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Mitsubishi Electric PURY-P250 User Manual

Mitsubishi Electric PURY-P250
352 pages
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Service Handbook
AIR CONDITIONERS
Models
PURY-(E)P200, P250, (E)P300, P350, P400YHM-A
PURY-EP400, (E)P450, (E)P500, (E)P600YSHM-A
PURY-P650,P700,P750,P800YSHM-A

Table of Contents

Questions and Answers:

Mitsubishi Electric PURY-P250 Specifications

General IconGeneral
SeriesPURY
RefrigerantR410A
Power Supply380-415V, 50Hz
Indoor Unit Dimensions (W x H x D)Varies by model
Weight (Indoor Unit)Varies by model

Summary

Safety Precautions

General Safety and Warnings

Covers general safety, warning/caution symbols, manual handling, and installation precautions.

Installation Safety

Details installation safety, unit placement, electrical work, and operational safety precautions.

Refrigerant Handling and System Safety

Precautions for refrigerant leaks, handling, and system safety features.

Electrical Work and Grounding Safety

Proper grounding, power supply wiring, breakers, and water spray precautions.

Pre-Test Run Precautions

Steps before test run, including power on duration, wet hands, pipe contact, and panel usage.

I Read Before Servicing

Servicing Preparation

Reading before servicing, tools, materials, and piping preparation.

Refrigerant Handling and System Procedures

Brazing, air tightness test, vacuum drying, refrigerant charging, and leak remedies.

Refrigerant and Oil Characteristics

Comparison of refrigerants and notes on machine oil.

II Restrictions

System Configuration and Cable Restrictions

Compatible units, cable types, lengths, and switch/address settings.

System Connection Examples

Examples of system connections for MA, M-NET, and combined controllers.

Pipe Length Restrictions

Guidelines for allowable pipe lengths based on system configuration.

III Outdoor Unit Components

Outdoor Unit Components Overview

Front view of outdoor unit and its main components.

Refrigerant Circuit Diagrams

Diagrams illustrating refrigerant flow for various outdoor unit models.

Control Box of the BC Controller

Components within the BC controller's control box.

Outdoor Unit Circuit Board

Layout and components of the outdoor unit control board.

IV Remote Controller

MA vs. M-NET Remote Controller Comparison

Comparing functions, specifications, wiring, and connection methods of MA and M-NET controllers.

Remote Controller Selection Criteria

Criteria for choosing between MA and M-NET remote controllers based on system needs.

Group Settings and Interlock Settings via the ME Remote Controller

Procedures for group and interlock settings using ME remote controller.

Interlock Settings via the MA Remote Controller

Procedures for setting LOSSNAY interlocks with the MA remote controller.

V Electrical Wiring Diagram

Outdoor Unit Wiring Diagram

Detailed electrical wiring diagram for the outdoor unit.

BC Controller Wiring Diagram

Electrical wiring diagram for the BC controller.

VI Refrigerant Circuit

Refrigerant Circuit Diagrams

Diagrams illustrating refrigerant flow for various outdoor unit models.

Principal Parts and Functions

Explanation of key components in the refrigerant circuit.

VII Control

Dipswitch Functions and Settings

Functions and factory settings of dipswitches on outdoor unit control board.

Outdoor Unit Control Methods

Outline of control methods, startup sequences, and initial control.

BC Controller Operations

Control details for solenoid valves, LEV, and SVMs in BC controllers.

Operation Flow Charts

Flowcharts for indoor and outdoor unit operation modes.

VIII Test Run Mode

Pre-Test Run Checks

Essential checks before initiating a test run.

Test Run Procedures

Step-by-step guide for performing a test run.

Refrigerant Amount Adjustment

Understanding characteristics and adjusting refrigerant levels.

Standard Operation Data

Reference data for standard operating conditions.

IX Troubleshooting

Error Code Lists

Comprehensive list of error codes, preliminary codes, and definitions.

Responding to Remote Controller Error Displays

Procedures for handling errors shown on the remote controller.

Cause, Check Method and Remedy

Troubleshooting steps for various faults including temperature and pressure sensors.

Refrigerant Leak Troubleshooting

Steps for identifying and fixing refrigerant leaks.

Compressor Replacement

Instructions for replacing the compressor.

Troubleshooting Flow Chart for LEV Solenoid Valve

Diagnostic flow for LEV solenoid valves.

X LED Monitor Display on the Outdoor Unit Board

How to Read the LED on the Service Monitor

Guide to reading LED displays, including numerical and flag formats.

Time Data Storage Function

Functionality of the outdoor unit's clock for time and error data storage.

LED Monitor Display Data

Current data displayed on the LED monitor for various items.

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