Mitsubishi Electric MXZ-2A20NA-2 - User Manual

Models
SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES· ·································· 2
2. PART NAMES AND FUNCTIONS ····················· 6
3. INDOOR UNITS COMBINATION ······················ 7
4. SPECIFICATION ·············································· 43
5. NOISE CRITERIA CURVES ···························· 46
6. OUTLINES AND DIMENSIONS ······················ 47
7. WIRING DIAGRAM ·········································· 52
8. REFRIGERANT SYSTEM DIAGRAM ············· 58
9. DATA ································································ 64
10. ACTUATOR CONTROL ··································· 80
11. SERVICE FUNCTIONS ···································· 80
12. TROUBLESHOOTING ····································· 82
13. DISASSEMBLY INSTRUCTIONS ·················· 100
14. PARTS LIST ····················································112
15. RoHS PARTS LIST ········································ 120
16. OPTIONAL PARTS ········································ 136
No. OB444
REVISED EDITION-G
The Slim Line.
From Mitsubishi Electric.
TM
OUTDOOR UNIT
MXZ-2A20NA
MXZ-2A20NA -
1
MXZ-2A20NA -
2
MXZ-3A30NA
MXZ-3A30NA -
1
MXZ-4A36NA
NOTE:
• This service manual describes technical
data of the outdoor units.
• RoHS compliant products have <G> mark
on the spec name plate.
For servicing of RoHS compliant products,
refer to the RoHS Parts List.
MXZ-2A20NA
MXZ-2A20NA -
1
Indoor unit service manual
MSZ-A·NA Series (OB450)
SEZ-KD·NA.TH Series
Revision G:
• SPECIFICATION, NOISE CRITERIA CURVES
and OPTIONAL PARTS have been modified.
Please void OB444 REVISED EDITION-F.
SPLIT-TYPE AIR CONDITIONERS
HFC
utilized
R410A
33223
9700058

Summary

Technical Changes Overview

Outdoor Unit Component Identification

Indoor Unit Compatibility and Specifications

R410 A Refrigerant Handling and Safety

Outdoor Unit Technical Specifications

Noise Level Characteristics

Outdoor Unit Dimensions and Installation Space

Required Installation and Service Space

Details clearance requirements for installation and servicing.

Electrical Wiring Schematics

Refrigerant Circuit Layouts

Performance Data

Actuator Control

Sensor and Actuator Control Mapping

Details the relationship between system sensors and their corresponding actuators.

Service Functions

Pre-Heat Control Configuration

Explains the pre-heat function and its activation/deactivation.

Auto Line Correcting Functionality

Describes the process for automatic wiring and piping error detection.

Troubleshooting and Fault Diagnosis

Troubleshooting Safety Precautions

Essential safety precautions to follow before starting troubleshooting.

Failure Mode Recall Functionality

Instructions on how to recall and interpret system failure modes.

Troubleshooting Procedure Steps

Outlines the general procedure for diagnosing unit malfunctions.

Troubleshooting Check Tables

Comprehensive table mapping fault codes to symptoms and solutions.

Main Parts Trouble Criteria

Specifications and methods for testing key internal components.

Troubleshooting Flowcharts

Visual flowcharts to guide the diagnosis of common issues.

Test Point and Voltage Diagrams

Diagrams illustrating critical test points and voltage readings.

Disassembly Instructions

Compressor Removal Guide

Detailed steps for removing the compressor assembly.

Fan Motor Removal Guide

Step-by-step instructions for removing the fan motor.

4-Way Valve Removal Guide

Step-by-step instructions for removing the 4-way reversing valve.

Expansion Valve Removal Guide

Step-by-step instructions for removing the expansion valve.

Reactor Removal Guide

Step-by-step instructions for removing the electrical reactor.

Non-RoHS Compliant Parts List

Non-RoHS Structural and Functional Parts

Identifies structural and functional components for non-RoHS units.

Non-RoHS Functional and Electrical Parts

Lists functional and electrical parts for non-RoHS compliant units.

RoHS Compliant Parts List

RoHS Structural and Functional Parts

Identifies structural and functional components for RoHS compliant units.

RoHS Functional and Electrical Parts

Lists functional and electrical parts for RoHS compliant units.

Optional Parts

Different-Diameter Pipe Kit Details

Specifications for connecting pipes of varying diameters.

Air Outlet Guide Accessories

Information on accessories for adjusting air discharge direction.

Mitsubishi Electric MXZ-2A20NA-2 Specifications