Mitsubishi Electric PLFY-P12NFMU-E User Manual

Indoor unit
[Model Name] [Service Ref.]
PLFY-P05NFMU-E.TH
PLFY-P08NFMU-E.TH
PLFY-P12NFMU-E.TH
PLFY-P15NFMU-E.TH
PLFY-P18NFMU-E.TH
PLFY-P05NFMU-E
PLFY-P08NFMU-E
PLFY-P12NFMU-E
PLFY-P15NFMU-E
PLFY-P18NFMU-E
R410A
TECHNICAL & SERVICE MANUAL
March 2018
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CONTENTS
1. SAFETY PRECAUTION
..........................
2
2. PARTS NAMES AND FUNCTIONS
........
4
3. SPECIFICATIONS
.................................
12
4. 4-WAY AIR FLOW SYSTEM
.................
14
5. OUTLINES AND DIMENSIONS
............
16
6. WIRING DIAGRAM
...............................
17
7.
REFRIGERANT SYSTEM DIAGRAM
......
18
8. TROUBLESHOOTING
..........................
19
9. DISASSEMBLY PROCEDURE
.............
27
PARTS CATALOG (OCB604)

Mitsubishi Electric PLFY-P12NFMU-E Specifications

General

Brand	Mitsubishi Electric
Model	PLFY-P12NFMU-E
Category	Air Conditioner
Language	English

Summary

SAFETY PRECAUTION

Cautions for R410A Refrigerant Units

Safety guidelines for handling R410A refrigerant and associated tools.

Service Cautions and Procedures

Important cautions and procedures to follow during service operations.

PARTS NAMES AND FUNCTIONS

Wired Remote Controller (PAR-32MAA) Overview

Overview of the PAR-32MAA wired remote controller and its functions.

PAR-32MAA Remote Controller Functions

Detailed explanation of the functions and buttons of the PAR-32MAA remote controller.

Wired Remote Controller (PAC-YT53CRAU) Overview

SPECIFICATIONS

Unit Specifications

Technical specifications for the indoor unit models.

Electrical Parts Specifications

WIRING DIAGRAM

REFRIGERANT SYSTEM DIAGRAM

TROUBLESHOOTING

Error Countermeasures during Test Run

Troubleshooting steps and error codes for system abnormalities.

Component Checking Procedures

Methods for checking the functionality of various parts.

Thermistor Characteristic Graph

Graphs showing thermistor resistance versus temperature.

Linear Expansion Valve Operation and Troubleshooting

Details on LEV operation, pulse signals, and troubleshooting common issues.

DC Fan Motor Troubleshooting

Procedure for checking the DC fan motor and indoor controller board.

Function of Dip Switches

Test Point Diagram

DISASSEMBLY PROCEDURE

Removing Electrical Parts

Removing Fan Motor

Removing the Heat Exchanger