask a qualified contractor to do the
earthing work.
5. Setting up the shelves
Insert the shelf stoppers into the bores of the pilasters at
the desired level and set the shelf firmly on the shelf
stoppers (Fig. 3).
When using the optional inventory racks, insert the shelf
stoppers into the bores at the positions of the pilasters
described in “SETTING OF SHELF STOPPERS WHEN
USING INVENTORY RACKS (page 58)” and set the
shelves on the shelf stoppers.
6. Installing an earth leakage circuit breaker
Install an earth leakage circuit breaker (on the unit’s power supply side), which is mandatory under the
applicable laws and regulations.
Contact our sales representative or agent to arrange the installation of an earth leakage circuit breaker.
Shelf stopper
Fig. 3
Pilaster ① Insert the upper tab of the
shelf stopper into the bore
of the pilaster at the desired
level.
② Put the lower notched part of
the shelf stopper into the bore
just below the position
mentioned above.

18
START-UP PROCEDURE
Follow the procedure below for the initial operation of the unit and for operations of the unit after
temporary stoppage for cleaning, maintenance or moving.
After a power failure, the unit will restart operation automatically with the same settings as before the
power failure [page 19].
1. Check that the following switches are turned off: power switch, battery switch for power failure alarm,
switch for the optional back-up cooling kit (if installed).
Note: Power failure alarm will activate if the battery switch for power failure alarm is turned on when the
power to the freezer is turned off.
2. Without putting anything into the chamber, connect the power supply cord to the dedicated outlet.
3. Turn on the power switch for the unit to start operation of the unit.
4. Turn on the battery switch for power failure alarm.
Note: When the battery switch for power failure alarm is OFF, the message “S20: Battery Inactive, SW
may be OFF.” is displayed in the message display field. This message disappears when the battery
switch for power failure alarm is turned ON.
5. Set the desired chamber temperature [pages 23 - 24].
The factory setting of chamber temperature is -80 °C.
6. Using the temperature display, check that the chamber temperature has cooled to the set
temperature.
Check that the chamber temperature falls to the set temperature when the start-up after cleaning,
maintenance or moving.
7. Turn on the switch of the optional back-up cooling kit (if installed).
8. Do the alarm test. Check that the buzzer sounds by pressing the Buzzer key for 5 seconds. Press the
Buzzer key again to stop the buzzer and finish the alarm test.
9. Press the test switch for the optional back-up cooling kit (if installed) to check it is working.
10. Gradually place the material inside the chamber.
Putting a large amount of material into the chamber at one time causes the temperature to rise.
11. Set all parameters (alarm setting, log setting, etc.) as necessary.
Notes:
• When closing the outer door, push the latch until the latch is locked in place. Insufficient pushing can
cause temperature rise in the chamber.
• In case some optional inventory racks are in the chamber, be careful not to drop inventory rack when
pulling it out.

19
DURING/AFTER POWER FAILURE
Operation during power failure
When the battery switch for power failure alarm is ON, the unit behaves as follows during a power failure.
●The power failure alarm is activated [page 46].
Press the Buzzer key to silence the buzzer sound of the power failure alarm. In case the ring back is
turned ON, buzzer sounds again when a power failure still continues after ring back set time elapsed
[page 30].
●LCD touch panel becomes dark [page 46].
By touching the LCD touch panel, it becomes brighter for 5 seconds.
●The High/Low Alarm can activate even during a power failure [pages 23 - 24 and 46].
When High/Low Alarm activates, an alarm message is displayed on the message display field. At this point,
the buzzer and the remote alarm have activated, and "Warning" is displayed on the Alarm display field since
the power failure alarm has already activated.
●The clock function does not stop.
●Operation log data and alarm log data during a power failure is saved.
Note: When the capacity of the battery for power failure alarm is flat during a power failure, subsequent
operation log data and alarm log data is not saved.
Operation after recovery from power failure
During a power failure, the setting values are stored in the nonvolatile memory. Therefore, the freezer
resumes the operation using the setting values before the power failure.
Notes:
• It may take up to 1 minute until the LCD touch panel lights after recovery from a power failure.
• Since all devices will start up at the same time at the recovery from a power failure, the temporary
voltage drop may have an adverse effect on the starting of the unit. To prevent this situation, set the
appropriate compressor delay time for the unit [pages 24 - 25].
Although the power failure alarm is canceled at the
recovery from the power failure, buzzer sounds
and “Alarm” is displayed alternately in normal and
reverse video in the Alarm display field in order to
remind that power failure had happened [page 48].
By pressing the Buzzer key, the Alarm display field
returns to “Normal” and the buzzer sound stops.
Note: You can check the previous alarms by
following the procedure described in the
“Displaying alarm log” [pages 38 - 39].

20
BASIC OPERATION ON LCD TOUCH PANEL
♦Message select key:
(Operation) Switches messages
♦Buzzer key: (Operation) Stops the buzzer sound
(Alarm is not canceled except for some alarms; page 48)
●Menu items on Menu screen
■Menu screen Page
♦Set →■Temp. Setting screen (Setting) Temp., High Alarm, Low Alarm 23~24
♦Log →■Log screen
♦Chart →■Chart screen
♦Actual Temp. (Display) Chamber temp. log graph (can be exported) 32~34
♦Door Opening (Display) Door opening log graph (can be exported) 32~34
♦Data
Export
→■Export screen
♦Actual Temp. (Export) Chamber temperature log 35~37
♦Door Opening (Export) Door opening log 35~37
♦Setting (Setting) Log interval, Unique ID 31~32
♦Alarm (Display)
A
larm log (can be exported) 38~39
♦Alarm Export (Export)
A
larm log 40~41
♦Key Lock →■Key Lock screen (Setting) Key lock ON/OFF, password 25~28
♦Tools →■Tools screen
♦Operation Setting (Setting) Comp. delay time 24~25
♦Alarm Setting (Setting)
A
larm delay, ring back, remote alarm etc. 29~30
♦DAQ Setting Do not press (unavailable)
♦Date & Time (Setting) Date, time 43
♦Brightness/Sleep (Setting) Brightness, sleep ON/OFF etc. 44~45