Mitsubishi Electric PUZ-A30NHA User Manual

SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES·································2
2. REFERENCE MANUAL··································2
3. SAFETY PRECAUTION··································3
4. FEATURES ·····················································6
5. SPECIFICATIONS···········································7
6. DATA ·······························································9
7. OUTLINES AND DIMENSIONS····················13
8. WIRING DIAGRAM·······································16
9. WIRING SPECIFICATIONS ··························20
10. REFRIGERANT SYSTEM DIAGRAM ··············23
11. TROUBLESHOOTING···································26
12. EASY MAINTENANCE FUNCTION··············81
13. FUNCTION SETTING····································84
14. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ············92
15. DISASSEMBLY PROCEDURE ···················102
16. PARTS LIST ················································117
17. RoHS PARTS LIST ·····································126
No.OC367
REVISED EDITION-C
R410A
June 2007
[model names]
PUZ-A18NHA
PUZ-A24NHA
PUZ-A30NHA
PUZ-A36NHA
PUZ-A42NHA
PUZ-A18NHA-BS
PUZ-A24NHA-BS
PUZ-A30NHA-BS
PUZ-A36NHA-BS
PUZ-A42NHA-BS
PUY-A12NHA
PUY-A18NHA
PUY-A24NHA
PUY-A30NHA
PUY-A36NHA
PUY-A42NHA
PUY-A12NHA-BS
PUY-A18NHA-BS
PUY-A24NHA-BS
PUY-A30NHA-BS
PUY-A36NHA-BS
PUY-A42NHA-BS
[Service Ref.]
PUZ-A18NHA
PUZ-A24NHA
PUZ-A30NHA
PUZ-A36NHA
PUZ-A42NHA
PUZ-A18NHA-BS
PUZ-A24NHA-BS
PUZ-A30NHA-BS
PUZ-A36NHA-BS
PUZ-A42NHA-BS
PUY-A12NHA PUY-A12NHA
1
PUY-A18NHA PUY-A18NHA1
PUY-A24NHA PUY-A24NHA1
PUY-A30NHA PUY-A30NHA1
PUY-A36NHA PUY-A36NHA1
PUY-A42NHA
PUY-A12NHA
1-BS
PUY-A18NHA
1-BS
PUY-A24NHA
1-BS
PUY-A30NHA
1-BS
PUY-A36NHA
1-BS
PUY-A42NHA-BS
NOTE:
• This manual describes only
service data of the outdoor
units.
• RoHS compliant products
have <G> mark on the spec
name plate.
• For servicing RoHS compliant
products, refer to the RoHS
PARTS LIST.
PUZ-A24/30/36NHA
PUY-A24/30/36NHA
Revision:
• “9-2. SEPARATE INDOOR
UNIT/OUTDOOR UNIT
POWER SUPPLIES” is
deleted in REVISED
EDITION-C.
• Some descriptions have
been modified.
• Please void OC367 REVISED
EDITION-B.
Outdoor unit
OC367C--1.qxp 07.6.20 0:56 PM Page 1

Mitsubishi Electric PUZ-A30NHA Specifications

General

Brand	Mitsubishi Electric
Model	PUZ-A30NHA
Category	Air Conditioner
Language	English

Summary

Technical Changes

Reference Manual

Indoor Unit Reference

Lists indoor units, their service reference numbers, and manual numbers.

Technical Data Book

Specifies the manual number for the technical data book.

Safety Precautions

General Safety Observations

General safety instructions before accessing terminals.

R410A Refrigerant Cautions

Specific precautions for using R410A refrigerant.

Features

Chargeless System

Pre-charged refrigerant system for piping length at shipment.

Specifications

Data

Refrigerant Charge Data

Table showing refrigerant charge amounts by piping length.

Compressor Technical Data

Technical data for compressors, including winding resistance.

Outlines and Dimensions

Outdoor Unit Installation Space

Illustrates minimum installation space requirements around the unit.

Foundation Bolt Requirements

Details on foundation bolt requirements and installation.

Piping and Wiring Directions

Shows the direction for piping and wiring connections.

Minimum Outdoor Unit Installation Space

Specifies minimum clearance requirements for unit installation.

Wiring Diagram

Wiring Specifications

Indoor Unit Power Supplied by Outdoor Unit

Details wiring patterns for indoor units powered by outdoor units.

M-NET Wiring Method

Guidelines for M-NET wiring, including noise prevention and grounding.

Address Setting Regulations

Procedures for setting M-NET and refrigerant addresses for grouped systems.

Refrigerant System Diagram

Troubleshooting

Troubleshooting Summary

Summary of error codes and actions based on phenomenon recurrence.

Test Run Checkpoints

Pre-run checks and procedures before performing a test run.

Self-Diagnosis Procedure

Steps for initiating and interpreting self-diagnosis results.

Self-Diagnosis Action Table

Table detailing error codes, meanings, cases, and corrective actions.

Troubleshooting by Inferior Phenomena

Guides for diagnosing common operational issues and symptoms.

Part Checking Procedures

Procedures for testing specific components like thermistors, motors, and valves.

Component Checking Guide

Detailed resistance charts for thermistors.

Emergency Operation

Procedures for operating the unit in emergency mode.

Test Point Diagrams

Diagrams showing test points on the outdoor controller circuit board.

Switches, Connectors, and Jumpers

Explains the function of DIP switches and connectors for configuration.

Easy Maintenance Function

Maintenance Mode Operation

Steps to enter and use the maintenance mode for checking operation data.

Operation Condition Guide

A guide to determine operation conditions based on temperature differences.

Function Setting

Unit Function Setting via Remote Controller

Explains how to set unit functions using the remote controller.

Function Selection (Wired Remote)

Detailed steps for selecting functions via a wired remote controller.

Function Selection (Wireless Remote)

Detailed steps for selecting functions via a wireless remote controller.

Remote Controller Function Selection

Lists functions configurable via the remote controller's selection mode.

Temperature Display C/F Setting

Instructions for changing the temperature display unit (°C or °F).

Monitoring Operation Data

How to Monitor Operation Data

Steps to access and view operation data using the remote controller.

Request Code List

A comprehensive list of request codes for monitoring specific data points.

Request Code Details

Detailed explanations for various request codes and their corresponding data.

Disassembly Procedure

Removing Panels

Step-by-step guide for removing external panels.

Removing Fan Motor

Procedure for removing the fan motor assembly.

Removing Electrical Parts Box

Steps to remove the electrical parts box and its components.

Removing Thermistors (Outdoor)

Instructions for removing specific thermistors.

Removing Four-Way Valve and Expansion Valve

Guide for removing solenoid valve coils and linear expansion valve coil.

Removing High Pressure and Low Pressure Switches

Instructions for removing high and low pressure switches.

Removing Reactor and Capacitor

Procedure for removing the reactor and capacitor.

Removing Compressor

Steps to remove the compressor and its related parts.

Removing Accumulator

Procedure for removing the accumulator.

Parts List (non-RoHS compliant)

RoHS Parts List