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Mitsubishi Heavy Industries SRC25MA-S User Manual

Mitsubishi Heavy Industries SRC25MA-S
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Mitsubishi Heavy Industries Air Conditioners
Technical Manual
Manual Number: 2011 No. W2-01
Variable Frequency Wall Mounted Type
Room Air Conditioners
(Split system, heat pump type)
SRK20MA-S/SRC20MA-S
SRK25MA-S/SRC25MA-S
SRK35MA-S/SRC35MA-S
SRK50MA-S/SRC50MA-S
(R410A Refrigerant Used)
MITSUBISHI HEAVY INDUSTRIES, LTD.
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Mitsubishi Heavy Industries SRC25MA-S Specifications

General IconGeneral
Cooling Capacity2.5 kW
Heating Capacity3.2 kW
Power Supply220-240V, 50Hz
RefrigerantR32
TypeSplit System
Noise Level (Indoor Unit)21 dB
Noise Level (Outdoor Unit)49 dB

Summary

General Information and Model Selection

1.1 Features

Details inverter, fuzzy control, comfort modes, humanization, life, and self-diagnosis.

1.2 Model Identification

Explains how to identify the model number and its components.

2.1 Model Specifications

Lists detailed specifications for various indoor/outdoor units (SRK20MA-S, SRC20MA-S, etc.).

2.2 Operational Range & Drawings

Specifies operating conditions, limits, and provides dimensional drawings for the indoor unit.

Electrical Wiring and Component Identification

3 Electrical Wiring Diagram

Presents circuit diagrams for indoor and outdoor units.

4.1 Component Identification

Identifies and describes the function of various parts of the indoor and outdoor units.

Operation Modes and Functions

4.2-4.5 Operation Modes & Controls

Covers emergency switch, auto restart, key lock, and CLEAN operation.

4.6-4.7 Sleep & Timing Operations

Explains SLEEP operation and setting the timer for unit turn-off.

4.8-4.9 Timer Functions

Details setting ON timers and programmed ON/OFF timers.

4.10-4.12 Time Setting & Special Modes

Covers current time setting, HI POWER, and JET operations.

4.13-4.14 Airflow & Power Saving

Explains POWER SAVE mode and air direction regulation.

4.15-4.17 Area, Location & Auto Operation

Details area setting, installation location, and auto operation logic.

4.18-4.19 Drying & Defrosting Operations

Explains the drying and defrosting operation cycles and conditions.

4.20-4.23 Airflow Control & Compressor

Covers flap control, EEV control, compressor control, and outdoor fan control.

4.24 Indoor Fan Control

Explains the speed settings and control of the indoor fan.

Installation Procedures

5.1 Installation Location Selection

Guides on choosing suitable indoor and outdoor unit installation locations.

5.2-5.4 Unit Installation & Piping

Step-by-step guides for indoor/outdoor unit installation and pipe connection.

Maintenance and Servicing

6.1 Electrical Failure Diagnosis

Outlines a systematic method for diagnosing electrical part failures.

Service Mode & Self-Diagnosis

Explains using service mode for failure reading and self-diagnosis indications.

Error & Stop Code Lists

Provides comprehensive lists of error/stop codes, causes, and conditions.

Sensor Failure Troubleshooting

Provides troubleshooting steps for various sensor failures.

Unit & Compressor Error Troubleshooting

Troubleshooting for outdoor unit errors, compressor overheat, and power cut.

Communication & Motor Error Troubleshooting

Troubleshooting for serial transmission, fan motor, and compressor lock errors.

Component & Fan Motor Checks

Guides on checking indoor electrical components and fan motor.

Remote Controller Failure Diagnosis

Step-by-step guide to diagnose remote controller issues.

Outdoor Unit & Inverter Checks

Provides circuit diagrams and checks for outdoor unit and inverter.

EEV & Outdoor Fan Motor Checks

Procedures for checking the EEV and outdoor fan motor.

6.2 Servicing Procedures

Details servicing steps like evacuation, refrigerant charging, and recovery.

R410A Refrigerant and Installation

7.1 R410A Refrigerant Overview

Details on using R410A, its properties, and safety.

7.1.2 Installation & Servicing Safety

Safety precautions for installation and servicing with R410A.

7.2 Mounting Refrigerant Pipes

Covers materials, joints, and procedures for mounting refrigerant pipes.

7.2.2 Piping Handling & Welding

Precautions for handling piping materials and procedures for welding.

7.2.3 Flaring & Tool Applicability

Details flaring procedures and tool applicability for R410A/R22.

Installation, Removal, and Servicing

7.3.2-7.3.5 Installation & Replacement Procedures

Guides for new installation, removal, replacement, and refitting.

7.3.6 Recharging & 7.4 Refrigerant Recovery

Procedures for recharging refrigerant and recovering refrigerant.

7.4.1 Recovery Procedure Steps

Steps for checking and preparing the recovery procedure.

7.4.2 Accessories & Tools for Recovery

Lists accessories and tools needed for R410A recovery.

Mount Assembly - Indoor Unit

8.1 Indoor Unit Assemblies

Parts lists and diagrams for indoor unit panel/fan and heat exchanger/control assemblies.

Mount Assembly - Outdoor Unit

8.2 Outdoor Unit Assemblies

Exploded views and parts lists for outdoor units.

8.2.1-8.2.4 Outdoor Unit Panel/Fan & Heat Exch/Control

Parts lists and diagrams for outdoor unit panel/fan and heat exchanger/control assemblies.

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