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Toshiba RAS-24UAH-E-1 User Manual

Toshiba RAS-24UAH-E-1
88 pages
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FILE NO. SVM-03010(1)
SERVICE MANUAL
AIR CONDITIONER
SPLIT WALL TYPE
Revised on Aug., 2003
RAS-24UKHP-E-1 / RAS-24UAH-E-1
RAS-18UKHP-E2 / RAS-18UAH-E2
RAS-24UKP-E-1 / RAS-24UA-E-1
RAS-24UKPX-1 / RAS-24UAX-1
RAS-24UKP-AR-1 / RAS-24UA-AR-1
RAS-24UKPX-T-1 / RAS-24UAX-T-1
RAS-18UKP-E2 / RAS-18UA-E2
RAS-18UKPX2 / RAS-18UAX2
RAS-18UKP-AR2 / RAS-18UA-AR2
RAS-18UKPX2-T2 / RAS-18UAX2-T2
18 Class
(Heat pump model)
24 Class18 Class
(Cooling only model)

Table of Contents

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Toshiba RAS-24UAH-E-1 Specifications

General IconGeneral
BrandToshiba
ModelRAS-24UAH-E-1
CategoryAir Conditioner
LanguageEnglish

Summary

Specifications

Construction Views

Indoor Unit

Detailed construction views and dimensions of the indoor unit.

Outdoor Unit

Construction views and dimensions for various outdoor unit models.

Wiring Diagram

RAS-24UKHP-E-1 / RAS-24UAH-E-1

Wiring diagram for specific indoor/outdoor unit models.

RAS-18UKHP-E2 / RAS-18UAH-E2

Wiring diagram for specific indoor/outdoor unit models.

RAS-24UKP-E-1 / RAS-24UA-E-1, RAS-24UKP-AR-1 / RAS-24UA-AR-1

Wiring diagram for specific indoor/outdoor unit models.

RAS-24UKPX-1 / RAS-24UAX-1, RAS-24UKPX-T-1 / RAS-24UAX-T-1

Wiring diagram for specific indoor/outdoor unit models.

RAS-18UKP-E2 / RAS-18UA-E2

Wiring diagram for specific indoor/outdoor unit models.

RAS-18UKPX2 / RAS-18UAX2

Wiring diagram for specific indoor/outdoor unit models.

RAS-18UKP-AR2 / RAS-18UA-AR2

Wiring diagram for specific indoor/outdoor unit models.

RAS-18UKPX2-T2 / RAS-18UAX2-T2

Wiring diagram for specific indoor/outdoor unit models.

Specification of Electrical Parts

Indoor Unit Electrical Parts

Specifications for electrical components of indoor units.

Outdoor Unit Electrical Parts

Specifications for electrical components of outdoor units.

Refrigeration Cycle Diagram

RAS-24UKHP-E-1 / RAS-24UAH-E-1 Refrigeration Cycle

Refrigeration cycle diagram and operating conditions.

RAS-18UKHP-E2 / RAS-18UAH-E2 Refrigeration Cycle

Refrigeration cycle diagram and operating conditions.

RAS-24UKPX-1 / RAS-24UAX-1, RAS-24UKPX-T-1 / RAS-24UAX-T-1 Refrigeration Cycle

Refrigeration cycle diagram and operating conditions.

RAS-18UKP-E2 / RAS-18UA-E2 Refrigeration Cycle

Refrigeration cycle diagram and operating conditions.

RAS-18UKPX2 / RAS-18UAX2 Refrigeration Cycle

Refrigeration cycle diagram and operating conditions.

RAS-18UKP-AR2 / RAS-18UA-AR2 Refrigeration Cycle

Refrigeration cycle diagram and operating conditions.

RAS-18UAX2-T2 Refrigeration Cycle

Refrigeration cycle diagram and operating conditions.

Control Block Diagram

RAS-24UKHP-E-1, RAS18UKHP-E2 Control Block Diagram

Control block diagram for specific indoor unit models.

Multiple Model Control Block Diagram

Control block diagram covering various indoor/outdoor unit models.

Operation Description

Outline of Air Conditioner Control

Overview of how the air conditioner is controlled.

Louver Control

Description of vertical air flow louver operation and settings.

Indoor Fan Control

Details on the indoor fan motor's speed control.

Description of Operation Circuit

Explanation of the operational control circuits.

Fan Only Operation

How the unit operates in fan-only mode.

Cooling Operation

Control logic for cooling mode operation.

Dry Operation

Control logic for dry mode operation.

Heating Operation

Control logic for heating mode operation (Heat pump models).

Automatic Operation

How automatic operation selects modes based on temperature.

Hi POWER Mode

Operation details when the Hi POWER mode is activated.

High-Temperature Limit Control

Control to prevent excessive refrigerating cycle pressure.

Low-Temperature Limit Control

Control to prevent indoor heat exchanger freezing.

Defrost Operation

Procedure for defrost operation in heating mode.

Auto Restart Function

Functionality and setting of the auto restart feature.

