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Toshiba RAS-18SKP-E User Manual

Toshiba RAS-18SKP-E
73 pages
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Revised May, 2008
FILE NO. SVM-08032-1
SERVICE MANUAL
AIR CONDITIONER
SPLIT WALL TYPE
24 Class18 Class
RAS-18SKPX / RAS-18S2AX
RAS-24SKPX / RAS-24S2AX
RAS-18SKPX-V / RAS-18S2AX-V
RAS-18SKP-E / RAS-18S2A-E
RAS-24SKP-E / RAS-24S2A-E

Table of Contents

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Toshiba RAS-18SKP-E Specifications

General IconGeneral
TypeSplit System
Cooling Capacity5.0 kW
Power Supply220-240V, 50Hz
RefrigerantR410A
Coefficient of Performance (COP)3.61
Outdoor Unit Dimensions (HxWxD)550x780x290 mm
Noise Level (Outdoor)50 dB

Summary

1. SPECIFICATIONS

2. CONSTRUCTION VIEWS

2-1. Indoor Unit

Diagrams and dimensions of the indoor unit.

2-2. Outdoor Unit (18 Class)

Diagrams and dimensions of the 18 Class outdoor unit.

2-3. Outdoor Unit (24 Class)

Diagrams and dimensions of the 24 Class outdoor unit.

3. WIRING DIAGRAM

3-2. RAS-24SKPX / RAS-24S2AX, RAS-24SKP-E / RAS-24S2A-E

Wiring diagram for specific models (24 Class).

4. SPECIFICATION OF ELECTRICAL PARTS

4-1. Indoor Unit (RAS-18SKPX, RAS-18SKPX-V, RAS-18SKP-E)

Electrical part specifications for indoor units (18 Class).

4-2. Outdoor Unit (RAS-18S2AX, RAS-18S2AX-V, RAS-18S2A-E)

Electrical part specifications for outdoor units (18 Class).

4-3. Indoor (RAS-24SKPX, RAS-24SKP-E)

Electrical part specifications for indoor units (24 Class).

4-4. Outdoor Unit (RAS-24S2AX, RAS-S2A-E)

Electrical part specifications for outdoor units (24 Class).

5. REFRIGERATION CYCLE DIAGRAM

5-2. RAS-24SKPX / RAS-24S2AX, RAS-24SKP-E / RAS-24S2A-E

Refrigeration cycle diagram for 24 Class models.

6. CONTROL BLOCK DIAGRAM

7. OPERATION DESCRIPTION

7-1. Remote Control Operations

Details function, display, and buttons of the remote control.

7-2. Air Conditioner Control Overview

Explains roles of indoor/outdoor controllers and system logic.

7-2-1. Louver Control

Describes vertical airflow louver control (position and swing).

7-2-2. Indoor Fan Control

Explains indoor fan speed control based on operation modes.

7-3. Operation Mode Descriptions

Describes different operation modes like Fan only, Cooling, Dry, Auto.

7-3-1. Fan Only Operation

Details fan-only operation settings and fan speed control.

7-3-2. Cooling Operation

Explains cooling operation control for compressor, fan, and display.

7-3-3. Dry Operation

Details dry operation control for compressor, fan, and display.

7-3-4. Automatic Operation

Explains automatic operation selection based on temperature.

7-4. Safety and Reliability Functions

Explains functions like low-temperature limit control.

7-5. One-Touch Operation

Details the fully automated one-touch comfort operation.

7-6. Special Operation Modes

Covers Hi POWER, QUIET, and ECO operations.

7-9. COMFORT SLEEP Operation

Details the COMFORT SLEEP mode for enhanced comfort and energy saving.

7-10. Filter Check and Timer Functions

Explains filter lamp and timer-related operations.

7-11. Auto Restart Function

Describes the auto restart function after power failure.

7-11-1. How to Set the Auto Restart Function

Provides steps to enable the auto restart function.

7-11-2. How to Cancel the Auto Restart Function

Explains how to disable the auto restart function.

7-11-3. Power Failure During Timer Operation

Notes the effect of power failure on timer operations.

7-12. Self-Cleaning Operation

Explains the self-cleaning operation to keep the unit clean.

7-12-1 Self-Cleaning diagram

Illustrates the self-cleaning operation sequence and conditions.

7-12-2 Self-Cleaning function release

Details how to cancel and set the self-cleaning function.

8. INSTALLATION PROCEDURE

8-1. Safety Cautions

Crucial safety warnings and precautions for installation.

8-2. Installation Diagram of Indoor and Outdoor Units

Visual guide for installing indoor and outdoor units with dimensions.

8-3. Installation

Covers optional parts and accessories for installation.

8-3-1. Optional installation parts

Lists and describes optional parts for installation.

