Trane NTXMMX42A152AA - User Manual

HFC
utilized
R410A
PARTS CATALOG (OBBT702)
SERVICE MANUAL
No. OBHT702
CONTENTS
1. TECHNICAL CHANGES ··································· 4
2. PART NAMES AND FUNCTIONS ····················· 5
3. SPECIFICATION ················································ 6
4. NOISE CRITERIA CURVES ···························· 14
5. OUTLINES AND DIMENSIONS ······················ 16
6. WIRING DIAGRAM ·········································· 22
7. REFRIGERANT SYSTEM DIAGRAM ············· 28
8. DATA ································································ 41
9. ACTUATOR CONTROL ··································· 70
10. SERVICE FUNCTIONS ···································· 71
11. TROUBLESHOOTING ····································· 73
12. DISASSEMBLY INSTRUCTIONS ···················· 94
Models
NTXMMX20A122AA
NTXMMX24A132AA
NTXMMX30A132AA
NTXMMX36A142AA
NTXMMX42A152AA
NTXMPH20A122AA
NTXMPH24A132AA
NTXMPH30A132AA
NTXMMX24A132AA
NTXMMX30A132AA
NTXMMX36A142AA
OUTDOOR UNIT
Indoor unit service manual
NTXWPH·A Series (OBHT683)
NTX(Y)WST·A Series (OBHT732)
NTXFKS·A Series (OBHT752)
NTXCKS·A Series (OCHT669)
PLA-A·EA Series (OCH640)
NTXDKS·A Series
PEAD-A·AA Series
PCA-A·KA Series (OCH455)
NTXAMT·A Series

Trane NTXMMX42A152AA Specifications

General

Brand	Trane
Model	NTXMMX42A152AA
Category	Air Conditioner
Language	English

Summary

Outdoor Unit Service Manual Overview

Models Covered

Lists the outdoor unit models included in this service manual.

Indoor Unit Compatibility Charts

Details connectable indoor unit lineups for various outdoor models.

Safety and Warnings

Specified Refrigerant Usage

Critical warning regarding the use of specified refrigerants only.

Specifications

NTXMMX20 A122 AA Specifications

Detailed technical specifications for the NTXMMX20A122AA model.

Refrigerant System Schematics

NTXMMX20 A122 AA Refrigerant Diagram

Refrigerant system diagram for the NTXMMX20A122AA outdoor unit.

NTXMMX24 A132 AA Refrigerant Diagram

Refrigerant system diagram for the NTXMMX24A132AA outdoor unit.

NTXMMX36 A142 AA Refrigerant Diagram

Refrigerant system diagram for the NTXMMX36A142AA outdoor unit.

NTXMMX42 A152 AA Refrigerant Diagram

Refrigerant system diagram for the NTXMMX42A152AA outdoor unit.

NTXMPH20 A122 AA Refrigerant Diagram

Refrigerant system diagram for the NTXMPH20A122AA outdoor unit.

NTXMPH24 A132 AA Refrigerant Diagram

Refrigerant system diagram for the NTXMPH24A132AA outdoor unit.

Pumping Down Procedure

Key Service Functions

Pre-Heat Control

Explanation and procedure for managing the compressor pre-heat control.

Auto Line Correcting Procedure

Troubleshooting General Guidance

Cautions on Troubleshooting

Important safety and procedural notes before starting troubleshooting.

Failure Mode Recall Functionality

Troubleshooting Error Code Table

Troubleshooting Flowchart Instructions

Main Parts Trouble Criteria

Component-Specific Troubleshooting Flows

Miswiring and Serial Signal Error Checks

Inverter and Compressor Troubleshooting

Outdoor Thermistor Resistance Checks

Outdoor Fan Motor Performance Checks

HPS and Bus-bar Voltage Checks

Unit Disassembly Procedures

Removing the Cabinet and Panels

Step-by-step guide to removing the unit's cabinet and panels.

Removing Expansion Valve

Procedure for removing the unit's expansion valve.

Disassembly for Specific Models (42 A;MPH20 A;24 A;30 A)

Removing PCBs, Reactor, and Heatsink

Procedure for removing PCBs, reactor, and heatsink for specific models.

Removing Fan Motor

Instructions for removing the fan motor on specific models.

Removing Compressor and 4-Way Valve

Steps for removing compressor and 4-way valve on specific models.