Mitsubishi Electric PSA-M140KA User Manual

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

Mitsubishi Electric PSA-M140KA Specifications

General

Capacity (kW)	14.0
Cooling Capacity	14.0 kW
Heating Capacity	16.0 kW
Refrigerant	R410A
Indoor Unit Type	Ceiling Suspended
Power Supply	3 phase, 400 V, 50 Hz

Summary

SAFETY PRECAUTION

2-2. CAUTIONS RELATED TO REFRIGERANT

Essential safety guidelines for handling refrigerants like R32 and R410A.

[1] Warning for service

Critical warnings and precautions for service personnel to prevent hazards.

[4] Cautions for unit using R32 refrigerant

Specific safety measures and work procedures for units using R32 refrigerant.

SPECIFICATIONS

WIRING DIAGRAM

REFRIGERANT SYSTEM DIAGRAM

TROUBLESHOOTING

9-2. MALFUNCTION-DIAGNOSIS METHOD BY REMOTE CONTROLLER

Guide on using the remote controller to diagnose malfunctions and check error history.

9-3. SELF-DIAGNOSIS ACTION TABLE

Table detailing error codes, causes, and countermeasures for self-diagnosis.

DISASSEMBLY PROCEDURE

2. Removing the indoor controller board

4. Removing the R32 sensor

5. Removing the indoor fan and the indoor fan motor

9. Removing the indoor heat exchanger

Detailed steps for removing the indoor heat exchanger unit.

REMOTE CONTROLLER

12-1. REMOTE CONTROLLER FUNCTIONS

12-2. ERROR INFORMATION

Guide to viewing and understanding error codes displayed by the system.

12-3. SERVICE MENU