Mitsubishi Mr.Slim MSZ-A12NA Operating Instructions Manual
Split-type air conditioners
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SPLIT-TYPE AIR CONDITIONERS
OPERATING INSTRUCTIONS
MSZ-A09NA
MSZ-A12NA
MSZ-A15NA
MSZ-A17NA
For customers
Thank you very much for purchasing this Mitsubishi room air conditioner.
• To use this unit correctly and safely, be sure to read this operating instructions before use. Keep this manual carefully for
later reference.
• Be sure to receive a guarantee card from your dealer and check that the purchased date and shop name, etc. are entered
correctly.
• This air conditioner should not be installed by the customer. (Safety and performance functions cannot be assured.)
CONTENTS
.........................................................................................................................2
NAME OF EACH PART ....................................................................................................................................3
PREPARATION BEFORE OPERATION .........................................................................................................4
AUTO CHANGEOVER... AUTO MODE OPERATION ...............................................................................6
MANUAL OPERATION (COOL, DRY, HEAT)...............................................................................................7
AIR FLOW VELOCITY AND DIRECTION ADJUSTMENT .........................................................................7
POWERFUL OPERATION ...............................................................................................................................9
ECONO COOL OPERATION ..........................................................................................................................9
TIMER OPERATION (ON/OFF TIMER) ......................................................................................................10
FOR A LONG TIME .........................................................................................................................................10
MAINTENANCE ..............................................................................................................................................10
CLEANING THE FRONT PANEL .................................................................................................................. 11
CLEANING THE AIR FILTER (CATECHIN) ................................................................................................. 11
CLEANING THE AIR CLEANING FILTER....................................................................................................12
REPLACEMENT OF THE AIR CLEANING FILTER....................................................................................12
CHECK THE FOLLOWING AGAIN ..............................................................................................................13
WHEN YOU THINK THAT TROUBLE HAS OCCURRED........................................................................13
INSTALLATION, RELOCATION AND INSPECTION................................................................................14
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Table of Contents
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Summarization of Contents
Safety Precautions
General Safety Warnings
Highlights critical safety instructions and precautions for preventing hazards.
Name of Each Part
Indoor Unit Components
Identifies and labels the various parts of the indoor air conditioner unit.
Outdoor Unit Components
Identifies and labels the various parts of the outdoor air conditioner unit.
Preparation Before Operation
Auto Restart Functionality
Explains the unit's ability to resume operation automatically after a power interruption.
Power Breaker Connection
Instructions on connecting the air conditioner's power supply via the breaker.
Remote Controller and Emergency Operation
Remote Controller Handling
Guidance on using and maintaining the remote control unit.
Emergency Operation Mode
Instructions for operating the unit manually without the remote controller.
Auto Mode Operation
Detailed Auto Restart Function Description
Detailed explanation of the automatic restart feature after power loss.
Multi-System Air Conditioner Information
Details specific to operating multi-unit systems.
Manual Operation Modes
Cool, Dry, and Heat Mode Selection
How to select and operate the unit in manual cooling, drying, or heating modes.
Temperature Adjustment
Instructions for adjusting the temperature settings up or down.
Air Flow Adjustment
Air Flow Velocity Control
How to adjust the fan speed for different airflow levels.
Air Flow Direction Control
How to adjust the vertical and horizontal vanes for airflow direction.
Special Operation Modes
Powerful Operation
How to activate a mode for rapid heating or cooling.
Econo Cool Operation
How to perform energy-saving cooling operation with enhanced comfort.
Timer Functions
ON/OFF Timer Operation
How to set the timer for automatic ON or OFF operation.
Long-Term Storage and Usage
When Not in Use for Extended Periods
Instructions for preparing the unit for long-term storage.
When Ready for Reuse
Steps to take before operating the unit again after storage.
Maintenance Procedures
Before Starting Maintenance
Important safety step to turn off the breaker before cleaning.
Cleaning the Indoor Unit
Instructions for cleaning the main body of the indoor unit.
Cleaning the Air Filter (Catechin)
How to remove and clean the primary air filter.
Cleaning the Air Cleaning Filter
Instructions for cleaning the air cleaning filter.
Replacing the Air Cleaning Filter
Guidance on when and how to replace the air cleaning filter.
Troubleshooting Guide
Cannot Operate or Abnormal Sounds
Addresses issues like unit not operating, cracking sounds, or strange smells.
Operation Issues and Airflow Problems
Covers fan not rotating, water sounds, mist discharge, and cooling efficiency.
External Unit and Operation Changes
Explains issues like water leaks, white smoke, and automatic direction changes.
Installation, Relocation, and Inspection
Installation Considerations
Guidance on proper installation location and electrical safety.
Inspection and Maintenance Recommendations
Advice on periodic professional inspection for optimal performance.
Relocation and Disposal
Instructions for moving or disposing of the air conditioner unit.
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