Midea MSG-07HRN2 User Manual

MSG-07CRN2; MSG-07HRN2
MSG-09CRN2; MSG-09HRN2
MSG-12CRN2; MSG-12HRN2
MSG-16CRN2; MSG-16HRN2
MSG-18CRN2; MSG-18HRN2
MSG-21CRN2; MSG-21HRN2

Midea MSG-07HRN2 Specifications

General

Brand	Midea
Model	MSG-07HRN2
Category	Air Conditioner
Language	English

Summary

Safety Precautions and Warnings

Operational Cautions and Maintenance Advice

Indoor Unit Functions

Outdoor Unit Functions

Indoor Unit Dimensions

Outdoor Unit Dimensions

Air Conditioner Specifications (Models 07/09)

Air Conditioner Specifications (Models 09/12)

Air Conditioner Specifications (Models 16/18)

Air Conditioner Specifications (Models 18/21)

Refrigerant Cycle Diagrams

Cooling Only Cycle

Diagram showing the refrigerant path in cooling-only operation.

Heat Pump Mode Cycle

Diagram showing the refrigerant path in heat pump operation.

Operation Limits

Cooling Operation Limits

Chart showing allowable outdoor and indoor temperatures for cooling mode.

Heating Operation Limits

Chart showing allowable outdoor and indoor temperatures for heating mode.

Schematic Diagram

Wiring Diagrams - Cooling Mode (MSG-07/09/12CR)

Wiring Diagram - Cooling Mode (MSG-16CR)

Wiring Diagrams - Cooling Mode (MSG-18/21CR)

Wiring Diagrams - Heating Mode (MSG-07/09/12HR)

Wiring Diagrams - Heating Mode (MSG-16/18/21HR)

Installation Details

Installation Guidelines

Covers wrench torque, cable selection, and pipe length/elevation guidelines.

Air Purging Procedure

Pumping Down Procedure

Re-air Purging Procedure

Balance Refrigerant Procedure

Evacuation Procedure

Gas Charging Procedure

Capacity Table - MSG-07 Series

Capacity Table - MSG-09 Series

Capacity Table - MSG-12 Series

Capacity Table - MSG-16 Series

Capacity Table - MSG-18 Series

Capacity Table - MSG-21 Series

Electronic Function Overview

Electronic Control Details

Covers working environment, symbols, and core functions like remote receiving and protections.

Protection Mechanisms

Compressor Protection and Fan Modes

Explains compressor current protection, fan-only mode, and cooling mode fan control.

Operational Modes Explained

Dehumidifying and Heating Modes

Details dehumidifying mode actions and provides an overview of heating mode.

Advanced Operational Modes

Defrosting Mode Conditions

Explains the conditions and timings for initiating and ending defrosting cycles.

Auto and Sleep Modes

Auto Mode Selection Logic

Describes how the unit automatically selects cooling, heating, or fan-only modes.

Sleep Mode Operation

Details how temperature and fan speed adjust automatically for comfort during sleep.

Model and Parameter Reference

Protection Parameter Table

Lists protection current and temperature thresholds for different model series.

Troubleshooting - Display Board Indicators

Indicator Guide

Describes the behavior of operation, timer, PRE-DEF, AUTO, and ECON indicators.

Troubleshooting - Failure Phenomena

Failure Diagnosis Tables

Maps failure phenomena to lamp states in cooling and heat pump modes.

Diagnostic Chart for Non-Operation

Troubleshooting - Resetting and Lamp Issues

Resetting and Lamp Flash Troubleshooting

Flowcharts for diagnosing resetting issues and specific lamp flash patterns.

Temperature Sensor Characteristics