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Toshiba RAS-24NKP-E User Manual

Toshiba RAS-24NKP-E
74 pages
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FILE NO. SVM-06004
SERVICE MANUAL
AIR CONDITIONER
SPLIT WALL TYPE
RAS-18NKHP-E / RAS-18NAH-E
RAS-18NKP-E / RAS-18NA-E
RAS-24NKP-E / RAS-24NA-E
RAS-B18NKPX / RAS-18N2AX
RAS-24NKPX / RAS-24N2AX
24 Class18 Class
May, 2006

Table of Contents

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Toshiba RAS-24NKP-E Specifications

General IconGeneral
Power Supply220-240V, 50Hz
RefrigerantR410A
Energy Efficiency Ratio (EER)3.21
Coefficient of Performance (COP)3.61
Noise Level (Indoor)45 dB(A)
TypeSplit

Summary

Specifications

Construction Views

Indoor Unit Construction Views

Detailed diagrams of the indoor unit's physical structure and dimensions.

Outdoor Unit (24 Class) Construction Views

Diagrams illustrating the physical structure and dimensions of the 24 Class outdoor unit.

Outdoor Unit (18 Class) Construction Views

Diagrams showing the physical structure and dimensions of the 18 Class outdoor unit.

Wiring Diagrams

Wiring Diagram for RAS-18NKHP-E / RAS-18NAH-E

Electrical wiring schematic for specific Toshiba air conditioner models.

Wiring Diagram for RAS-24NKP-E / RAS-24NA-E, RAS-24NKPX / RAS-24N2AX

Electrical wiring schematic for specific Toshiba air conditioner models.

Wiring Diagram for RAS-18NKP-E / RAS-18NA-E, RAS-18NKPX / RAS-18N2AX

Electrical wiring schematic for specific Toshiba air conditioner models.

Electrical Parts Specifications

Electrical Parts Specification: Indoor Unit (RAS-18NKHP-E)

Detailed list of electrical components for the indoor unit model.

Electrical Parts Specification: Outdoor Unit (RAS-18NAH-E)

Detailed list of electrical components for the outdoor unit model.

Electrical Parts Specification: Indoor Unit (RAS-24NKP-E, RAS-24NKPX, RAS-18NKP-E, RAS-18NKPX)

Detailed list of electrical components for multiple indoor unit models.

Electrical Parts Specification: Outdoor Unit (RAS-24NA-E, RAS-24N2AX)

Detailed list of electrical components for specific outdoor unit models.

Electrical Parts Specification: Outdoor Unit (RAS-18NA-E, RAS-18N2AX)

Detailed list of electrical components for specific outdoor unit models.

Refrigeration Cycle Diagrams

Refrigeration Cycle Diagram for RAS-18NKHP-E / RAS-18NAH-E

Diagram illustrating the refrigerant flow for specific indoor/outdoor units.

Refrigeration Cycle Diagram for RAS-24NKP-E / RAS-24NA-E, RAS-24NKPX / RAS-24N2AX

Diagram showing refrigerant flow for specific indoor/outdoor units.

Refrigeration Cycle Diagram for RAS-18NKP-E / RAS-18NA-E

Diagram illustrating the refrigerant flow for specific indoor/outdoor units.

Refrigeration Cycle Diagram for RAS-B18NKPX / RAS-18N2AX

Diagram illustrating the refrigerant flow for specific indoor/outdoor units.

Control Block Diagrams

Control Block Diagram for RAS-18NKHP-E

Diagram showing the control logic and signal flow for the unit.

Control Block Diagram for Multiple Models

Diagram showing control logic and signal flow for various unit models.

Operation Descriptions

Outline of Air Conditioner Control

Overview of how the indoor and outdoor units control the air conditioner's functions.

Louver Control

Details on how the air louvers operate, including manual and swing modes.

Indoor Fan Control (AC Fan Motor)

Explanation of the indoor fan motor's speed control and operation modes.

Description of Operation Circuit

Details on how the unit's circuits operate during different modes and conditions.

Fan Only Operation Description

Explanation of the unit's operation when only the fan is active.

Cooling Operation Description

Details on compressor, valve, and fan control during cooling mode.

Dry Operation Description

Explanation of compressor, valve, and fan control during dry mode.

Heating Operation Description (Heat Pump Model)

Details on control for compressor, valve, and fan during heating operation.

Automatic Operation Description

Explanation of how the unit automatically selects operation mode based on temperature.

Hi POWER Mode Operation

High-Temperature Limit Control

Low-Temperature Limit Control

Defrost Operation (Heat Pump Model)

Defrost Starting Conditions

Conditions that trigger the defrost operation based on temperature zones.

Defrost Finish Conditions

Conditions that determine when the defrost operation stops.

Auto Restart Function

How to Set Auto Restart Function

Step-by-step guide to enabling the auto restart function.

How to Cancel Auto Restart Function

Procedure to disable the auto restart function.

Filter Check Lamp

Self-Cleaning Function

How to Cancel Self-Cleaning Function

Procedure to cancel the self-cleaning function.

How to Set Self-Cleaning Function

Procedure to set and enable the self-cleaning function.

QUIET Mode Operation

COMFORT SLEEP Mode

COMFORT SLEEP Mode: Cooling Mode

Details of comfort sleep mode operation in cooling mode.

COMFORT SLEEP Mode: Heating Mode

Details of comfort sleep mode operation in heating mode.

