Toshiba RAS-18NKPX-T User Manual

FILE NO. SVM-06009
SERVICE MANUAL
AIR CONDITIONER
SPLIT WALL TYPE
June, 2006
RAS-24NKHP-E / RAS-24NAH-E
RAS-18NKPX-T / RAS-18N2AX-T
RAS-24NKPX-T / RAS-24N2AX-T

Toshiba RAS-18NKPX-T Specifications

General

Brand	Toshiba
Model	RAS-18NKPX-T
Category	Air Conditioner
Language	English

Summary

1. SPECIFICATIONS

3. WIRING DIAGRAM

3-1. RAS-24NKHP-E / RAS-24NAH-E Wiring

Electrical connections for specific indoor/outdoor units.

3-2. RAS-24NKPX-T / RAS-24N2AX-T Wiring

3-3. RAS-18NKPX-T / RAS-18N2AX-T Wiring

7. OPERATION DESCRIPTION

7-1. Outline of Air Conditioner Control

Explains the overall control logic and component roles.

7-2. Description of Operation Circuit

Details how various operating modes are controlled.

7-2-2. Cooling Operation

7-2-4. Heating Operation

7-2-5. Automatic Operation

7-3. Hi POWER Mode

7-7. Auto Restart Function

8. INSTALLATION PROCEDURE

8-1. Safety Cautions

Crucial safety guidelines before installation.

8-2. Installation Diagram of Indoor and Outdoor Units

Visual guide for unit placement and piping.

8-3. Installation

8-4. Indoor Unit Installation

Installation details for the indoor unit.

8-4-1. Installation Place (Indoor Unit)

8-4-2. Cutting Hole and Mounting Plate

8-4-3. Electrical Work (Indoor Unit)

Instructions for electrical connections for the indoor unit.

8-4-4. Wiring Connection (Indoor Unit)

8-4-5. Piping and Drain Hose Installation

8-4-6. Indoor Unit Fixing

8-5. Outdoor Unit Installation

Installation details for the outdoor unit.

8-5-1. Installation Place (Outdoor Unit)

8-5-2. Refrigerant Piping Connection

Steps for connecting refrigerant pipes.

8-5-3. Evacuating

Process for removing air from the refrigerant circuit.

8-5-4. Wiring Connection (Outdoor Unit)

8-7-1. Gas Leak Test

9. TROUBLESHOOTING CHART

9-1. Troubleshooting Procedure

General guide for troubleshooting.

9-2. Basic Check Items

Initial checks before diagnosing faults.

9-2-2. Incorrect Cable Connection

9-3. Primary Judgement

Initial fault assessment based on symptoms.

9-3-2. Failure Diagnosis

9-4. Self-Diagnosis by Remote Control

Using the remote for fault code diagnosis.

9-4-1. Service Mode Operation

Steps to enter service mode for diagnosis.

9-5. Diagnose Faulty Parts

Flowcharts for diagnosing specific component failures.

9-6. Indoor Unit Troubleshooting

Specific troubleshooting for indoor unit issues.

9-6-1. Power Not Turning On

Diagnosing power-related faults.

9-6-2. Indoor Fan Motor Not Operating

9-6-4. Compressor Not Operating

Diagnosing compressor failure.

9-7. Wiring Troubleshooting

Diagnosing wiring issues.

9-7-1. Outdoor Unit Does Not Operate

Troubleshooting outdoor unit power issues.

9-8. P.C. Board Troubleshooting

Diagnosing issues with the printed circuit board.

9-8-1. Checking Indoor P.C. Board

Procedures for checking the indoor P.C. board.

9-9. Remote Control Troubleshooting

Diagnosing and resolving remote control issues.