Mitsubishi Electric MXZ-A32WV User Manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································3
2. PART NAMES AND FUNCTIONS······················7
3. INDOOR/OUTDOOR
CORRESPONDENCE TABLE ···························7
4. INDOOR UNITS COMBINATION ·····················10
5. SPECIFICATION···············································21
6. NOISE CRITERIA CURVES·····························23
7. OUTLINES AND DIMENSIONS ·······················24
8. WIRING DIAGRAM ··········································27
9. REFRIGERANT SYSTEM DIAGRAM··············30
10. PERFORMANCE CURVES······························33
11. MICROPROCESSOR CONTROL·····················47
12. TROUBLESHOOTING······································52
13. DISASSEMBLY INSTRUCTIONS·····················71
14. PARTS LIST······················································78
15. OPTIONAL PARTS···········································83
Inverter-controlled multi system
Models
MXZ-A18WV -
MXZ-A26WV -
MXZ-A32WV -
E1
E1
E1
No. OB319
HFC
utilized
R410A
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
MXZ-A18WV -
E1
Indication of model name
NOTE:
•The description for MXZ-A18WV- has been transferred here from service manual OB307 REVISED
EDITION-A.
•SPECIFICATION, PERFORMANCE CURVES and PARTS LIST of MXZ-A18WV- have been partially
modified.
•This service manual describes technical data of outdoor units.
As for indoor units, refer to the service manual OB307 REVISED EDITION-A, OB321, OB327 or B329.
E1
E1
OB319--1.qxp 03.12.3 0:54 PM Page 1

Mitsubishi Electric MXZ-A32WV Specifications

General

Brand	Mitsubishi Electric
Model	MXZ-A32WV
Category	Air Conditioner
Language	English

Summary

TECHNICAL CHANGES

MXZ-18TV to MXZ-A18WV Model Updates

Details technical changes from the MXZ-18TV-E2 to MXZ-A18WV-E1.

MXZ-24UV to MXZ-A26WV Model Updates

Details technical changes from the MXZ-24UV-E2 to MXZ-A26WV-E1.

MXZ-32SV to MXZ-A32WV Model Updates

Details technical changes from the MXZ-32SV-E2 to MXZ-A32WV-E1.

R410A REFRIGERANT INFORMATION

R410A vs. R22 Refrigerant Properties

Compares properties of R410A refrigerant with R22.

Compressor Oil Handling for R410A Systems

Explains oil separation and backflow in R410A compressor systems.

R410A TOOLS AND REFRIGERANT PIPING

Dedicated Tools for R410A Refrigerant

Lists R410A specific tools and potential substitutions for R22 tools.

Refrigerant Piping Specifications

Details required pipe diameters, wall thickness, and insulation.

PART NAMES AND FUNCTIONS

Outdoor Unit Component Identification

Identifies major parts of the outdoor unit for MXZ-A18WV.

Outdoor Unit Accessories

Lists accessories included with the outdoor unit.

INDOOR/OUTDOOR CORRESPONDENCE TABLES

MXZ-A18WV Indoor/Outdoor Unit Combinations

Lists valid combinations of indoor and outdoor units for MXZ-A18WV.

MXZ-A26WV Indoor/Outdoor Unit Combinations

Lists valid combinations of indoor and outdoor units for MXZ-A26WV.

MXZ-A32WV Indoor/Outdoor Unit Combinations

Lists valid combinations of indoor and outdoor units for MXZ-A32WV.

INDOOR UNITS COMBINATION DETAILS

MXZ-A18WV Combination Capacities & Data

Details cooling/heating capacities and electrical data for MXZ-A18WV combinations.

MXZ-A26WV Combination Capacities & Data

Details cooling/heating capacities and electrical data for MXZ-A26WV combinations.

MXZ-A32WV Combination Capacities & Data

Details cooling/heating capacities and electrical data for MXZ-A32WV combinations.

