Low Temperature (SLT) Freezer (DW-150W200) Operation Manual Contents Before Use Product Features-----------------------------------2 Parts Name -----------------------------------3 Safety Precautions----------------------------------4 Installation Location-------------------------------6 In Use Preparations and Operation Procedures------7 Control Board Adjustment---------------------9 Maintenance & Servicing Defrosting · Non-use-----------------------------12 Cleaning--------------------------------------------13 Q & A-----------------------------------------------14 After-sales Service------------------------------- 15...
Product Features ● Relying on unique cascade refrigeration system and its stable/reliable running, the freezer achieves better refrigeration effect and may be used in a wider range of ambient temperature compared with counterparts, greatly reducing maintenance cost. ● The freezer is featured with computer control, digital temperature display and adjustable internal temperature in the range of -126 ℃...
Thank you for choosing and using Haier products! Haier is dedicated to providing high-grade, high-precision and advanced products, and thus it may say that Haier products are featured with good quality and high performance. For your better use, please read this manual carefully before use and follow the operation procedures as described in this manual.
Safety Precautions Please read all the installation and operation instructions carefully, and strictly follow them when installing and operating, otherwise the user shall be solely liable for any resultant damages (including part damage). Precautions for installation location Installation site of the equipment should ensure a well-ventilated circumstance, avoid direct sunlight.
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samples into the freezer in batches and pre-cool those hot samples fully before putting them into the freezer. In case of handling or moving, only after the freezer is left still for over 24 hours can it be energized to operate, otherwise result in serious damage to the freezer, even compressor burn-out. For any equipment may go wrong or fail to work, the user must ensure that reserve equipment or reserve devices are available in the vicinity so that samples can be moved into safe reserve equipment or system for preservation in an emergency.
Installation Location 1. The freezer must be installed in a well-ventilated place where the room temperature is below 27°C. 2. The freezer must not be placed in the site that under direct sunlight or close to heat sources. 3. The temperature of equipment working environment should not be less than 10 ° C. The freezer should not be used if ambient temperature below 10°C.
Preparations and Operation Procedures When handling, it is strictly forbidden to overturn (upside down) the freezer; never allow its angle of inclination over 45° to avoid oil spill onto the system pipeline. Note: If the freezer is excessively inclined or upside down, compressor oil would spill onto the system pipeline, resulting in inadequate compressor oil.
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Samples storage and instructions Only after the freezer operates stably after commissioning and making sure that internal temperature meets storage requirements can samples be put into the freezer in batches. The freezer must not be loaded with samples over 1/5 of its effective capacity at a time. If samples are too hot, they should be pre-cooled down to required temperature by other equipment before being put into the freezer.
Control board Adjustment Functions and operating instructions of the SLT freezer control board ● Temperature display A large display screen indicates actual internal temperature. A small display screen indicates current input voltage (no voltage indication for 3-phase power). Another small display screen indicates current ambient temperature. ●...
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H. “Low battery charge” indicator light “on” indicates the battery is at low charge and must be recharged; when connected to AC power supply, the SLT freezer charges the battery automatically. ● Key definition: There are 4 keys on the temperature control board. With the “Locked” indicator light on, all the keys are locked to prevent misoperations.
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“ ” or “ ▽ ”. After finishing the setting, if no key is pressed in 5s, the temperature value stops flashing, △ indicating that the value has been stored in the computer, otherwise the setting is invalid. The range of temperature setting is -126 ~ -150 ℃...
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2.8 If the freezer is required to reach its minimum temperature, e.g. –150 , ℃ please do as follows: make sure that ambient temperature is below 25 , ℃ and then set the temperature at –145 ℃ and observe for 5~7 days for stable working state and starting/stopping.
Defrosting · Non-use Defrosting 1. After the SLT freezer is used for some time, a layer of frost may be formed; if too thick, it would influence the refrigeration effect and increase power consumption. Therefore, the freezer must be defrosted at certain interval, that is, upon the thickness reaching approximately 10mm. 2.
Cleaning Cleaning and maintenance The freezer should be cleaned after unpacking but before initial startup for commissioning, during normal use or before non-use. For safety, be sure to turn off the power switch before cleaning. The freezer should be cleaned with a soft cloth or sponge moistened with water or soap water (non-corrosive neutral detergents permitted), and then wiped with a dry cloth to prevent rust.
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Q & A The following phenomena are not faults: In case of first use or startup, the freezer may work for a long time or give out loud noise, etc. That is not a fault but normal phenomenon. It is normal that the condenser fan starts and stops automatically according to ambient temperature. It is normal that there is fluid flow noise from the freezer arising from the cycle flow of refrigerant in its pipeline.
1. immediately move the samples stored in the freezer into a safe freezer in the vicinity. 2. turn off power switch. 3. contact and report the fault to local Haier After-Sales Service Center to have it clear soon. Common troubles and solutions...
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Solutions: If the problem lies in control board, replace it; if lies in compressor itself, replace it or its accessories. Unstable temperature Internal temperature does not reduce, but rises, e.g. rises to -80 ℃ from -140 ℃ . Cause 1: Dirty condenser or clogged air vent Solution: Clean the condenser Cause 2: Slowdown of fan speed Solution: Replace the fan...
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In case of any fault, be sure to immediately move the samples stored in the freezer into a proper device for safe preservation, and then turn off the freezer and contact Haier Headquarters or local After-sales Service Center to receive timely and fast service.
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“Installation and Commissioning Sheet” for those products purchased from dealers). As for the products out of warranty period, they will be charged as per Haier Uniform Service Charge Standard. For the replacement of parts, only cost and freight are charged and no charge on service is required to pay.
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Ambient Conditions The freezer is designed in consideration of following conditions and can be used in a safe way at least under the following conditions (on the basis of IEC 1010-1): 1. Indoor use; 2. Altitude not higher than 2000m; 3.