Installation Procedures

Installation Safety Cautions

Essential safety precautions to follow during installation.

Installation Diagram: Indoor and Outdoor Units

Diagrams showing the placement and mounting of indoor and outdoor units.

Installation Details

Details regarding installation procedures and required parts.

Optional Installation Parts

List of optional parts needed for specific installation scenarios.

Accessory and Installation Parts

Catalog of accessories and parts included with the unit for installation.

Indoor Unit Installation

Specific guidelines and procedures for installing the indoor unit.

Indoor Unit Installation Place

Guidelines for selecting the optimal location for indoor unit installation.

Indoor Unit: Cutting Hole and Mounting Plate

Instructions for creating the pipe hole and mounting the installation plate.

Indoor Unit Electrical Work

Instructions for connecting the unit to the electrical supply.

Indoor Unit Wiring Connection

Detailed steps for connecting the electrical wiring.

Indoor Unit Piping and Drain Hose Installation

Steps for connecting refrigerant piping and installing the drain hose.

Indoor Unit Fixing and Mounting

Instructions for securely mounting the indoor unit onto the installation plate.

Indoor Unit Drainage

Guidance on proper drain hose setup to ensure effective drainage.

Outdoor Unit Installation

Specific guidelines and procedures for installing the outdoor unit.

Outdoor Unit Installation Place

Guidelines for selecting the optimal location for outdoor unit installation.

Outdoor Unit Refrigerant Piping Connection

Steps for connecting the refrigerant pipes to the outdoor unit.

Outdoor Unit Evacuating Procedure

Procedure for removing air and moisture from the refrigerant circuit.

Outdoor Unit Wiring Connection

Detailed steps for connecting the electrical wiring to the outdoor unit.

Setting Remote Control Selector Switch

Instructions for setting the remote control selector for multi-unit configurations.

Other Installation Procedures

Miscellaneous installation procedures and checks.

Gas Leak Test

Procedure for checking the refrigerant system for gas leaks.

Test Operation

How to perform a test run to confirm proper operation after installation.

Auto Restart Setting

Instructions for setting the auto restart function.

Troubleshooting Charts and Procedures

Troubleshooting Procedure Overview

General steps to follow for troubleshooting issues with the unit.

Basic Check Items for Troubleshooting

Initial checks for common problems before detailed diagnosis.

Troubleshooting: Power Supply Voltage

Checking if the power supply voltage is within the normal operating range.

Troubleshooting: Incorrect Cable Connection

Checking for proper connection of indoor and outdoor unit cables.

Troubleshooting: Program Control Checks

Verifying microcomputer control operations against expected behavior.

Primary Fault Judgement

Initial assessment of faults based on lamp indicators and symptoms.

Self-Diagnosis via Remote Control

Using the remote control to access and interpret self-diagnosis check codes.

Service Mode Operation for Self-Diagnosis

Steps to enter and operate the remote control in service mode.

Diagnosing Faulty Parts

Flowcharts for diagnosing specific faulty parts based on symptoms.

Troubleshooting: Indoor Unit

Specific troubleshooting guide for indoor unit problems.

Indoor Unit: No Power / Unit Not Operating

Procedure to diagnose why the indoor unit is not turning on.

Indoor Unit: Fan Not Operating

Procedure to diagnose why the indoor fan motor is not operating.

Indoor Unit: Compressor Not Operating

Procedure to diagnose why the compressor is not operating.

Troubleshooting: Wiring Issues

Troubleshooting steps for wiring issues between units.

Troubleshooting: Outdoor Unit Not Operating (Wiring)

Diagnosing wiring problems when the outdoor unit fails to operate.

Troubleshooting: Outdoor Unit Stops After Starting

Diagnosing issues where the outdoor unit stops intermittently after startup.

Troubleshooting: P.C. Boards

Troubleshooting procedures for P.C. board related issues.

Checking the Indoor P.C. Board

Procedure and checks for diagnosing faults with the indoor P.C. board.

Troubleshooting: Remote Control

Steps to diagnose and resolve issues with the remote control.

Part Replacement Procedures

Part Replacement: Indoor Unit (E-Parts Assy)

Procedure for replacing the front panel and electrical parts assembly.

Part Replacement: Indoor Unit Components

Procedures for replacing indoor unit parts like grille, filters, fan, and motor.

Part Replacement: Outdoor Unit (RAS-24NA-E, RAS-24N2AX)

Procedure for common part replacement in the outdoor unit.

Part Replacement: Outdoor Unit (RAS-18NAH-E, RAS-18NA-E, RAS-18N2AX)

Procedures for replacing components in specific outdoor unit models.

Exploded Views and Parts Lists

Exploded View and Parts List: Indoor Unit (E-Parts Assy)

Exploded diagram and list of parts for the indoor unit's assembly.

Exploded View and Parts List: Indoor Unit

Exploded diagram and list of parts for the indoor unit.

Exploded View and Parts List: Outdoor Unit (RAS-18NAH-E)

Exploded diagram and list of parts for the RAS-18NAH-E outdoor unit.

Exploded View and Parts List: Outdoor Unit (RAS-24NA-E, RAS-24N2AX)

Exploded diagram and list of parts for the RAS-24NA-E, RAS-24N2AX outdoor units.

Exploded View and Parts List: Outdoor Unit (RAS-18NA-E, RAS-18N2AX)

Exploded diagram and list of parts for the RAS-18NA-E, RAS-18N2AX outdoor units.

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