Mitsubishi Electric PLFY-P40VCM-E - User Manual

TECHNICAL & SERVICE MANUAL
Indoor unit
[Model names] [Service Ref.]
PLFY-P20VCM-E.TH
PLFY-P20VCM-E1.TH
PLFY-P25VCM-E.TH
PLFY-P25VCM-E1.TH
PLFY-P32VCM-E.TH
PLFY-P32VCM-E1.TH
PLFY-P40VCM-E.TH
PLFY-P40VCM-E1.TH
INDOOR UNIT
CONTENTS
1. TECHNICAL CHANGES·························2
2. SAFETY PRECAUTION··························2
3. PART NAMES AND FUNCTIONS··········6
4. SPECIFICATIONS···································8
5. 4-WAY AIR FLOW SYSTEM·················10
6. OUTLINES AND DIMENSIONS············12
7. WIRING DIAGRAM·······························13
8. REFRIGERANT SYSTEM DIAGRAM ·····14
9. DISASSEMBLY PROCEDURE·············15
10. TROUBLESHOOTING··························18
11. PARTS LIST··········································25
12. RoHS PARTS LIST·······························29
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
R407C
R22
R410A
Model name
indication
No.OC314
REVISED EDITION-C
Revision :
• PLFY-P20/25/32/40VCM-
E1.TH are added in
REVISED EDITION-C.
• Some descriptions have
been modified.
PLFY-P20VCM-E
PLFY-P25VCM-E
PLFY-P32VCM-E
PLFY-P40VCM-E
• Please void OC314
REVISED EDITION-B.
July 2007
Note :
• RoHS compliant products
have <G> mark on spec
name plate.
For servicing RoHS compli-
ant products, refer to the
RoHS Parts List.
OC314C--1.qxp 07.7.19 8:42 AM Page 1

Summary

Technical & Service Manual Overview

Series PLFY Ceiling Cassettes

Identifies the product series and type.

Technical Changes and Safety Precautions

Refrigerant Safety Guidelines

Provides critical safety advice for handling new refrigerants.

Service Safety Procedures

Outlines essential safety steps for service personnel.

R410 A Refrigerant Safety and Tools

R410 A Specific Safety Precautions

Details safety measures specific to R410A refrigerant use.

R410 A Service Tool Requirements

R410 A Service Procedures

R410 A Service Cautions

Highlights important service considerations for R410A units.

Additional Refrigerant Charging

Part Names and Functions Overview

Indoor Unit Components Identification

Identifies and describes key parts of the indoor unit.

Wired Remote Controller Layout

Explains the layout and buttons of the wired remote controller.

General Specifications

Unit Technical Specifications

Provides detailed technical specifications for the units.

Wiring Diagram and Connections

Circuit Connection Details Explained

Illustrates the electrical wiring connections for the unit.

Refrigerant System Diagram

Refrigerant Circuit Components Layout

Shows the layout of the refrigerant system and its parts.

Disassembly Procedure - Initial Steps

Removing Grilles, Guards, and Panels

Removing Electrical Parts

Disassembly Procedure - Component Removal

Removing Temperature Sensors

Removing Drain Pan and Fan Motor

Disassembly Procedure - Major Components

Removing Drain Pump and Heat Exchanger

Troubleshooting: Part Checks

Checking Thermistors and Vane Motor Resistance

Methods for checking thermistors and vane motor resistance.

Checking Fan Motor and Expansion Valve

Procedures for testing fan motor and linear expansion valve.

Linear Expansion Valve Operation and Troubleshooting

Troubleshooting Common System Issues

Identifies symptoms and countermeasures for common problems.

Function of DIP Switches

Switch Settings for Unit Functions

Test Point Diagram

Indoor Controller Board Test Points

Parts List (Non-RoHS Compliant)

RoHS Parts List (Compliant)

Mitsubishi Electric PLFY-P40VCM-E Specifications