Midea MSG-07HR - User Manual

MSG-05CR
MSG-07CR; MSG-07HR
MSG-09CR; MSG-09HR
MSG-12CR; MSG-12HR
MSG-16CR; MSG-16HR
MSG-18CR; MSG-18HR
MSG-21CR; MSG-21HR

Summary

Safety and Precautions

1.1 Safety Precaution

General safety guidelines to prevent injury and property damage during air conditioner use.

1.2 Warning and Cautions

Critical warnings and cautions for safe installation, operation, and maintenance of the unit.

Operation Limits

Diagrams and Schematics

7.1 Schematic Diagram

Electrical schematic of the air conditioner's internal circuitry.

7.2 Wiring Diagram

Illustrates wiring connections between indoor/outdoor units and components.

Installation Procedures

8.1 Wrench Torque Specifications

8.3 Pipe Length and Elevation Limits

8.4 Air Purging Process

Step-by-step guide for removing air from refrigerant lines before operation.

8.5 Pumping Down for Re-installation

Procedure for safely recovering refrigerant during unit removal or relocation.

8.6 Re-air Purging Process

Steps for purging air and moisture when re-installing the unit.

8.7 Refrigerant Balancing

8.8 System Evacuation

8.9 Refrigerant Charging

Electronic Functions

10.1 Control Working Environment

10.2 Symbols and Meaning

10.3 Function Overview

10.4 Protection Mechanisms

Details the various protection features and fault conditions of the unit.

10.9 Defrosting Mode

Model Parameters

Model Parameters MSG-05 CR to MSG-12 HR

Model Parameters MSG-16 CR to MSG-21 HR

Troubleshooting Guide

12.1 Display Board Indicators

12.2 Failure Phenomena and Indicators

Lists failure phenomena and indicator lamp status for cooling and heat pump modes.

12.3 Diagnostic Chart

Flowchart to diagnose issues when the air conditioner cannot be operated.

12.4 Resetting Phenomenon Diagnosis

Diagnosing and resolving issues where the unit frequently resets during operation.

12.5 Operation Lamp Flashing: Timer Lamp Off

Troubleshooting steps for operation lamp flashing and timer lamp off.

12.6 Operation Lamp Flashing: Timer Lamp On

Troubleshooting steps for operation lamp flashing and timer lamp on.

12.7 Operation Lamp Off, Timer Lamp Flashes

Troubleshooting steps for operation lamp off and timer lamp flashes.

12.8 Operation Lamp On, Timer Lamp Flashes

Troubleshooting for EEROM error and defective indoor PCB.

12.9 Lamps Flash Together

Troubleshooting for alarm signal when the main chip fails to detect over-zero signal.

Midea MSG-07HR Specifications

General

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