Panasonic MDF-C8V1 Series User manual

Please read these instructions carefully before using this product, and save this operating instructions
for future use.
See page 38 for all Model Numbers.
MDF-C8V1 Series 
MDF-C8V1 
Ultra-Low Temperature Freezer
Operatin
g
Instructions

1
CONTENTS
INTRODUCTION P. 2
PRECAUTIONS FOR SAFE OPERATION P. 3
ENVIRONMENTAL CONDITIONS P. 7
FREEZER COMPONENTS P. 8
Control panel P. 10
INSTALLATION SITE P. 11
INSTALLATION P. 12
START-UP OF UNIT P. 13
CHAMBER TEMPERATURE SETTING P. 14
KEY LOCK FUNCTION P. 14
FUNCTION MODE P. 15
ALARM TEMPERATURE SETTING P. 15
SETTING OF ALARM RESUME TIME P. 17
CHANAGE OF COMPRESSOR DELAY TIME P. 18
REMOTE ALARM TERMINAL P. 19
ALARMS & SAFETY FUNCTIONS P. 20
ROUTINE MAINTENANCE P. 21
Cleaning of cabinet P. 21
Defrosting P. 21
Battery P. 22
REPLACEMENT OF BATTERY P. 23
TROUBLESHOOTING P. 24
DISPOSAL OF UNIT P. 25
Recycle of battery P. 25
TEMPERATURE RECORDER (OPTION) P. 30
Installation of MTR-85H P. 31
Installation of MTR-G85A/MTR-G85C P. 33
BACKUP COOLING KIT (OPTION) P. 35
SPECIFICATIONS P. 37
PERFORMANCE P. 38
SAFETY CHECK SHEET P. 39

2
INTRODUCTION
Read this operating instructions carefully before using the appliance and follow the instructions for
safety operation.
Our company never guarantee any safety if the appliance is used for any objects other than intended
use or used by any procedures other than those mentioned in this operating instructions.
Keep this operating instructions in an adequate place to refer to it as necessary.
The contents of the operating instructions will be subjected to change without notice due to the
improvement of performance or functions.
Contact our sales representative or agent if any page of the operating instructions is lost or page order
is incorrect.
Contact our sales representative or agent if any point in this operating instructions is unclear or if there
are any inaccuracies.
No part of this operating instructions may be reproduced in any form without the expressed written
permission of our company.
CAUTION
Our company guarantees the product under certain warranty conditions. Our company in no
way shall be responsible for any loss of content or damage of content.

3
PRECAUTIONS FOR SAFE OPERATION
It is imperative that the user complies with this operating instructions
as it contains important safety advice.
Items and procedures are described so that you can use this unit correctly and safely.
If the precautions advised are followed, this will prevent possible injury to the user and
any other person.
Precautions are illustrated in the following way:
WARNING
Failure to observe WARNING signs could result in a hazard to personnel
possibly resulting 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.
Symbol shows;
this symbol means caution.
this symbol means an action is prohibited.
this symbol means an instruction must be followed.
Be sure to keep this operating instructions in a place accessible to users of this unit.
< Label on the unit >
This mark is labeled on the cover in which the electrical components of high voltage
are enclosed to prevent the electric shock.
The cover should be removed by a qualified engineer or a service personnel only.
WARNING
As with any equipment that uses CO
2
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.

4
PRECAUTIONS FOR SAFE OPERATION
Do not use the unit outdoors. Current leakage or electric shock may result if the unit is exposed to
rain water.
Only qualified engineers or service personnel should install the unit. The installation by
unqualified personnel may cause electric shock or fire.
Install the unit on a sturdy floor and take an adequate precaution to prevent the unit from
turning over.
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 in a humid place or a place where it is likely to be splashed by water.
Deterioration of the insulation may result which could cause current leakage or electric shock.
Never install the unit in a flammable or volatile location.
This may cause explosion or fire.
Never install the unit where acid or corrosive gases are present as current leakage or electric
shock may result due to corrosion.
Always ground (earth) the unit to prevent electric shock. If the power supply outlet is not
grounded, it will be necessary to install a ground by qualified engineers.
Never ground the unit through a gas pipe, water main, telephone line or lightning rod. Such
grounding may cause electric shock in the case of an incomplete circuit.
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 if the container cannot be sealed. These
may cause explosion or fire.
Do not insert metal objects such as a pin or a wire into any vent, gap or any outlet on the unit.
This may cause electric shock or injury by accidental contact with moving parts.
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.
Turn off the power switch (if provided) and disconnect the power supply to the unit prior to any
repair or maintenance
of the unit 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.
WARNING

