Mitsubishi Electric TRANE NTXWST24A112AA User Manual

CONTENTS
1. TECHNICAL CHANGES
·······································
2
2. PART NAMES AND FUNCTIONS ····················· 3
3. SPECIFICATION ················································ 6
4. OUTLINES AND DIMENSIONS ························ 8
5. WIRING DIAGRAM ·········································· 10
6. REFRIGERANT SYSTEM DIAGRAM ············· 12
7. SERVICE FUNCTIONS ··································· 13
8. MICROPROCESSOR CONTROL ··················· 15
9. TROUBLESHOOTING ····································· 23
10. DISASSEMBLY INSTRUCTIONS ···················· 41
Outdoor unit service manual
NTXSST•A112AA, NTYSST•A112AA Series (OBHT733)
NTXMMX•A•AA, NTXMPH•A•AA Series (OCHT573)
PARTS CATALOG (OBBT732)
NTXWST18A112AA
NTYWST18A112AA
INDOOR UNIT
SERVICE MANUAL
INDOOR UNIT
Models
NTXWST06A112AA
NTXWST09A112AA NTYWST09A112AA
NTXWST12A112AA NTYWST12A112AA
NTXWST15A112AA NTYWST15A112AA
NTXWST18A112AA NTYWST18A112AA
NTXWST24A112AA NTYWST24A112AA
No. OBHT732

Mitsubishi Electric TRANE NTXWST24A112AA Specifications

General

Brand	Mitsubishi Electric
Model	TRANE NTXWST24A112AA
Category	Air Conditioner
Language	English

Summary

Specification Details

Wiring Diagrams

Refrigerant System Diagrams

Service Functions

Auto Restart Function Control

Microprocessor Control

Wireless Remote Controller Operation

Details the functions and buttons of the wireless remote controller.

Auto Mode Operation (NTXWST)

Auto Vane Operation

Timer Operation Procedures

Covers setting current time, ON/OFF timers, and releasing timers.

Smart Set Operation Procedures

Emergency and Test Operation

Explains how to use the emergency operation switch for testing and service.

Troubleshooting Guide

Troubleshooting Cautions and Preliminaries

Provides essential precautions and safety checks before troubleshooting.

Failure Mode Recall Function Guide

Explains how to recall memorized abnormal conditions.

Indoor Unit Troubleshooting Flowchart

A step-by-step guide to diagnose and resolve common indoor unit issues.

Troubleshooting Check Table

Lists specific symptoms, conditions, and remedies for indoor unit failures.

Main Parts Troubleshooting Criteria

Indoor Fan Motor Error Diagnosis

Flowchart for diagnosing indoor fan motor operation errors.

Remote Controller and PC Board Diagnostics

Guides on checking remote controller functionality and indoor electronic PC boards.

Indoor PC Board and Fan Motor Checks

Procedures for checking indoor PC boards and fan motors for faults.

Miswiring and Serial Signal Error Diagnostics

Steps to identify and resolve miswiring and serial signal communication errors.

Test Point Diagrams and Voltage References

Disassembly Instructions

Indoor Fan Motor, Coil Thermistor, and Line Flow Fan Removal