Mitsubishi Electric MXZ-4A80VA User Manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS ····················· 8
3. INDOOR/OUTDOOR
CORRESPONDENCE TABLE ························ 10
4. INDOOR UNITS COMBINATION ···················· 14
5. SPECIFICATION ·············································· 61
6. NOISE CRITERIA CURVES ···························· 66
7. OUTLINES AND DIMENSIONS ······················ 68
8. WIRING DIAGRAM ·········································· 75
9. REFRIGERANT SYSTEM DIAGRAM ············· 87
10. PERFORMANCE CURVES ····························· 97
11. ACTUATOR CONTROL ··································115
12. SERVICE FUNCTIONS ···································116
13. TROUBLESHOOTING ··································· 120
14. DISASSEMBLY INSTRUCTIONS ·················· 145
15. PARTS LIST ··················································· 160
16. RoHS PARTS LIST ········································ 172
17. OPTIONAL PARTS ······················ BACK COVER
Models
MXZ-2A30VA -
E1
MXZ-4A71VA -
E2
MXZ-2A30VA -
E2
MXZ-4A71VA -
E3
MXZ-2A40VA -
E1
MXZ-4A71VA -
E4
MXZ-2A40VA -
E2
MXZ-4A71VA -
E5
MXZ-2A52VA -
E1
MXZ-4A71VA -
E6
MXZ-2A52VA -
E2
MXZ-4A71VA -
E7
MXZ-3A54VA -
E1
MXZ-4A80VA -
E1
MXZ-3A54VA -
E2
MXZ-4A80VA -
E2
MXZ-3A54VA -
E3
MXZ-5A100VA -
E1
MXZ-3A54VA -
E4
MXZ-3A54VA -
E5
MXZ-3A54VA -
E6
MXZ-3A54VA -
E7
MXZ-4A71VA -
E1
No. OB377
REVISED EDITION-H
HFC
utilized
R410A
SPLIT-TYPE AIR CONDITIONERS
MXZ-4A80VA-
E1
Please void OB377 REVISED EDITION-G.
OUTDOOR UNIT
Revision H:
• Indoor units combinations for 42 class
have been added.
•
MXZ-3A54VA-
E7
and MXZ-4A71VA-
E7
have been added.
NOTE:
• RoHS compliant products have <G> mark on the spec
name plate.
For servicing of RoHS compliant products, refer to the
RoHS Parts List.
Indoor unit service manual
MSZ-FA•VA Series (OB371)
MSZ-GA•VA Series (OB378, OB388)
MSZ-CB•VA Series (OB441)
MSZ-GC•VA Series (OBH468)
MSZ-GE•VA Series (OBH515)
MSZ-FD•VA Series (OBH488)

Mitsubishi Electric MXZ-4A80VA Specifications

General

Brand	Mitsubishi Electric
Model	MXZ-4A80VA
Category	Air Conditioner
Language	English

Summary

Technical Changes

Technical Changes: Revision A

Technical Changes: Revision B

Technical Changes: Revision C

Technical Changes: Revision D

Technical Changes: Revision E

Technical Changes: Revision F

Technical Changes: Revision G

Technical Changes: Revision H

Part Names and Functions

Specification

Specifications: MXZ-2A30VA

Provides detailed technical specifications for the MXZ-2A30VA outdoor unit.

Outlines and Dimensions

Wiring Diagram

Wiring Diagram: MXZ-2A Series

Details the electrical connections and components for MXZ-2A30VA, MXZ-2A40VA, MXZ-2A52VA outdoor units.

Refrigerant System Diagram

Refrigerant System Diagram: MXZ-2A30VA

Illustrates the refrigerant circuit, components, and piping for the MXZ-2A30VA outdoor unit.

Refrigerant System: Piping Lengths and Charges

Performance Curves

Service Functions: Locking Operation Mode

Service Functions: Pre-Heat Control

Service Functions: Auto Line Correcting Function

Troubleshooting

Troubleshooting: Cautions on Troubleshooting

Provides critical safety and procedural warnings before starting troubleshooting.

Troubleshooting: Failure Mode Recall Function

Explains how to recall memorized abnormal conditions for units where issues do not recur.

Troubleshooting: Instruction of Troubleshooting

Outlines the steps to identify and diagnose abnormalities, including checking indicator lamps and P.C. boards.

Troubleshooting: Check Table

Lists symptoms, abnormal points, LED indications, conditions, and correspondences for troubleshooting.

Troubleshooting: Main Parts Criteria

Provides test methods and criteria for diagnosing common outdoor unit components like thermistors and motors.

Troubleshooting: Flowcharts

Offers step-by-step diagnostic guides for specific issues like outdoor unit non-operation.

Troubleshooting: Test Point Diagram and Voltage

Illustrates test points and voltage readings for diagnosing P.C. boards and components.

Disassembly Instructions

Disassembly Instructions: MXZ-2A Series

Step-by-step guide for disassembling MXZ-2A30VA, MXZ-2A40VA, MXZ-2A52VA outdoor units.

Disassembly Instructions: MXZ-3A/4A Series

Disassembly Instructions: MXZ-4A80VA Series

Disassembly Instructions: MXZ-4A80VA/5A100VA Series

Parts List (non-RoHS compliant)

Parts List: Structural and Functional Parts

RoHS Parts List (RoHS compliant)

RoHS Parts List: Structural and Functional Parts