5
PRECAUTIONS FOR SAFE OPERATION
Ensure you do not inhale or consume medication or aerosols from around the unit at the time of
maintenance. These may be harmful to your health.
Never splash water directly onto the unit as this may cause electric shock or short circuit.
Never put containers with liquid on the unit as this may cause electric shock or short circuit when
the liquid is spilled.
Never bind, process, or step on the power supply cord, or never damage or break the power
supply plug.
A broken supply cord or plug may cause fire or electric shock.
Do not use the supply cord if its plug is loose.
Such supply cord may cause fire or electric shock.
Never disassemble, repair, or modify the unit yourself.
Any such work carried out by an
unauthorized person may result in fire, or electric shock or injury due to a malfunction.
Disconnect the power supply plug if there is something wrong with the unit. Continued
abnormal operation may cause electric shock or fire.
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.
Disconnect the power supply plug before moving the unit. Take care not to damage the power
cord. A damaged cord may cause electric shock or fire.
Disconnect the power plug when the unit is not used for long periods. Keeping the connection
may cause electric shock, current leakage, or fire due to the deterioration of insulation.
If the unit is to be stored unused in an unsupervised area for an extended period, ensure that
children do not have access and that doors cannot be closed completely.
The disposal of the unit should be accomplished by appropriate personnel. Remove doors to
prevent accidents such as suffocation.
Do not put the packing plastic bag within reach of children as suffocation may result.
WARNING

6
PRECAUTIONS FOR SAFE OPERATION
Use a dedicated power source (a dedicated circuit with a breaker) as indicated on the rating label
attached to the unit. A branched circuit may cause fire resulting from abnormal heating.
Connect the power supply plug to the power source firmly after removing the dust on the plug.
A dusty plug or improper insertion may cause a heat or ignition.
Never store corrosive substances such as acid or alkali in this unit if the container cannot be
sealed. These may cause corrosion of inner components or electric parts.
Check the setting when starting up of operation after power failure or turning off of power
switch.
The stored items may be damaged due to the change of setting.
Be careful not to tip over the unit
during movement to prevent damage or injury.
Prepare a safety check sheet
when you request any repair or maintenance for the safety of service
personnel.
CAUTION

7
ENVIRONMENTAL CONDITIONS
This equipment is designed to be safe at least under the following conditions (based on the IEC61010-1):
Indoor use;
Altitude up to 2000 m;
Ambient temperature 5
o
C to 40
o
C;
Maximum relative humidity 80% for temperature up to 31
o
C decreasing linearly to 50% relative humidity
at 40
o
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)

8
FREEZER COMPONENTS
1 2
3
10
9 8
5
4
6
7
11
12
5
14
13
15

9
FREEZER COMPONENTS
1. Lock: By turning to 180 degree to clockwise with a key, the door can be locked.
2.
Door: Top hinged type. To open the door, grip the handle.
3. Door gasket: Seals the door and prevents leakage of cold air.
4. Inner lid: Serves as a means of reducing cold air leakage when the door is open. Remove the frost
regularly.
5. Access port: Located on the back side and bottom. These are used for leading the measuring
cable from the freezing chamber to the outside. The bottom port is also used for passing the
temperature sensor.
6. Space for temperature recorder:
An automatic temperature recorder (optional part) can be attached
here. See page 30 “Temperature recorder (option)”.
7. Control panel:
The temperature setting keys etc. are located. See page 10 for details.
8. Intake air vent:
Be careful not to block this.
9. Leveling foot:
Serves to adjust the height and to settle the frame evenly.
10. Caster:
4 casters are provided for easy movement.
11. Fixture (back side):
A fixture is attached to the rear of the frame. Fix the frame to the wall with this
fixture and rope or chain.
12. Remote alarm terminal (back side): Used to notify an alarm condition of the unit to remote location.
See page 19 for details.
13. Battery switch (back side): Switch for battery used for power failure alarm. Always keep ON.
Turn the switch OFF when the unit is in no use for a long period (more than 1 month).
14. Space for optional component: An interface board (optional component) can be attached here.
15. Power switch: A switch for supplying/disconnecting the power to the freezer.

