Mitsubishi Electric PUY-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 PUY-A30NHA Specifications

General

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

Summary

Technical Changes

Reference Manual

Indoor Unit

Lists indoor units and their service references.

Technical Data Book

Specifies the manual number for technical data.

Safety Precautions

Always Observe for Safety

General safety rules before accessing terminals.

Cautions Related to New Refrigerant

Specific precautions for R410A refrigerant.

Cautions for Refrigerant Piping Work

Guidelines for refrigerant piping work with R410A.

Features

Chargeless System

Pre-charged refrigerant system for piping length at shipment.

Specifications

Data

Refilling Refrigerant Charge (R410A : oz, kg)

Table showing refrigerant charge amounts by piping length.

Compressor Technical Data

Technical data for compressors.

Noise Criterion Curves

Noise criterion curves for different models.

Standard Operation Data

Standard operation data for various models.

Outlines and Dimensions

Free Space Around the Outdoor Unit

Minimum installation space requirements around the unit.

Foundation Bolts

Instructions for securing the unit with foundation bolts.

Piping-Wiring Direction

Guidance on piping and wiring connection directions.

Minimum Installation Space for Outdoor Unit

Specifies minimum clearances for installation.

Wiring Diagram

Wiring Specifications

Indoor Unit Power Supplied from Outdoor Unit (A-control Application)

Wiring patterns for indoor units powered by the outdoor unit.

M-NET Wiring Method

Guidelines for M-NET wiring to prevent noise interference.

Refrigerant System Diagram

Troubleshooting

Refrigerant Collecting (Pump Down)

Procedure to collect refrigerant before moving the unit.

Start and Finish of Test Run

Steps to start and finish a test run operation.

11-1. Troubleshooting

Summary of error codes and actions.

11-2. Check Point Under Test Run

Pre-run checks and important points during test runs.

11-3. How to Proceed "Self-Diagnosis"

Methods for self-diagnosis and error checking.

11-3-1. When a Problem Occurs During Operation

Display of error codes when problems occur during operation.

11-3-2. Self-Diagnosis During Maintenance or Service

How to recall error code history for diagnosis.

11-3-3. Remote Controller Diagnosis

Procedure to diagnose remote controller functionality.

11-3-4. Malfunction-Diagnosis Method by Wireless Remote Controller

Method for diagnosing malfunctions using a wireless remote.

11-4. Self-Diagnosis Action Table

Table detailing actions for self-diagnosis errors.

11-5. Troubleshooting by Inferior Phenomena

Troubleshooting guidance based on observed symptoms.

Phone Calls From Customers

Common customer issues and response guidance.

11-6. How to Check the Parts

Procedures to check specific components and their resistance.

11-8. Emergency Operation

Procedures for emergency operation when unit fails.

11-9. Test Point Diagram

Diagrams showing test points on controller boards.

11-10. Function of Switches, Connectors and Jumpers

Description of switches, connectors, and jumpers.

Easy Maintenance Function

12-1. Maintenance Mode Operation Method

Steps to enter and use maintenance mode for operation data checks.

Switching to Maintenance Mode

How to activate maintenance mode when unit is operated or stopped.

Fixed Hz Operation

Fixing operating frequency for stable inverter model inspection.

Data Measurement

Measuring operation data after stabilization.

Refrigerant Address

Explanation of refrigerant address settings for single and multi-systems.

12-2. Guide for Operation Condition

Guide for determining operation condition based on temperature differences.

Function Setting

13-1. Unit Function Setting by the Remote Controller

How to set unit functions using the remote controller.

Selecting Functions Using the Wired Remote Controller

Step-by-step guide for function selection via wired remote.

Operating Procedure

Detailed steps for function selection via remote controller.

13-2. Function Selection of Remote Controller

Setting various functions via remote controller menus.

13-3. Function Selection of Wireless Remote Controller

How to change temperature display units using wireless remote.

Monitoring the Operation Data by the Remote Controller

14-1. How to "Monitor the Operation Data"

Steps to monitor operation data using the remote controller.

14-2. Request Code List

List of request codes for monitoring operation data.

Disassembly Procedure

1. Removing the Service Panel, Top Panel, Front Panel and Back Panel

Steps to remove outer panels for access.

2. Removing the Fan Motor

Procedure for removing the fan motor assembly.

3. Removing the Electrical Parts Box

Steps to remove the electrical parts box.

4. Removing the Thermistor <Outdoor 2-phase pipe> (TH6) and Thermistor <Outdoor pipe> (TH3)

Procedure to remove outdoor pipe and 2-phase pipe thermistors.

5. Removing the Thermistor <Outdoor> (TH7)

Procedure to remove the outdoor thermistor.

6. Removing the Thermistor <Outdoor pipe> (TH3) and Thermistor <Discharge> (TH4)

Procedure to remove outdoor pipe and discharge thermistors.

7. Removing the Solenoid Valve Coil <Four-way valve> (21S4), Linear Expansion Valve Coil (LEV-A) and Solenoid Valve Coil <Bypass valve> (SV)

Steps to remove solenoid valve coils and expansion valve coil.

8. Removing the Four-way Valve

Procedure for removing the four-way valve.

9. Removing Linear Expansion Valve

Procedure for removing the linear expansion valve.

10. Removing the High Pressure Switch (63H) and Low Pressure Switch (63L)

Procedure to remove high and low pressure switches.

11. Removing the Reactor (DCL) and Capacitor (CE)

Steps to remove the reactor and capacitor.

12. Removing the Compressor (MC)

Procedure for removing the compressor.

13. Removing the Accumulator

Procedure for removing the accumulator.

Parts List

Structural Parts

List of structural components for various models.

Functional Parts

List of functional components for various models.

RoHS Parts List (RoHS Compliant)