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Certificate of Quality
checker:
Manufacturer: Qingdao Haier Biomedical Co., Ltd.
Address: Haier Industrial Park, Economic Technology Development
Zone, Qingdao P.R. China
Web:www.haiermedical.com
Revision Date:09/2018
Version:2nd,2018
Dedicated code:0270501299Y
V13026
Laboratory Deep Freezer with
explosion-proof interior
Operation manual
• Our company reserves the right to interpret the Operaiton Manual.
• Read the Operation Manual carefully before using your appliance.
• Keep the Operation Manual in a safe place.
• Appearance , color and layout of the door may vary.
• Translation of the original instruction.
• The product is fit for low temperature storing goods.
Model:
DW-25L92FL
DW-25L92SF
DW-30L278FL
DW-30L278SF
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Related Manuals for Haier DW-30L278SF
Summarization of Contents
Product Introduction and Manufacturer Information
Haier Laboratory Deep Freezer Models
Lists the available explosion-proof deep freezer models offered by Haier.
Manufacturer and Contact Details
Provides company name, address, website, and revision details for the product.
Product Features and Packing List
Packing List Items
Details the contents included with the freezer, such as drawers, keys, and accessories.
Key Product Features
Highlights temperature control, safety systems, refrigeration efficiency, and user-friendly design.
Technical Specifications
General Freezer Specifications
Covers dimensions, volume, compressor type, and cooling method of the freezer.
Explosion-Proof Technical Data
Details ATEX classification, EX marking, and temperature classes relevant to explosion-proof features.
Safety Precautions and Circuit Diagram
General Safety Warnings and Cautions
Lists prohibited actions and important warnings for safe operation and to prevent personal injury.
Electrical Safety and Grounding
Emphasizes correct power connection and earthing for shock prevention.
Environmental Safety Considerations
Advises against use in wet or damp locations to prevent electrical hazards.
Electrical Circuit Diagram (DW-30L278FL/278SF)
Provides a visual representation of the freezer's electrical components for specific models.
Detailed Safety Instructions
Handling and Usage Safety
Precautions for handling plugs, avoiding liquids, and preventing physical damage during use.
Maintenance and Repair Safety
Guidelines for safe maintenance, user repair limitations, and health precautions.
Usage Restrictions and Disposal
Warnings about toxic materials, children's safety, and proper appliance disposal.
Electrical Circuit Diagram (DW-25L92FL/92SF)
Visual representation of electrical connections for specific models.
Refrigeration System and Operation
Refrigeration Schematic Diagram
Illustrates the layout of the refrigeration system components like evaporator and condenser.
System Operation and Handling Precautions
Advises on cord replacement, ventilation, defrosting, and handling practices for optimal performance.
Usage Guidelines and Operational Notes
Product Structure and Initial Operation
Describes the refrigeration system, microcomputer control, and initial operational requirements.
Loading Articles and Temperature Management
Guidance on batch loading items and managing internal temperatures for effective cooling.
Cleaning, Defrosting, and Normal Sounds
Instructions for cleaning, frost removal, and understanding common operational sounds.
FAQ and Compliance Information
Troubleshooting Common Issues
Addresses common problems like the freezer not working, poor cooling, and high noise with solutions.
Explosion-Proof Standards Compliance
Details compliance with EN and EU directives for equipment used in potentially explosive atmospheres.
Model and Serial Number Interpretation
Explains how to understand the product model designation and serial number format.
Installation and Maintenance
Installation Environment Requirements
Specifies ambient conditions like temperature, humidity, and altitude for proper installation.
Installation Site Selection Criteria
Guidelines for choosing a suitable location, ensuring ventilation and stable ground.
Inner Cleaning and Anti-Static Precautions
Instructions for cleaning the interior and preventing static discharge during maintenance.
Defrosting and Freezer Shutdown
Procedures for removing frost build-up and safely stopping the freezer operation.
Alarm System and Preparation
Alarm Indicators and Symptoms (DW-30L278FL/278SF)
Details alarms for high temp, low temp, power failure, and sensor faults for specific models.
Alarm Handling and Data Query
How to cancel alarms and query temperature data using control panel keys.
Pre-Use Preparation Steps
Covers unpacking, checking accessories, storage, leveling, and bracket installation.
Bracket Installation for DW-30L278FL/SF
Specific instruction for installing rear wall distance brackets for certain models.
Alarm System Details (DW-25L92FL/92SF)
Fault Codes and Alarm Indications
Lists fault codes, status, indications, and buzzers for various alarms on specific models.
Alarm Operation and Temperature Query
Instructions on using the alarm key and querying maximum/minimum temperature history.
Post-Installation Standing Period
Requirement to let the freezer stand for 24 hours before powering on after installation.
Control Panel and Application Method
Temperature and Parameter Adjustment
Steps for setting the internal temperature and adjusting other configurable parameters.
Control Panel Component Identification
Identifies key components of the control panel, including buttons and indicators.
Operational Procedures and Controls
Over-Current Protector Functionality
Explains the role and operation of the over-current protector in safeguarding the equipment.
Power Failure Recovery and Memory
Describes how the freezer retains settings after power interruptions due to memory function.
Controller Locking and Unlocking
Procedures for locking the control panel to prevent accidental changes or unauthorized adjustments.
Application Method and Component Overview
Initial Freezer Operation and Stabilization
Guidelines for the first 90 minutes of operation before making any adjustments to ensure stability.
Detailed Temperature Setting Procedure
Step-by-step guide for adjusting the internal temperature using the control panel.
Parameter Settings Table
Lists various adjustable parameters like alarm limits, delays, and temperature units.
Control Panel Interface Details
Visual breakdown of the control panel for different Haier freezer models.
Control Panel Interfaces
DW-30L278FL/278SF Control Panel Layout
Visual depiction of the control panel for the DW-30L278FL/278SF model range.
DW-25L92FL/92SF Control Panel Layout
Visual depiction of the control panel for the DW-25L92FL/92SF model range.
Initial Power-On and Operation
Power Connection and Initial Setup
Connecting the power cord and ensuring correct voltage (220-240V~/50Hz) for initial operation.
Initial Alarm and Temperature Stabilization
What to expect during initial run, including alarm sounds and temperature stabilization.
Loading Articles After Stabilization
Guidance on when to begin placing items into the freezer after temperature stabilization.
Operational Checks and Loading Strategy
Daily Operation Monitoring
Procedures for daily checks, recording operating conditions, and transferring articles if needed.
Temperature Indication and Batch Loading
Explains temperature differences and the importance of batch loading for optimal performance.
Refrigerating Circuit and Internal Appliances
Warnings about preserving the refrigerating circuit and using only approved internal appliances.
Alarm System and Data Query
Alarm Faults and Causes (DW-25L92FL/92SF)
Detailed table of alarm types, symptoms, fault codes, and indications for specific models.
Alarm Handling and Temperature Data Retrieval
How to silence alarms and query maximum/minimum temperature data using control panel functions.
Preparation and Alarm Information
Alarm Indicators and Symptoms (DW-30L278FL/278SF)
Comprehensive table of alarm conditions, their indicators, and symptoms for specific models.
Preparation Before Initial Use
Steps for unpacking, checking accessories, storage, leveling, and installing brackets.
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