1. Introduction
The Colku LT20A is a versatile and efficient roof-mounted air conditioner designed for a wide range of vehicles including motorhomes, RVs, trucks, vans, loaders, excavators, and cranes. This DC inverter air cooler provides powerful cooling with a high efficiency ratio, utilizing a rotary DC inverter compressor and R410A refrigerant for optimal performance and environmental protection. Its unique anti-shock structure ensures a quiet and comfortable environment.
2. Specifications
The Colku LT20A air conditioner is engineered for robust performance and durability. Below are the detailed specifications:
| Feature | Specification |
|---|---|
| Model | LT20A |
| Cooling Capacity | 1500W |
| Input Voltage | 12V DC, 24V DC, 220V AC (via inverter) |
| Refrigerant | R410a / 400g |
| Operating Temperature | 16-43℃ |
| Current (DC) | Approx. 50A (12V), 20-35A (24V) |
| Evaporator Air Volume | 300m³/h |
| Setting Temperature Range | 15-30℃ |
| Product Dimensions (L*W*H) | 880mm * 783mm * 310mm |
| Net Weight | 29kg |
| Gross Weight (with package) | 35kg |
| Warranty | 1 Year / 12 Months |
| Place of Origin | Guangdong, China |
3. Components Overview
The Colku LT20A air conditioner consists of several key components working in harmony to provide efficient cooling. Understanding these parts is crucial for installation and maintenance.
3.1 Main Components
- Rotary DC Inverter Compressor: Jointly developed with GMCC, this core component provides efficient and powerful cooling with an EER of 2.7.
- R410A High Efficiency Refrigerant: An innovative and ozone-friendly refrigerant for superior cooling performance.
- Unique Anti-shock Structure: Features a damping spring device to effectively reduce noise caused by compressor vibration, ensuring a quiet operation.
- High-efficient Condenser & Evaporator: Optimized design for maximum heat exchange. Condenser size: 535mm*333mm*17mm. Evaporator size: 355mm*145mm*50mm.
- Upgraded Condenser Cooling Fan: A larger fan to quickly dissipate heat from the condenser, improving cooling efficiency.
3.2 Exploded View and Parts List
| No. | Part Name | No. | Part Name |
|---|---|---|---|
| 1 | Body Cover | 2 | Evaporator Foam Cover |
| 3 | Evaporator Plastic Cover | 4 | Condenser Cooling Fan |
| 5 | Condenser | 6 | Evaporator |
| 7 | Evaporator Fan | 8 | Bottom Base |
| 9 | Inner Trim | 10 | Strainer Mesh |
| 11 | Control PCB | 12 | Air Vent |
| 13 | EVA Sealing Strip | 14 | Filter Drier |
| 15 | High/low Pressure Pipe | 16 | Capillary |
| 17 | Compressor Mounting Spring | 18 | DC Rotor Compressor |
| 19 | Remote Control | 20 | Controller |
3.3 Accessories
4. Installation
Proper installation is critical for the performance and longevity of your Colku air conditioner. It is highly recommended to have the unit installed by a qualified professional.
4.1 Applicable Vehicles
4.2 Special Mounting Units
For certain vehicle models, special mounting units are available to ensure a perfect fit and secure installation.
4.3 Step-by-Step Installation Guide
The following steps outline the general installation process. Always refer to the detailed instructions provided with your specific model and consult a professional installer.
- Remove Sunroof: Carefully remove the existing sunroof and thoroughly clean the area.
- Apply Sealant: Paste the provided sealant around the edge of the opening.
- Apply Adhesive: Apply glass adhesive over the sealant to ensure a watertight seal.
- Fix Base Plate Nuts: Secure the nuts into the holes of the base plate.
- Insert Air Outlet: Carefully place the air outlet unit into the sunroof opening.
- Secure Air Outlet: Fix the air outlet securely in the cab using screws.
- Install Mounting Panel: Install the interior mounting panel with screws.
- Connect Power: Connect the power cord to the vehicle's battery, ensuring correct polarity and secure connections.
5. Operation
The Colku LT20A air conditioner is designed for user-friendly operation via its integrated control panel and remote control.
5.1 Control Panel
The indoor unit features a digital display showing temperature and operational status, along with controls for power, temperature adjustment, and fan speed. Three adjustable air vents allow for directional airflow.
5.2 Temperature and Fan Speed Adjustment
- Power On/Off: Use the power button on the control panel or remote to turn the unit on or off.
- Temperature Setting: Adjust the desired temperature within the range of 15-30℃ using the temperature controls.
- Fan Speed: Select from multiple fan speed settings to control airflow.
5.3 Battery Protection System (for 24V DC models)
The unit includes a battery protection system with 10 adjustable gears to prevent complete depletion of your vehicle's battery. This feature is particularly useful for parking and extended use.
| Gear | Voltage (V) | Gear | Voltage (V) |
|---|---|---|---|
| B1 | 21.5 | B6 | 22.5 |
| B2 | 21.7 | B7 | 22.7 |
| B3 | 21.9 | B8 | 22.9 |
| B4 | 22.1 | B9 | 23.1 |
| B5 | 22.3 | B10 | 23.3 |
6. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your air conditioner.
6.1 Filter Screen Cleaning
The air conditioner features an easily removable filter screen that does not require screws for access, making cleaning simple.
- Removal: Gently pull the filter screen out from its slot.
- Cleaning: Wash the filter screen with mild soap and water. Rinse thoroughly and allow it to dry completely before reinserting.
- Frequency: Clean the filter screen regularly, especially in dusty environments, to maintain good airflow and cooling efficiency.
6.2 General Cleaning
- Exterior: Wipe the exterior surfaces of the unit with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Condenser Coils: Periodically inspect the outdoor condenser coils for dirt and debris. If necessary, gently clean them with a soft brush or vacuum cleaner.
7. Troubleshooting
If you encounter issues with your Colku air conditioner, refer to the following common troubleshooting tips. For complex problems, contact professional service.
- No Power: Check battery connections, vehicle's fuse box, and ensure the unit is properly connected to a power source. Verify battery voltage is above the set protection level.
- Weak Cooling: Ensure the filter screen is clean. Check for any obstructions to the outdoor condenser or indoor air vents. Verify the temperature setting is appropriate.
- Unusual Noise: Check if the unit is securely mounted. Inspect for any loose parts or debris in the fan area.
- Water Leakage: Ensure the unit is level and the drainage system is not blocked.
8. User Tips
- Battery Monitoring: Regularly monitor your vehicle's battery voltage, especially when using the air conditioner for extended periods, to prevent deep discharge. Adjust the battery protection gear as needed.
- Optimal Airflow: Keep the indoor air vents clear of obstructions to ensure maximum cooling efficiency.
- Pre-Cooling: If possible, pre-cool your vehicle before parking in extreme heat to reduce the initial load on the air conditioner.
- Professional Installation: While DIY installation might seem feasible, professional installation ensures safety, proper sealing, and optimal performance, especially for complex wiring or vehicle modifications.
9. Warranty and Support
The Colku LT20A air conditioner comes with a 1-year (12-month) warranty from the date of purchase, covering manufacturing defects. For warranty claims, technical support, or any inquiries, please contact your seller or authorized service center with your purchase details.
