ROUTINE MAINTENANCE

WARNING

Always 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.

CAUTION

Always put on the dry gloves to protect the hands at the time of maintenance. No gloves may cause

cut of the finger by the edge or corner.

Cleaning of cabinet

1.Clean the unit once a month. Regular cleaning keeps the unit looking new.

2.Use a dry cloth to wipe off small amounts of dirt on the outside and inside of the unit and all accessories. If the unit is very dirty, use a neutral detergent.

3.After cleaning, wipe away the cleaner completely with a cloth washed in clean water.

4.Never pour water onto or into the unit. Doing so can damage the electric insulation and cause failure.

・The compressor and other mechanical parts are completely sealed. This unit requires absolutely no lubrication.

・Remove dust from the power supply plug periodically.

Defrosting

Defrost the freezer whenever one of the defrost marks shown by 8 in the figure on page 8 is hidden by frost.

Use the scraper provided for removing the frost if the freezer operation must be continued. Pay attention not to impact or damage the inner wall.

(In the case of MDF-U537D, the top and bottom compartments can be defrosted independently. Perform the following procedure after first using the compartment select key to select the compartment to be defrosted.)

1.When defrosting, temporarily move all the contents of containers in the freezer to another low-temperature freezer.

2.Place the empty defrost/storage container inside the freezer.

3.Press DEF key for 5 seconds to stop the refrigerating operation. While the refrigerating operation is stopped, the current chamber temperature and dF is displayed on the control panel alternately.

4.After a several hours, check visually that all defrost was removed completely.

5.Throw out the water that has accumulated in the defrost/storage containers, then wipe the inside of the freezer dry.

6.Press DEF key so that the refrigerating operation can be started.

7.Once the chamber temperature has dropped to the desired temperature, place the original contents back in the freezer chamber.

Note:

After the defrosting, the refrigerating operation is never resumed automatically. Make sure to press DEF key to start the freezer operation after defrosting.

24

Page 24 Page 26
Page 25
Image 25
Sanyo MDF-U333, MDF-U537 instruction manual Routine Maintenance, Cleaning of cabinet, Defrosting
Page 24 Page 26

MDF-U333, MDF-U537 specifications

Sanyo's MDF-U537 and MDF-U333 are high-performance laboratory freezers designed for the secure storage of sensitive biological samples, medical supplies, and other critical materials. These models are renowned for their reliability, energy efficiency, and advanced technologies.

The Sanyo MDF-U537 offers a temperature range of -20°C to -86°C, making it versatile for various applications, including long-term storage of vaccines, enzymes, and other temperature-sensitive materials. With a capacity of 528 liters, it is spacious enough to accommodate numerous samples while maintaining organized storage. This model features a dual-layer door system that ensures minimal temperature fluctuations when accessing stored items.

One of the standout features of the MDF-U537 is its advanced microprocessor control system, which provides precise temperature management. This system is complemented by a digital display that allows for easy monitoring of internal conditions. Additionally, the freezer is equipped with an alarm system that notifies users of any temperature deviations or door openings, ensuring the integrity of the stored samples.

On the other hand, the Sanyo MDF-U333 is a more compact model, boasting a capacity of 330 liters, which makes it suitable for smaller labs with limited space. The MDF-U333 also maintains a temperature range of -20°C to -86°C, ensuring optimal storage conditions for a variety of biomedical applications.

Both models incorporate eco-friendly refrigerants, aligning with modern sustainability standards while maintaining energy efficiency. The insulation used in both the MDF-U537 and MDF-U333 is designed for superior thermal performance, minimizing energy consumption and operational costs.

Moreover, these freezers come equipped with a comprehensive monitoring system that includes temperature logging features, allowing users to maintain compliance with industry regulations. The robust build quality ensures durability, making them reliable choices for long-term, continuous use in demanding laboratory environments.

In summary, the Sanyo MDF-U537 and MDF-U333 are exceptional laboratory freezers characterized by their energy-efficient design, extensive storage capacities, and advanced temperature management technologies. These models represent the forefront of reliable sample preservation in the biotechnology and medical research fields, offering peace of mind for researchers and laboratory personnel.
Top Page Image Contents