Mitsubishi Electric MXZ-5B42NA User Manual

Models
SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS ····················· 3
3. SPECIFICATION ················································ 4
4. NOISE CRITERIA CURVES ······························ 9
5. OUTLINES AND DIMENSIONS ·······················11
6. WIRING DIAGRAM ·········································· 15
7. REFRIGERANT SYSTEM DIAGRAM ············· 19
8. DATA ································································ 27
9. ACTUATOR CONTROL ··································· 54
10. SERVICE FUNCTIONS ···································· 54
11. TROUBLESHOOTING ····································· 56
12. DISASSEMBLY INSTRUCTIONS ···················· 82
INDOOR UNITS COMBINATION TABLES
No. OBH560
REVISED EDITION-G
OUTDOOR UNIT
MXZ-2B20NA, -
1
MXZ-3B24NA, -
1
MXZ-3B30NA, -
1
MXZ-4B36NA, -
1
MXZ-5B42NA
MXZ-2B20NA
Indoor unit service manual
MSZ-A·NA Series (OB450)
MSZ-FD·NA Series (OBH497)
MSZ-FE·NA Series (OBH542)
MSZ-GE·NA Series (OBH548)
MFZ-KA·NA Series(OBH568)
SEZ-KD·NA.TH Series
SPLIT-TYPE AIR CONDITIONERS
HFC
utilized
R410A
TM
Please void OBH560 REVISED EDITION-F.
PARTS CATALOG (OBB560)
Revision G:
• MXZ-5B42NA has been added.

Mitsubishi Electric MXZ-5B42NA Specifications

General

Brand	Mitsubishi Electric
Model	MXZ-5B42NA
Category	Air Conditioner
Language	English

Summary

3. SPECIFICATION

5. OUTLINES AND DIMENSIONS

6. WIRING DIAGRAM

MXZ-2B20NA Wiring Diagram

Provides the electrical wiring diagram for the MXZ-2B20NA outdoor unit.

MXZ-3B24NA / MXZ-3B30NA / MXZ-4B36NA Wiring Diagram

Electrical wiring diagrams for MXZ-3B24NA, MXZ-3B30NA, and MXZ-4B36NA outdoor units.

MXZ-5B42NA Wiring Diagram

7. REFRIGERANT SYSTEM DIAGRAM

MXZ-2B20NA Refrigerant System Diagram

MXZ-3B24NA / MXZ-3B30NA Refrigerant System Diagram

MXZ-4B36NA Refrigerant System Diagram

MXZ-5B42NA Refrigerant System Diagram

8. DATA

MXZ-2B20NA Data

MXZ-3B24NA Data

MXZ-3B30NA Data

MXZ-4B36NA Data

MXZ-5B42NA Data

10. SERVICE FUNCTIONS

10-1. PRE-HEAT CONTROL

10-2. AUTO LINE CORRECTING

11. TROUBLESHOOTING

11-1. CAUTIONS ON TROUBLESHOOTING

Important safety precautions and checks before performing troubleshooting.

11-2. FAILURE MODE RECALL FUNCTION

How to recall and interpret memorized abnormal conditions.

11-3. INSTRUCTION OF TROUBLESHOOTING

General procedure for diagnosing problems, checking indoor and outdoor units.

11-4. TROUBLESHOOTING CHECK TABLE

Table listing LED indications, abnormal points, conditions, and remedies for errors.

11-5. TROUBLE CRITERION OF MAIN PARTS

Criteria for checking resistance and voltage of key components like thermistors and motors.

11-6. TROUBLESHOOTING FLOW

Flowcharts for troubleshooting specific issues like power supply or reactor problems.

12. DISASSEMBLY INSTRUCTIONS