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Mitsubishi Electric Trane NTXWPH06B112AA User Manual

Mitsubishi Electric Trane NTXWPH06B112AA
38 pages
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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
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Mitsubishi Electric Trane NTXWPH06B112AA Specifications

General IconGeneral
CategoryAir Conditioner
ModelNTXWPH06B112AA
SEER Rating20.5
Phase1
HSPF Rating10.0
Operating Temperature (Cooling)5°F to 115°F

Summary

TECHNICAL CHANGES

PART NAMES AND FUNCTIONS

ACCESSORIES

Lists all included accessories with their quantities for model setup.

SPECIFICATION

OPERATING RANGE

Details the operational voltage, temperature, and humidity limits for the unit.

OUTLET AIR SPEED AND COVERAGE

Provides airflow rates, air speeds, and coverage areas for different operational modes.

OUTLINES AND DIMENSIONS

WIRING DIAGRAM

REFRIGERANT SYSTEM DIAGRAM

SERVICE FUNCTIONS

TIMER SHORT MODE

Explains how to shorten timer set times for service purposes.

REMOTE CONTROLLER EXCLUSIVE SETTING

Guides on assigning remote controllers to specific indoor units for exclusive operation.

INSTALLATION POSITION SETTING

Details how to set the remote controller based on the indoor unit's installation location.

AUTO RESTART FUNCTION

Describes the automatic restart feature after power interruption and how to disable it.

MICROPROCESSOR CONTROL

WIRELESS REMOTE CONTROLLER OVERVIEW

Explains the layout and functions of the wireless remote controller buttons.

INDOOR UNIT STATUS INDICATIONS

Describes the meaning of the indicator lamps on the indoor unit.

CORE OPERATION MODES

Details the primary modes: Cool, Dry, Fan, Heat, and Auto.

AIRFLOW DIRECTION ADJUSTMENT

Covers automatic vane operation and vertical vane control for optimal airflow.

TIMER AND SCHEDULING FUNCTIONS

Explains setting ON/OFF timers, weekly timers, and managing schedules.

INTELLIGENT SENSING AND COMFORT MODES

Details i-see control, absence detection, and natural airflow simulation.

SPECIALTY OPERATIONS AND SETTINGS

Covers INDIRECT/DIRECT, SMART SET, emergency operations, and temp unit changes.

TROUBLESHOOTING

TROUBLESHOOTING PRECAUTIONS

Lists safety and procedural guidelines before starting troubleshooting.

FAILURE MODE RECALL FUNCTION

Explains how to retrieve and interpret error codes from the unit's memory.

i-SEE SENSOR OPERATION CHECK

Provides steps to check the functionality of the i-see sensor and its indicator.

TROUBLESHOOTING INSTRUCTIONS AND FLOWS

Guides on initial unit checks, general troubleshooting procedures, and flowcharts.

TROUBLESHOOTING CHECK TABLE

A table correlating indicator patterns with potential faults and remedies.

TROUBLE CRITERION OF MAIN PARTS

Provides resistance checks and criteria for diagnosing key components.

SPECIFIC TROUBLESHOOTING FLOWS

Detailed troubleshooting steps for fan motors, controllers, and wiring issues.

REMOTE CONTROLLER AND PC BOARD CHECKS

Steps to check the remote controller and indoor electronic control P.C. board.

INDOOR PC BOARD AND FAN MOTOR CHECKS

Procedures for checking the indoor P.C. board and fan motor.

MISWIRING AND SERIAL SIGNAL ERROR CHECK

Guides on how to diagnose miswiring and serial signal communication errors.

ELECTROMAGNETIC NOISE INTERFERENCE

Addresses issues of electromagnetic noise affecting radios and TVs.

TEST POINT DIAGRAM AND VOLTAGE

Illustrates test points and voltage references on circuit boards for diagnostics.

DISASSEMBLY INSTRUCTIONS

REMOVING THE PANEL

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

REMOVING THE INDOOR ELECTRICAL BOX

Instructions for safely removing the electrical box assembly.

REMOVING CIRCUIT BOARDS

Details on removing various P.C. boards like power, control, and receiver boards.

REMOVING NOZZLE AND VANE MOTORS

Procedures for removing the air outlet nozzle and vane motor units.

REMOVING FAN MOTOR AND THERMISTORS

Steps to extract the indoor fan motor, coil thermistors, and line flow fan.

FIXING THE INDOOR COIL THERMISTOR

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