Important Safety Instructions
Read all instructions before using this appliance. Follow all safety precautions to reduce the risk of fire, electric shock, or injury.
- Always plug into a grounded 3-prong outlet. Do not remove the grounding prong.
- Do not use an adapter or extension cord.
- Do not operate any air conditioner with a damaged cord or plug.
- Do not block air openings.
- Do not use in wet areas.
- Refer to the installation instructions for proper window mounting.
Product Overview
The Keystone KSTAW10INV is a 10,000 BTU window-mounted inverter air conditioner designed for efficient cooling and dehumidification of rooms up to 450 square feet. It features inverter technology for energy efficiency and quiet operation, along with a remote control for convenient use.

Front view of the Keystone 10,000 BTU Window Mounted Inverter Air Conditioner, showing the control panel and air intake grille.
Key Features:
- 10,000 BTU Cooling Capacity: Effectively cools rooms up to 450 sq. ft.
- Inverter Technology: Provides energy-efficient and quiet operation.
- Dehumidification: Removes up to 1.4 pints of moisture per hour.
- Remote Control: Allows convenient adjustment of settings from a distance.
- Energy Saver Mode: Optimizes energy consumption.
- Sleep Mode: Adjusts temperature for comfortable sleep and energy savings.
- 24-Hour Timer: Programmable on/off times.
- Washable Filter: Easy to clean for maintaining efficiency.

Illustration highlighting the 3-in-1 technology: Powerful Cooling (10,000 BTU - 450 Sq. Ft.), Air Flow (3 Fan Speeds), and Dehumidification (1.4 Pints per Hour).
Setup and Installation
This section provides general guidelines for setting up your Keystone window air conditioner. For detailed instructions, refer to the included installation kit manual.
Choosing a Location:
- Install the unit in a window that is structurally sound and can support the unit's weight (approximately 53.1 lbs).
- Ensure the window opening is between 23 inches and 36 inches wide, and at least 19.5 inches tall.
- The unit requires a standard 115V/15A NEMA 5-15P plug. Ensure a compatible grounded outlet is nearby.

Diagram illustrating the compatible window width for installation (23-36 inches).
Installation Steps (Overview):
- Prepare the window by cleaning the sill and frame.
- Attach the top mounting rail to the unit.
- Place the unit in the window opening, ensuring it is securely seated.
- Extend the side panels to fill the window gap and secure them.
- Install the window sash seal and any additional sealing materials to prevent air leaks.
- Secure the unit to the window frame using the provided brackets and screws.
- Ensure the unit is slightly tilted outwards to allow for proper condensate drainage.

Image showing the included remote control, which allows for convenient operation from anywhere in the room.

Details of the NEMA 5-15P plug type (Standard 115V/15A) and 6.5 ft. LCDI cable length.
Operating Instructions
Your Keystone air conditioner offers various modes and settings for optimal comfort.
Control Panel and Remote:
The unit can be operated using the control panel on the front of the unit or the included remote control. The control panel features touch buttons for power, fan speed, mode selection, temperature adjustment, timer, and swing function. A digital display will show the current temperature and settings.
Official product video demonstrating the Keystone KSTAW10INV AC unit's features and operation.
Operating Modes:
- Cool Mode: Provides cooling to the set temperature. Adjust fan speed as desired.
- Fan Mode: Circulates air without cooling. Choose from multiple fan speeds.
- Dry (Dehumidify) Mode: Reduces humidity in the room.
- Auto Mode: Automatically selects cooling or fan mode based on the room temperature and set temperature.
- Heat Mode (if applicable): Provides supplemental heating. Note: Heat mode will not operate when outdoor temperature is below 41°F (5°C) and will display 'LO'. This unit is not intended as a primary heat source.
Special Functions:
- Energy Saver Mode: The fan will turn off when the compressor cycles off and turn on when the compressor cycles on.
- Sleep Mode: Gradually increases the set temperature over several hours to save energy and provide comfortable sleep.
- 24-Hour Timer: Program the unit to turn on or off automatically after a set period.
- Swing Function: Activates the automatic swing of the horizontal louvers to distribute air evenly.

Visual representation of the unit's energy efficiency and quiet operation, ideal for bedrooms.
Maintenance
Regular maintenance ensures optimal performance and longevity of your air conditioner.
Cleaning the Air Filter:
The "Check Filter" alert will illuminate after approximately 250 hours of operation. Clean the air filter every two weeks or when the "Check Filter" light appears.
- Turn off the unit and unplug it from the power outlet.
- Open the front panel of the unit.
- Grasp the handle of the filter and pull it out.
- Wash the filter using warm, soapy water. Rinse thoroughly.
- Allow the filter to dry completely before reinserting it. Do not use hot water or dry with direct heat.
- Once the filter is reinserted, plug in the unit and press the "Filter" button on the control panel or remote to reset the filter timer.

Close-up of a hand washing the washable removable filter under running water.
Cleaning the Unit:
- Wipe the cabinet with a soft, damp cloth.
- Do not use harsh chemicals or abrasive cleaners.
- Ensure the unit is unplugged before cleaning.
Seasonal Storage:
If storing the unit for an extended period, clean the filter and unit thoroughly. Cover the unit with plastic or cloth and store it in a dry, cool place.
Troubleshooting
Before contacting customer support, try these common troubleshooting steps.
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not turn on. | No power, tripped circuit breaker, unit unplugged. | Check power cord connection, reset circuit breaker, ensure outlet is functional. |
| Unit not cooling effectively. | Dirty air filter, blocked air intake/exhaust, room too large, open doors/windows. | Clean air filter, clear obstructions, ensure room size is within specifications, close doors/windows. |
| Unit is noisy. | Loose installation, fan obstruction, normal operating sounds. | Check installation for tightness, remove any obstructions, some sounds (e.g., refrigerant flow) are normal. |
| Water dripping outside. | Normal condensation drainage. | This is normal. Ensure unit is slightly tilted outwards for proper drainage. |
| Heat mode displays 'LO'. | Outdoor temperature is below 41°F (5°C). | Heat mode is designed for supplemental heating and will not operate below this temperature. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | KSTAW10INV |
| Cooling Capacity | 10,000 BTU |
| Power Supply | 115V, 60Hz |
| Coverage Area | Up to 450 Sq. Ft. |
| Dehumidification | 1.4 Pints/Hour |
| Noise Level | 51 dB |
| Product Dimensions (DxWxH) | 21.97" x 19.17" x 13.46" |
| Item Weight | 53.1 lbs |
| Energy Efficiency Ratio (CEER) | 14.5 |
| Plug Type | NEMA 5-15P |
| Cable Length | 6.5 ft. LCDI |

Image detailing the dimensions (19.17in W x 21.97in D x 13.46in H) and weight (54 lb) of the unit.
Warranty and Support
Keystone provides a 1-year limited warranty for this product. For warranty claims or technical assistance, please contact Keystone customer support.
- Warranty Description: 1 year limited (as per product specifications).
- Customer Support: Refer to the contact information provided in your product packaging or visit the official Keystone website.
- Online Resources: For additional support and FAQs, visit the Keystone Store on Amazon.





