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Mitsubishi Heavy Industries SRK25MA-S User Manual

Mitsubishi Heavy Industries SRK25MA-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 SRK25MA-S Specifications

General IconGeneral
TypeSplit System
Cooling Capacity2.5 kW
Heating Capacity3.2 kW
Energy Efficiency Ratio (EER)3.21
Coefficient of Performance (COP)3.61
Power Supply220-240 V, 50 Hz
Outdoor Unit Dimensions (W x H x D)780 x 540 x 290 mm
Weight (Outdoor Unit)30 kg
RefrigerantR410A
Noise Level (Outdoor)50 dB(A)

Summary

General Information and Features

1.1 Features

Details inverter, fuzzy control, comfort modes, and humanization features.

1.2 Model Identification

Explains the structure of the model number for identification.

Model Selection and Specifications

2.1 Model Function

Provides specifications for the SRK20MA-S indoor and SRC20MA-S outdoor units.

2.2 Range of Usage

Specifies the operating temperature and humidity ranges for cooling and heating.

2.3 Outline Drawing

Shows dimensional drawings of the indoor unit (MA-S Series).

2.4 Cooling Cycle System Diagram

Illustrates the refrigerant flow and components in the cooling cycle.

2.5 Performance Curve

Details capacity correction factors based on temperature, piping length, and frosting.

Electrical Wiring Diagrams

3.1 Circuit Diagram: 20, 25, 35MA-S

Electrical circuit diagram for the 20, 25, and 35MA-S models.

3.2 Circuit Diagram: 50MA-S

Electrical circuit diagram for the 50MA-S model.

Parts Identification and Functions

4.1 Name of Each Part

Identifies and labels the components of the indoor and outdoor units and accessories.

4.2 Emergency Switch

Explains the use of the ON/OFF button for emergency operation.

4.3 Automatic Restart Due to Power Cut

Describes the function of automatic restart after a power interruption.

4.4 Key Lock

Explains the key lock function to prevent accidental operation.

4.5 CLEAN Operation

Details the CLEAN operation for drying the indoor unit and preventing mold.

4.6 SLEEP Operation

Describes the SLEEP mode for maintaining comfortable temperatures automatically.

4.7 Timing OFF

Explains how to set the timer to turn off the air conditioner automatically.

4.8 Timing ON

Explains how to set the timer to turn on the air conditioner automatically.

4.9 Programmed Timer

Describes how to set a programmed timer for automatic ON/OFF cycles.

4.10 Current Time Setting

Details how to set the current time on the remote controller.

4.11 HI POWER Operation

Explains the HI POWER mode for rapid cooling or heating.

4.12 JET Operation

Describes the JET operation for maximum fan speed cooling or heating.

4.13 POWER SAVE Operation

Explains the POWER SAVE mode for energy efficiency.

4.14 Air Direction Regulation

Details how to adjust the vertical and horizontal flaps for air direction.

4.15 Area Setting

Explains the function to regulate indoor air distribution within specific areas.

4.16 Installation Location Setting

Describes how to set the installation location to optimize airflow.

4.17 Outline of Automatic Operation

Explains how the system automatically selects operating modes like cooling, heating, or drying.

4.18 Outline of Drying Operation

Details how the drying operation determines and adjusts its state based on temperatures.

4.19 Outline of Defrosting Operation

Explains the conditions and procedures for the defrosting operation.

4.20 Outline of Vertical and Horizontal Flaps Control

Describes the control of vertical and horizontal flaps for various operations.

4.21 Outline of Electronic Expansion Valve (EEV) Control

Explains the various control methods for the electronic expansion valve.

4.22 Outline of Compressor Control

Details the control logic for the compressor's ON/OFF and speed.

4.23 Outline of Outdoor Fan Control

Describes the control of the outdoor fan's rotate speed based on various conditions.

4.24 Outline of Indoor Fan Control

Explains the control of the indoor fan's rotate speed and priority.

Installation Procedures and Precautions

Precautions for Installation

Provides critical safety warnings and precautions for the installation process.

5.1 Selection of Installation Location

Guides on selecting appropriate indoor and outdoor unit installation locations.

5.2 Installation of Indoor Unit

Details the process of installing the indoor unit, including mounting plate and panel removal.

5.3 Installation of Outdoor Unit

Outlines the steps for installing the outdoor unit securely.

5.4 Pipe Connection

Explains the preparation and process for connecting refrigerant pipes.

5.5 Precautions for Wireless Remote Controller Operation

Lists important precautions for using the wireless remote controller.

5.6 Standard Running Data

Provides standard running data for different models under specified conditions.

Maintenance and Troubleshooting

6.1 Electrical Parts Failure Diagnosis Method

Outlines precautions and procedures for diagnosing electrical component failures.

6.2 Service Mode (Failure Mode Reading Function)

Explains how to use the service mode to read past error indications and protection stops.

Service Manual for R410A Refrigerant Systems

7.1 Overview

Provides an overview of R410A refrigerant and its properties.

7.1.1 R410A Refrigerant

Details the chemical properties and composition of R410A refrigerant.

7.1.2 Safety of Installation/Servicing

Outlines safety precautions for installing and servicing R410A systems.

7.2 Mounting Refrigerant Pipes

Covers the selection and mounting of copper pipes and joints for refrigerant piping.

7.3.2 New Installation (When New Refrigerant Piping is Used)

Details the new installation process including vacuum pump usage and refrigerant charging.

7.3.3 Removal (When New Refrigerant Piping is Used)

Explains the procedure for removing the equipment and its components.

7.3.4 Replacing Equipment (Never Use Existing Refrigerant Piping)

Advises on replacing equipment with new refrigerant piping to avoid issues.

7.3.5 Refitting Equipment

Warns against charging R22 units with R410A refrigerant.

7.3.6 Recharging Refrigerant in Servicing

Provides steps for recharging refrigerant during servicing.

7.4 Refrigerant Recovery

Outlines the general procedure for recovering refrigerant.

Mount Assembly Diagrams

8.1 Indoor Unit Panel & Fan Assy

Lists parts for the SRK20MA-S indoor unit's panel and fan assembly.

8.2.1 SRC20MA-S Outdoor Unit Panel & Fan Assy

Lists parts for the SRC20MA-S outdoor unit's panel and fan assembly.

8.2.2 SRC25MA-S Outdoor Unit Panel & Fan Assy

Lists parts for the SRC25MA-S outdoor unit's panel and fan assembly.

8.2.3 SRC35MA-S Outdoor Unit Panel & Fan Assy

Lists parts for the SRC35MA-S outdoor unit's panel and fan assembly.

8.2.4 SRC50MA-S Outdoor Unit Panel & Fan Assy

Lists parts for the SRC50MA-S outdoor unit's panel and fan assembly.

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