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Midea COMBI Series User Manual

Midea COMBI Series
51 pages
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Service Manual_2018-V2.0
1
Service Manual
COMBI SERIES
Applicable Models
Model Code
Applicable Models
HD-676REWN
UR-BCD520WE1-SQ
22031020005621
The picture in this service manual is only for reference, and specific appearance
and configuration are subject to the real product.
This manual mainly teaches the method, the specific work skill needs engineer to
accumulate through the daily work.

Table of Contents

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Midea COMBI Series Specifications

General IconGeneral
BrandMidea
ModelCOMBI Series
CategoryRefrigerator
LanguageEnglish

Summary

Significant update notes

Safety Warning Code

Warning for operation safety

Provides essential safety instructions for operating the appliance and highlights potential hazards.

Safety instruction for refrigerant

Details safety precautions related to the refrigerant, emphasizing handling and disposal risks.

Transport

Handling

Instructions on how to safely move and handle the refrigerator during transport, including post-move waiting periods.

Installation and commissioning

Door Disassembly and Assembly

Guidance on dismantling and reassembling the refrigerator doors, necessary if the unit doesn't fit through doorways.

Installation location

Criteria for selecting an optimal installation location to ensure proper ventilation and energy efficiency.

Leveling of the refrigerator

Instructions on how to ensure the refrigerator is stable by adjusting its footing for proper leveling.

Left or right open door reversal

Steps for changing the door swing direction from left to right or vice versa.

Installation of handle (None)

Information regarding the installation of the door handle, noted as not applicable for this model.

Installation of door lock (None)

Information regarding the installation of a door lock, noted as not applicable for this model.

Product configuration and dimension

Main parts and their names

Identifies and labels the primary components of the refrigerator and freezer sections.

External dimension

Provides detailed measurements and dimensions of the refrigerator's exterior and door opening requirements.

Location of S/N

Illustrates the locations where the Serial Number (S/N) can be found on the product and its packaging.

Product specification

Electrical parameters

Details electrical specifications including refrigerant type, compressor, power, and wiring resistance.

Cooling temperature setting range

Specifies the temperature ranges for the freezing and refrigerating compartments.

Defrosting parts

Lists electronic components related to the defrosting system, such as sensors and fuses.

Circuit diagram

Presents a schematic diagram of the refrigerator's electrical and control circuits.

Main control board structure diagram

Visual representation of the main control board's layout and component placement.

Refrigerating piping system and circulating route of cooling air

Refrigerating piping system

Diagram and description of the refrigeration circuit, detailing the flow of refrigerant through various components.

Special soldering position

Highlights specific locations or techniques required for soldering during repair or assembly.

Circulating route of cooling air

Illustrates the airflow path within the refrigerator and freezer compartments for efficient cooling.

Dismantling of parts

Parts on the door

Instructions for removing components located on the refrigerator doors, such as seals and trays.

Parts inside the refrigerator

Guidance on how to remove internal parts like fruit box covers and shelves.

Light system

Procedures for accessing and replacing lighting components within the refrigerator and freezer.

Air duct components refrigerating chamber and fan motor

Steps for dismantling air duct components and the fan motor in the refrigerating chamber.

Air duct components in freezing chamber and fan motor

Instructions for removing air duct components and fan motor from the freezing chamber.

Evaporator and Defrost system

Details on how to remove and service the evaporator and associated defrost system components.

Compressor case

Procedures for accessing and working with the compressor, including rear cover and pipe connections.

Display control board (None)

Indicates that there is no specific display control board section detailed for this model.

Main control board

Instructions on how to access and remove the main control board (PCB) for maintenance or replacement.

Temperature sensing system

Position of sensors

Identifies the locations of the four temperature sensors within the refrigerator and freezing chambers.

Replacement of sensors

Provides guidance on how to remove and replace sensors located in the refrigerating chamber.

Sensor replacement

General guidelines and steps for replacing temperature sensors, including cutting and connecting wires.

Sensor resistance (R/T)

A table detailing the resistance (R) values of sensors at various temperatures (T) for diagnostic purposes.

Function and operation

Operation panel

Overview of the refrigerator's control panel, including button functions and display indicators.

Display

Explanation of the display screen's behavior during power-on, normal operation, and fault conditions.

Temperature setting

Instructions on how to adjust the temperature settings for both the refrigerator and freezer compartments.

Open door alarm

Details on the door alarm function, including activation conditions and buzzer alerts.

Function Selection

Information on entering and exiting specific operational modes like 'Quick cool mode'.

Fault code and solutions

A table listing fault codes (LED flickering patterns) and corresponding maintenance or troubleshooting steps.

Defrosting function

Explanation of how the defrosting cycle operates in both freezing and refrigerating chambers.

Test mode

Procedures for entering and operating the refrigerator in forced cooling and forced defrosting test modes.

Backup data for power fail

Information on how the refrigerator's running state is remembered after power interruptions or settings changes.

Compressor

Compressor on and off Control specifications

Defines the conditions under which the compressor will start or stop, based on temperature and runtime.

Troubleshooting Method

No cooling (Air cooling-Electronic)

Troubleshooting flowchart for diagnosing and resolving issues related to the refrigerator and freezer not cooling.

No working of compressor

Diagnostic steps to identify why the compressor is not operating, checking power, PCB, and accessories.

Inside frosting, no defrosting

Troubleshooting guide for frost build-up inside the unit without proper defrosting, examining door seals and air ducts.

Inside frosting, no defrosting-Maintenance guidelines

Detailed maintenance guidelines for addressing internal frosting issues, covering door seals, air ducts, and sensors.

Light is not on

Troubleshooting steps for when the internal lights of the refrigerator are not functioning.

Fan failure

Diagnostic procedures for identifying and resolving issues related to fan operation or failure.

Defective defrost circuit

Steps to identify and resolve problems with the defrost circuit, including checking fuses, timers, and wiring.

Noise

Guidance on identifying the source of unusual noises within the refrigerator and potential solutions.

Air duct not operated(electronically)

Troubleshooting steps for when the air duct system is not functioning electronically, often related to airflow or noise.

Figures and details of repair parts

Entry Guidelines (TSP System)

Instructions for accessing the Midea TSP system, including website links and login credentials.

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