Instruction Manual
27 Pages
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Page 1
INSTRUCTION MANUAL
MDF-136 MDF-236 MDF-436
BIOMEDICAL FREEZER
MDF-236
Note: 1. No part of this manual may be reproduced in any form without the expressed written permission of SANYO. 2. The contents of this manual are subject to change without notice. 3. Please contact SANYO if any point in this manual is unclear or if there are any inaccuracies. SANYO Electric Biomedical Co., Ltd.
All rights reserved.
Printed in Japan.
CONTENTS PRECAUTIONS FOR SAFE OPERATION
P. 2
CAUTIONS FOR USAGE
P. 6
ENVIRONMENTAL CONDITIONS
P. 7
FREEZER COMPONENTS
P. 8
INSTALLATION
P. 11
OPTIONAL COMPONENTS
P. 13
START-UP OF UNIT
P. 15
REMOTE ALARM TERMINAL
P. 15
TEMPERATURE SETTING
P. 16
ALARMS & SAFETY FUNCTIONS
P. 18
SETTING OF ALARM RESUME TIME
P. 19
ROUTINE MAINTENANCE
P. 20
TROUBLESHOOTING
P. 21
DISPOSAL OF UNIT
P. 21
SPECIFICATIONS
P. 22
PERFORMANCE
P. 23
SAFETY CHECK SHEET
P. 24
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PRECAUTIONS FOR SAFE OPERATION It is imperative that the user complies with this manual 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 manual 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.
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PRECAUTIONS FOR SAFE OPERATION
WARNING 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. unqualified personnel may cause electric shock or fire.
The installation by
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. 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. Use a dedicated power source as indicated on the rating label attached to the unit. Remove dust from the power supply plug before inserting in a power source. A dusty plug or improper insertion may pose a hazard. Use a power supply outlet with ground (earth) to prevent electric shock. If the power supply outlet is not grounded, it will be necessary to install a ground by qualified engineers. 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. Do not insert metal objects such as a pin or a wire into any vent, gap or any outlet for inner air circulation. This may cause electric shock or injury by accidental contact with moving parts. Never store volatile or flammable substances in this unit. This may cause explosion or fire. Never store corrosive substances in this unit. This may lead to damage to the inner components or electric 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. Disconnect the power supply to the unit prior to any repair or maintenance of the unit in order to prevent electric shock or injury. 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.
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PRECAUTIONS FOR SAFE OPERATION
WARNING Never splash water directly onto the unit as this may cause electric shock or short circuit. Never disassemble, repair, or modify the unit yourself. Any such work carried out by an unauthorized person may result in fire or injury due to a malfunction. Disconnect the power supply plug if there is something wrong with the unit. abnormal operation may cause electric shock or fire.
Continued
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. Prepare a safety check sheet when you request any repair or maintenance for the safety of service personnel.
CAUTION 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. 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. 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. Never damage or break the power supply plug or cord. Do not use the supply plug if its cord is loose. This may cause fire or electric shock. Do not touch any electrical parts such as the power supply plug or any switches with a wet hand. This may cause electric shock. Do not put a container with water or heavy articles on the unit. It may cause injury if the articles fall. Current leakage or electric shock may be resulted form the deterioration of insulation by spilled water.
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PRECAUTIONS FOR SAFE OPERATION
CAUTION Do not climb onto the unit or do not put articles on the unit. This may cause injury by tipping or damage to the unit. Put on dry gloves when you take out refrigerated articles from the freezer. Handing frozen contents or the inside walls with naked hands may cause frostbite. Do not defrost inside walls using a knife or ice pick. There are pipelines for cooling behind the walls. Be careful not to damage the lines as this could cause a breakdown. Also, do not make a hole in the wall for installation of attachments. Hold the handle when closing the door. This will reduce the likelihood of a trapped finger. 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. Be careful not to tip over the unit during movement to prevent damage or injury. Disconnect the power plug when the unit is not used for long periods. Do not put the packing plastic bag within reach of children as suffocation may result Remove dust and clean the power supply plug periodically. The operation with a dusty plug may cause fire.
