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Toshiba RAS-B22N3KV2-E User Manual

Toshiba RAS-B22N3KV2-E
108 pages
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R410A
August, 2012
AIR-CONDITIONER
SPLIT TYPE
SERVICE MANUAL
FILE NO. SVM-12056
Outdoor Unit
<Heat Pump Type>
RAS-18N3AV2-E
RAS-22N3AV2-E
Indoor Unit
<High Wall, Heat Pump Type>
RAS-18N3KV2-E
RAS-
B22N3KV2-E
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Table of Contents

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Toshiba RAS-B22N3KV2-E Specifications

General IconGeneral
TypeSplit System
Cooling Capacity2.2 kW
Heating Capacity2.5 kW
RefrigerantR32
Power Supply220-240V, 50Hz
Energy Efficiency Ratio (EER)3.21
Coefficient of Performance (COP)3.61
Indoor Unit Weight9 kg

Summary

Safety Precautions

Specifications

Specifications

Detailed technical specifications for indoor and outdoor units.

Operation Characteristic Curve

Graphical representation of cooling/heating current vs. compressor speed.

Capacity Variation Ratio According to Temperature

Graph showing cooling/heating capacity changes with outdoor temperature.

Refrigerant R410A

Safety During Installation/Servicing

Precautions for handling R410A refrigerant during installation and servicing.

Refrigerant Piping Installation

Guidelines for installing refrigerant piping using copper pipes and joints.

Piping Materials and Joints Used

Information on suitable copper pipes, flare joints, and socket joints for R410A.

Processing of Piping Materials

Steps and precautions for cutting, deburring, and flaring pipes.

Flare Processing Procedures and Precautions

Detailed dimensions and procedures for R410A flare processing.

Flare Connecting Procedures and Precautions

How to correctly connect flare joints and tightening torque values.

Required Tools

List of tools specifically required for R410A refrigerant handling and installation.

Construction Views

Indoor Unit Construction Views

Diagrams showing the dimensions and parts of the indoor unit.

Outdoor Unit Construction Views

Diagrams showing the dimensions and parts of the outdoor unit.

Wiring Diagram

Indoor Unit / Outdoor Unit Wiring Diagram

Schematic showing electrical connections between indoor and outdoor units.

Control Block Diagram

Indoor Unit Control Block Diagram

Diagram illustrating the control functions and signals within the indoor unit.

Outdoor Unit Control Block Diagram

Diagram showing the control functions and signals within the outdoor unit.

Operation Description

Outline of Air Conditioner Control

Overview of the air conditioner's control system and components.

Operation Control Flow

Detailed flow of operation control based on remote controller input and unit status.

Cooling/Heating Operation

How the unit operates in cooling and heating modes based on signals.

AUTO Operation

How the unit automatically selects operating mode based on room temperature.

DRY Operation

How the unit operates in DRY mode based on temperature difference.

Indoor Fan Motor Control

How the indoor fan speed is controlled in manual and auto modes.

Outdoor Fan Motor Control

How the outdoor fan speed is controlled based on compressor speed and temperature.

Capacity Control

How cooling/heating capacity is adjusted by compressor revolution based on temperature.

Current Release Control

Function to prevent inverter part troubles and control compressor speed.

Release Protective Control by Temperature of Indoor Heat Exchanger

Prevent-freezing control in cooling and prevent-overpressure control in heating.

Defrost Control (Only in Heating Operation)

How frost on the outdoor heat exchanger is removed using a 4-way valve.

Louver Control

How the indoor unit controls the louver position and swing for air direction.

ECO Operation

Energy-saving operation mode that adjusts temperature and compressor speed.

Temporary Operation

How to start/stop operation using the RESET button without the remote.

Discharge Temperature Control

How compressor speed is controlled based on discharge temperature to prevent errors.

Pulse Motor Valve (PMV) Control

How the PMV controls refrigerant flow based on super heat and discharge temperature.

Self-Cleaning Function

Operation to dry the indoor unit to prevent mold and bacteria growth.

Remote Controller-A or B Selection

How to set the remote controller to operate a specific indoor unit.

QUIET Mode

Operation that restricts indoor fan speed for quieter operation.

COMFORT SLEEP

Operation to save energy and improve comfort during sleep.

Short Timer

Purpose and setting of the short timer for unit testing or trial.

One Touch Comfort

Fully automated operation set according to regional preferences.

Hi POWER Mode

Operation mode for faster cooling by increasing fan speed and lowering temperature.

FILTER Indicator

Indicator for filter cleaning reminder and how to turn it off.

Auto Restart Function

How to set the unit to restart with previous settings after power failure.

Remote Controller and Its Functions

Explanation of remote controller buttons and their basic functions.

Operation of Remote Controller

How to use various functions like ONE-TOUCH, AUTO, and COOLING/HEATING.

Names and Functions of Indications on Remote Controller

Explanation of the display indicators and symbols on the remote controller.