10
FREEZER COMPONENTS
Control panel
1. Digital temperature indicator (TEMPERATURE):
This indicator shows the present chamber
temperature or set temperature.
2. Battery check lamp (BATTERY):
This lamp lights to recommend the battery replacement. For the
replacement, consult our sales representative or agent.
3. Alarm lamp (ALARM): This lamp is flashed during alarm condition.
4. Numerical value shift key ( ):
Pressing this key in the setting mode causes the numerical value to
shift. ON-OFF of key lock can be selected by pressing this key in the key lock mode. Pressing this key
for more than 5 seconds in the temperature display mode causes the alarm temperature setting mode or
alarm resume time setting mode. See page 15 “Alarm temperature setting” or page 17 “Setting of alarm
resume time”.
5. Digit shift key (
): Pressing this key in the setting mode causes the changeable digit to shift.
Key lock mode is led by pressing this key for more than 5 seconds in the temperature display mode.
6. Set key (SET):
Temperature setting mode is led by pressing this key and the changeable digit is
flashed. By pressing this key again, the setting is memorized. The set mode returns to the temperature
display mode automatically when 90 seconds has passed without any key operation. Refer to page 14
“Chamber temperature setting” for the details.
7. Alarm test key (ALARM TEST):
To check the alarm system during freezer operation. Pressing this
key with the battery switch ON gets the alarm lamp to flash, the remote alarm to operate, and the buzzer
to sound.
8. Alarm buzzer stop key (BUZZER):
To silence the audible alarm, press this key. The alarm during
the alarm test cannot be silenced by pressing this key. See page 17 “Setting of alarm resume time” for
the details.
3
21
8 7 6 54

11
INSTALLATION SITE
To operate this unit properly and to obtain maximum performance, install the unit in a location with the
following conditions:
A location not subjected to direct sunlight
Do not install the unit under direct sunlight. Installation in a location subjected to direct sunlight cannot
obtain the intended performance.
A location with adequate ventilation
Leave at least 10 cm around the unit for ventilation. Poor ventilation will result in a reduction of the
performance and consequently the failure.
A location away from heat generating sources
Avoid installing the unit near heat-emitting appliances such as a heater or a boiler etc. Heat can
decrease the intended performance of the unit.
A location with little temperature change
Install the unit under stable ambient temperature. The allowable ambient temperature is between 5 and
30
o
C.
A location with a sturdy and level floor
Always install the unit on a sturdy and level floor. The uneven floor or tilted installation may cause failure
or injury. Install the unit in stable condition to avoid the vibration or noise. Unstable condition may
cause vibration or noise.
WARNING
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.
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.
A location not prone to high humidity
Install the unit in the ambient of 80% R.H. or less humidity. Installation under high humidity may cause
current leakage or electric shock.
WARNING
Do not use the unit outdoors.
Current leakage or electric shock may result if the unit is exposed to rain
water.
Never install the unit in a humid place or a place where it is likely to be splashed by water.
Deterioration of the insulation may result which could cause current leakage or electric shock.
A location without flammable or corrosive gas
Never install the unit in a flammable or volatile location. This may cause explosion or fire or may result in
the current leakage or electric shock by the corrosion of the electrical components.
A location without the possibility of anything fall
Avoid installing the unit in the location where anything can fall down onto the unit. This may cause the
breakdown or failure of the unit.

12
INSTALLATION
1. Removing the packaging materials and tapes
Remove all transportation packaging materials and tapes. Open the doors and ventilate the unit. If the
outside panels are dirty, clean them with a diluted neutral dishwashing detergent. (Undiluted detergent
can damage the plastic components. For the dilution, refer to the instruction of the detergent.) After the
cleaning with the diluted detergent, always wipe it off with a wet cloth. Then wipe off the panels with a dry
cloth.
Note:
Remove the cable tie banding the power supply cord.
Prolonged banding may cause the corrosion of the cord
coating.
2.
Adjusting the leveling foot
Extend the leveling feet by rotating them counterclockwise
to contact them to the floor. Ensure the unit is level and
the casters are not in contact with the floor.
3.
Fixing the unit
A fixture is attached to the rear of the frame. Fix the
frame to the wall with this fixture and rope or chain.
4.
Ground (earth)
The ground (earth) is for preventing the electric shock in the case of the electrical insulation is somehow
degraded. Always ground the unit at the time of installation.
WARNING
Use a power supply outlet with ground (earth) to prevent electric shock. If the power supply outlet is
not grounded, it is necessary to install a ground by qualified engineers.
Never ground the unit through a gas pipe, water main, telephone line or lightning rod. Such
grounding may cause electric shock in the case of an incomplete circuit.
Leveling foot

