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Mitsubishi Electric PAC-AKA31BC - User Manual

Mitsubishi Electric PAC-AKA31BC
88 pages
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TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGE
....................................
2
2. SAFETY PRECAUTION
....................................
2
3. OVERVIEW OF UNITS
......................................
5
4. SPECIFICATIONS
.............................................
9
5. DATA
................................................................
11
6. OUTLINES AND DIMENSIONS
......................
34
7. WIRING DIAGRAM
.........................................
36
8.
NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION
....
38
9. TROUBLESHOOTING
....................................
39
10.
PRECAUTIONS AGAINST REFRIGERANT LEAKAGE
.....
79
11. DISASSEMBLY PROCEDURE
.......................
81
OUTDOOR UNIT
BRANCH BOX
No. OCH468
REVISED EDITION-C
[Service Ref.]
MXZ-8B48NA
MXZ-8B48NAR1
PAC-AKA51BC
PAC-AKA31BC
Model name
indication
HFC
utilized
R410A
November 2010
NOTE:
• This service manual
describes technical data of
outdoor unit and branch box.
As for indoor units, refer to
its service manual.
• RoHS compliant products
have <G> mark on the spec
name plate.
[Model name]
<Outdoor unit>
MXZ-8B48NA
<Branch box>
PAC-AKA51BC
PAC-AKA31BC
(Indispensable optional parts
for MXZ-8B48NA)
PARTS CATALOG (OCB468)
• Please void OCH468
REVISED EDITION-B.
Revision:
• Switch setting on page 68
has been modified in
REVISED EDITION-C.
• Some descriptions have
been modified.

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Summary

Technical Changes

Model and Thermistor Changes

Details changes in model designation and thermistor type.

Safety Precautions

General Safety Observations

Essential safety rules to follow before accessing electrical components.

Refrigerant Handling Cautions

Critical safety measures for working with R410A refrigerant.

Service Cautions and Tool Requirements

Instructions for safe service, refrigerant charging, and necessary tools.

Refrigerant Piping Work Safety

Guidelines for safe and proper installation of refrigerant piping.

Unit Overview

System Construction

Describes the basic configuration and components of the HVAC system.

System Outline and Identification

General description of the system and model identification methods.

Combination Examples

Illustrates common ways indoor and outdoor units can be configured.

Simplified Piping System

Shows various piping connection methods for system installation.

Specifications

Outdoor Unit Specifications

Technical data and performance metrics for the outdoor unit.

Branch Box Specifications

Details on the connectivity and electrical specifications of branch boxes.

System Data

Cooling Capacity and Characteristics

Tables detailing cooling performance under various conditions.

Heating Capacity and Characteristics

Tables outlining heating performance under various conditions.

Capacity Correction Factors

Graphs for adjusting cooling/heating capacity based on air conditions.

Noise Criterion Curves

Sound level measurements across different frequency bands.

Outlines and Dimensions

Outdoor Unit Dimensions and Space

Physical dimensions, service space, and mounting details for the outdoor unit.

Branch Box Dimensions and Connections

Physical dimensions and connection details for branch boxes.

Wiring Diagrams

Outdoor Unit Wiring Diagram

Electrical schematic for the outdoor unit and its components.

Branch Box Wiring Diagram

Electrical connections for the branch box and indoor units.

Necessary Conditions for System Construction

Refrigerant System Diagram

Visual representation of the refrigerant circuit and its components.

Troubleshooting and Diagnostics

Troubleshooting Summary and Test Run

Overview of errors, diagnostic tables, and test run procedures.

Self-Diagnosis Action Table

Detailed list of error codes, causes, and solutions.

Special Functions and Part Checks

Configuration of special modes and methods for checking components.

Precautions Against Refrigerant Leakage

Refrigerant Safety and Concentration

Importance of R410A concentration limits in occupied spaces.

Confirming R410 A Concentration

Procedure to calculate and verify refrigerant levels in rooms.

Disassembly Procedure

Outdoor Unit Component Removal

Detailed instructions for dismantling the outdoor unit.

Branch Box Component Removal

Steps for removing parts from the branch box.

Mitsubishi Electric PAC-AKA31BC Specifications

General IconGeneral
BrandMitsubishi Electric
ModelPAC-AKA31BC
CategoryAir Conditioner
LanguageEnglish

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