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Midea EL-KFR90GW/Y-A(B) User Manual

Midea EL-KFR90GW/Y-A(B)
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Website: www.mideaaircon.com
Service manual
CAUTION
- BEFORE SERVICING THE UNIT, READ THE SAFETY
- PRECAUTIONS IN THIS MANUAL.
- ONLY FOR AUTHORIZED SERVICE PERSONNEL.
MODELS:
EL-KF20GW/N2Y-A(B) EL-KFR20GW/N2Y-A(B) EL-KF26GW/N2Y-A(B) EL-KFR26GW/N2Y-A(B)
EL-KF36GW/N2Y-A(B) EL-KFR36GW/N2Y-A(B) EL-KF50GW/N2Y-A(B) EL-KFR50GW/N2Y-A(B)
EL-KF61GW/N2Y-A(B) EL-KFR61GW/N2Y-A(B) EL-KF70GW/N2Y-A(B) EL-KFR70GW/N2Y-A(B)
EL-KFR20GW/N1Y-A(B) EL-KFR26GW/N1Y-A(B) EL-KFR36GW/N1Y-A(B)
EL-KF20GW/Y-A(B) EL-KFR20GW/Y-A(B) EL-KF26GW/Y-A(B) EL-KFR26GW/Y-A(B)
EL-KF32GW/Y-A(B) EL-KFR32GW/Y-A(B) EL-KF36GW/Y-A(B) EL-KFR36GW/Y-A(B)
EL-KF50GW/Y-A(B) EL-KFR50GW/Y-A(B) EL-KF61GW/Y-A(B) EL-KFR61GW/Y-A(B)
EL-KF70GW/Y-A(B) EL-KFR70GW/Y-A(B) EL-KF90GW/Y-A(B) EL-KFR90GW/Y-A(B)
EL-KF90GW/SY-A(B) EL-KFR90GW/SY-A(B) AU-KF61GW/Y-A(B) AU-KFR61GW/Y-A(B)
AU-KF70GW/Y-A(B) AU-KFR70GW/Y-A(B) AU-KF85GW/Y-A(B) AU-KFR85GW/Y-A(B)
EL1-KF20GW/Y-A(B) EL1-KFR20GW/Y-A(B) EL1-KF26GW/Y-A(B) EL1-KFR26GW/Y-A(B)
EL1-KF32GW/Y-A(B) EL1-KFR32GW/Y-A(B) EL1-KF20GW/N2Y-A(B) EL1-KFR20GW/N2Y-A(B)
EL1-KF26GW/N2Y-A(B) EL1-KFR26GW/N2Y-A(B) EL1-KF35GW/N2Y-A(B) EL1-KFR35GW/N2Y-A(B)
EL-KT3F53GW/Y-T2 EL-KT3F53GW/Y-T1 EL-KT3FR53GW/Y-T1
EL-KT3F70GW/Y-T2 EL-KT3F70GW/Y-T1 EL-KT3FR70GW/Y-T1
SEL-KF20GW/Y-A(B) SEL-KFR20GW/Y-A(B) SEL-KF26GW/Y-A(B) SEL-KFR26GW/Y-A(B)
SEL-KF32GW/Y-A(B) SEL-KFR32GW/Y-A(B) SEL-KF53GW/Y-A(B) SEL-KFR53GW/Y-A(B)
SEL-KF61GW/Y-A(B) SEL-KFR61GW/Y-A(B) SEL-KF70GW/Y-A(B) SEL-KFR70GW/Y-A(B)
SEL1-KF26GW/Y-A(B) SEL1-KFR26GW/Y-A(B) SEL1-KF36GW/Y-A(B) SEL1-KFR36GW/Y-A(B)
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Midea EL-KFR90GW/Y-A(B) Specifications

General IconGeneral
BrandMidea
ModelEL-KFR90GW/Y-A(B)
CategoryAir Conditioner
LanguageEnglish

Summary

CAUTION

PREFACE

SAFETY PRECAUTIONS

Guidelines for safe servicing procedures and precautions to prevent hazards.

INSULATION RESISTANCE TEST

Procedure for testing insulation resistance to prevent electrical hazards.

FEATURES

Overview of the air conditioner's key functionalities and capabilities.

CONTROL LOCATIONS

Details on the location and function of controls on the unit and remote.

OUTSIDE DIMENSIONS

Indoor Unit Dimensions

Detailed dimensions and size classifications for various indoor unit models.

Installation Plate Details

Diagrams and specifications for the installation plate and mounting clearances.

Outdoor Unit Dimensions

Detailed dimensions and size classifications for various outdoor unit models.