13
START-UP OF UNIT
Follow the procedures for the initial and consequent operations of the unit.
1. Check that the power switch and battery switch are OFF.
2.
Connect the power cord to the dedicated outlet having appropriate rating with the chamber empty.
3.
Turn on the power switch.
Note:
The alarm buzzer operates until the chamber temperature reaches the set temperature if the power switch
is turned on with the battery switch is ON.
4.
Turn off the power switch of the Backup cooling kit (optional component) if it is installed.
5.
Turn on the battery switch.
6.
Set the chamber temperature to the desired temperature.
7.
Allow the chamber temperature to fall to the desired temperature. Check the chamber temperature on
the digital temperature indicator.
8.
Turn on the power switch of the Backup cooling kit (optional component) if it is installed.
9.
Press the alarm test key (ALARM TEST) and check that the alarm lamp blinks and alarm buzzer
activates.
10. After confirming the above, you can put articles into the freezer chamber in a small batch to prevent
the temperature rise.
Operation after power failure
The settings (chamber temperature, alarm temperature) are memorized by nonvolatile memory during the
power failure. Accordingly, the freezer resumes the operation with setting before power failure.
In some cases, the condensing fan may not operate to improve the cooling performance. This does not
mean the malfunction.
At the start-up: the fan starts to run with more than 30 minutes delay when the ambient temperature is
lower than 20
o
C.
During the normal operation: the fan may not operate when the ambient temperature is lower than
20
o
C.

14
CHAMBER TEMPERATURE SETTING
Table 1 shows the basic procedure for setting the chamber temperature. Perform key operations in the
sequence indicated in the table. The example in the table is based on the assumption that the desired
temperature is -75
o
C.
Note: The chamber temperature is set to -80
o
C at the factory.
Table 1 Basic operation sequence (Example: Chamber temperature -75
o
C)
Description of operation Key operated Indication after operation
1 Connect the power cord to the
outlet. Turn the power switch ON. ---- The current chamber temperature is displayed.
2 Press set key. SET The second digit is flashed.
3 Set to -75 with the numerical value
shift key and digit shift key.
When pressed, the figure of settable
digit changes.
When pressed, the settable digit
is shifted.
4 Press set key. SET
Set temperature is memorized and the
current chamber temperature is
displayed.
Note:
The temperature set mode returns to the temperature display mode automatically when 90 seconds has
passed without any key operation.
Although the value of the chamber temperature setting can range from -55
o
C to -90
o
C, the guaranteed
temperature range with no load is between -60
o
C and -80
o
C when the ambient temperature is 30
o
C.
KEY LOCK FUNCTION
This unit is provided with the key lock function. When the key lock is ON, change of temperature setting
through the key pad is not available. The key lock is set to OFF at the factory.
Display Mode Function
L 0 Key lock is OFF Enable to change of temperature setting
L 1 Key lock is ON Disable to change of temperature setting
Table 2. Procedure for key lock setting (change from key lock OFF to key lock ON)
Description of operation Key operated Indication after operation
1 ---- The current chamber temperature is
displayed.
2 Press digit shift key for 5 seconds.
The first digit is flashed.
3 Press numerical value shift key
and scroll the figure to 1. When pressed, the figure of settable digit changes.
4 Press set key. SET
The key lock is set to ON.
The current chamber temperature is
displayed.

15
FUNCTION MODE
This unit has the following function mode.
Indication Mode Settable range
F01 Setting of high temperature alarm Between 5 and 20
o
C higher than the
chamber set temperature (1
o
C gradient)
F02 Setting of low temperature alarm Between -5 and -20
o
C lower than the
chamber set temperature (1
o
C gradient)
F05 Setting of compressor delay time Between 3 and 15 minutes
(1 minute gradient)
F25 Setting of alarm resume time 0 or between 10 and 60 minutes
(10-minute gradient)
ALARM TEMPERATURE SETTING
This unit is provided with the high and low temperature alarm and the temperature at which the alarm is
activated is changeable.
The following procedure shows the setting of alarm temperature according to the condition below:
High temperature alarm: activates at the temperature 5
o
C higher than the chamber set temperature
Low temperature alarm: activates at the temperature 5
o
C lower than the chamber set temperature
Note:
The alarm temperature is set at the factory 10
o
C higher and lower than the chamber set temperature.
The available range of high/low temperature alarm is between 5
o
C and 20
o
C higher/lower than the
chamber set temperature.
Table 3 Procedure for setting high temperature alarm
Description of operation Key operated Indication after operation
1 ---- The current chamber temperature is
displayed.
2 Press numerical value shift key for
5 seconds.
The first digit is flashed.
3 Press numerical value shift key and
scroll the figure to 1.
When pressed, the figure of settable
digit increases.
4 Press set key. SET The first digit is flashed.
5
Set the temperature to 005 with the
digit shift key and numerical value
shift key.
Pressing the key shifts the digit which can be set.
When pressed, the figure of settable
digit increases.
6 Press set key. SET
Alarm temperature is memorized and
the current chamber temperature is
displayed.

