Installation Guide
Tools Needed:
- Phillips screwdriver
- Level
- Tape measure
- Drill with bits
- Saw (for cutting window frame if needed)
- Support bracket
Step-by-Step Installation
- Choose Installation Location: Select a window that can support the unit's weight and is near an electrical outlet. Ensure proper clearance around the unit.
- Prepare Window Area: Clean the window sill and remove any obstructions. Measure the window opening to ensure proper fit.
- Install Support Bracket: Securely mount the support bracket to the window sill or wall according to manufacturer specifications.
- Position the Unit: Carefully lift the air conditioner into the window opening, resting it on the support bracket.
- Secure the Unit: Extend the side panels to fill the window gap and secure them with screws. Install the locking bracket to prevent movement.
- Seal the Gaps: Apply weather stripping around the unit to prevent air leaks and improve efficiency.
- Electrical Connection: Plug into a dedicated 115V, 15A grounded outlet. Do not use extension cords or power strips.
- Test Operation: Turn on the unit and test all functions including cooling, fan speeds, and thermostat settings.
Specifications
| Model Series | MWAC-12000 |
| Type | Window Air Conditioner |
| Color | White |
| Cooling Capacity | 12,000 BTU/h |
| Room Coverage | Up to 550 sq. ft. |
| Noise Level | 52 dB (Low) / 62 dB (High) |
| Control Type | Electronic Controls with Digital Display |
| Energy Rating | Energy Star Certified |
| Power Requirements | 115V, 60Hz, 12A |
| Dimensions (HxWxD) | 16.5 x 25.5 x 21.5 inches |
| Weight | 78 lbs |
| Refrigerant | R-410A |
| Air Flow (CFM) | 350 CFM |
Warranty Information
- Full Warranty: 1 year parts and labor
- Compressor Warranty: 5 years on sealed system
- Additional Coverage: Optional extended warranty available
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 output to maintain consistent temperature while reducing energy consumption by up to 40% compared to conventional units.
Sleep Mode
Automatically adjusts temperature throughout the night for optimal comfort and energy savings while you sleep.
Dehumidification Mode
Removes excess moisture from the air without overcooling the room, perfect for humid climates.
Auto Restart
Automatically resumes previous settings after a power outage, ensuring continuous comfort.
Multi-Speed Fan
Three fan speeds (Low, Medium, High) plus Auto mode for customized airflow and comfort control.
Washable Filter
Easy-to-clean air filter captures dust and allergens, improving indoor air quality and system efficiency.
Operating Modes
Cool Mode
Standard cooling operation with adjustable temperature settings from 64°F to 86°F
Energy Saver
Reduces energy consumption by cycling the fan with the compressor
Fan Only
Circulates air without cooling, perfect for mild weather
Dry Mode
Dehumidifies the air while maintaining comfortable temperature
Auto Mode
Automatically selects cooling or fan operation based on room temperature
Turbo Cool
Maximum cooling power for quick temperature reduction
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit not turning on | Power issue, circuit breaker tripped, thermostat setting | Check power cord connection, reset circuit breaker, adjust thermostat |
| Poor cooling performance | Dirty filter, blocked airflow, low refrigerant | Clean air filter, clear obstructions, contact service technician |
| Water leaking inside room | Improper installation, clogged drain, unit not level | Check installation angle, clear drain holes, ensure unit is level |
| Unusual noises | Loose parts, debris in fan, compressor issue | Tighten mounting screws, clear debris, contact service if persistent |
| Unit cycles on and off frequently | Dirty filter, thermostat location, oversized for room | Clean filter, relocate thermostat, ensure proper sizing |
| Frozen coils | Dirty filter, low refrigerant, restricted airflow | Clean filter, turn unit off to defrost, check for obstructions |
Error Codes
- E1: Room temperature sensor error - Check sensor connection
- E2: Evaporator temperature sensor error - Contact service
- E3: Communication error - Power cycle unit
- E4: Outdoor temperature sensor error - Check installation environment
- 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 - Check for refrigerant leak
Manual Downloads
Current Model Manuals
MWAC-12000
12,000 BTU Window AC
MWAC-10000
10,000 BTU Window AC
MWAC-8000
8,000 BTU Window AC
MWAC-18000
18,000 BTU Window AC
Popular Previous Models
MSZ-12000
12,000 BTU Inverter AC
MFZ-10000
10,000 BTU Window Unit
MSY-08000
8,000 BTU Energy Star
MLZ-15000
15,000 BTU Heavy Duty