How to Set Auto Restart Function

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

How to Cancel Auto Restart Function

Instructions to disable the auto restart function.

Power Failure During Timer Operation

Effect of power failure on timer operations.

Filter Check Lamp

Indicator for filter maintenance and how to reset it.

How to Turn Off Filter Check Lamp

Procedure to reset the filter check lamp indicator.

Installation Procedure

Safety Cautions

Important safety precautions for installation.

Installation Diagram of Indoor and Outdoor Units

Diagrams showing placement and connections for installation.

Installation

General installation steps and considerations.

Optional Installation Parts

List and description of optional parts for installation.

Accessory and Installation Parts

Inventory of included accessories and installation components.

Indoor Unit Installation

Detailed procedures for installing the indoor unit.

Indoor Unit Installation Place

Guidelines for selecting the optimal installation location for the indoor unit.

Cutting Hole and Mounting Installation Plate

Steps for preparing the wall and mounting the installation plate.

Electrical Work

Procedures and precautions for electrical connections.

Wiring Connection

Instructions for connecting the indoor and outdoor unit wiring.

Piping and Drain Hose Installation

Guidance on connecting refrigerant pipes and drain hoses.

Indoor Unit Fixing

Steps for securely mounting the indoor unit to the installation plate.

Drainage

Ensuring proper drainage for the indoor unit.

Outdoor Unit Installation

General procedures for installing the outdoor unit.

Outdoor Unit Installation Place

Guidelines for selecting the optimal installation location for the outdoor unit.

Refrigerant Piping Connection

Detailed steps for connecting refrigerant pipes.

Evacuating

Procedure for evacuating the system using a vacuum pump.

Wiring Connection

Instructions for connecting the outdoor unit's wiring.

How to Set Remote Control Selector Switch

Guide to setting the remote control selector switch for multiple units.

Others

Miscellaneous installation procedures like gas leak testing.

Gas Leak Test

Procedure for checking for refrigerant gas leaks.

Test Operation

How to perform a test run of the air conditioner.

Auto Restart Setting

Information and setting for the auto restart function.

Troubleshooting Chart

Troubleshooting Procedure

General steps for troubleshooting issues.

Basic Check Items

Fundamental checks before diagnosing problems.

Power Supply Voltage Check

Verifying the main power supply voltage.

Indoor/Outdoor Unit Cable Connection Check

Ensuring correct connection of cables between units.

Program Control Check

Verifying the microcontroller's control logic.

Primary Judgement

Initial assessment of the unit's condition based on symptoms.

Role of Indoor Unit Controller

Functions and responsibilities of the indoor unit controller.

Failure Diagnosis

How the unit diagnoses and indicates failures.

Self-Diagnosis by Remote Control

Using the remote control for system self-diagnosis.

How to Use Remote Control in Service Mode

Steps to enter and use the remote control's service mode.

How to Diagnose Faulty Parts

Diagnostic flowcharts for identifying faulty components.

Troubleshooting for Indoor Unit

Specific troubleshooting steps for indoor unit issues.

Indoor Unit Power Not Turning On

Troubleshooting steps when the indoor unit does not operate.

Indoor Fan Motor Not Operating

Diagnosing issues when the indoor fan motor does not work.

Indoor Fan Motor Auto Rotation

Troubleshooting when the indoor fan motor rotates automatically.

Compressor Not Operating

Diagnosing issues when the compressor fails to operate.

Troubleshooting Wiring

Troubleshooting issues related to interconnect and signal wires.

Outdoor Unit Does Not Operate

Steps for troubleshooting when the outdoor unit is inactive.

Outdoor Unit Stops After Starting

Diagnosing why the outdoor unit stops shortly after operation.

Troubleshooting for P.C. Board

Steps for checking and troubleshooting the P.C. board.

How to Check Indoor P.C. Board

Procedure for inspecting the indoor unit's P.C. board.

How to Shorten Restart Delay Timer

Procedure to adjust the restart delay timer duration.

P.C. Board Layout

Diagrams showing the layout of components on the P.C. board.

Troubleshooting for Remote Control

Steps to diagnose and resolve remote control issues.

Part Replacement

Indoor Unit Part Replacement

Procedures for replacing parts of the indoor unit.

Outdoor Unit Part Replacement

Procedures for replacing parts of specific outdoor unit models.

Exploded Views and Parts List

Indoor Unit (E-Parts Assy) Exploded View

Exploded view and parts list for indoor unit electrical components.

Indoor Unit Exploded View and Parts List

Exploded view and parts list for the indoor unit.

Outdoor Unit (RAS-24UAH-E-1) Exploded View

Exploded view and parts list for the RAS-24UAH-E-1 outdoor unit.

Outdoor Unit (RAS-18UAH-E2) Exploded View

Exploded view and parts list for the RAS-18UAH-E2 outdoor unit.

Outdoor Unit (RAS-18UAX2) Exploded View

Exploded view and parts list for the RAS-18UAX2 outdoor unit.

Outdoor Unit (RAS-18UA-AR2) Exploded View

Exploded view and parts list for the RAS-18UA-AR2 outdoor unit.

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