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Mitsubishi MU12NN - User Manual

Mitsubishi MU12NN
57 pages
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SERVICE MANUAL
SPLIT-TYPE AIR CONDITIONERS
CONTENTS
1. FEATURES·························································3
2. TECHNICAL CHANGES ····································4
3. PART NAMES AND FUNCTIONS······················4
4. SPECIFICATIONS ··············································6
5. DATA···································································9
6. OUTLINES AND DIMENSIONS ·······················17
7. WIRING DIAGRAM ··········································19
8. REFRIGERANT SYSTEM DIAGRAM··············21
9. MICROPROCESSOR CONTROL ····················22
10. SERVICE FUNCTIONS·····································30
11. TROUBLESHOOTING······································31
12. DISASSEMBLY INSTRUCTIONS·····················39
13. PARTS LIST······················································47
14. OPTIONAL PARTS···········································55
Wireless type
Models
MS09NW
(WH)
· MU09NW
MS12NN
(WH)
· MU12NN
MS15NN
(WH)
· MU15NN
MS17NN
(WH)
· MU17NN
No. OB192
The Slim Line.
From Mitsubishi Electric.
L
I
S
T
E
D
R
MS12NN
MS15NN
MS17NN
INDOOR UNIT
MU12NN
MU15NN
MU17NN
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.
OB192--1.qxp 23/6/97 11:44 PM Page 1
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Mitsubishi MU12NN Specifications

General IconGeneral
BrandMitsubishi
ModelMU12NN
CategoryAir Conditioner
LanguageEnglish

Summary

1 FEATURES

I FEEL CONTROL Operation

Advanced feature for precise temperature control using the remote, memorizing user preferences.

Remote Operation Modes

Control airflow direction, vane swing, and utilize features like auto-restart for user convenience.

Compact Unit Design & Performance

Highlights the sleek, compact indoor unit and the high-performance rotary compressor.

2 TECHNICAL CHANGES

MS09 EW to MS09 NW Model Updates

Details changes in indoor/outdoor unit dimensions, refrigerant, and remote controller function.

MS12 EN;MS15 EN to MS12 NN;MS15 NN Updates

Outlines modifications to unit dimensions, refrigerant, remote control, and added auto vane function.

MS17 NN New Model Introduction

Indicates the introduction of the MS17NN as a new model in the series.

9 MICROPROCESSOR CONTROL

Remote Controller Functions

Overview of remote controller operations, display, and "I FEEL CONTROL" feature.

I FEEL CONTROL Operation Details

In-depth explanation of "I FEEL CONTROL" modes, temperature logic, and fuzzy control.

Operating Modes and Procedures

Guides for Cool, Dry, and Fan operations, including specific control mechanisms.

Vane Control Features

Covers auto vane operation, positioning, swing modes, and dew prevention settings.

7 TIMER OPERATION

Setting and Cancelling Timers

Provides instructions on how to set, use, and cancel ON/OFF timers and program timer combinations.

10 SERVICE FUNCTIONS

Auto Restart Function

Explains how the unit automatically restarts after power restoration, memorizing previous settings.

Timer Short Mode

Describes a service function to shorten timer delays by shorting specific connectors.

PC Board Modification for Operation

Details how to modify PC boards for individual indoor unit operation with multiple remote controllers.

11 TROUBLESHOOTING

Troubleshooting Cautions and Precautions

Outlines essential safety precautions and checks before performing troubleshooting procedures.

Troubleshooting Procedure Steps

Guides users through checking operation indicators, P.C. boards, and referencing diagnostic tables.

Remote Controller Battery Replacement

Instructions on how to replace batteries and reset the remote controller for proper function.

12 DISASSEMBLY INSTRUCTIONS

MS09 NW Indoor Unit Disassembly

Step-by-step guide for disassembling the MS09NW indoor unit, covering panel, boards, and fans.

MS12 NN;MS15 NN;MS17 NN Indoor Unit Disassembly

Procedures for disassembling these indoor unit models, including panels, boards, and fans.

MU09 NW Outdoor Unit Disassembly

Instructions for disassembling the MU09NW outdoor unit, focusing on cabinet, fan, and compressor removal.

MU12 NN;MU15 NN;MU17 NN Outdoor Unit Disassembly

Steps to disassemble these outdoor unit models, including cabinet, electrical parts, and compressor.

13 PARTS LIST

ACCESSORY AND REMOTE CONTROLLER PARTS

Remote Controller

Details the wireless remote controller unit and its function.

Remote Controller Holder

Describes the accessory holder for the remote controller.

14 OPTIONAL PARTS

Refrigerant Pipes

Information on optional refrigerant extension pipes, including sizes and lengths.

Air Cleaning Filter

Details the function, life, and handling of the air cleaning filter.

Deodorizing Filter

Explains the purpose, cleaning, and replacement of the deodorizing filter.

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