Mitsubishi Electric MS15NN 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 MS15NN Specifications

General

Brand	Mitsubishi Electric
Model	MS15NN
Category	Air Conditioner
Language	English

Summary

1 FEATURES

REMOTE CONTROLLER ADVANCEMENTS

2 TECHNICAL CHANGES

4 SPECIFICATIONS

UNIT AND REFRIGERANT SPECIFICATIONS

Details on indoor/outdoor units, refrigerant piping, and operating ranges.

STANDARD OPERATION DATA

Comprehensive operational data including capacity, power, and circuit details.

5 DATA

COOLING PERFORMANCE DATA

6 OUTLINES AND DIMENSIONS

7 WIRING DIAGRAM

INDOOR UNIT ELECTRICAL WIRING

Wiring diagrams for various indoor unit models.

OUTDOOR UNIT ELECTRICAL WIRING

Wiring diagrams for various outdoor unit models.

8 REFRIGERANT SYSTEM DIAGRAM

REFRIGERANT CIRCUIT DIAGRAMS

Visual representation of refrigerant flow for different unit configurations.

9 MICROPROCESSOR CONTROL

REMOTE CONTROLLER AND MODES OVERVIEW

"I FEEL CONTROL" AND DRY MODES

11 TROUBLESHOOTING

PRECAUTIONS AND BASIC PROCEDURES

Safety cautions, troubleshooting steps, and battery replacement guidelines.

COMPONENT AND SYSTEM DIAGNOSTICS

Detailed checks for parts and system malfunctions with charts.

TEST POINT DIAGRAMS AND VOLTAGES

Electrical diagrams and voltage test points for control boards.

12 RELAY OPERATION

12 DISASSEMBLY INSTRUCTIONS