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Mitsubishi PLH-4AAK

Mitsubishi PLH-4AAK
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TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
No. OC360
NOTE:
• This manual does not
cover outdoor units.
When servicing outdoor
units, please refer to the
outdoor unit`s service
manual together with this
manual.
CONTENTS
1. REFERENCE MANUAL ······································2
2. PART NAMES AND FUNCTIONS ···················3
3. SPECIFICATIONS············································6
4. DATA ······························································14
5. OUTLINES AND DIMENSIONS ·····················28
6. WIRING DIAGRAM ········································31
7. REFRIGERANT SYSTEM DIAGRAM············32
8. TROUBLESHOOTING ···································34
9. FUNCTION SETTING·····································50
10. 4-WAY AIR FLOW SYSTEM ··························57
11. SYSTEM CONTROL ······································62
12. DISASSEMBLY PROCEDURE ······················76
13. PARTS LIST ···················································79
14. OPTIONAL PARTS ········································84
Indoor unit
[Model names] [Service Ref.]
PLH-3AAK
PLH-3AAK
PLH-4AAK
PLH-4AAK
PLH-5AAK
PLH-5AAK
PLH-6AAK
PLH-6AAK
PLH-3AAKH
PLH-3AAKH
PLH-4AAKH
PLH-4AAKH
PLH-5AAKH
PLH-5AAKH
PLH-6AAKH
PLH-6AAKH
February 2006
INDOOR UNIT
WIRED REMOTE
CONTROLLER
WIRELESS REMOTE
CONTROLLER
ON/OFF TEMP
ON/OFF
TEMP.
Model name
indication
OC360--1.qxp 06.2.24 1:56 PM Page 1

Table of Contents

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Mitsubishi PLH-4AAK Specifications

General IconGeneral
Phase1
Energy Efficiency Ratio (EER)11.5
RefrigerantR410A
SEER16
HSPF9.0

Summary

Part Names and Functions

Indoor Unit Components

Identifies and describes key parts of the indoor unit, including air intake, outlet, filters, and vanes.

Specifications

Indoor Unit Specifications

Provides detailed technical specifications for indoor units, including capacity, input, dimensions, noise, and weight.

Outdoor Unit Specifications

Lists technical data for outdoor units, covering power supply, compressor, heat exchanger, and refrigerant details.

Data

Performance Data (50 Hz)

Presents cooling capacity data for various indoor and outdoor conditions, including capacity, heat capacity, and power consumption.

Heating Capacity Data

Provides heating capacity data for various indoor and outdoor conditions, including capacity, heat capacity, and power consumption.

Wiring Diagram

Electrical Wiring and Component Legend

Illustrates wiring diagrams, component legends, and connection points for indoor and outdoor units.

Malfunction Diagnosis and Emergency Operation

Details self-diagnosis error codes, symptoms, and procedures for emergency operation in case of controller failure.

Refrigerant System Diagram

Refrigerant Flow Diagrams

Shows refrigerant flow diagrams for different model series, illustrating the path of refrigerant through key components.

Troubleshooting

General Troubleshooting Overview

Summarizes troubleshooting steps based on error code display and phenomenon recurrence, guiding service actions.

Malfunction Diagnosis by Remote Controller

Explains how to use remote controllers for malfunction diagnosis, including button sequences and interpreting error codes.

Self-Diagnosis Action Table

Details error codes, causes, and countermeasures for specific issues like thermistor abnormalities and drain system faults.

Troubleshooting Inferior Phenomena

Addresses issues related to controller board status (LEDs) and wiring faults, providing troubleshooting steps for each.

Function Setting

System Control

Disassembly Procedure

Indoor Unit Disassembly Steps

Provides a step-by-step guide for disassembling the indoor unit, including removing the intake grille, thermistors, and electrical box.

Parts List

Panel Parts

Lists and illustrates panel parts for the indoor unit, including quantities and part numbers for replacement.

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