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Mitsubishi City Multi Series PLFY-P15NCMU-E User Manual

Mitsubishi City Multi Series PLFY-P15NCMU-E
34 pages
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
INDOOR UNIT
CONTENTS
1. TECHNICAL CHANGES
...........................................
2
2. FEATURES
................................................................
3
3. PART NAMES AND FUNCTIONS
.............................
4
4. SPECIFICATIONS
.....................................................
6
5. 4-WAY AIR FLOW SYSTEM
......................................
9
6. OUTLINES AND DIMENSIONS
...............................
11
7. WIRING DIAGRAM
..................................................
12
8.
REFRIGERANT SYSTEM DIAGRAM
........................
15
9. MICROPROCESSOR CONTROL
...........................
16
10. TROUBLESHOOTING
.............................................
23
11. DISASSEMBLY PROCEDURE
................................
30
R410A / R22
No. OCH410
REVISED EDITION-D
April 2012
NOTE:
• This manual describes only
service data of the indoor units.
PARTS CATALOG (OCB410)
Revision:
• PLFY-P08/12/15NCMU-ER4.TH
have been added in
REVISED EDITION-D.
• Some descriptions have been
modified.
• Please void OCH410
REVISED EDITION-C.
Model name
indication
[Service Ref.]
PLFY-P08NCMU-E.TH
PLFY-P08NCMU-E1.TH
PLFY-P08NCMU-ER2.TH
PLFY-P08NCMU-ER3.TH
PLFY-P08NCMU-ER4.TH
PLFY-P12NCMU-E.TH
PLFY-P12NCMU-E
1.TH
PLFY-P12NCMU-ER2.TH
PLFY-P12NCMU-ER3.TH
PLFY-P12NCMU-ER4.TH
PLFY-P15NCMU-E.TH
PLFY-P15NCMU-E
1.TH
PLFY-P15NCMU-ER2.TH
PLFY-P15NCMU-ER3.TH
PLFY-P15NCMU-ER4.TH
Indoor unit
[Model names]
PLFY-P08NCMU-E
PLFY-P12NCMU-E
PLFY-P15NCMU-E

Questions and Answers:

Mitsubishi City Multi Series PLFY-P15NCMU-E Specifications

General IconGeneral
BrandMitsubishi
ModelCity Multi Series PLFY-P15NCMU-E
CategoryAir Conditioner
LanguageEnglish

Summary

1 TECHNICAL CHANGES

2 FEATURES

Perfect Panel Size

Details the slim design and dimensions of indoor units for aesthetic and installation benefits.

Whisper-Quiet Operation

Highlights the low noise level, enhancing occupant comfort in various environments.

Long Life Filter

Features a 2,500-hour filter lifespan, reducing maintenance frequency and effort.

Fresh Air Intake Capability

Discusses the unit's ability to supply fresh indoor air, contributing to better air quality.

Smudge-Free Airflow

Describes airflow patterns designed to minimize drafts and prevent ceiling smudging.

Slim Unit Body for Easy Installation

Explains how the compact and octagonal body facilitates simpler installation and maintenance.

3 PART NAMES AND FUNCTIONS

Indoor Unit Components

Identifies and explains the functions of the main parts of the indoor unit.

Wired Remote Controller Overview

Describes the layout and basic functions of the wired remote controller.

Wired Remote Controller Display Section

Details the various indicators and displays on the wired remote controller screen.

4 SPECIFICATIONS

General Unit Specifications

Provides detailed technical specifications including capacity, power, and dimensions for various models.

Noise Criterion Curves

Presents sound pressure level data across frequency bands for different fan speed settings.

Electrical Parts Specifications

Lists the specifications for key electrical components used within the unit.

5 4-WAY AIR FLOW SYSTEM

Fresh Air Intake Installation

Details the location and procedure for installing the fresh air intake duct.

Fresh Air Intake Characteristics

Illustrates the relationship between fresh air volume and static pressure requirements.

Duct Fan (Booster Fan) Operation

Explains how to connect and operate the indoor unit with an external duct fan.

Fixing Horizontal Vane Position

Provides instructions on how to set and fix the horizontal vanes for desired airflow direction.

6 OUTLINES AND DIMENSIONS

7 WIRING DIAGRAM

8 REFRIGERANT SYSTEM DIAGRAM

9 MICROPROCESSOR CONTROL

9-1 COOL OPERATION

Details the control functions and operation sequence during the COOL mode.

Fan Control in Cool Mode

Explains how fan speed is controlled remotely during cool operation.

Drain Pump Operation

Describes the control logic and functions of the drain pump and its sensor.

Vane Position Control

Outlines the initial settings, positions, and restrictions for vane movement.

9-2 DRY OPERATION

Explains the control logic and parameters for the DRY operation mode.

Thermostat Function in Dry Mode

Details thermostat control logic and conditions for dry mode operation.

Fan Control in Dry Mode

Describes how the indoor fan operates based on compressor conditions in dry mode.

9-3 FAN OPERATION

Details the control logic for the FAN operation mode, including drain pump and vane behavior.

Drain Pump Control in Fan Mode

Explains the drain pump operation conditions when the unit is in FAN mode.

Vane Control in Fan Mode

Describes vane control behavior during FAN operation, with no downward blow restriction.

9-4 HEAT OPERATION

Explains the control logic and functions for the HEAT operation mode.

Thermostat Function in Heat Mode

Details thermostat control, including hot adjust and residual heat exclusion.

Fan Control in Heat Mode

Outlines fan control priorities and modes during heat operation.

9-5 AUTO OPERATION

Describes the automatic mode switching logic based on room temperature.

9-6 STOPPED UNIT CONTROL MODE

Details the unit's behavior, particularly drain pump operation, when stopped.

10 TROUBLESHOOTING

How to Check Parts

Provides methods and check points for testing key components like thermistors and motors.

Linear Expansion Valve Troubleshooting

Covers troubleshooting steps for linear expansion valve issues, including pulse signals and coil resistance.

Function of DIP Switches

Explains the configuration and function of various DIP switches on the control board.

Test Point Diagram

Shows electrical test points on the indoor power board for diagnostic purposes.

11 DISASSEMBLY PROCEDURE

Removing Air Intake Grille

Step-by-step guide to safely remove the air intake grille.

Removing Fan Guard

Instructions for detaching and removing the fan guard.

Removing Unit Panel

Procedure for removing the main front panel of the indoor unit.

Removing Electrical Parts

Details the removal of electrical components like boards, motors, and fuses.

Removing Temperature Sensors

Guide to removing room and pipe temperature sensors (TH21, TH22, TH23).

Removing Drain Pan

Steps for detaching and removing the unit's drain pan.

Removing Fan Motor

Procedure for safely removing the fan motor assembly.

Removing Drain Pump and Sensor

Instructions for detaching the drain pump and its associated sensor.

Removing Heat Exchanger

Procedure for safely removing the heat exchanger assembly.

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