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Mitsubishi Electric MU12NN2 User Manual

Mitsubishi Electric MU12NN2
80 pages
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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.
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Mitsubishi Electric MU12NN2 Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMU12NN2
CategoryAir Conditioner
LanguageEnglish

Summary

FEATURES

NEW "I FEEL CONTROL" IN OUR LCD WIRELESS REMOTE CONTROLLER WITH ON/OFF PROGRAM TIMER

Advanced features for enhanced control and ease of use with a liquid crystal display.

REMOTE-CONTROL OPERATION MODE

Allows selection of five airflow settings and automatic vane swing for personalized comfort.

PART NAMES AND FUNCTIONS

INDOOR UNIT

Identifies and describes components of the indoor unit for MS09NW/MS09NW2.

OUTDOOR UNIT

Identifies and describes components of the outdoor unit for MU09NW/MU09NW2.

SPECIFICATIONS

Operating Range

Details the acceptable operating temperature ranges for cooling, both indoor and outdoor.

DATA

PERFORMANCE DATA

Provides cooling capacity and performance data for various models under different conditions.

PERFORMANCE CURVE

Graphical representation of total capacity and power consumption versus temperature.

CONDENSING PRESSURE AND SUCTION PRESSURE

Charts showing pressure variations based on outdoor ambient and indoor DB temperatures.

OPERATING RANGE

POWER SUPPLY

Specifies voltage ratings and guaranteed voltage ranges for indoor and outdoor units.

OPERATION

Defines standard temperature conditions for cooling operation.

OUTLINES AND DIMENSIONS

MS09NW MS09NW2 INDOOR UNIT

Provides detailed dimensions and installation specifications for the indoor unit.

MU09NW MU09NW2 OUTDOOR UNIT

Provides detailed dimensions and installation specifications for the outdoor unit.

WIRING DIAGRAM

MS09NW INDOOR UNIT

Electrical diagram illustrating the internal wiring of the MS09NW indoor unit.

MU09NW OUTDOOR UNIT

Electrical diagram illustrating the internal wiring of the MU09NW outdoor unit.

REFRIGERANT SYSTEM DIAGRAM

MS09NW MS09NW2 INDOOR UNIT

Illustrates the refrigerant flow and components within the indoor unit.

MU09NW MU09NW2 OUTDOOR UNIT

Illustrates the refrigerant flow and components within the outdoor unit.

MICROPROCESSOR CONTROL

WIRELESS REMOTE CONTROLLER

Explains the functions and operation of the wireless remote control unit.

INDOOR UNIT DISPLAY SECTION

Describes the operation indicator lamp and its states on the indoor unit.

SERVICE FUNCTIONS

AUTO RESTART FUNCTION

Details the unit's ability to restart automatically after a power interruption.

P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

Instructions for modifying PC boards to enable individual control of multiple indoor units.

TROUBLESHOOTING

Cautions on troubleshooting

Important safety precautions and preliminary checks before performing troubleshooting.

Instruction of troubleshooting

Step-by-step guide and flowcharts for diagnosing and resolving operational issues.

TEST POINT DIAGRAM AND VOLTAGE

Indoor electronic control P.C. board

Visual guide to test points and voltage readings on the indoor unit's electronic control board.

DISASSEMBLY INSTRUCTIONS

MS09NW MS09NW2 INDOOR UNIT

Step-by-step procedures for disassembling the MS09NW/MS09NW2 indoor unit.

MU09NW MU09NW2 OUTDOOR UNIT

Step-by-step procedures for disassembling the MU09NW/MU09NW2 outdoor unit.

PARTS LIST

INDOOR UNIT STRUCTURAL PARTS

Lists structural components for MS09NW/MS09NW2 indoor units with part numbers.

ACCESSORY AND REMOTE CONTROLLER

Lists accessories and remote controllers for MS09NW/MS09NW2 models.

OPTIONAL PARTS

REFRIGERANT PIPES

Details optional refrigerant extension pipes, including part numbers and specifications.

AIR CLEANING FILTER

Describes the air cleaning filter, its function, life, and maintenance.

DEODORIZING FILTER

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

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