Mitsubishi Electric PLA-M50EA2-ER User Manual

SERVICE MANUAL
INDOOR UNIT
PARTS CATALOG (OCB783)
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
Model name
indication for
MAIN UNIT
Model name
indication for GRILLE
Indoor unit
[Model Name] [Service Ref.]
Grille model
[Model Name] [Service Ref.]
PLP-6EA
PLP-6EAE
PLP-6EAL
PLP-6EALE
PLP-6EAJ
PLP-6EAJE
PLP-6EALM2
PLP-6EALME2
PLP-6EAB
PLP-6EA PLP-6EAR1
PLP-6EAE PLP-6EAER1
PLP-6EAL PLP-6EALR1
PLP-6EALE PLP-6EALER1
PLP-6EAJ
PLP-6EAJE
PLP-6EALM2
PLP-6EALME2
PLP-6EAB
R32/R410A
No. OCH783
REVISED EDITION-B
July 2023
CONTENTS
1. REFERENCE MANUAL ·······················2
2. SAFETY PRECAUTION ·······················2
3. PARTS NAMES AND FUNCTIONS ········8
4. SPECIFICATIONS ······························ 9
5. NOISE CRITERION CURVES ············· 12
6. OUTLINES AND DIMENSIONS ··········· 14
7. WIRING DIAGRAM ··························· 15
8. REFRIGERANT SYSTEM DIAGRAM ··· 16
9. TROUBLESHOOTING ······················· 17
10. FUNCTION SETTING ························ 32
11. SPECIAL FUNCTION ························ 33
12. DISASSEMBLY PROCEDURE ············ 37
13. REMOTE CONTROLLER ··················· 44
PLA-M35EA2
PLA-M35EA2-ER
PLA-M35EA2-ET
PLA-M50EA2
PLA-M50EA2-ER
PLA-M50EA2-ET
PLA-M60EA2
PLA-M60EA2-ER
PLA-M60EA2-ET
PLA-M71EA2
PLA-M71EA2-ER
PLA-M71EA2-ET
PLA-M100EA2
PLA-M100EA2-ER
PLA-M100EA2-ET
PLA-M125EA2
PLA-M125EA2-ER
PLA-M125EA2-ET
PLA-M140EA2
PLA-M140EA2-ER
PLA-M140EA2-ET
PLA-M35EA2.UK
PLA-M35EA2-ER.UK
PLA-M35EA2-ET.UK
PLA-M50EA2.UK
PLA-M50EA2-ER.UK
PLA-M50EA2-ET.UK
PLA-M60EA2.UK
PLA-M60EA2-ER.UK
PLA-M60EA2-ET.UK
PLA-M71EA2.UK
PLA-M71EA2-ER.UK
PLA-M71EA2-ET.UK
PLA-M100EA2.UK
PLA-M100EA2-ER.UK
PLA-M100EA2-ET.UK
PLA-M125EA2.UK
PLA-M125EA2-ER.UK
PLA-M125EA2-ET.UK
PLA-M140EA2.UK
PLA-M140EA2-ER.UK
PLA-M140EA2-ET.UK
Revision:
• PLP-6EAB has been added in
REVISED EDITION-B.
OCH783A is void.

Mitsubishi Electric PLA-M50EA2-ER Specifications

General

Brand	Mitsubishi Electric
Model	PLA-M50EA2-ER
Category	Air Conditioner
Language	English

Summary

SERVICE MANUAL

Series PLA Ceiling Cassettes R32/R410A

Identifies the product series and refrigerant compatibility.

2 SAFETY PRECAUTION

General Safety Observances

Essential safety rules for handling air conditioning units and refrigerants.

Refrigerant Handling Preparation

Guidelines for preparing repair work, including tools and pipe usage.

Refrigerant Repair Precautions

Safety measures during repair, vacuum pump use, and tool requirements.

[1] Warning for service

General Service Warnings

Important warnings and restrictions for performing service on the unit.