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CAUTIONS FOR USAGE 1. Sometimes the alarm may not operate at the time of first start-up. This does not mean malfunction. It is due to the complete discharge of incorporated battery. 2-day continuous operation of the freezer is necessary to charge the battery fully. 2. The digital thermometer of medical freezer is designed to display the temperature of the center part of the freezing compartment. Although the thermometer sometimes displays a temperature a little bit higher than the actual temperature of the center part, it gradually approaches the real temperature. 3. An access port to take out the measuring cable in the case is provided on the back wall of the freezer. Be sure to replace the cap and heat insulator after take out cable or, the inside temperature cannot complete down, and frost may accumulate outside the port surroundings. 4. Do not use brushes, acids, benzine, thinners, powdered soap. Polishing powders, or hot water for cleaning, as they can deteriorate the painted surfaces and parts made of plastic and rubber. Be especially careful not to wipe plastic or rubber parts with volatile solvents such as benzine. Wipe up the neutral detergents with a wet cloth when used. 5. Frost will accumulate on the inside walls of the freezer during use. Then remove the frost with the spatula provided or a similar tool. Do not defrost inside walls using a knife or ice pick. There are pipelines for cooling behind the walls. Be careful not to damage the lines as this could cause a breakdown. Also, do not make a hole in the wall for installation of attachments. 6. The freezing temperature is different at each position inside the case of this freezer. The set temperature represents the temperature at the center of the inside case. The refrigerated articles put on the highest position part, are refrigerated higher than the set temperature, while those put on the lowest part are refrigerated lower. 7. Do not put too many worm articles into a freezer compartment before enough operating. Put items in a few at a time after the freezer compartment temperature has cooled to at least -20oC. 8. In the case of high ambient temperature, the cabinet front may heat up after the freezer starts to operate first. However, this does not denote a malfunction. It is due to heater or hot gas piped around the unit frame to prevent frost and ice sticking around the cabinet.
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ENVIRONMENTAL CONDITIONS This equipment is designed to be safe at least under the following conditions (based on the IEC 1010-1): 1. Indoor use; 2. Altitude up to 2000 m; 3. Ambient temperature 5oC to 40oC 4. Maximum relative humidity 80% for temperature up to 31oC decreasing linearly to 50% relative humidity at 40oC; 5. Mains supply voltage fluctuations not to exceed ±10% of the nominal voltage; 6. Other supply voltage fluctuations as stated by the manufacturer; 7. Transient overvoltages according to Installation Categories (Overvoltage Categories) II; For mains supply the minimum and normal category is II; 8. Pollution degree 2 in accordance with IEC 664.
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FREEZER COMPONENTS 1
2
5
3 6
4
7 8 9
10
MDF-236
11
12
13
14
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FREEZER COMPONENTS 1. Door:
To open the door, grip the handle.
2. Handle:
Always grip this handle to open and close the outer door.
3. Door gasket:
This provides a tight door seal and prevents cold air leak. Keep clean.
4. Access port: This is used for leading the measuring cable from the freezing chamber to the outside. 5. Lock: Turn counterclockwise to 180o with a key and the outer door is securely locked. 6. Control panel: Temperature set key, buzzer key and alarm lamp etc. are installed on the panel. Digital temperature display is also provided on it. See page 10 for the details. 7. Caster: 4 casters are provided to facilitate moving of the cabinet. At the time of installation, make sure that the front 2 casters are not contact with the floor, by adjusting the leveling legs. 8. Leveling foot: 2 feet are provided on the front side (right and left). adjusting these legs at the installation.
Keep the unit in level by
9. Space for temperature recorder: An automatic temperature recorder (optional part) can be attached here. See page 13 “Temperature recorder”. 10. Drain port: 11. Basket:
The water accumulated on the bottom of the chamber can be drained through this port.
