Mitsubishi Electric MS09NW User Manual

SERVICE MANUAL
SPLIT-TYPE AIR CONDITIONERS
CONTENTS
1. FEATURES ························································2
2.TECHNICAL CHANGES ····································4
3. PART NAMES AND FUNCTIONS······················5
4. SPECIFICATIONS ··············································7
5. DATA ································································12
6. OUTLINES AND DIMENSIONS ······················23
7. WIRING DIAGRAM ··········································26
8. REFRIGERANT SYSTEM DIAGRAM ··············32
9. MICROPROCESSOR CONTROL ····················35
10. SERVICE FUNCTIONS ····································43
11. TROUBLESHOOTING ······································44
12. DISASSEMBLY INSTRUCTIONS ····················59
13. PARTS LIST······················································70
14. OPTIONAL PARTS ··········································79
Wireless type
Models
MS09NW
(W)
· MU09NW MUM30NN
MS12NN
(W)
· MU12NN MUM30NN2
MS15NN
(W)
· MU15NN
MS17NN
(W)
· MU17NN
MS09NW2
(W)
· MU09NW2
MS12NN2
(W)
· MU12NN2
MS15NN2
(W)
· MU15NN2
MS17NN2
(W)
· MU17NN2
No. OB192
The Slim Line.
From Mitsubishi Electric.
L
I
S
T
E
D
R
MS12NN MS12NN2
MS15NN MS15NN2
MS17NN MS17NN2
INDOOR UNIT
MU12NN MU12NN2
MU15NN MU15NN2
MU17NN MU17NN2
OUTDOOR UNIT
Remote
controller
Refer to our Service Manual OB202 when the
indoor unit is used in the multi-system operation.
Applied models are MS09NW and MS15NN.
REVISED EDITION -B
Revision:
● MS09NW2, MS12NN2, MS15NN2 and
MS17NN2 has been added.
● Parts List has been partially modified.
● Please void OB192 REVISED EDITION -A.

Mitsubishi Electric MS09NW Specifications

General

Brand	Mitsubishi Electric
Model	MS09NW
Category	Air Conditioner
Language	English

Summary

Features

New 'I Feel Control' Feature

Advanced remote controller features including 'I Feel Control' for precise temperature settings.

Remote Control Operation Modes

Selectable airflow settings and vane swing options via remote controller.

Technical Changes

Part Names and Functions

Specifications

Data

Performance Data

Cooling capacity, sensible heat, and power consumption data for various models.

Performance Curve

Graphical representation of cooling capacity and power consumption vs. operating conditions.

Outlines and Dimensions

Indoor Unit Dimensions (MS09NW/MS09NW2)

Physical dimensions and installation details for indoor units.

Outdoor Unit Dimensions (MU09NW/MU09NW2)

Physical dimensions and installation details for outdoor units.

Wiring Diagram

Indoor Unit Wiring Diagrams

Electrical wiring schematics for indoor units of various models.

Outdoor Unit Wiring Diagrams

Electrical wiring schematics for outdoor units of various models.

Refrigerant System Diagram

Refrigerant Flow Diagrams

Diagrams illustrating refrigerant flow for indoor and outdoor unit combinations.

Microprocessor Control

Remote Controller and Indoor Unit Display

Operation of wireless remote controller and indoor unit indicator lamps.

"I Feel Control" Operation Modes

Details on 'I Feel Control' modes including Cool, Dry, and Fan operations.

Timer and Emergency Operations

Procedures for setting timers and performing emergency/test operations.

Service Functions

Auto Restart Function

Unit automatically restarts in memorized conditions after power restoration.

Timer Short Mode

Service function to shorten timer settings via circuit shorting.

P.C. Board Modification for Individual Operation

Instructions for modifying PC boards to enable individual remote control.

Troubleshooting

Troubleshooting Cautions and Procedures

Important precautions, safety checks, and general troubleshooting steps.

Trouble Criteria for Main Parts

Resistance and voltage checks for diagnosing common part failures.

Disassembly Instructions

Indoor Unit Disassembly (MS09NW/MS09NW2)

Step-by-step guide for disassembling MS09NW and MS09NW2 indoor units.

Indoor Unit Disassembly (MS12/15/17NN)

Step-by-step guide for disassembling MS12NN, MS15NN, MS17NN indoor units.

Outdoor Unit Disassembly (MU09NW/MU09NW2)

Step-by-step guide for disassembling MU09NW and MU09NW2 outdoor units.

Outdoor Unit Disassembly (MU12/15/17NN)

Step-by-step guide for disassembling MU12/15/17NN outdoor units.

Outdoor Unit Disassembly (MUM30NN/MUM30NN2)

Step-by-step guide for disassembling MUM30NN and MUM30NN2 outdoor units.

Parts List

Indoor Unit Structural Parts

List of structural components for indoor units with part numbers.

Accessories and Remote Controller

List of accessories and remote controller parts with part numbers.

Optional Parts

Refrigerant Pipes

Specifications for optional refrigerant extension pipes.

Air Cleaning Filter

Information on the air cleaning filter, its life, and maintenance.

Deodorizing Filter

Information on the deodorizing filter, its cleaning, and replacement.