INSTALLATION

Tools for Installation

List of essential tools required for the proper installation of the air conditioner unit.

Required Installation Items

List of accessories and materials needed for unit installation.

Indoor and Outdoor Unit Installation

Detailed steps for installing both the indoor and outdoor components of the air conditioner.

Piping Length and Elevation

Specifications for piping length, elevation, and related considerations.

Installation Plate Fitting

Instructions for fitting and securing the installation plate to the wall.

Wall Hole Drilling

Guidance on drilling holes for piping and conduit through the wall.

FLARING WORK AND PIPING CONNECTION

Flaring Work Procedure

Detailed procedure for performing correct flaring work on refrigerant pipes.

Pipe Burr Removal

Steps to remove burrs from cut pipe sections to ensure proper sealing.

Flare Nut Installation

Instructions for correctly placing flare nuts onto the pipes before flaring.

Indoor Pipe Connection

Steps for connecting refrigerant pipes and drain hose to the indoor unit.

Rear Right Piping Installation

Procedure for routing piping and cables for rear right installation of the indoor unit.

Rear Left Piping Installation

Procedure for routing piping and cables for rear left installation of the indoor unit.

Outdoor Pipe Connection

Steps for connecting refrigerant pipes to the outdoor unit.

ELECTRICAL CABLE CONNECTION

Electrical Connection Safety

Ensure all electrical work complies with relevant standards and electrical safety rules.

Electrical Connection Notes

Important notes regarding power source, circuit breakers, and earthing requirements.

Indoor Unit Cable Connection

Connecting the electrical cable to the indoor unit's terminals.

Outdoor Unit Cable Connection

Connecting the electrical cable to the outdoor unit's control board and terminals.

DRAINAGE AND PIPING FORMATION

Drainage Check

Procedures to check the indoor unit's drainage system for proper water flow.

Drain Piping Guidelines

Guidelines for correct drain hose orientation and avoiding issues like water blockage.

Piping Insulation and Formation

Instructions for insulating and securing the refrigerant piping.

Outdoor Unit Position Piping

Procedures for forming piping based on outdoor unit installation position relative to indoor unit.

AIR PURGING AND EVACUATION

Importance of Air Purging

Explanation of why air purging is necessary and its effects on system performance.

Vacuum Pump Evacuation

Detailed steps for evacuating the system using a vacuum pump and nitrogen.

Refrigerant Leak Testing

Method for checking refrigerant joints and valves for leaks using soap water.

Evacuation Process

Procedure for evacuating the tubing and indoor unit using a vacuum pump.

Finalizing Evacuation

Final steps for completing the air purging process and preparing for test run.

TEST RUNNING AND PERFORMANCE EVALUATION

Outdoor Unit Securing

Proper anchoring and securing of the outdoor unit to prevent vibration and movement.

Remote Control Preparation

Instructions for installing batteries and preparing the remote control for operation.

Indoor Unit Operation Test

Steps to run the unit using the indoor unit's manual control switch.

Performance Evaluation

Checking system performance, refrigerant charge, and air intake/discharge temperatures.

Pump Down Procedure

Procedure for collecting refrigerant in the outdoor unit for servicing or relocation.

TROUBLESHOOTING GUIDE

Refrigeration Cycle Diagrams

Schematic diagrams illustrating the refrigeration cycle for reverse cycle and cooling-only models.

Troubleshooting Overview and Limits

Classification of common troubles, voltage limits, and temperature operation limits.

LED Error Indication and Troubleshooting

Tables mapping LED error indications to failure phenomena for troubleshooting.

Troubleshooting Flowchart

A decision tree diagram to diagnose and resolve unit operating problems.

Abnormal Noise Diagnosis and Remedies

Causes and remedies for abnormal noises originating from indoor and outdoor units.

Insufficient Cooling/Heating Solutions

Common causes and solutions for poor cooling or heating performance.

Indoor Unit Water Leakage

Troubleshooting steps for water leakage issues from the indoor unit.

Zero-Crossing Error Diagnosis

Diagnosis and correction for zero-crossing errors, potentially related to wiring or EMC.

Cooling/Heating Performance Issues

Further causes and remedies for inadequate cooling or heating output.

WIRING DIAGRAMS

Indoor Unit Wiring Diagrams

Electrical schematics detailing wiring connections for various indoor unit models.

OUTDOOR UNIT WIRING DIAGRAMS

Outdoor Unit Model Wiring

Specific wiring diagrams tailored to different outdoor unit model series.

EXPLODED VIEWS

REPLACEMENT PARTS LIST

SPECIFICATIONS

MODEL CHECK LIST

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