Mitsubishi Electric Trane NTXWPH15B112AA User Manual

INDOOR UNIT
SERVICE MANUAL
INDOOR UNIT
No. OBHT872
PARTS CATALOG (OBBT872)
Outdoor unit service manual
NTXSPB/SPH∙B112AA Series (OBHT873)
NTXMMX/MPH∙A122AA Series (OBHT702)
CONTENTS
1. TECHNICAL CHANGES ······························3
2. PART NAMES AND FUNCTIONS ··················4
3. SPECIFICATION ·········································5
4. OUTLINES AND DIMENSIONS ·····················6
5. WIRING DIAGRAM ·····································7
6. REFRIGERANT SYSTEM DIAGRAM ·············8
7. SERVICE FUNCTIONS ································9
8. MICROPROCESSOR CONTROL ················· 11
9. TROUBLESHOOTING ······························· 20
10. DISASSEMBLY INSTRUCTIONS ·················33
Models
NTXWPH06B112AA
NTXWPH09B112AA
NTXWPH12B112AA
NTXWPH15B112AA
NTXWPH18B112AA

Mitsubishi Electric Trane NTXWPH15B112AA Specifications

General

Brand	Mitsubishi Electric
Model	Trane NTXWPH15B112AA
Category	Air Conditioner
Language	English

Summary

Wiring Diagram

Refrigerant System Diagram

Service Functions

Exclusive Remote Controller Setup

Assigning a remote controller to a specific indoor unit for individual operation.

Auto Restart Function

Automatic restart of the unit in the same mode after power interruption.

Microprocessor Control Features

Emergency and Test Operations

Performing emergency or test run operations for servicing or during remote failure.

Troubleshooting Guide

Troubleshooting Cautions

Important safety and procedural guidelines before performing troubleshooting.

Failure Mode Recall Function

Recalling and identifying past abnormal conditions and failures.

Troubleshooting Check Table

Table listing indicator patterns, symptoms, conditions, and remedies.

Remote Controller and PC Board Checks

Indoor PC Board and Fan Motor Checks

Miswiring and Serial Signal Error Checks

Test Point Diagram and Voltage Reference

Disassembly Instructions

Fixing the Indoor Coil Thermistor