Mitsubishi Electric PLFY-P18NFMU-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-P18NFMU-E Specifications

General

Brand	Mitsubishi Electric
Model	PLFY-P18NFMU-E
Category	Air Conditioner
Language	English

Summary

SAFETY PRECAUTIONS

Refrigerant Handling Cautions

Cautions for new refrigerant (R410A), piping, oil, charging, and handling.

Service Cautions and Tools

Details on service cautions, refrigerant charging, and necessary tools for R410A systems.

PARTS NAMES AND FUNCTIONS

Wired Remote Controller PAR-32MAA Operation

Wired Remote Controller PAC-YT53CRAU Operation

SPECIFICATIONS

WIRING DIAGRAM

Indoor Unit Wiring Connections

Illustrates wiring diagrams and legends for indoor controller boards, remote controls, and components.

REFRIGERANT SYSTEM DIAGRAM

Refrigerant Circuit Components

TROUBLESHOOTING

Error Code Countermeasures

Lists error codes, their troubles, and countermeasures for test run abnormalities.

Part Checking Procedures

Describes how to check parts like thermistors, vane motors, LEV, and i-see sensor using a tester.

Thermistor and Expansion Valve Details

Linear Expansion Valve Troubleshooting

Details troubleshooting for linear expansion valve operation, motor issues, and connections.

DC Fan Motor Troubleshooting

Outlines checks for DC fan motor and indoor controller board issues, including fuses and wiring.

Dip Switch Functions

Indoor Controller Board Test Points

Illustrates test points on the indoor controller board for voltage checks and component identification.