Toshiba RAS-18N3KV2-E User Manual

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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Toshiba RAS-18N3KV2-E Specifications

General

Cooling Capacity	5.0 kW
Energy Efficiency Ratio (EER)	3.21
Coefficient of Performance (COP)	3.61
Refrigerant	R32
Power Supply	220-240V, 50Hz
Outdoor Unit Dimensions (WxHxD)	780 x 550 x 290 mm
Indoor Unit Weight	13 kg
Outdoor Unit Weight	35 kg
Type	Split System
Outdoor Unit Noise Level	52 dB(A)

Summary

1. Safety Precautions

New refrigerant air conditioner installation

Precautions for R410A refrigerant systems and installation.

DANGER Statements

Critical safety warnings about severe injury or death.

WARNING Statements

Safety warnings about severe injury or death.

CAUTION Statements

Safety warnings about personal injury or property damage.

2. Specifications

Specifications Table

Detailed specifications for indoor and outdoor units, capacities, power, etc.

Operation Characteristic Curve

Capacity Variation Ratio According to Temperature

3. Refrigerant R410A

Safety During Installation/Servicing

Safety precautions specific to R410A refrigerant handling.

Refrigerant Piping Installation

Guidelines for installing R410A refrigerant piping.

Piping Materials and Joints Used

Processing of Piping Materials

Flare Connecting Procedures and Precautions

Tightening Torque for Flare Connections

3-3. Tools

Required Tools for R410A

Lists tools exclusive for R410A installation.

3-4. Recharging of Refrigerant

Recharging Procedure

Step-by-step guide for recharging refrigerant.

5. Wiring Diagram

5-1. Indoor Unit / Outdoor Unit

Wiring diagram for both indoor and outdoor units.

7. Refrigerant Cycle Diagram

7-1. Refrigerant Cycle Diagram

Diagram illustrating the refrigerant flow for specific models.

7-1. Refrigerant Cycle Diagram (Different Models)

Diagram illustrating the refrigerant flow for different models.

8. Control Block Diagram

8-1. Indoor Unit Control

Block diagram of the indoor unit's control system.

8-2. Outdoor Unit Control

Block diagram of the outdoor unit's control system.

9. Operation Description

9-1. Outline of Air Conditioner Control

Overview of the air conditioner's control system.

9-2. Operation Description

Detailed description of various operational modes and functions.

1. Basic operation

2. Cooling/Heating operation

3. AUTO operation

4. DRY operation

2. Indoor fan motor control

2. Indoor fan motor control (Cooling operation)

2. Indoor fan motor control (Heating operation)

3. Outdoor fan motor control

4. Capacity control

5. Current release control

6. Release protective control by temperature of indoor heat exchanger

Protective control based on indoor heat exchanger temperature.

7. Defrost control (Only in heating operation)

Function to remove frost from the outdoor heat exchanger.

8. Louver control

9. ECO operation

11. Discharge temperature control

12. Pulse motor valve (PMV) control

13. Self-Cleaning function

9-3. Auto Restart Function

9-3-1. How to Set the Auto Restart Function

Procedure to set the automatic restart function.

9-3-2. How to Cancel the Auto Restart Function

Procedure to cancel the automatic restart function.

9-4. Remote control

9-4-1. Remote Controller and Its Functions

Identification and function of remote controller buttons.

9-4-2. Operation of remote control

10. AUTO RESTART OPERATION

9-4-3. Names and Functions of Indications on Remote Controller

10. Installation Procedure

10-1. Installation Diagram of Indoor and Outdoor Units

Diagram showing indoor/outdoor unit installation layout.

10-2-3. Installation/Servicing Tools

10-3. Indoor Unit

10-3-1. Installation Place

Recommended location for installing the indoor unit.

10-3-2. Cutting a Hole and Mounting Installation Plate

10-3-1. Installation Place (continued)

More details on indoor unit installation location.

10-3-2. Cutting a Hole and Mounting Installation Plate (continued)

10-3-3. Wiring Connection

Instructions for connecting the indoor unit wiring.

10-3-4. How to Connect Remote Controller for Wire Operation

10-3-4. How to Connect Remote Controller for Wire Operation (Indoor unit)

10-3-4. How to Connect Remote Controller for Wire Operation (Remote controller)

10-3-5. Piping and drain hose installation

10-3-5. Piping and drain hose installation (continued)

10-4. Outdoor Unit

10-4-1. Installation place

Recommended locations for outdoor unit installation.

