Installation Guide
Tools Needed:
- Vacuum pump with gauge manifold
- Refrigerant charging scale
- Flaring tool set
- Torque wrench
- Pipe cutter and reamer
- Multimeter
- Level
Step-by-Step Installation
- Select Installation Location: Choose a location with proper clearances (minimum 30cm from ceiling, 15cm from walls), away from heat sources and direct sunlight.
- Mount Indoor Unit Bracket: Securely mount the bracket to a solid wall using appropriate anchors and ensure it is perfectly level.
- Install Refrigerant Piping: Connect copper pipes between indoor and outdoor units using flare connections. Ensure pipes are properly insulated.
- Electrical Connections: Connect power supply wiring according to local electrical codes. Connect communication cable between indoor and outdoor units.
- Drainage Installation: Install drain hose with proper downward slope (minimum 1/100 gradient) to ensure proper condensation drainage.
- Vacuum and Leak Test: Evacuate the system using a vacuum pump for at least 15 minutes, then perform a leak test with nitrogen.
- Charge Refrigerant: Add the specified amount of R410A refrigerant according to pipe length using a charging scale.
- Test Operation: Power on the system and test all functions including cooling, heating, fan speeds, and remote control operation.
Specifications
| Model Series | MSZ-AP Series / MSY-AP Series |
| Type | Split System Air Conditioner |
| Cooling Capacity | 9,000 - 36,000 BTU/h |
| Heating Capacity | 10,000 - 40,000 BTU/h |
| Energy Efficiency Ratio (EER) | 12.5 - 15.0 |
| Seasonal Energy Efficiency Ratio (SEER) | 20.0 - 26.0 |
| Refrigerant Type | R410A |
| Power Requirements | 208-230V, 60Hz, 1 Phase |
| Operating Temperature Range | Cooling: 14°F to 115°F / Heating: -13°F to 75°F |
| Indoor Unit Noise Level | 19 - 38 dB(A) |
| Dimensions (Indoor Unit) | 28.7" x 11.8" x 8.7" (Wall Mount) |
| Airflow Volume | 294 - 1,060 CFM |
| Wi-Fi Connectivity | Built-in (Compatible with MELCloud App) |
Warranty Information
- Compressor Warranty: 7 years parts and labor
- Parts Warranty: 5 years on all other components
- Labor Coverage: 1 year installation labor
- Extended Warranty: Available up to 12 years total
For warranty service, contact Mitsubishi Electric at 1-800-433-4822 or visit MitsubishiComfort.com
Key Features
Inverter Technology
Advanced DC inverter compressor adjusts speed continuously to maintain precise temperature control, reducing energy consumption by up to 40% compared to conventional systems.
Hyper-Heating INVERTER®
Provides 100% heating capacity even at -13°F outdoor temperatures, ensuring consistent comfort in extreme winter conditions.
3D i-See Sensor™
Intelligent infrared sensors detect human presence and movement, automatically directing airflow to occupied areas while avoiding direct draft on occupants.
Quiet Operation
Sound levels as low as 19 dB in quiet mode - quieter than a whisper. Special noise reduction technologies ensure minimal disturbance.
MELCloud Connectivity
Wi-Fi enabled for remote control via smartphone app, allowing scheduling, energy monitoring, and control from anywhere with internet access.
Air Purification
Multi-stage filtration system including plasma quad filter that removes up to 99% of airborne particles, allergens, and odors.
Advanced Operation Modes
Auto Changeover
Automatically switches between heating and cooling based on room temperature for year-round comfort
Eco Mode
Optimizes operation for maximum energy savings while maintaining comfort levels
Powerful Mode
Rapid cooling or heating for quick temperature recovery when entering a room
Quiet Mode
Reduces fan speed and compressor operation for ultra-quiet nighttime operation
I-Feel Control
Uses remote control as temperature sensor for precise comfort where you are
Follow Me Function
Directs airflow to follow movement in the room using intelligent sensors
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit not turning on | Power failure, circuit breaker tripped, remote control batteries dead | Check power supply, reset circuit breaker, replace remote batteries |
| Poor cooling/heating | Dirty filters, blocked airflow, refrigerant leak, outdoor unit obstruction | Clean filters, clear obstructions, check refrigerant charge, clear outdoor unit area |
| Water leakage | Clogged drain pipe, improper installation slope, frozen evaporator | Clear drain line, ensure proper slope, check for ice formation |
| Unusual noises | Loose parts, debris in fan, vibration from mounting | Tighten all fasteners, clear debris, check mounting stability |
| Remote control not working | Dead batteries, signal obstruction, remote sensor issue | Replace batteries, ensure line of sight, check indoor unit sensor |
| Error code displayed | System malfunction, sensor failure, communication error | Note error code and refer to service manual, contact technician |
Common Error Codes
- P1/P2: Power supply abnormality - Check voltage and wiring
- E1/E2: Communication error between units - Check wiring connections
- F1/F2: Indoor temperature sensor error - Replace sensor
- H1/H2: Compressor overload protection - Check for restrictions, wait 3 minutes
- J1/J2: Refrigerant pressure abnormality - Check for leaks or restrictions
- U1/U2: Power module error - Contact service technician
- L5: Inverter compressor error - System shutdown required
Manual Downloads
Wall Mounted Series
MSZ-AP09NA
9,000 BTU Hyper-Heat
MSZ-AP12NA
12,000 BTU Hyper-Heat
MSZ-AP18NA
18,000 BTU Hyper-Heat
MSZ-AP24NA
24,000 BTU Hyper-Heat
Ceiling Cassette Series
MLZ-AP18NA
18,000 BTU 4-Way Cassette
MLZ-AP24NA
24,000 BTU 4-Way Cassette
MLZ-AP30NA
30,000 BTU 4-Way Cassette
MLZ-AP36NA
36,000 BTU 4-Way Cassette
Multi-Zone Systems
MXZ-SM36NAM
36,000 BTU Multi-Zone
MXZ-SM48NAM
48,000 BTU Multi-Zone
MXZ-SM60NAM
60,000 BTU Multi-Zone
PUMY-P60NKMU
60,000 BTU Heat Pump