Used for storing the materials in the chamber.
12. Remote alarm terminal (on back side): This is used to notice an alarm condition of the unit to remote location. Refer to page 15 “Remote alarm terminal”. 13. Battery switch: This is a switch for power failure. Always set the switch in ON position. Be sure to turn off this switch to save the battery if the freezer is not in operating for the long period (more than 1 month). 14. Power switch:
This is for turning ON/OFF the power to the unit. ON – “I” OFF – “○”. This has
a function as an over-current protection breaker (15A).
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FREEZER COMPONENTS Control panel and keypad 7
1
2
8
3
4
5
6
1. Alarm test key (ALARM TEST): Test key for alarm device. By pressing this key, the alarm lamp is flashed, remote alarm is activated and buzzer sound. This means all alarm function operate correctly. 2. Buzzer stop key (BUZZER): To silence the audible alarm, press this key. The remote alarm is also silenced by pressing this key. (The buzzer cannot be stopped during remote alarm testing.) 3. Defrost key (DEF): By pressing this key for 5 seconds, the refrigerating operation is stopped. Pressing this key again after defrosting leads resumption of the operation. Note: The refrigerating operation never resume automatically after defrosting. 4. Set key (SET): Temperature setting mode is led by pressing this key. Once the key is pressed, the changeable digit is flashed. Pressing this key again after setting desired temperature, the setting is stored into computer memory. If there is no key operation for 90 seconds during the temperature setting mode, the temperature setting mode is invalid automatically. See page 16 for the details. 5. Digit shift key ( ): Pressing this key in the setting mode causes the changeable digit to shift. Key lock is available by pressing this key for more than 5 seconds in the temperature display mode. Refer to page 16 for the key lock. 6. 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. 7. Alarm lamp (ALARM): This lamp is flashed when the audible alarm is activated. 8. Digital temperature indicator: temperature.
This indicator shows the present chamber temperature or set
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INSTALLATION Installation site To operate this unit properly and to obtain maximum performance, install the unit in a location with the following conditions: 1. A location not subjected to direct sunlight Installation in a location subjected to direct sunlight may lead to inadequate cooling. 2. A location with adequate ventilation Leave at least 10 cm around the unit for ventilation. Poor ventilation will result in a reduction of the refrigeration capacity. 3. A location away from heat generating sources Avoid installing the unit near heat-emitting appliances such as gas ranges or stoves. Heat can cause inefficient refrigeration. 4.
A location with a sturdy and level floor
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. 5.
A location without flammable or corrosive gas
WARNING 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. 6.
A location not prone to high humidity
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.
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INSTALLATION Installation 1. Remove 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 neutral detergent and wipe it up with a wet cloth. 2. Adjust the leveling feet Extend the leveling feet by rotating them counterclockwise to contact them to the floor. Ensure the unit is level. 3. Fix the unit Two fixtures are attached to the rear of the frame. Fix the frame to the wall with these fixtures and rope or chain. Leveling foot 4.
Ground (earth)
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.
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OPTIONAL COMPONENTS Temperature recorder WARNING Always disconnect the power supply to the unit prior to attachment of a temperature recorder in order to prevent electric shock or injury. An automatic temperature recorders is available for this freezer as the optional component. The type of the recorder is MTR-G85. For the attachment, the mounting kit (MDF-S740) is necessary. Following shows the attachment procedure. 1. Remove four screws on the cover for the recorder mounting space and take off the cover. (Fig. 1)
Fig. 1 2. Fix temperature recorder to the mounting by using 2 screws and fixture enclosed with the mounting kit. (Fig. 2) 3. Connect the power cord of the recorder with the coupler in the unit compartment of the freezer.
Fixture
Fig.2 4. Remove the caps and insulation covering the access port on the chamber side and unit compartment side. (Fig. 3) Then pass the recorder sensor through this port to go into the freezer chamber. 5. Insert the recorder sensor into the tube enclosed with the mounting kit.