10-4-2. Precautions about installation in regions with snowfall and cold temperatures

10-4-1. Installation place (continued)

10-4-3. Refrigerant piping connection

10-4-3. Refrigerant piping connection (Flaring)

10-4-4. Evacuating

10-4-5. Wiring connection

10-4-6. Electrical Work

11. How to Diagnose the Trouble

Precautions when handling the new inverter (3DV Inverter)

Safety precautions for handling the inverter.

Precautions when inspecting the control section of the outdoor unit

Safety precautions for inspecting the outdoor unit's control section.

11-1. First Confirmation

11-2. Primary Judgment

Methods for initial trouble diagnosis.

11-3. Judgment by Flashing LED of Indoor Unit

Diagnosing issues based on indoor unit LED flashing codes.

11-4. Self-Diagnosis by Remote Controller (Check Code)

Using the remote controller for self-diagnosis with check codes.

11-4-1. How to Use Remote Controller in Service Mode

Steps to enter service mode on the remote controller.

11-4-2 Caution at Servicing

11-4-2 Caution at Servicing (continued)

11-5. Judgement of Trouble by Every Symptom

Diagnosing problems based on symptoms.

11-5-1. Indoor unit (Including remote controller)

Troubleshooting for indoor unit operation issues.

11-5-1. Indoor unit (Including remote controller) (continued)

Troubleshooting for indoor unit operation issues.

(3) Only the indoor motor fan does not operate

Troubleshooting guide for indoor fan motor failure.

(3) Only the indoor motor fan does not operate (continued)

Troubleshooting guide for indoor fan motor failure.

(4) Indoor fan motor automatically starts to rotate by turning on power supply

(5) Troubleshooting for remote controller

Troubleshooting steps for remote controller issues.

(5) Troubleshooting for remote controller (continued)

Troubleshooting steps for remote controller issues.

11-5-2. Wiring Failure (Interconnecting and Serial Signal Wire)

Diagnosing issues related to wiring failures.

11-5-2. Wiring Failure (Interconnecting and Serial Signal Wire) (1) Outdoor unit does not operate

Troubleshooting outdoor unit operation due to wiring.

11-5-2. Wiring Failure (Interconnecting and Serial Signal Wire) (2) Outdoor unit stops in a little while after operation started

Troubleshooting outdoor unit stopping after startup.

11-6. Check Code 1C (Miswiring in indoor/outdoor units) and 1E

Procedure for diagnosing check code 1C (miswiring) and 1E.

11-7. How to Diagnose Trouble in Outdoor Unit

Troubleshooting for outdoor unit power and components.

Troubleshooting Outdoor Fan and Compressor Operation

Diagnosing outdoor fan and compressor operation.

11-8. How to Check Simply the Main Parts

11-8-1. How to check the P.C. board (Indoor unit)

Steps to check the indoor unit's P.C. board.

11-8-2. How to shorten time for start the compressor

11-8-2. P.C. Board Layout

11-8-3. Indoor Unit (Other Parts)

11-8-4. Outdoor Unit

11-8-5. Checking Method for Each Part

11-9. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad

Troubleshooting Outdoor Fan Motor

Steps to diagnose outdoor fan motor issues.

12. How to Replace the Main Parts

10-1. Indoor Unit

10-1. Indoor Unit - Front Panel Replacement

10-1. Indoor Unit - Electric Parts Box Assembly Replacement

10-1. Indoor Unit - Evaporator (Heat Exchanger) Replacement

10-1. Indoor Unit - Evaporator (Heat Exchanger) Replacement (cont.)

10-1. Indoor Unit - Fan motor Replacement

12-3. Outdoor Unit

12-3. Outdoor Unit - Common procedure: Detachment

12-3. Outdoor Unit - Common procedure: Attachment

12-3. Outdoor Unit - Front cabinet Replacement

12-3. Outdoor Unit - Inverter assembly Replacement

12-3. Outdoor Unit - Control-board assembly Replacement

12-3. Outdoor Unit - Side cabinet Replacement

12-3. Outdoor Unit - Fan motor Replacement

12-3. Outdoor Unit - Compressor Replacement

Steps to replace the compressor.

12-3. Outdoor Unit - Electronic expansion valve coil Replacement

13. Exploded Views and Parts List

13-1. Indoor Unit

Exploded view and parts list for the indoor unit.

13-1. Indoor Unit (Detailed Parts)

Detailed parts list for the indoor unit.

13-2. Indoor Unit (Part-E)

13-3. Outdoor Unit

Exploded view and parts list for the outdoor unit.

13-4. P.C. Board Layout (Outdoor)

13-5. P.C. Board Layout (Outdoor)