8-3-2. Accessory and installation parts

Lists accessories and installation parts with their illustrations.

8-4. Indoor Unit

Details regarding indoor unit installation.

8-4-1. Installation Place

Specifies ideal locations and conditions for indoor unit installation.

8-4-2. Drilling a Hole and Mounting Installation Plate

Instructions for drilling wall holes and mounting the installation plate.

8-4-3. Electrical Work

Details electrical wiring requirements and connection methods.

8-4-4. Wiring Connection

Steps for connecting the connecting cable to the indoor unit.

8-4-5. Piping and Drain Hose Installation

Guides on forming pipes, drain hoses, and installation.

8-4-6. Indoor Unit Installation

Steps for physically mounting the indoor unit onto the installation plate.

8-4-7. Drainage

Instructions for ensuring proper drainage from the indoor unit.

8-5. Outdoor Unit

Details regarding outdoor unit installation.

8-5-1. Installation place

Specifies ideal locations and conditions for outdoor unit installation.

8-5-2. Refrigerant piping connection

Details how to connect refrigerant pipes, including flaring.

8-5-3. Evacuating

Instructions for evacuating air from the refrigerant system using a vacuum pump.

8-5-4. Wiring connection

Steps for connecting power supply and connecting cables to the outdoor unit.

8-6. Test Operation

Covers gas leak test, test operation, and settings.

8-6-1. Gas Leak Test

Procedures for checking refrigerant gas leaks after installation.

8-6-2. Test Operation

Steps to perform a test run of the air conditioner system.

8-6-3. Auto Restart Setting

Instructions for setting the auto restart function.

8-6-4. Remote Controller A or B Selection

Explains how to set remote control A/B selection for multiple units.

9. TROUBLESHOOTING CHART

9-1. Troubleshooting Procedure

General steps for troubleshooting the air conditioner.

9-2. Basic Check Items

Lists basic checks for power, connections, and voltage.

9-2-1. Power Supply Voltage

Checks if the power supply voltage is within the specified range.

9-2-2. Incorrect Cable Connection

Verifies correct cable connections between indoor and outdoor units.

9-2-3. Program Control

Explains microcontroller operation and checking against problems.

9-3. Primary Judgement

Provides initial diagnosis based on symptoms and lamp indicators.

9-3-1. Indoor Unit Controller Role

Describes the functions of the indoor unit controller.

9-3-2. Failure Diagnosis

Explains how the unit self-diagnoses and indicates faults.

9-4. Remote Controller Self-Diagnosis

Guides for self-diagnosis and reading check codes via remote controller.

9-4-1. Service Mode Usage

Provides steps to enter service mode and navigate check codes.

9-5. Indoor Unit Troubleshooting

Guides for diagnosing and resolving indoor unit issues.

9-5-1. Power Can Not Be Turned On

Troubleshooting steps when the unit does not turn on.

9-5-2. Indoor Fan Motor Failure

Troubleshooting steps when only the indoor fan motor fails to operate.

9-5-3. Compressor Not Operating

Troubleshooting steps when the compressor does not operate.

9-6. Wiring Troubleshooting

Guides for diagnosing wiring issues between units.

9-6-1. Outdoor Unit Not Operating

Checks voltage and signal transmission for outdoor unit operation.

9-6-2. Outdoor Unit Stops Intermittently

Diagnoses issues causing the outdoor unit to stop and restart.

9-7. P.C. Board Troubleshooting

Guides for diagnosing and resolving issues related to the P.C. board.

9-7-1. Indoor P.C. Board Check

Procedures for inspecting the indoor unit's P.C. board for defects.

9-8. Remote Control Troubleshooting

Guides for diagnosing and resolving issues with the remote control.

10. HOW TO REPLACE THE MAIN PARTS

10-1. Indoor Unit

Procedures for replacing main parts of the indoor unit.

10-2 Outdoor Unit (RAS-18S2AX, RAS-18S2AX-V, RAS-18S2A-E)

Procedures for replacing main parts of the 18 Class outdoor unit.

10-3. Outdoor Unit (RAS-24S2AX, RAS-24S2A-E)

Procedures for replacing main parts of the 24 Class outdoor unit.

11. EXPLODED VIEWS AND PARTS LIST

11-1. Indoor Unit (E-Parts Assy)

Exploded view and parts list for the indoor unit (E-Parts Assy).

11-2. Indoor Unit

Exploded view and parts list for the indoor unit.

11-3. Outdoor Unit (RAS-18S2AX, RAS-18S2AX-V, RAS-18S2A-E)

Exploded view and parts list for the 18 Class outdoor unit.

11-4. Outdoor Unit (RAS-24S2AX, RAS-24S2A-E)

Exploded view and parts list for the 24 Class outdoor unit.

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