Mitsubishi Electric MSZ-A09NA User Manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································4
4. OUTLINES AND DIMENSIONS ·························6
5. WIRING DIAGRAM ············································8
6. REFRIGERANT SYSTEM DIAGRAM················9
7. SERVICE FUNCTIONS ····································10
8. TROUBLESHOOTING······································11
9. DISASSEMBLY INSTRUCTIONS ····················25
10. PARTS LIST······················································30
10-1. PARTS LIST·············································30
10-2. RoHS PARTS LIST··································36
11. MICROPROCESSOR CONTROL·····················42
Wireless type
Models
MSZ-A09NA
MSZ-A12NA
MSZ-A15NA
MSZ-A17NA
MSZ-A24NA
MSY-A15NA
MSY-A17NA
MSY-A24NA
No. OB450
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
MSZ-A09NA MSY-A15NA
MSZ-A12NA MSY-A17NA
MSZ-A15NA
MSZ-A17NA
INDOOR UNIT
Outdoor unit service manual
MUZ-A·NA Series (OB451)
MXZ-A·NA Series (OB444)
NOTE:
This service manual describes technical data of the intdoor units.
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the PARTS
LIST (RoHS compliant).
OB450-1.qxp 06.3.29 9:31 AM Page 1

Mitsubishi Electric MSZ-A09NA Specifications

General

Brand	Mitsubishi Electric
Model	MSZ-A09NA
Category	Air Conditioner
Language	English

Summary

2 PART NAMES AND FUNCTIONS

3 SPECIFICATION

4 OUTLINES AND DIMENSIONS

5 WIRING DIAGRAM

6 REFRIGERANT SYSTEM DIAGRAM

7 SERVICE FUNCTIONS

8 TROUBLESHOOTING

CAUTIONS AND GENERAL TROUBLESHOOTING PROCEDURES

Outlines safety precautions, general diagnosis steps, and battery replacement.

FAILURE ANALYSIS AND TABLES

Details failure mode recall, tables, and criteria for diagnosing component issues.

TROUBLESHOOTING FLOWS AND SPECIFIC CHECKS

Provides step-by-step troubleshooting flows and specific checks for common faults.

ELECTROMAGNETIC NOISE AND TEST POINTS

Addresses electromagnetic interference and provides test point diagrams for diagnosis.

8-2. FAILURE MODE RECALL FUNCTION

FAILURE MODE RECALL FUNCTION FLOW CHART

INDOOR UNIT FAILURE MODE TABLE

8-3. INSTRUCTION OF TROUBLESHOOTING

8-4. TROUBLESHOOTING CHECK TABLE

8-5. TROUBLE CRITERION OF MAIN PARTS

8-6. TROUBLESHOOTING FLOW

A CHECK OF INDOOR FAN MOTOR

B CHECK OF REMOTE CONTROLLER AND RECEIVER P.C. BOARD

C CHECK OF INDOOR ELECTRONIC CONTROL P.C. BOARD AND INDOOR FAN MOTOR

HOW TO CHECK MIS-WIRING AND SERIAL SIGNAL ERROR

8-7. TEST POINT DIAGRAM AND VOLTAGE

9 DISASSEMBLY INSTRUCTIONS

10 PARTS LIST

10-2. ROHS PARTS LIST (ROHS COMPLIANT)

11 MICROPROCESSOR CONTROL

REMOTE CONTROLLER AND INDOOR UNIT DISPLAY

OPERATING MODES

Details Cool, Dry, Heat, Fan, "I Feel Control", and Auto Change Over operating modes.

VANE OPERATION CONTROL

Describes the control mechanisms for horizontal and vertical vane movement.

TIMER AND EMERGENCY/TEST OPERATIONS

Covers setting timers, cancelling them, and using the emergency operation switch.

11-7. AUTO VANE OPERATION

HORIZONTAL VANE OPERATION

VERTICAL VANE OPERATION

11-8. TIMER OPERATION

SETTING AND CANCELLING TIMERS

11-9. EMERGENCY/TEST OPERATION