Mitsubishi Electric CITY MULTI PFFY-P24NEMU-E User Manual

TECHNICAL & SERVICE MANUAL
Air-Conditioners For Building Application
<Indoor unit>
2014
Models
PFFY-P06NRMU-E,PFFY-P08NRMU-E
PFFY-P12NRMU-E,PFFY-P15NRMU-E
PFFY-P18NRMU-E,PFFY-P24NRMU-E
PFFY-P06NEMU-E,PFFY-P08NEMU-E
PFFY-P12NEMU-E,PFFY-P15NEMU-E
PFFY-P18NEMU-E,PFFY-P24NEMU-E
CONTENTS
SAFETY PRECAUTIONS ·························1
1. FEATURES ···········································3
2. PART NAMES AND FUNCTIONS ········4
3. SPECIFICATION ···································6
4. OUTLINES AND DIMENSIONS············8
5. WIRING DIAGRAM ·····························10
6. REFRIGERANT SYSTEM DIAGRAM ····11
7. TROUBLE SHOOTING·······················12
8. DISASSEMBLY PROCEDURE···········
17
Floor Standing Type
Series PFFY
For use with the R410A & R22
Exposed type
Concealed type

Mitsubishi Electric CITY MULTI PFFY-P24NEMU-E Specifications

General

Series	CITY MULTI
Refrigerant	R410A
Capacity (Cooling, kW)	2.4
Capacity (Heating, kW)	2.8
Power Supply	220-240V, 50Hz
Power Source	Single-phase
Indoor Unit Type	4-way cassette

Summary

Safety Precautions

Features

Part Names and Functions

Indoor Unit Components

Identifies and explains parts of the indoor unit.

Remote Controller Operation

Details the remote controller's buttons and functions.

Specification

Model Capacity and Dimensions

Lists cooling/heating capacities and physical dimensions for various models.

Electrical Component Specifications

Details the electrical parts, including transformers, fuses, and motors.

Outlines and Dimensions

NEMU-E Series Outline and Dimensions

Provides diagrams and measurements for NEMU-E series units.

NRMU-E Series Outline and Dimensions

Provides diagrams and measurements for NRMU-E series units.

Wiring Diagram

Control Box Internal Wiring

Illustrates the wiring connections inside the unit's control box.

Wiring Diagram Symbol Glossary

Explains the meaning of symbols used in the wiring diagrams.

Refrigerant System Diagram

Refrigerant Pipe Diameter Specifications

Specifies gas and liquid pipe sizes for R410A and R22 refrigerants.

Trouble Shooting

Component Testing Procedures

Methods for checking thermistors, transformers, and expansion valves.

Thermistor Data and Valve Operation

Thermistor resistance graphs and linear expansion valve operation details.

Common Fault Diagnosis

Addresses issues like valve locking and incorrect wiring connections.

Disassembly Procedure

Control Box and Thermistor Removal

Steps to remove control box and various thermistors.

Drainpan, Fan Motor, and Heat Exchanger Removal

Procedures for removing the drainpan, fan motor, and heat exchanger.

Casing Disassembly (Concealed Type)

Steps for disassembling the casing and air diffuser of concealed units.