16
ALARM TEMPERATURE SETTING
Table 4 Procedure for setting low temperature alarm
Description of operation Key operated Indication after operation
1 ---- The current chamber temperature is
displayed.
2 Press numerical value shift key for
5 seconds.
The right digit is flashed.
3 Press numerical value shift key and
scroll the figure to 2.
When pressed, the figure of settable
digit increases.
4 Press set key. SET The right digit is flashed.
5
Set the temperature to -05 with the
digit key and numerical value shift
key.
Pressing the key shifts the digit which can be set.
When pressed, the figure of settable
digit increases.
6 Press set key. SET
Alarm temperature is memorized and
the current chamber temperature is
displayed.

17
SETTING OF ALARM RESUME TIME
The alarm buzzer is silenced by pressing alarm buzzer stop key (BUZZER) key on the control panel during
alarm condition (The remote alarm cannot stopped. ). The buzzer will be activated again after certain
suspension if the alarm condition is continued. The suspension time can be set by following the
procedure shown in the Table 5 below.
The example in the table is based on the assumption that the desired duration is 20 minutes.
Note: The duration is set in 30 minutes at the factory.
Table 5 Setting procedure for alarm resuming time (change from 30 minutes to 20 minutes)
Description of operation Key operated Indication after operation
1 ---- The current chamber temperature is
displayed.
2 Press numerical value shift key for
5 seconds. The first digit is flashed.
3
Set the figure to F25 with the
digit shift key and numerical value
shift key.
Pressing the key shifts the digit which can be set.
When pressed, the figure of settable
digit increases.
4 Press set key. SET The current setting is displayed.
The second digit is flashed.
5 Set the figure to 020 with the
numerical value shift key.
When pressed, the figure of settable
digit increases.
6 Press set key. SET
Alarm resume time is memorized and
the current chamber temperature is
displayed.
The settable alarm resume time is 10, 20, 30, 40, 50, or 60 minutes (The setting is 010, 020, 030, 040,
050, or 060). The buzzer would not resume if the resume time is set in 000.
It is recommended to set the alarm resume time when the freezer is not under alarm condition. The
new setting is effective on the next alarm condition.
The setting cannot be changed during power failure.
The remote alarm during power failure or buzzer and remote alarm during alarm test cannot be
silenced.
The setting mode returns to the temperature display mode automatically when 90 seconds has passed
without any key operation. In this case, any setting before pressing the set key (SET) is not memorized.

18
CHANGE OF COMPRESSOR DELAY TIME
The delay time of the compressor can be changed to reduce the load on the power line and to facilitate
the start-up (reset) of the freezer after power failure.
The example in the table is based on the assumption that the delay time is changed to 4 minutes.
The delay time is set in 3 minutes at the factory.
Note:
The setting range for delay time is between 3 and 15 minutes. The cool down of chamber temperature
may be slow when the setting of delay time is over 5 minutes, depending on the installation environment.
There is no need of changing the delay time when the capacity of power source is adequate.
Table 6. Changing procedure for delay time (change from 3 minutes to 4 minutes)
Description of operation Key operated Indication after operation
1 ---- The current chamber temperature is
displayed.
2 Press numerical value shift key for
5 seconds. The first digit is flashed.
3 Set the figure to F05 with the
numerical value shift key.
When pressed, the figure of settable
digit changes.
4 Press set key. SET The current delay time is displayed.
The first digit is flashed.
5 Set the figure to 004 with the
numerical value shift key. When pressed, the figure of the first digit changes.
6 Press set key. SET
The delay time is memorized and
the current chamber temperature is
displayed.
The compressor starts to run with the delay time when the power cord is connected to the outlet or after
power failure.

19
REMOTE ALARM TERMINAL
WARNING
Always disconnect the power supply cord before connecting an alarm device to the remote alarm
terminal.
The terminal of the remote alarm is installed at the back of the unit. The alarm is generated from this
terminal. The contact capacity is DC 30 V, 2 A.
Contact output:
Between COM and N.O. Between COM and N.C.
At normal condition “Open” “Close”
At abnormal condition “Close” “Open”
Note:
The alarm device is activated when the power cord is disconnected because such condition is determined
as power failure.
REMOTE
ALARM
COM
MAX DC30 V 2 A
N.C.
N.O.