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Mitsubishi Electric PSA Series User Manual

Mitsubishi Electric PSA Series
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SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
[Service Ref.]
PSA-M71KA
PSA-M100KA
PSA-M125KA
PSA-M140KA
PSA-M71KA-ER
PSA-M100KA-ER
PSA-M125KA-ER
PSA-M140KA-ER
PSA-M71KA-ET
PSA-M100KA-ET
PSA-M125KA-ET
PSA-M140KA-ET
September 2021
R32/R410A
Notes:
This manual describes only
service data of the indoor
units.
PARTS CATALOG (OCB724)
Model name
indication
No. OCH724
CONTENTS
1. REFERENCE MANUAL ·······················2
2. SAFETY PRECAUTION ·······················2
3. PARTS NAMES AND FUNCTIONS ········9
4. SPECIFICATIONS ···························· 10
5. NOISE CRITERION CURVES ············· 12
6. OUTLINES AND DIMENSIONS ··········· 13
7. WIRING DIAGRAM ··························· 14
8. REFRIGERANT SYSTEM DIAGRAM ··· 15
9. TROUBLESHOOTING ······················· 16
10. SPECIAL FUNCTION ························ 27
11. DISASSEMBLY PROCEDURE ············ 29
12. REMOTE CONTROLLER ··················· 34
Indoor unit
[Model Name]
PSA-M71KA
PSA-M100KA
PSA-M125KA
PSA-M140KA
PSA-M71KA-ER
PSA-M100KA-ER
PSA-M125KA-ER
PSA-M140KA-ER
PSA-M71KA-ET
PSA-M100KA-ET
PSA-M125KA-ET
PSA-M140KA-ET
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Mitsubishi Electric PSA Series Specifications

General IconGeneral
BrandMitsubishi Electric
ModelPSA Series
CategoryAir Conditioner
LanguageEnglish

Summary

REFERENCE MANUAL

Outdoor Unit Service Manual Cross-Reference

Lists service manuals for various outdoor units, referencing model names and service manual numbers.

SAFETY PRECAUTION

Unit Safety Symbols and General Warnings

Explains symbols on the unit and provides general safety advice for handling.

Refrigerant Handling and Safety Guidelines

Details precautions for working with refrigerants, including R32/R410A.

Service and Installation Safety Protocols

Outlines warnings and cautions for service personnel during installation and maintenance.

PARTS NAMES AND FUNCTIONS

Indoor Unit Components Identification

Identifies and labels key parts of the indoor unit, including louvers and filters.

Wired Remote Controller Overview

Refers to the functions of the optional wired remote controller.

SPECIFICATIONS

NOISE CRITERION CURVES

OUTLINES AND DIMENSIONS

WIRING DIAGRAM

REFRIGERANT SYSTEM DIAGRAM

TROUBLESHOOTING

Self-Diagnosis and Error Code Interpretation

Explains how to interpret self-diagnosis check codes and error indicators.

Troubleshooting Inferior Phenomena

Provides guidance for diagnosing issues based on specific phenomena like LED status.

Component Testing and Diagnostics

Details methods for checking specific parts like thermistors and fan motors.

DIP Switch and Jumper Wire Settings

Explains how DIP switches and jumper wires configure unit settings and capacity.

SPECIAL FUNCTION

Rotation and Backup Operation Functions

Describes the rotation and backup functions for alternate unit operation.

Setting Rotation and Backup Functions

Provides instructions on how to set rotation and backup functions via the remote controller.

DISASSEMBLY PROCEDURE

Indoor Unit Component Removal Guide

Step-by-step instructions for removing parts like the intake grille and controller board.

Heat Exchanger and Drain Pan Removal

Procedures for removing the indoor heat exchanger and drain pan.

REMOTE CONTROLLER

Remote Controller Operations and Settings

Covers interface, basic functions, settings, test runs, and maintenance procedures.

Error Management and Diagnostics

Details error information, history, self-diagnosis, controller checks, and request codes.

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