IVT AY-XP12JHR-N User Manual

SERVICE MANUAL
AYXP12JHRN
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
CHAPTER 1. SPECIFICATION
[1] SPECIFICATION............................................ 1-1
[2] EXTERNAL DIMENSION............................... 1-2
[3] WIRING DIAGRAM ........................................ 1-3
[4] ELECTRICAL PARTS .................................... 1-3
CHAPTER 2. EXPLAMATION OF CIRCUIT AND OP-
ERATION
[1] BLOCK DIAGRAMS....................................... 2-1
[2] MICROCOMPUTER CONTROL SYSTEM........ 2-3
[3] FUNCTION..................................................... 2-9
CHAPTER 3. FUNCTION AND OPERATION OF PRO-
TECTIVE PROCEDURES
[1] PROTECTION DEVICE FUNCTIONS AND
OPERATIONS................................................ 3-1
[2] AIR CONDITIONER OPERATION IN
THERMISTOR ERROR ................................. 3-3
[3] THERMISTOR TEMPERATURE CHAR-
ACTERISTICS ............................................... 3-5
[4] HOW TO OPERATE THE OUTDOOR
UNIT INDEPENDENTLY................................ 3-6
[5] GENERAL TROUBLESHOOTING CHART........3-6
[6] MALFUNCTION (PARTS) CHECK METH-
OD .................................................................3-8
[7] OUTDOOR UNIT CHECK METHOD...........3-10
[8] TROUBLESHOOTING GUIDE ....................3-13
CHAPTER 4. REFRIGERATION CYCLE
[1] FLOW FOW REFRIGERANT ........................4-1
[2] STANDARD CONDITION..............................4-1
[3] TEMPERATURE AT EACH PART AND
PRESSURE IN 3-WAY VALVE ......................4-1
[4] PERFORMANCE CURVES...........................4-2
CHAPTER 5. DISASSEMBLING PROCEDURE
[1] DISASSEMBLY OF INDOOR UNIT...............5-1
[2] DISASSEMBLY OF OUTDOOR UNIT.........5-10
Parts Guide
TopPage
CONTENTS
SPLIT TYPE
ROOM AIR CONDITIONERS
OUTDOOR UNIT
AE-X12JR-N
In the interests of user-safety (Required by safety regulations in some
countries) the set should be restored to its original condition and only
parts identical to those specified should be used.
INDOOR UNIT
AY-XP12JHR-N
MODELS

IVT AY-XP12JHR-N Specifications

General

Brand	IVT
Model	AY-XP12JHR-N
Category	Air Conditioner
Language	English

Summary

SERVICE MANUAL INTRODUCTION

MODEL IDENTIFICATION AND OVERVIEW

Identifies air conditioner models and provides a brief overview.

CHAPTER 1. SPECIFICATION

UNIT SPECIFICATIONS AND DIMENSIONS

Details technical specs, external dimensions, wiring diagrams, and electrical parts.

CHAPTER 2. CIRCUIT AND OPERATION EXPLANATION

BLOCK DIAGRAMS, CONTROL SYSTEM, AND FUNCTIONS

Explains system blocks, microcomputer control, and unit operational functions.

CHAPTER 3. FUNCTION AND PROTECTIVE PROCEDURES

PROTECTION DEVICES, THERMISTOR OPERATIONS, AND UNIT FUNCTIONS

Covers protection features, thermistor errors, characteristics, and independent operation.

TROUBLESHOOTING AND UNIT CHECK METHODS

HOW TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY

Instructions for operating the outdoor unit in isolation for testing.

GENERAL TROUBLESHOOTING AND MALFUNCTION CHECKS

General charts, parts check methods, and outdoor unit inspection procedures.

TROUBLESHOOTING GUIDE AND ERROR INDICATIONS

Comprehensive guide for diagnosing and resolving unit malfunctions and errors.

CHAPTER 4. REFRIGERATION CYCLE

REFRIGERANT FLOW, CONDITIONS, AND PERFORMANCE

Details refrigerant flow, standard conditions, temperatures, pressures, and performance curves.

CHAPTER 5. DISASSEMBLING PROCEDURE

INDOOR AND OUTDOOR UNIT DISASSEMBLY STEPS

Step-by-step guides for disassembling both the indoor and outdoor units.

PARTS GUIDE

INDOOR UNIT PARTS AND MECHANISMS

Lists indoor unit components, panel mechanisms, and accessories with diagrams.

OUTDOOR UNIT PARTS AND PACKAGING

Lists outdoor unit components, other parts, and packaging materials.