Toshiba RAS-24UK-AR User Manual

SERVICE MANUAL
AIR-CONDITIONER
SPLIT WALL TYPE
RAS-24UKX / RAS-24UAX
RAS-24UK-AR / RAS-24UA-AR
RAS-18UKX / RAS-18UAX
RAS-18UK-AR / RAS-18UA-AR
FILE NO. SVM-01010
24 Class18 Class
Dec., 2001

Toshiba RAS-24UK-AR Specifications

General

Brand	Toshiba
Model	RAS-24UK-AR
Category	Air Conditioner
Language	English

Summary

1. Specifications

2. Construction Views

2-1. Indoor Unit (RAS-24UKX, RAS-24UK-AR)

Detailed diagrams and dimensions for the indoor unit.

2-2. Indoor Unit (RAS-18UKX, RAS-18UK-AR)

Detailed diagrams and dimensions for the indoor unit.

2-3. Outdoor Unit (RAS-24UAX, RAS-24UA-AR)

Detailed diagrams and dimensions for the outdoor unit.

2-4. Outdoor Unit (RAS-18UAX, RAS-18UA-AR)

Detailed diagrams and dimensions for the outdoor unit.

3. Wiring Diagrams

3-1. RAS-24UKX / RAS-24UAX RAS-24UK-AR / RAS-24UA-AR Wiring

Electrical wiring diagram for specific models.

3-2. RAS-18UKX / RAS-18UAX RAS-18UK-AR / RAS-18UA-AR Wiring

Electrical wiring diagram for specific models.

4. Electrical Parts Specifications

4-1. Indoor Unit Parts Specifications

List and specifications of indoor unit electrical components.

4-2. Outdoor Unit (RAS-24UAX, RAS-24UA-AR) Parts Specs

List and specifications of outdoor unit electrical components.

4-3. Outdoor Unit (RAS-18UAX, RAS-18UA-AR) Parts Specs

List and specifications of outdoor unit electrical components.

5. Refrigeration Cycle Diagrams

5-1. RAS-24UKX / RAS-24UAX RAS-24UK-AR / RAS-24UA-AR Refrigeration Cycle

Diagram illustrating the refrigeration cycle for specific models.

5-2. RAS-18UKX / RAS-18UAX Refrigeration Cycle

Diagram illustrating the refrigeration cycle for specific models.

5-3. RAS-18UK-AR / RAS-18UA-AR Refrigeration Cycle

Diagram illustrating the refrigeration cycle for specific models.

6. Control Block Diagram

6-1. System Control Logic Overview

Block diagram showing the control flow of the air conditioner system.

7. Operation Description

7-1. Outline of Air Conditioner Control

Explains the roles of indoor and outdoor unit controllers.

7-2. Description of Operation Circuit

Details the operation circuits for different modes.

7-3. ECONO. Mode

Describes the quiet and mild operation mode.

7-4. High-Temperature Limit Control

Prevents excessive refrigerating cycle pressure.

7-5. Low-Temperature Limit Control

Prevents indoor heat exchanger from freezing.

7-6. Auto Restart Function

Allows automatic restart after power interruption.

7-7. Filter Check Lamp

Indicates when filter cleaning is required.

8. Installation Procedure

8-1. Safety Cautions

Essential safety precautions for installation.

8-2. Installation Diagram of Indoor and Outdoor Units

Visual guide for unit placement and piping connection.

8-3. Installation

Covers optional parts and accessories for installation.

8-4. Indoor Unit

Specific steps for installing the indoor unit.

8-5. Outdoor Unit

Specific steps for installing the outdoor unit.

8-6. Others

Includes gas leak test and auto restart setting.

9. Troubleshooting Chart

9-1. Troubleshooting Procedure

General steps for diagnosing issues.

9-2. Basic Check Items

Initial checks for power, wiring, and program control.

9-3. Primary Judgement

Interpreting self-diagnosis and initial fault indications.

9-4. Self-Diagnosis by Remote Control (Check Code)

Using the remote control to identify error codes.

9-5. How to Diagnose Faulty Parts

Flowcharts for diagnosing specific component failures.

9-6. Troubleshooting for Indoor Unit

Specific troubleshooting steps for indoor unit issues.

9-7. Troubleshooting for Wiring (Interconnect Cable and Serial Signal Wire)

Diagnosing issues related to interconnect and signal wiring.

9-8. Troubleshooting for P.C. Board

Procedures for checking and troubleshooting the PC board.

9-8-4. P.C. board layout

Diagram showing the layout of components on the PC board.

10. Part Replacement

10-1. Indoor Unit Part Replacement

Procedures for replacing indoor unit components.

10-2. Outdoor Unit (RAS-24UAX, RAS-24UA-AR) Part Replacement

Procedures for replacing outdoor unit components.

10-3. Outdoor Unit (RAS-18UAX, RAS-18UA-AR) Part Replacement

Procedures for replacing outdoor unit components.

11. Exploded Views and Parts List

11-1. Indoor Unit (1) Exploded View

Exploded diagram and parts list for the indoor unit.

11-2. Indoor Unit (2) Exploded View

Exploded diagram and parts list for the indoor unit.

11-3. Outdoor Unit (RAS-24UAX, RAS-24UA-AR) Exploded View

Exploded diagram and parts list for the outdoor unit.

11-4. Outdoor Unit (RAS-18UAX) Exploded View

Exploded diagram and parts list for the outdoor unit.

11-5. Outdoor Unit (RAS-18UA-AR) Exploded View

Exploded diagram and parts list for the outdoor unit.