Installation Procedure

Installation Diagram of Indoor and Outdoor Units

Visual guide showing the placement and connections for indoor and outdoor units.

Optional Parts, Accessories and Tools

List of optional parts, accessories, and tools required for installation.

Installation/Servicing Tools

Details on new tools required for R410A systems and their differences from R22.

Indoor Unit Installation Place

Criteria for selecting a suitable location for the indoor unit installation.

Cutting a Hole and Mounting Installation Plate

Procedures for cutting holes and mounting the indoor unit's installation plate.

Wiring Connection

Steps for connecting the power cord and connecting cable to the indoor unit.

How to Connect Remote Controller for Wire Operation

Instructions for connecting the remote controller via wire.

Piping and Drain Hose Installation

Guidance on forming and installing refrigerant pipes and drain hoses.

Outdoor Unit Installation Place

Criteria for selecting an appropriate location for the outdoor unit installation.

Refrigerant Piping Connection

How to flare pipes and connect them securely according to R410A specifications.

Evacuating

Procedure for removing air from the refrigerant pipes using a vacuum pump.

Wiring connection

Steps for connecting electrical wiring to the outdoor unit.

Gas Leak Test

How to check for refrigerant gas leaks after installation.

Remote Control A-B Selection

How to set remote control for multi-indoor unit systems.

Test Operation

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

Auto Restart Setting

How to set the unit to restart with previous settings after power failure.

How to Diagnose the Trouble

Troubleshooting Procedure

A table outlining the steps for diagnosing and troubleshooting unit issues.

Precautions when handling the new inverter (3DV Inverter)

Safety warnings and precautions for working with the inverter unit.

Precautions when inspecting the control section of the outdoor unit

Safety measures for inspecting the outdoor unit's control section, especially regarding high voltage.

First Confirmation

Initial checks for power supply and voltage before diagnosing issues.

Primary Judgment

Methods for initial troubleshooting, including LED indicators and symptoms.

Judgment by Flashing LED of Indoor Unit

Interpreting flashing LED codes on the indoor unit for self-diagnosis.

Self-Diagnosis by Remote Controller (Check Code)

How to use the remote controller in service mode to retrieve check codes for diagnosis.

Judgement of Trouble by Every Symptom

Troubleshooting flowcharts based on specific unit symptoms like no operation.

Wiring Failure (Interconnecting and Serial Signal Wire)

Diagnosing issues related to wiring faults between indoor and outdoor units.

Check Code 1C (Miswiring in indoor/outdoor units) and 1E

Specific check codes and procedures for miswiring and discharge temperature errors.

How to Diagnose Trouble in Outdoor Unit

Step-by-step guide for diagnosing problems within the outdoor unit.

How to Check Simply the Main Parts

Procedures for checking key components like P.C. boards and sensors.

How to Simply Judge Whether Outdoor Fan Motor is Good or Bad

Method to test the outdoor fan motor's functionality and diagnose potential errors.

How to Replace the Main Parts

Indoor Unit Parts Replacement

Procedures for disassembling and replacing parts of the indoor unit.

Electric parts box assembly

Steps to remove and install the indoor unit's electric parts box assembly.

Horizontal louver

Procedure for removing and installing the horizontal louver of the indoor unit.

Evaporator (Heat exchanger)

Steps for removing and installing the indoor unit's evaporator (heat exchanger).

Bearing

Procedure for removing and installing the bearing for the indoor unit fan.

Fan motor

Steps for removing and installing the indoor unit's fan motor.

Cross flow fan

Cautionary notes and procedures for reassembling the cross flow fan.

Outdoor Unit Parts Replacement

Procedures for disassembling and replacing parts of the outdoor unit.

Inverter assembly

Steps for removing and installing the outdoor unit's inverter assembly, including safety precautions.

Control-board assembly

Procedures for disconnecting and replacing the outdoor unit's control board assembly.

Side cabinet

Steps for removing and installing the right and left side cabinets of the outdoor unit.

Fan motor

Procedure for removing and installing the outdoor unit's fan motor.

Compressor

Steps for removing and installing the compressor, including refrigerant extraction.

Reactor

Procedure for removing the reactors from the outdoor unit.

Sensor Replacement

Instructions for installing temperature sensors (TE, TS, TD, TO) on the outdoor unit.

Exploded Views and Parts List

Indoor Unit Exploded View and Parts List

Detailed breakdown of indoor unit parts with corresponding part numbers.

Indoor Unit (Part-E) Exploded View and Parts List

Exploded view and parts list for specific indoor unit components.

Outdoor Unit Exploded View and Parts List

Detailed breakdown of outdoor unit parts with corresponding part numbers.

Outdoor P.C. Board Layout (RAS-18N3AV2-E)

Diagram showing the layout of the outdoor unit's P.C. board for a specific model.

Outdoor P.C. Board Layout (RAS-22N3AV2-E)

Diagram showing the layout of the outdoor unit's P.C. board for another specific model.

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