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Mitsubishi Electric PUY-A18NHA4 User Manual

Mitsubishi Electric PUY-A18NHA4
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SERVICE MANUAL
CONTENTS
1. REFERENCE MANUAL ································· 2
2. SAFETY PRECAUTION ································· 3
3. FEATURES ····················································· 6
4. SPECIFICATIONS ·········································· 7
5. DATA ······························································· 9
6. OUTLINES AND DIMENSIONS ··················· 13
7. WIRING DIAGRAM ······································ 16
8. WIRING SPECIFICATIONS ·························· 20
9.
REFRIGERANT SYSTEM DIAGRAM
············· 25
10. TROUBLESHOOTING ·································· 28
11. EASY MAINTENANCE FUNCTION·············· 85
12. FUNCTION SETTING ··································· 88
13.
MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER
·····96
14. DISASSEMBLY PROCEDURE ··················· 106
No.OCH481
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
R410A
November 2010
[Model names]
PUZ-A18NHA4
PUZ-A24NHA4
PUZ-A30NHA4
PUZ-A36NHA4
PUZ-A42NHA4
PUZ-A18NHA4-BS
PUZ-A24NHA4-BS
PUZ-A30NHA4-BS
PUZ-A36NHA4-BS
PUZ-A42NHA4-BS
PUY-A12NHA4
PUY-A18NHA4
PUY-A24NHA4
PUY-A30NHA4
PUY-A36NHA4
PUY-A42NHA4
PUY-A12NHA4-BS
PUY-A18NHA4-BS
PUY-A24NHA4-BS
PUY-A30NHA4-BS
PUY-A36NHA4-BS
PUY-A42NHA4-BS
[Service Ref.]
PUZ-A18NHA4
PUZ-A24NHA4
PUZ-A30NHA4
PUZ-A36NHA4
PUZ-A42NHA4
PUZ-A18NHA4-BS
PUZ-A24NHA4-BS
PUZ-A30NHA4-BS
PUZ-A36NHA4-BS
PUZ-A42NHA4-BS
PUY-A12NHA4
PUY-A18NHA4
PUY-A24NHA4
PUY-A30NHA4
PUY-A36NHA4
PUY-A42NHA4
PUY-A12NHA4-BS
PUY-A18NHA4-BS
PUY-A24NHA4-BS
PUY-A30NHA4-BS
PUY-A36NHA4-BS
PUY-A42NHA4-BS
NOTE:
This manual describes only
service data of the outdoor
units.
RoHS compliant products
have <G> mark on the spec
name plate.
PUZ-A24/30/36NHA4
PUY-A24/30/36NHA4
Outdoor unit
PARTS CATALOG (OCB481)

Table of Contents

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Mitsubishi Electric PUY-A18NHA4 Specifications

General IconGeneral
BrandMitsubishi Electric
ModelPUY-A18NHA4
CategoryAir Conditioner
LanguageEnglish

Summary

REFERENCE MANUAL

SAFETY PRECAUTION

General Safety Precautions

Highlights essential safety rules before accessing terminals and handling refrigerant.

Cautions for New Refrigerant

Details safety precautions for R410A refrigerant, including pipe cleaning and handling.

Cautions for Refrigerant Piping Work

Provides specific guidance on refrigerant piping for R410A, including pipe thickness and flare nut dimensions.

FEATURES

SPECIFICATIONS

DATA

Noise Criterion Curves

Presents noise level data in octave bands for different operating modes and models.

Standard Operation Data

Provides detailed operational data such as capacity, input, voltage, and refrigerant circuit specs.

OUTLINES AND DIMENSIONS

WIRING DIAGRAM

WIRING SPECIFICATIONS

Indoor Unit Power Supplied From Outdoor Unit

Details wiring specifications for systems where the outdoor unit supplies power to the indoor unit.

Separate Indoor/Outdoor Unit Power Supplies

Details wiring configurations for systems with separate power supplies for indoor and outdoor units.

Indoor-Outdoor Connecting Cable Specifications

Specifies wire size and maximum cable length for indoor-outdoor connecting cables.

M-NET Wiring Methods and Address Settings

Covers M-NET wiring, grounding, address setting, and refrigerant address configuration.

REFRIGERANT SYSTEM DIAGRAM

TROUBLESHOOTING

Troubleshooting Overview and Test Run Checks

Covers general troubleshooting, error code summaries, test run prerequisites, and self-diagnosis procedures.

Self-Diagnosis Procedures

Details self-diagnosis for normal operation, maintenance, remote controller, and wireless remote controller.

SELF-DIAGNOSIS ACTION TABLE

Lists error codes for power-on abnormalities with detection methods, cases, and corrective actions.

TROUBLESHOOTING BY INFERIOR PHENOMENA

Addresses issues like controller errors, abnormal sounds, and performance problems.

Troubleshooting Common Customer Complaints

Covers common issues reported by customers, such as unit not operating or unusual sounds.

EASY MAINTENANCE FUNCTION

Maintenance Mode Operation Method

Explains how to switch to and use maintenance mode, including fixed Hz operation and data measurement.

Guide for Operation Condition

Provides a guide for checking operation conditions and judging unit performance based on temperature differences.

FUNCTION SETTING

Unit Function Setting by Wired Remote Controller

Details procedures for selecting functions like refrigerant address and unit number using the wired remote.

Function Selection Procedure (Wired Remote)

Provides step-by-step instructions for function selection using the wired remote controller.

Function Selection via Wireless Remote Controller

Explains how to select functions such as temperature display and operational modes using the wireless remote.

Remote Controller Function Selection

Details various function settings configurable via the remote controller, like language and timer.

Temperature Display Unit Setting

Describes how to change the temperature display mode from Fahrenheit to Celsius.

MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

Request Code List and Data Monitoring

Lists request codes for monitoring operation data and provides details on specific data points.

Unit Setting Information via Request Codes

Details model, capacity, and setting information for outdoor and indoor units via request codes.

Wireless Pair Number Setting

Explains how to set the wireless pair number for indoor control boards.

DISASSEMBLY PROCEDURE

General Panel and Cover Removal

Provides steps for removing the service panel, top panel, front panel, and back panel.

Fan Motor and Electrical Parts Box Removal

Details the procedure for removing the fan motor and the electrical parts box.

Sensor and Valve Component Removal

Guides the removal of various sensors (thermistors) and valve coils.

Major Component Removal (Compressor, Accumulator, Reactor)

Covers the removal procedures for the compressor, accumulator, and reactor.

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