Mitsubishi Electric Mr.Slim PCA-M125KA2 Service Manual
Mitsubishi Electric Mr.Slim PCA-M125KA2 Service Manual

Mitsubishi Electric Mr.Slim PCA-M125KA2 Service Manual

Split-type, heat pump air conditioners split-type, air conditioners ceiling suspended r32/r410a

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
SERVICE MANUAL
Indoor unit
[Model Name]
PCA-M35KA2
PCA-M50KA2
PCA-M60KA2
PCA-M71KA2
PCA-M100KA2
PCA-M125KA2
PCA-M140KA2
[Service Ref.]
PCA-M35KA2
PCA-M35KA2-ET
PCA-M50KA2
PCA-M60KA2
PCA-M71KA2
PCA-M100KA2
PCA-M125KA2
PCA-M140KA2
INDOOR UNIT
PCA-M35KA2-ET
PCA-M50KA2-ET
PCA-M60KA2-ET
PCA-M71KA2-ET
PCA-M100KA2-ET
PCA-M125KA2-ET
PCA-M140KA2-ET
PCA-M50KA2-ET
PCA-M60KA2-ET
PCA-M71KA2-ET
PCA-M100KA2-ET
PCA-M125KA2-ET
PCA-M140KA2-ET
indication
R32/R410A
PCA-M35KA2-ER
PCA-M50KA2-ER
PCA-M60KA2-ER
PCA-M71KA2-ER
PCA-M100KA2-ER
PCA-M125KA2-ER
PCA-M140KA2-ER
PCA-M35KA2-ER
PCA-M50KA2-ER
PCA-M60KA2-ER
PCA-M71KA2-ER
PCA-M100KA2-ER
PCA-M125KA2-ER
PCA-M140KA2-ER
CONTENTS
1. REFERENCE MANUAL ···························· 2
2. SAFETY PRECAUTION ··························· 3
3. PARTS NAMES AND FUNCTIONS ·········· 8
4. SPECIFICATIONS ···································· 9
5. NOISE CRITERION CURVES ················ 12
6. OUTLINES AND DIMENSIONS ·············· 14
7. WIRING DIAGRAM ································· 18
9. TROUBLESHOOTING ···························· 20
10. FUNCTION SETTING ····························· 34
11. SPECIAL FUNCTION ····························· 34
12. DISASSEMBLY PROCEDURE ··············· 36
13. REMOTE CONTROLLER ······················· 42
PARTS CATALOG (OCB752)
September 2021
No. OCH752

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Summarization of Contents

REFERENCE MANUAL
OUTDOOR UNIT'S SERVICE MANUAL
Lists service manual numbers for various outdoor units.
SAFETY PRECAUTION
ALWAYS OBSERVE FOR SAFETY
General safety rules to follow before any work.
CAUTIONS RELATED TO NEW REFRIGERANT
Specific safety measures for R32/R410A refrigerant.
Cautions for unit using R32 refrigerant
Detailed safety guidelines specific to R32 refrigerant use.
PARTS NAMES AND FUNCTIONS
INDOOR UNIT
Identifies and illustrates indoor unit components.
WIRELESS REMOTE CONTROLLER (OPTION)
Refers to functions of the optional wireless remote controller.
WIRED REMOTE CONTROLLER (OPTION)
Refers to functions of the optional wired remote controller.
SPECIFICATIONS
SPECIFICATIONS
Lists technical specifications for various indoor unit models.
FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
Provides graphs on airflow and static pressure for fresh air intake.
TROUBLESHOOTING
TROUBLESHOOTING
General approach to troubleshoot based on self-diagnosis codes.
MALFUNCTION-DIAGNOSIS METHOD BY REMOTE CONTROLLER
How to use the remote controller for malfunction diagnosis.
SELF-DIAGNOSIS ACTION TABLE
Detailed table linking check codes to causes and actions.
TROUBLESHOOTING OF PROBLEMS
Specific problems and their countermeasures.
EMERGENCY OPERATION
When wireless remote controller fails or its battery is exhausted
Emergency operation using buttons on the grille.
When wired remote controller or indoor unit microprocessor fails
Emergency operation via indoor controller board switch.
HOW TO CHECK THE PARTS
Thermistor
How to check thermistor resistance and characteristics.
DC Fan motor (fan motor/indoor controller circuit board)
Method to check DC fan motor and related board.
FUNCTION SETTING
UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER
How to set unit functions using the remote controller.
SPECIAL FUNCTION
ROTATION FUNCTION (AND BACK-UP FUNCTION, 2ND STAGE CUT-IN FUNCTION)
Explains rotation, back-up, and 2nd stage cut-in functions.
REMOTE CONTROLLER
REMOTE CONTROLLER FUNCTIONS
Overview of remote controller interface and buttons.
ERROR INFORMATION
How to check and reset error information via the remote controller.
SERVICE MENU
Accessing and navigating the service menu with password.
TEST RUN
Performing test runs for cooling, heating, and vane checks.
FUNCTION SETTING
Setting various unit functions via the remote controller.
ROTATION SETTING
Configuring rotation and support functions for multi-unit systems.
ERROR HISTORY
Viewing and deleting error history records.
SELF-DIAGNOSIS
Performing self-diagnosis and resetting errors.
REMOTE CONTROLLER CHECK
Diagnosing the remote controller's functionality.
SMOOTH MAINTENANCE
Checking operation data for smooth maintenance.
REQUEST CODE
Confirming operation data using request codes.

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