Door
Chamber Cap
Insulation
Front view
13
Fig. 3
OPTIONAL COMPONENTS 6. As shown in the Fig. 4, fix the recorder sensor on the chamber wall by using 2 clips with a 10mm spacer located between the wall and the clip. The clips and spacers are enclosed with the mounting kit.
Spacer
7. Cover the gap of the access port on the chamber side completely by a silicon sealant after pushing the insulation into the gap.
Clip
Sensor Fig. 4
8. After binding the lead wire on the back of the recorder and fix the recorder to the freezer with 4 screws removed in procedure 1. (Fig. 5)
Fig. 5
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START-UP OF UNIT Follow the procedures for the initial and consequent operations of the unit. 1. Turn the power switch ON with the chamber empty. 2. Turn ON the battery switch. 3. The alarm sometimes may operate. In this case, silence the alarm by pressing BUZZER key. 4. Set the chamber temperature to a desired value. 5. Allow the unit to achieve the desired chamber temperature. 6. Check that the alarm lamp is flashed and the buzzer is activated by pressing ALARM TEST key. The remote alarm is also operated. E09 is displayed on the control panel if the battery switch is OFF. Make sure to turn on the battery switch. 7. Now you can put articles into the freezer chamber gradually to minimize the temperature rise.
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 outputted from this terminal. Contact capacity is DC 30V, 2 A. Contact output: At normal condition “Open” At abnormal condition “Close” Note: The remote alarm is silenced by pressing the BUZZER key as the remote alarm is operated in conjunction with the buzzer except for the power failure alarm and alarm test. The contact is closed in the case of power failure.
15
Terminal
TEMPERATURE SETTING Chamber temperature 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 -35oC. Note: The unit is set at the factory that the chamber temperature -30oC. Table 1.
Chamber temperature -35oC)
Basic operation sequence (Example: Description of operation
Key operated
Indication after operation The current chamber temperature is displayed.
1
Switch ON the freezer.
----
2
Press SET key.
SET
3
Press
key.
4
Press to 5.
key and scroll the figure
5
Press SET key.
The second digit is flashed. When pressed, the settable digit moves. When pressed, the figure of settable digit increases.
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 between -18oC and -40oC, the guaranteed temperature without load is -35oC at ambient temperature of 35oC.
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 in OFF at the factory. Display
Table 2.
Mode
Function
Key lock is OFF
Enable to change of temperature setting
Key lock is ON
Disable to change of temperature setting
Procedure for key lock setting (change from key lock OFF to key lock ON) Description of operation
Key operated ----
1 2
Press
key for 5 seconds.
4
Press to 1.
key and scroll the figure
5
Press SET key.
Indication after operation The current chamber temperature is displayed. The right digit is flashed. When pressed, the figure of settable digit increases.
SET
16
The key lock is set to ON. The current chamber temperature is displayed.
TEMPERATURE SETTING Alarm temperature setting This unit is provided with both high and low temperature alarms. The temperature at which the alarm is activated may be changed. The available set range for high temperature alarm is between +5oC and +15oC, and -5oC and -15oC for low temperature alarm against the chamber temperature. Note: The temperature alarm is set at 10oC of the set temperature at the factory. Display
Mode
Function
High temperature alarm set
See Table 5 on page 18
Low temperature alarm set
See Table 5 on page 18
As an example, Table 3 shows the procedure to set the high temperature alarm so that the alarm can activate when the chamber temperature is 5oC higher than the set temperature. Table 4 shows the procedure to set the low temperature alarm so that the alarm can activate when the chamber temperature is 5oC lower than the set temperature. Table 3.
Procedure for setting high temperature alarm Description of operation
Key operated ----
1 2
Press
key for 5 seconds.
3
Press to 1.
key and scroll the figure
4
Press SET key.
5
Set the temperature to 005 with the key and key.
