Trane NTXMMX20A122AA - 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 NTXMMX20A122AA Specifications

General

Brand	Trane
Model	NTXMMX20A122AA
Category	Air Conditioner
Language	English

Summary

2 PART NAMES AND FUNCTIONS

3 SPECIFICATION

5 OUTLINES AND DIMENSIONS

6 WIRING DIAGRAM

7 REFRIGERANT SYSTEM DIAGRAM

PUMPING DOWN

10 SERVICE FUNCTIONS

10-1. PRE-HEAT CONTROL

Controls compressor heating to prevent moisture issues during startup.

10-2. AUTO LINE CORRECTING

Automatically detects and corrects improper wiring or piping.

11 TROUBLESHOOTING

11-1. CAUTIONS ON TROUBLESHOOTING

Important safety and handling precautions before performing troubleshooting.

11-2. FAILURE MODE RECALL FUNCTION

Function to memorize and recall abnormal conditions for diagnosis.

11-4. TROUBLESHOOTING CHECK TABLE

Table of symptoms, LED indications, conditions, and remedies for troubleshooting.

11-3. INSTRUCTION OF TROUBLESHOOTING

General procedure for diagnosing and resolving outdoor unit issues.

How to check miswiring and serial signal error (when outdoor unit does not work)

Procedure to diagnose miswiring and serial signal errors in the outdoor unit.

Check of R.V. coil

Check of LEV

How to check inverter;compressor

Steps to diagnose issues with the inverter and compressor.

Check of outdoor thermistors

Check of outdoor fan motor

11-7. TEST POINT DIAGRAM AND VOLTAGE

12 DISASSEMBLY INSTRUCTIONS

12-1. NTXMMX20 A122 AA

12-2. NTXMMX24 A132 AA NTXMMX30 A132 AA NTXMMX36 A142 AA

12-3. NTXMMX42 A152 AA NTXMPH20 A122 AA NTXMPH24 A132 AA NTXMPH30 A132 AA

Removing the outdoor control P.C. board, the reactor and the outdoor power P.C. board

Removing the compressor and 4-way valve