Service Procedures and Refrigerant Handling

Cautions for service execution, refrigerant recovery, and filter drier usage.

[4] Cautions for unit using R32 refrigerant

R32 Refrigerant Safety Checks

Safety measures for working with R32 refrigerant: area checks and ventilation.

Equipment and Component Checks

Guidelines for checking refrigeration equipment and electrical components.

[4] Cautions for unit using R32 refrigerant

Safe Component Repair and Refrigerant Handling

Procedures for intrinsically safe components, cabling, leak detection, and refrigerant removal.

Refrigerant Recovery and Labelling

Details on safe refrigerant recovery, cylinder handling, and equipment labelling.

Refrigerant Evacuation and Charging

Best practices for evacuating and charging refrigerant systems safely.

4 SPECIFICATIONS

6 OUTLINES AND DIMENSIONS

Indoor Unit Installation Dimensions

Diagrams and dimensions for indoor unit installation, including clearances.

7 WIRING DIAGRAM

Indoor Unit Wiring Diagram

Schematic showing internal wiring of the indoor unit with a legend.

8 REFRIGERANT SYSTEM DIAGRAM

9 TROUBLESHOOTING

Troubleshooting Overview

General approach to troubleshooting and handling recurring problems.

Indoor Unit Self-Diagnosis Codes

Table of error codes detected by the indoor unit and their symptoms.

Other Unit Self-Diagnosis Codes

Table of error codes detected by units other than the indoor unit.

9-3. SELF-DIAGNOSIS ACTION TABLE

Troubleshooting Codes P1, P2, P4, P5

Troubleshooting steps and countermeasures for specific self-diagnosis error codes.

Troubleshooting Codes P5, P6, P8

Troubleshooting steps and countermeasures for P5, P6, and P8 error codes.

Troubleshooting Codes P9, E0, E3, E4, E5

Troubleshooting steps for remote controller transmission and signal receiving errors.

Troubleshooting Codes E6, E7, Fb, E1, E2, PA

Troubleshooting steps for communication, memory, and compressor errors.

Troubleshooting Codes Pb, PL

Troubleshooting steps for fan motor and refrigerant circuit issues.

9-4. TROUBLESHOOTING OF PROBLEMS

Troubleshooting LED2 Status

9-4. TROUBLESHOOTING OF PROBLEMS

9-5. EMERGENCY OPERATION

Emergency Operation Without Remote Controller

Emergency Operation with Wired Remote Controller Failure

9-6-2. DC Fan motor (fan motor/indoor controller board)

9-7. TEST POINT DIAGRAM

Indoor Controller Board Test Points

Diagram of the indoor controller board showing test points for voltage and signal checks.

9-8. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE

DIP Switch and Jumper Wire Settings

10 FUNCTION SETTING

11-2. ELECTRICAL CIRCUIT (Controller board and wiring diagram (Panel))

12 DISASSEMBLY PROCEDURE

13 REMOTE CONTROLLER

13-2. ERROR INFORMATION

Viewing and Resetting Error Information

Procedure for checking error details and resetting active errors via the remote controller.

13-3. SERVICE MENU

Accessing Service Menu and Password Management

Steps to enter the service menu and manage the maintenance password.

13-4. TEST RUN

PAR-41MAA Test Run Procedure

PAR-SL97A-E Test Run Procedure

PAR-SL101A-E Test Run Procedure

13-5. FUNCTION SETTING

13-7. ERROR HISTORY

Viewing and Deleting Error History

13-8. SELF-DIAGNOSIS

PAR-41MAA Self-Diagnosis

Guide to performing self-diagnosis and resetting error history for the PAR-41MAA.

PAR-SL97A-E Malfunction Diagnosis

Method for diagnosing malfunctions using the CHECK button and temperature settings on PAR-SL97A-E.

PAR-SL101A-E Malfunction Diagnosis

Procedure for performing malfunction diagnosis using MENU and other buttons on PAR-SL101A-E.

13-9. REMOTE CONTROLLER CHECK

Diagnosing Remote Controller Functionality