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

Summary

TECHNICAL CHANGES

MXZ-18 TV to MXZ-A18 WV Model Updates

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

MXZ-24 UV to MXZ-A26 WV Model Updates

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

MXZ-32 SV to MXZ-A32 WV Model Updates

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

R410 A REFRIGERANT INFORMATION

R410 A vs. R22 Refrigerant Properties

Compares properties of R410A refrigerant with R22.

Compressor Oil Handling for R410 A Systems

Explains oil separation and backflow in R410A compressor systems.

R410 A TOOLS AND REFRIGERANT PIPING

Dedicated Tools for R410 A 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-A18 WV Indoor;Outdoor Unit Combinations

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

MXZ-A26 WV Indoor;Outdoor Unit Combinations

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

MXZ-A32 WV Indoor;Outdoor Unit Combinations

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

INDOOR UNITS COMBINATION DETAILS

MXZ-A18 WV Combination Capacities & Data

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

MXZ-A26 WV Combination Capacities & Data

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

MXZ-A32 WV Combination Capacities & Data

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

SPECIFICATIONS

MXZ-A18 WV Outdoor Unit Specifications

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

MXZ-A26 WV & MXZ-A32 WV Outdoor Unit Specifications

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

NOISE CRITERIA CURVES

MXZ-A18 WV Noise Performance

Presents octave band sound pressure levels for MXZ-A18WV.

MXZ-A26 WV;A32 WV Noise Performance

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

OUTLINES AND DIMENSIONS

MXZ-A18 WV Outdoor Unit Dimensions & Space

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

MXZ-A26 WV Outdoor Unit Dimensions & Space

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

MXZ-A32 WV Outdoor Unit Dimensions & Space

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

WIRING DIAGRAMS

MXZ-A18 WV Outdoor Unit Wiring Diagram

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

MXZ-A26 WV Outdoor Unit Wiring Diagram

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

MXZ-A32 WV Outdoor Unit Wiring Diagram

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

REFRIGERANT SYSTEM DIAGRAMS

MXZ-A18 WV Refrigerant Flow and Piping Limits

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

MXZ-A26 WV Refrigerant Flow and Piping Limits

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

MXZ-A32 WV 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-A18 WV Outdoor Unit Disassembly Steps

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

MXZ-A26 WV;A32 WV Outdoor Unit Disassembly Steps

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

PARTS LISTS

MXZ-A18 WV Outdoor Unit Parts List

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

MXZ-A26 WV;A32 WV Outdoor Unit Parts List

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

MXZ-A18 WV Electrical Parts & Accessories

Lists electrical components and accessories for MXZ-A18WV.

MXZ-A26 WV;A32 WV 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.

Mitsubishi Electric MXZ-A32WV Specifications