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SERVICE MANUAL
AIR-CONDITIONER
RAS-10YK-ES / RAS-10YA-ES
RAS-10YK-HX / RAS-10YA-HX
SPLIT WALL TYPE
RAS-07YKX / RAS-07YAX
RAS-10YKX / RAS-10YAX
RAS-11YKX / RAS-11YAX
RAS-07YK-E / RAS-07YA-E
RAS-10YK-E / RAS-10YA-E
RAS-07YK-ES/RAS-07YA-ES
RAS-07YKX-T / RAS-07YAX-T
RAS-10YKX-T / RAS-10YAX-T
FILE NO. DAS-SM-00-001

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Table of Contents
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Summarization of Contents

2. CONSTRUCTION VIEWS
2-1. Indoor Unit
Detailed diagrams illustrating the physical components and dimensions of the indoor unit.
2-2. Outdoor Unit
Detailed diagrams illustrating the physical components and dimensions of the outdoor unit.
4. SPECIFICATIONS OF ELECTRICAL PARTS
4-1. Indoor Unit Electrical Parts
Lists and specifications for electrical components used in the indoor unit.
4-2. Outdoor Unit Electrical Parts
Lists and specifications for electrical components used in the outdoor unit.
7. OPERATION DESCRIPTIONS
7-1. FAN ONLY Operation
Details on how the unit operates in FAN ONLY mode, including fan speed control.
7-2. COOL Operation
Describes the cooling mode operation, including compressor and fan control logic.
7-3. DRY Operation
Explains the unit's operation during dehumidification (DRY mode), including compressor cycling.
7-4. AUTO Operation
Outlines the automatic mode where the unit selects cooling or dry based on room conditions.
7-5. ECONO. Mode and Low-Temperature Limit Control
Details energy-saving mode and protection against indoor heat exchanger freezing.
7-7. Auto Restart Function
Describes the function that resumes operation after a power interruption.
8. INSTALLATION PROCEDURE
8-1. Safety Cautions
Critical safety warnings and precautions to be observed during installation.
8-2. Installation Diagrams and Parts
Visual guides for unit placement, connection, and lists of required installation parts.
8-3. Indoor Unit Installation Steps
Step-by-step procedures for installing the indoor unit, including electrical and piping.
8-4. Drainage and Outdoor Unit Installation
Instructions for proper drainage and placement/installation of the outdoor unit.
9. TROUBLESHOOTING CHART
9-1. What to be Prechecked First
Initial checks for common issues before detailed troubleshooting.
9-2. Primary Judgement of Trouble Sources
Guidance on identifying the source of malfunctions based on symptoms and block displays.
9-3. Troubleshooting Flowcharts
Diagnostic flowcharts for various operational failures, like power issues or component malfunctions.
9-4. Remote Control Troubleshooting
Procedures for diagnosing and checking the remote control and indoor P.C. board.
10. PART REPLACEMENT
10-1. Indoor Unit Part Replacement
Procedures for replacing components within the indoor unit.
10-2. Microcomputer Part Replacement
Steps for replacing the microcomputer assembly and related parts.
10-3. Outdoor Unit Part Replacement
Procedures for replacing components within the outdoor unit.
11. EXPLODED VIEWS AND PARTS LIST
11-1. Indoor Unit Views and Parts
Exploded diagrams and part numbers for the indoor unit assembly.
11-2. Outdoor Unit Views and Parts
Exploded diagrams and part numbers for the outdoor unit assembly.

Table of Contents