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Toshiba RAS-25J2KVSG-ND User Manual

Toshiba RAS-25J2KVSG-ND
123 pages
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SERVICE MANUAL
R32
Indoor Unit
RAS-25J2KVSG-ND
RAS-35J2KVSG-ND
SPLIT TYPE
Outdoor Unit
RAS-25J2AVSG-ND
RAS-35J2AVSG-ND
Revised on July, 2020
FILE NO. SVM-20065-3
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Toshiba RAS-25J2KVSG-ND Specifications

General IconGeneral
TypeSplit System
Cooling Capacity2.5 kW
Heating Capacity3.2 kW
RefrigerantR32
Noise Level (Indoor)21 dB(A)
Power Supply220-240V, 50Hz
Indoor Unit Net Weight9 kg
Outdoor Unit Net Weight23 kg
Noise Level (Indoor Unit)21 dB(A)

Summary

Safety Precautions

Refrigerant Safety and Handling

Precautions for R32 refrigerant, installation, and servicing safety.

Specifications

Unit and Piping Specifications

Details on unit dimensions, capacity, electrical specs, piping, and refrigerant.

Accessories and Installation Parts

Lists indoor unit accessories and optional installation parts.

Refrigerant R32

R32 Refrigerant Safety and Installation

Safety during installation/servicing and refrigerant piping installation guidelines.

Required Tools for R32 System

Lists tools exclusive for R32 and interchangeable tools.

Refrigerant Recharging Procedure

Details the steps and precautions for charging refrigerant.

Construction Views

Indoor and Outdoor Unit Construction

Diagrams and dimensions of indoor and outdoor unit components.

Wiring Diagram

Specifications of Electrical Parts

Electrical Parts Specifications (Indoor/Outdoor)

Lists electrical components for both units and their specifications.

Refrigerant Cycle Diagram

Refrigerant Cycle and Operation Data

Illustrates refrigerant flow and provides operational data based on conditions.

Control Block Diagram

Indoor and Outdoor Unit Control Block Diagrams

Shows control logic and components for indoor and outdoor units.

Operation Description

Air Conditioner Control Overview

General overview of control system, roles of controllers, and command signals.

Detailed Operation Modes and Controls

Covers basic, cooling, heating, AUTO, DRY, fan motor, louver, and special modes.

Remote Control Features and Timer Operations

Explains remote control selection, Hi-POWER, timer, preset, and airflow functions.

Auto Restart Function and Remote Control Indications

Details auto restart function and remote control display indicators.

Remote Control Operation and Timer Settings

Operation of weekly timer, editing, deleting programs, and remote control indicators.

Specific Operation Modes and Features

Explains Auto, Fireplace, 8°C Heating, Cooling/Heating/Fan Only, Dry, Hi-POWER, ECO, COMFORT SLEEP, HADA CARE.

Power Selection, Silent Operation, and Timer

Covers outdoor unit power selection, silent operation, and timer settings.

Preset Operation and Airflow Direction

Explains preset operation and how to adjust airflow direction.

Remote Controller Display Indications

Explains the meaning of various indicators and symbols on the remote control display.

Installation Procedure

Installation Diagrams and Part Identification

Illustrates unit placement and lists all installation parts.

Installation Tools and R32 Specifics

Details tools required for R32 refrigerant and installation/servicing tools.

Indoor Unit Installation Placement and Mounting

Specifies ideal locations for the indoor unit and how to mount the installation plate.

Piping, Drain Hose, and Remote Wiring

Covers piping, drain hose installation, and wired remote controller connection.

Outdoor Unit Installation and Cold Climate Precautions

Specifies outdoor unit placement and precautions for cold regions.

Refrigerant Piping Connection and Evacuation

Steps for connecting pipes, flaring, tightening, and performing evacuation.

Electrical Works and Wiring Connections

Instructions for connecting power supply and wiring for indoor and outdoor units.

Installation Checks and Settings

Covers gas leak testing, remote control A/B selection, test operation, and auto restart.

How to Diagnose the Trouble

Troubleshooting Overview and Initial Checks

General troubleshooting procedures, precautions, and initial confirmation steps.

Troubleshooting via Unit Indicators and Codes

Interprets LED flashing codes and self-diagnosis via remote controller.

Symptom-Based Troubleshooting (Indoor Unit)

Flowcharts for diagnosing indoor unit issues like no power or fan motor problems.

Wiring Failures and Outdoor Unit Operation Issues

Troubleshooting for wiring failures and outdoor unit stopping or not operating.

Checking Main Parts (PMV, Sensors)

Procedures for checking main parts like pulse motor valve and temperature sensors.

Outdoor Unit Inverter and Component Diagnosis

Summarizes inverter diagnosis and checks for compressor winding resistance.

Indoor Unit P.C. Board and Component Checks

Precautions and procedures for checking the indoor unit's P.C. board and other parts.

Detailed Indoor Unit Troubleshooting Procedures

Step-by-step procedures for checking various indoor unit components and their causes.

P.C. Board Layout and Sensor Data

Diagram of the P.C. board layout and resistance characteristics of sensors.

Component Resistance Checking (Indoor/Outdoor)

Procedures for checking resistance values of indoor and outdoor unit components.

Checking Methods for Capacitors and Converter Modules

Details checking methods for electrolytic capacitors and converter modules.

Diagnosing Outdoor Fan Motor Issues

Explains symptoms, causes, and methods to determine if the outdoor fan motor is faulty.

How to Replace the Main Parts

Indoor Unit Main Parts Replacement Procedures

Procedures for replacing indoor unit parts like air filters and grilles.

Indoor Unit Panel and Electric Box Replacement

Steps for removing and replacing the front panel and electric parts box assembly.

Indoor Unit Fan Motor and Louver Replacement

Procedures for replacing the fan motor and horizontal louver.

Indoor Unit Drain Pan and Display Replacement

Steps to remove and reinstall the drain pan assembly and unit display.

Indoor Unit Louver and Fan Assembly Replacement

Procedures for replacing the vertical louver assembly and cross flow fan.

Indoor Unit Heat Exchanger and Microcomputer Replacement

Steps for replacing the heat exchanger and microcomputer.

Outdoor Unit Cabinet and Front Panel Replacement

Procedures for detaching outdoor unit parts and replacing the front cabinet.

Outdoor Unit Inverter Assembly Replacement

Steps for safely replacing the inverter assembly, including discharging.

Outdoor Unit Control Board Assembly Replacement

Procedures for disconnecting and replacing the control board assembly.

Outdoor Unit Side Cabinet and Fan Motor Replacement

Steps for replacing side cabinets and the fan motor.

Outdoor Unit Compressor and Reactor Replacement

Procedures for replacing the compressor and reactor.

Outdoor Unit Expansion Valve Coil and Fan Guard Replacement

Steps for replacing the expansion valve coil and fan guard.

Outdoor Unit Sensor Replacement Procedures

Instructions for installing and replacing various temperature sensors.

Exploded Views and Parts List

Indoor Unit Exploded View and Parts List

Diagram showing indoor unit parts and a corresponding parts list.

Indoor Unit (Part-E) Exploded View and Parts List

Diagram and parts list for specific internal components of the indoor unit.

Outdoor Unit Exploded View and Parts List

Diagram showing outdoor unit parts and a corresponding parts list.

Outdoor Unit (Part-E) Exploded View and Parts List

Diagram and parts list for specific internal components of the outdoor unit.

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