SPECIFICATIONS

MXZ-A18WV Outdoor Unit Specifications

Lists electrical, physical, and performance data for MXZ-A18WV.

MXZ-A26WV & MXZ-A32WV Outdoor Unit Specifications

Lists electrical, physical, and performance data for MXZ-A26WV/A32WV.

NOISE CRITERIA CURVES

MXZ-A18WV Noise Performance

Presents octave band sound pressure levels for MXZ-A18WV.

MXZ-A26WV/A32WV Noise Performance

Presents octave band sound pressure levels for MXZ-A26WV/A32WV.

OUTLINES AND DIMENSIONS

MXZ-A18WV Outdoor Unit Dimensions & Space

Shows physical dimensions and required installation clearances for MXZ-A18WV.

MXZ-A26WV Outdoor Unit Dimensions & Space

Shows physical dimensions and required installation clearances for MXZ-A26WV.

MXZ-A32WV Outdoor Unit Dimensions & Space

Shows physical dimensions and required installation clearances for MXZ-A32WV.

WIRING DIAGRAMS

MXZ-A18WV Outdoor Unit Wiring Diagram

Illustrates the electrical connections for the MXZ-A18WV outdoor unit.

MXZ-A26WV Outdoor Unit Wiring Diagram

Illustrates the electrical connections for the MXZ-A26WV outdoor unit.

MXZ-A32WV Outdoor Unit Wiring Diagram

Illustrates the electrical connections for the MXZ-A32WV outdoor unit.

REFRIGERANT SYSTEM DIAGRAMS

MXZ-A18WV Refrigerant Flow and Piping Limits

Shows refrigerant flow and maximum piping length for MXZ-A18WV.

MXZ-A26WV Refrigerant Flow and Piping Limits

Shows refrigerant flow and maximum piping length for MXZ-A26WV.

MXZ-A32WV Refrigerant Flow and Piping Limits

Shows refrigerant flow and maximum piping length for MXZ-A32WV.

PERFORMANCE CURVES

Capacity and Input Curves by Temperature

Shows cooling/heating capacity and input vs. indoor/outdoor temperatures.

Inverter Frequency vs. Capacity/Input

Illustrates how capacity and input change with inverter frequency.

Outdoor Pressure & Current vs. Temperature

Shows outdoor low pressure and current based on ambient conditions.

MICROPROCESSOR CONTROL SYSTEMS

Inverter Multi System Control Logic

Diagrams the control logic for inverter multi systems.

Temperature and Fan Control Logic

Explains defrost, discharge temp protection, and fan speed controls.

TROUBLESHOOTING GUIDES

General Troubleshooting Cautions and Procedures

Provides safety warnings and a general troubleshooting workflow.

Outdoor Unit LED Error Indicators

Lists error codes indicated by outdoor unit LEDs and their symptoms.

Specific Fault Diagnosis Flows

Step-by-step troubleshooting for common operational failures.

DISASSEMBLY INSTRUCTIONS

MXZ-A18WV Outdoor Unit Disassembly Steps

Provides detailed instructions for dismantling the MXZ-A18WV outdoor unit.

MXZ-A26WV/A32WV Outdoor Unit Disassembly Steps

Provides detailed instructions for dismantling the MXZ-A26WV/A32WV outdoor unit.

PARTS LISTS

MXZ-A18WV Outdoor Unit Parts List

Lists structural and functional parts for the MXZ-A18WV outdoor unit.

MXZ-A26WV/A32WV Outdoor Unit Parts List

Lists structural and functional parts for MXZ-A26WV/A32WV outdoor units.

MXZ-A18WV Electrical Parts & Accessories

Lists electrical components and accessories for MXZ-A18WV.

MXZ-A26WV/A32WV Electrical Parts & Accessories

Lists electrical components and accessories for MXZ-A26WV/A32WV.

OPTIONAL PARTS

Different-Diameter Pipe Specifications

Details specifications for different-diameter pipe adapters.

Outlet Guide Accessory

Describes the function and application of the outlet guide.