Mitsubishi MS09NW User Manual

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

Mitsubishi MS09NW Specifications

General

Brand	Mitsubishi
Model	MS09NW
Category	Air Conditioner
Language	English

Summary

FEATURES

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

AUTO-RESTART FUNCTION

PART NAMES AND FUNCTIONS

REMOTE CONTROLLER

INDOOR UNIT

OUTDOOR UNIT

SPECIFICATIONS

INDOOR UNIT MODEL

Specifies model names, cooling capacity, and SEER ratings for indoor units.

OUTDOOR UNIT MODEL

Specifies model names, power supply, and compressor details for outdoor units.

Operating Range

DATA

1) PERFORMANCE DATA

Provides performance data tables for cooling capacity under various conditions.

2. PERFORMANCE CURVE

Illustrates performance curves for cooling capacity and power consumption.

3. CONDENSING PRESSURE AND SUCTION PRESSURE

Shows charts for condensing and suction pressure vs. temperature.

STANDARD OPERATION DATA

OUTLINES AND DIMENSIONS

INDOOR UNIT

Shows dimensions and installation details for MS12NN/15NN/17NN indoor units.

OUTDOOR UNIT

Shows dimensions and installation details for MU12NN/15NN/17NN outdoor units.

WIRING DIAGRAM

INDOOR UNIT

Wiring diagram for MS12NN/15NN/17NN indoor units.

OUTDOOR UNIT

Wiring diagram for MU12NN/15NN/17NN outdoor units.

REFRIGERANT SYSTEM DIAGRAM

MS09NW / MU09NW

Refrigerant system diagram for the MS09NW indoor and MU09NW outdoor units.

MS12NN / MU12NN MS15NN / MU15NN MS17NN / MU17NN

Refrigerant system diagrams for other model series.

MICROPROCESSOR CONTROL

Wireless remote controller

Details the wireless remote controller's functions, operation, and indicators.

COOL mode of "I FEEL CONTROL"

-DRY mode of "I FEEL CONTROL" -

2. COOL OPERATION

3. DRY OPERATION

EMERGENCY-TEST OPERATION

MS09NW

Details the emergency operation for the MS09NW unit.

MS12NN MS15NN MS17NN

Details the emergency operation for MS12NN, MS15NN, MS17NN units.

TROUBLESHOOTING

11-1 Cautions on troubleshooting

11-1-2 Take care the followings during servicing.

11-1-3 Troubleshooting procedure

Outlines the general procedure for troubleshooting abnormalities.

11-2 Instruction of troubleshooting

Provides a flowchart for troubleshooting unit operation issues.

11-2-1 troubleshooting check table

A table listing symptoms, detection methods, and repairs for self-checks.

11-2-2 Trouble criterion of main parts

Details troubleshooting criteria for key components like thermistors and motors.

A Check of indoor fan motor

Troubleshooting steps for when the indoor fan motor does not operate.

B Check of receiver P.C. board

Troubleshooting steps for when the unit does not operate with the remote controller.

C Check of indoor electronic control P.C. board

Troubleshooting steps for the indoor electronic control P.C. board.

D Check of outdoor unit

Troubleshooting steps for when the compressor and outdoor fan do not operate.

DISASSEMBLY INSTRUCTIONS

12-1 MS09NW INDOOR UNIT: Removing the front panel

Steps to remove the front panel of the MS09NW indoor unit.

12-1 MS09NW INDOOR UNIT: Removing the electronic control P.C. board

Steps to remove the electronic control P.C. board and display P.C. board.

12-1 MS09NW INDOOR UNIT: Removing the electrical box

Steps to remove the electrical box from the indoor unit.

12-1 MS09NW INDOOR UNIT: Removing the vane motor

Steps to remove the vane motor from the indoor unit.

12-1 MS09NW INDOOR UNIT: Removing the line flow fan and indoor fan motor

Steps to remove the line flow fan and indoor fan motor.

12-2 MS12NN, MS15NN, MS17NN INDOOR UNIT: Removing the front panel

12-2 MS12NN, MS15NN, MS17NN INDOOR UNIT: Removing the electronic control P.C. board

12-2 MS12NN, MS15NN, MS17NN INDOOR UNIT: Removing the indoor fan motor and line flow fan

12-3 MU09NW OUTDOOR UNIT: Removing the cabinet

12-3 MU09NW OUTDOOR UNIT: Removing the propeller fan and outdoor fan motor

12-3 MU09NW OUTDOOR UNIT: Removing the compressor

12-4 MU12NN, MU15NN, MU17NN OUTDOOR UNIT: Removing the cabinet

12-4 MU12NN, MU15NN, MU17NN OUTDOOR UNIT: Removing the electrical parts

12-4 MU12NN, MU15NN, MU17NN OUTDOOR UNIT: Removing the outdoor fan motor

12-4 MU12NN, MU15NN, MU17NN OUTDOOR UNIT: Removing the compressor