Installation Guide
Tools Needed:
- Refrigeration manifold gauge set
- Vacuum pump
- Torque wrench
- Pipe cutter and flaring tool
- Multimeter
- Level
- Drill with hole saw attachment
Step-by-Step Installation
- Site Selection: Choose appropriate location for outdoor unit with proper clearance and indoor unit with accessible ductwork connections.
- Mounting: Securely mount indoor and outdoor units using appropriate brackets and vibration dampeners.
- Refrigerant Piping: Install copper refrigerant lines with proper insulation. Ensure lines are properly flared and connected.
- Electrical Connection: Connect to dedicated circuit with proper voltage (208-230V). Follow local electrical codes and manufacturer specifications.
- Ductwork Connection: Connect supply and return ducts to indoor unit. Ensure proper sealing and insulation.
- Drain Line Installation: Install condensate drain line with proper slope and trap. Connect to appropriate drainage system.
- Vacuum and Charge: Evacuate system to proper vacuum level (500 microns or less) and charge with specified refrigerant amount.
- System Test: Test all functions including cooling, heating, fan speeds, and thermostat operation.
Specifications
| Model Series | FDXM / RXM Series |
| Type | Inverter Ducted Split System |
| Cooling Capacity | 2.5 - 7.5 kW |
| Heating Capacity | 2.8 - 8.0 kW |
| Energy Efficiency Ratio (EER) | 3.5 - 4.2 |
| Seasonal Energy Efficiency Ratio (SEER) | 18 - 22 |
| Heating Seasonal Performance Factor (HSPF) | 9.0 - 10.5 |
| Refrigerant Type | R-410A |
| Power Requirements | 208-230V, 60Hz, 1 Phase |
| Maximum Current | 15 - 30A |
| Indoor Unit Noise Level | 19 - 38 dB(A) |
| Outdoor Unit Noise Level | 49 - 58 dB(A) |
| Operating Temperature Range | -15°C to 46°C (Cooling) / -20°C to 24°C (Heating) |
Warranty Information
- Compressor Warranty: 5 years parts and labor
- Parts Warranty: 5 years on all parts
- Extended Warranty: Optional extended coverage available up to 10 years
For warranty service, contact Daikin Customer Service at 1-866-432-5464 or visit Daikin.com
Key Features
Inverter Technology
Daikin's advanced inverter technology adjusts compressor speed to match cooling/heating demand, providing precise temperature control and significant energy savings.
Intelligent Eye
Built-in motion sensor detects room occupancy and adjusts operation to save energy when rooms are unoccupied, then returns to set temperature when movement is detected.
Coanda Airflow
Advanced airflow design distributes air evenly throughout the room without creating uncomfortable drafts, ensuring consistent temperature distribution.
3D Airflow
Multi-directional airflow system allows for customized air distribution patterns to suit room layout and occupant preferences.
Daikin Intelligent Touch Controller
Advanced touchscreen controller with Wi-Fi connectivity allows remote control via smartphone app, scheduling, and energy usage monitoring.
Quiet Operation
Specially designed components and sound-dampening materials ensure whisper-quiet operation for undisturbed comfort.
Operating Modes Explained
Cool Mode
Standard cooling operation with adjustable temperature and fan speed settings
Heat Mode
Heating operation with defrost cycle for efficient operation in cold conditions
Auto Mode
System automatically selects cooling or heating based on room temperature
Dry Mode
Dehumidification function that removes excess moisture without overcooling
Fan Mode
Circulates air without heating or cooling, with multiple fan speed options
Night Mode
Quieter operation with adjusted temperature settings for comfortable sleep
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| System not starting | Power issue, thermostat setting, safety lockout | Check circuit breaker, verify thermostat settings, wait 3 minutes before restart |
| Poor cooling/heating | Dirty filters, low refrigerant, blocked vents | Clean filters, check for refrigerant leaks, ensure vents are unobstructed |
| Unusual noises | Loose parts, debris in fan, ice buildup | Tighten mounting hardware, clear debris from outdoor unit, check for ice |
| Water leakage | Clogged drain line, improper slope, frozen coil | Clear drain line, ensure proper drainage slope, check for ice on coil |
| Frequent cycling | Dirty filters, incorrect sizing, thermostat location | Clean filters, verify system sizing, check thermostat placement |
| Error codes displayed | Sensor failure, communication error, system fault | Refer to error code chart in manual, contact technician if persistent |
Common Error Codes
- U0: Refrigerant shortage - Check for leaks and charge level
- U2: Low voltage - Check power supply and connections
- U4: Communication error - Check wiring between indoor/outdoor units
- E5/E6: Indoor coil sensor fault - Check sensor connections
- H9: Outdoor temperature sensor fault - Check sensor and wiring
- L5: Overload protection - Check for obstructions and clean filters
- P1: Fan motor protection - Check fan operation and clear obstructions
Manual Downloads
Current Model Manuals
FDXM50FVJU
5.0kW Inverter Ducted System
FDXM35FVJU
3.5kW Inverter Ducted System
FDXM60FVJU
6.0kW Inverter Ducted System
FDXM75FVJU
7.5kW Inverter Ducted System
Popular Previous Models
FDXS25FVJU
2.5kW Standard Ducted System
FDXS35FVJU
3.5kW Standard Ducted System
FDXM50FVMU
5.0kW Inverter Multi-zone
FDXN35FVJU
3.5kW Non-Inverter System