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Table of Contents
- 1 Table of Contents
- 2 Functions
- 3 Product Specifications (Cooling & Heating)
- 4 Dimensions
- 5 Refrigeration Cycle Diagram
- 6 Wiring Diagram
- 7 Operation Details
- 8 Installation of Indoor, Outdoor Unit
- 9 3-Way Valve
- 10 Cycle Troubleshooting Guide
- 11 Electronic Parts Troubleshooting Guide
- 12 Electronic Control Device
- 13 Schematic Diagram
- 14 Exploded View and Replacement Parts List
- Download this manual
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Table of Contents
Troubleshooting
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Summarization of Contents
Functions of the Indoor Unit
Indoor Unit Functions Overview
Details various functions of the indoor unit, including operation control, temperature, fan speed, and special modes.
Unit Dimensions
Indoor Unit Dimensions
Provides detailed dimensional drawings and measurements for the indoor unit.
Outdoor Unit Dimensions (36K Models)
Provides dimensional drawings and measurements for the 36K model outdoor unit.
Outdoor Unit Dimensions (48K Models)
Provides dimensional drawings and measurements for the 48K model outdoor unit.
Wiring Diagrams
48K (3-Phase) Models Wiring
Electrical wiring diagrams for 48K 3-phase heat pump and cooling-only models.
36K (3-Phase) Models Wiring
Electrical wiring diagrams for 36K 3-phase heat pump and cooling-only models.
48K (1-Phase) Models Wiring
Electrical wiring diagrams for 48K 1-phase heat pump and cooling-only models.
Operation Details
Core Functions and Controls
Covers main control functions, modes (cooling, heating, defrost), safety, and troubleshooting diagnostics.
Installation Procedures
Unit Installation and Setup
Details location selection, mounting, ceiling openings, piping, wiring, and remote controller installation.
Wired Remote Control Installation
Disassembly, Wiring, and Wall Mounting
Steps for disassembling, wiring, and mounting the wired remote control unit.
Piping Connection and System Preparation
Pipe Preparation, Flaring, Vacuum Drying, and Connection
Covers pipe cutting, burr removal, flaring, vacuum drying, and connecting refrigerant lines.
Test Running and System Handover
Precautions, Checks, Performance Evaluation, and Customer Training
Details test run procedures, checks, performance evaluation, and handover instructions.
Optional Operation Modes
1. Two Thermistor System Configuration
Configuration for using two thermistors to control room temperature for enhanced comfort.
2. Adjusting Air Volume by Ceiling Height
How to adjust indoor fan speed based on ceiling height for optimal air distribution.
3. Group Control Wiring Setup
Instructions for setting up group control operation for multiple units using a single wired remote controller.
3-Way Valve Procedures
Pumping Down, Re-purging, and Refrigerant Balancing
Step-by-step guides for refrigerant handling using the 3-way valve system.
Cycle Troubleshooting Guide
Troubleshooting Refrigeration Cycle Issues
Guide for diagnosing problems related to temperature, pressure, and refrigerant levels.
Electronic Parts Troubleshooting Guide
Troubleshooting Unit Operation and Components
Diagnostic steps for common electronic issues like unit not operating, fan issues, or controller problems.
Electronic Control Device
Main PCB Assembly Diagram
Diagram of the main Printed Circuit Board (PCB) assembly, showing component layout and connections.
Exploded View and Replacement Parts List
Indoor Unit Parts Overview
Exploded view diagram for the indoor unit components.
Indoor Unit Parts List (Specific Models)
Detailed parts list for indoor units LT-D4882HL, LT-D4880HL, LT-D4880CL.
Indoor Unit Parts List (Specific Models)
Detailed parts list for indoor units LT-D3682HL, LT-D3680HL, LT-D3680CL.
Indoor Unit Parts List (Specific Models)
Detailed parts list for indoor units LT-D4820HL, LT-D4820CL.
Outdoor Unit Parts Overview
Outdoor Unit Parts (LT-D3680HL, LT-D3682HL, LT-D3680CL)
Exploded view diagram for outdoor units LT-D3680HL, LT-D3682HL, LT-D3680CL.
Outdoor Unit Parts List (Specific Models)
Parts list for outdoor units LT-D3680HL, LT-D3682HL, LT-D3680CL.
Outdoor Unit Parts (Specific Models)
Exploded view diagram for outdoor units LT-D4880CL, LT-D4880HL, LT-D4882HL, LT-D4820CL, LT-D4820HL.
Outdoor Unit Parts List (Specific Models)
Parts list for outdoor units LT-D4882HL, LT-D4880HL, LT-D4880CL.
Outdoor Unit Parts List (Specific Models)
Parts list for outdoor units LT-D4820HL, LT-D4820CL.
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