6
Press SET key.
Table 4.
Indication after operation The current chamber temperature is displayed. The first digit is flashed. When pressed, the figure of settable digit increases.
SET
The right digit is flashed. Pressing the key shifts the digit which can be set. When pressed, the figure of settable digit increases.
SET
Alarm temperature is memorized and the current chamber temperature is displayed.
Procedure for setting low temperature alarm Description of operation
Key operated ----
1 2
Press
key for 5 seconds.
3
Press to 2.
key and scroll the figure
4
Press SET key.
5
Set the temperature to -05 with the key and key.
6
Press SET key.
Indication after operation The current chamber temperature is displayed. The right digit is flashed. When pressed, the figure of settable digit increases.
SET
The right digit is flashed. Pressing the key shifts the digit which can be set. When pressed, the figure of settable digit increases.
SET
17
Alarm temperature is memorized and the current chamber temperature is displayed.
ALARMS & SAFETY FUNCTIONS This unit has the alarms and safety functions shown in Table 5, and also self diagnostic functions. Table 5
Alarms and safety functions
Alarm & Safety High temperature alarm Low temperature alarm
Power failure alarm
Auto-return Key lock
Situation If the chamber temperature is higher than the temperature at which the high temperature alarm is activated. If the chamber temperature is lower than the temperature at which the low temperature alarm is activated. In the case of power failure. When power switch is turned OFF. When the power to the unit is disconnected. When there is no key pressing in each setting mode for 90 seconds.
Thermal sensor abnormality If the thermal sensor is short-circuited.
Battery switch check
Compressor temp. abnormality (MDF-436 only)
ALARM lamp is flashed. Chamber temperature is displayed.
When the key lock is “ON”. If the thermal sensor is disconnected.
Thermal sensor abnormality (MDF-436 only)
Indication ALARM lamp is flashed. Temperature indicator is flashed. ALARM lamp is flashed. Temperature indicator is flashed.
If the protective sensor for compressor is disconnected. If the protective sensor for compressor is short-circuited. When the battery switch is OFF at the time of alarm test. In the case of failure of compressor cooling fan motor. In the case of abnormal high temperature due to the dust on the condenser. In the case of abnormal high ambient temperature.
----ALARM lamp is flashed. E01 and chamber temp. are displayed alternately. ALARM lamp is flashed. E02 and chamber temp. are displayed alternately. ALARM lamp is flashed. E03 and chamber temp. are displayed alternately. ALARM lamp is flashed. E04 and chamber temp. are displayed alternately.
Buzzer
Safety operation
Intermittent tone with 15 minutes delay.
Remote alarm with 15 minutes delay.
Intermittent tone with 15 minutes delay.
Remote alarm with 15 minutes delay.
Intermittent tone
Remote alarm.
---------
Finishing of each Setting mode. Change of setting is disable.
Intermittent tone
Remote alarm. Continuous running.
Intermittent tone
Remote alarm. Continuous running.
Intermittent tone
Remote alarm. Normal operation.
Intermittent tone
Remote alarm. Normal operation.
E09 is flashed.
Intermittent tone
Remote alarm.
E10 is flashed.
Intermittent tone
Remote alarm. Compressor stops running.
Note: 1. The above power failure alarm is available when the battery switch is ON and the battery is charged. If the battery switch is OFF or the battery is discharged, only the remote alarm is activated. 2. The power failure alarm can be kept about 12 hours with the battery charged completely. 2-day operation of the freezer is needed to charge the battery full. 3. The chamber temperature is displayed for 5 seconds if the BUZZER key is depressed during the power failure alarm. After that, the alarm stops and the alarm lamp blinks. 4. The remote alarm is silenced by pressing BUZZER key as the remote alarm is operated in conjunction with the buzzer, except for the power failure alarm. 5. After power failure, the operation is resumed with the condition before power failure since the temperature setting and alarm temperature setting are memorized in a nonvolatile memory.
18