Installation Guide
Tools Needed:
- Screwdrivers (flat and Phillips)
- Drill with bits
- Level
- Tape measure
- Utility knife
- Support bracket (if required)
Step-by-Step Installation
- Choose Installation Location: Select a window that can support the unit's weight and has access to a dedicated electrical outlet.
- Prepare Window Area: Clean the window sill and ensure it's level. Remove any obstructions from the installation area.
- Install Support Bracket: For heavier units, install the support bracket according to manufacturer instructions.
- Mount Side Panels: Install the side panels to fill gaps between the unit and window frame.
- Place Air Conditioner: Carefully lift and place the unit in the window opening, ensuring it tilts slightly outward for proper drainage.
- Secure the Unit: Extend the window mounting panels and secure them to the window frame using provided screws.
- Seal Gaps: Use weather stripping to seal any gaps between the unit and window frame to prevent air leaks.
- Electrical Connection: Plug into a dedicated 115V, 15-amp grounded outlet. Do not use extension cords.
- Test Operation: Turn on the unit and test all functions including cooling, fan, and thermostat.
Specifications
| Model Series | MW12HR |
| Type | Window Air Conditioner |
| Color | White |
| Cooling Capacity | 12,000 BTU/h |
| Room Coverage | Up to 550 sq. ft. |
| Noise Level | 52 dB (Low) / 58 dB (High) |
| Control Type | Electronic with Remote Control |
| Energy Efficiency Ratio (EER) | 12.1 |
| Power Requirements | 115V, 60Hz, 15A |
| Dimensions (HxWxD) | 15.5 x 23.6 x 19.7 inches |
| Weight | 68 lbs |
| Refrigerant | R-410A |
| Air Flow (CFM) | 350 |
Warranty Information
- Full Warranty: 1 year parts and labor
- Compressor Warranty: 5 years
- Sealed System: 5 years
For warranty service, contact Mitsubishi Customer Service at 1-800-433-4822 or visit MitsubishiComfort.com
Key Features
Inverter Technology
Advanced inverter compressor adjusts cooling power to maintain consistent temperature, reducing energy consumption by up to 40% compared to conventional units.
8-Way Air Direction
Adjustable louvers provide 8-way air deflection for optimal air distribution throughout the room, eliminating hot spots.
Sleep Mode
Automatically adjusts temperature and fan speed for comfortable sleeping conditions while saving energy.
Auto Restart
Automatically resumes previous settings after a power outage, maintaining your comfort preferences.
Dehumidification Mode
Removes excess moisture from the air without overcooling the room, perfect for humid climates.
Energy Saver Mode
Automatically turns off the fan when the desired temperature is reached, saving energy while maintaining comfort.
Operating Modes Explained
Cool Mode
Standard cooling operation with adjustable temperature settings from 64°F to 86°F
Dry Mode
Dehumidifies air while providing minimal cooling, ideal for rainy seasons
Fan Only
Circulates air without cooling, with multiple fan speed options
Auto Mode
Automatically selects cooling or fan operation based on room temperature
Energy Saver
Optimizes operation for maximum energy efficiency
Sleep Mode
Gradually adjusts temperature for comfortable sleeping conditions
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit doesn't turn on | Power issue, circuit breaker tripped, faulty outlet | Check power cord connection, reset circuit breaker, test outlet |
| Poor cooling performance | Dirty filter, blocked airflow, low refrigerant | Clean or replace filter, clear obstructions, contact technician |
| Water leaking inside | Unit not tilted properly, drain hole clogged | Ensure unit tilts slightly outward, clean drain hole |
| Unusual noises | Loose parts, debris in fan, compressor issue | Check for loose screws, clean fan blades, contact service |
| Unit cycles on/off frequently | Dirty filter, thermostat issue, oversized for room | Clean filter, check thermostat settings, ensure proper sizing |
| Remote control not working | Dead batteries, signal obstruction, remote damage | Replace batteries, clear line of sight, check remote |
Error Codes
- E1: Room temperature sensor error - Check sensor connection
- E2: Evaporator temperature sensor error - Contact service
- E3: Communication error - Check wiring connections
- E4: Outdoor temperature sensor error - Contact service
- E5: Overcurrent protection - Check electrical supply
- E6: Compressor overload - Allow unit to cool down
- P1: High pressure protection - Clean condenser coils
- P2: Low pressure protection - Contact service technician
Manual Downloads
Current Model Manuals
MW12HR
12,000 BTU Window AC
MW08HR
8,000 BTU Window AC
MW18HR
18,000 BTU Window AC
MW24HR
24,000 BTU Window AC
Popular Previous Models
MW10C
10,000 BTU Window AC
MW14C
14,000 BTU Window AC
MW08E
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12,000 BTU Energy Star