Fujitsu Halcyon Mini Split Installation Manual

The Fujitsu Halcyon Mini Split system is a high-efficiency ductless air conditioning and heating solution featuring inverter technology, multiple operating modes, remote control operation, and advanced climate control capabilities. This manual covers proper installation procedures, safety guidelines, electrical requirements, refrigerant handling, and system commissioning for residential and light commercial applications.

1. Safety Precautions 2. System Components 3. Pre-Installation Planning 4. Installation Requirements 5. Mounting Procedures 6. Refrigerant Piping 7. Electrical Connections 8. Vacuum and Leak Testing 9. System Commissioning 10. Troubleshooting 11. Specifications

Safety Precautions

Critical safety information for installers and technicians.

Hazard	Precaution
Electrical shock	Disconnect power before servicing; use proper PPE
Refrigerant exposure	Wear safety glasses and gloves during handling
Heavy lifting	Use proper lifting techniques; two-person lift recommended
Sharp edges	Wear cut-resistant gloves during unit handling
High pressure	Release pressure before opening refrigerant circuits

WARNING! Only qualified HVAC technicians should perform installation. Follow all local codes and regulations.

System Components

Complete system package includes indoor unit, outdoor unit, remote control, and installation accessories.

Indoor Unit: Wall-mounted evaporator with LCD display
Outdoor Unit: Condenser with inverter compressor
Remote Control: Wireless controller with timer functions
Installation Kit: Mounting bracket, communication cable, drain hose
Refrigerant Lines: Pre-charged quick connect lines (specific models)

Pre-Installation Planning

Proper planning ensures optimal performance and efficiency.

Select indoor unit location: Away from direct sunlight, heat sources, and moisture
Determine outdoor unit placement: Stable surface with adequate clearance
Plan refrigerant line routing: Minimum bends, proper insulation
Verify electrical requirements: Dedicated circuit, proper voltage
Check drainage requirements: Proper slope for condensate removal

Tip: Maintain minimum clearances: 6" top, 12" sides for indoor unit; 24" all around for outdoor unit.

Installation Requirements

Tools and materials needed for professional installation.

Category	Requirements
Tools	Vacuum pump, manifold gauge, flaring tool, torque wrench, multimeter
Materials	Refrigerant, insulation, wall sleeve, electrical conduit
Electrical	208/230V dedicated circuit, disconnect switch, proper wire gauge
Structural	Reinforced wall mounting, level surface for outdoor unit

Mounting Procedures

Step-by-step mounting instructions for indoor and outdoor units.

Install wall bracket: Level and secure to studs with provided hardware
Create wall penetration: 3" hole with proper sleeve installation
Mount indoor unit: Hang on bracket, ensure level position
Place outdoor unit: Concrete pad or vibration-absorbing pads
Secure outdoor unit: Anchor bolts or vibration isolation mounts

CAUTION! Ensure wall can support unit weight (typically 15-30 lbs for indoor unit).

Refrigerant Piping

Proper refrigerant line installation and connection procedures.

Route refrigerant lines: Through wall sleeve with proper insulation
Flare connections: 45-degree angle, burr-free finish
Connect lines: Indoor unit first, then outdoor unit
Torque fittings: Manufacturer specifications (typically 18-22 ft-lbs)
Insulate lines: Complete vapor barrier on suction line

WARNING! Never use compression fittings. Always purge with nitrogen during brazing.

Electrical Connections

Wiring and electrical connection guidelines.

Install disconnect: Within sight of outdoor unit
Connect power wiring: Follow color coding and torque specifications
Run communication cable: Shielded cable between indoor and outdoor units
Ground all units: Proper grounding per NEC requirements
Verify voltage: 208/230V ±10%

CAUTION! Turn off power at disconnect before making electrical connections.

Vacuum and Leak Testing

System evacuation and leak detection procedures.

Pressure test: Dry nitrogen to 300-500 PSI, hold for minimum 30 minutes
Evacuate system: Deep vacuum to 500 microns or less
Hold vacuum: System should hold 1000 microns or less for 15 minutes
Release refrigerant: Open service valves per manufacturer instructions
Leak check: Electronic leak detector or bubble solution

System Commissioning

Final setup and performance verification.

Power up system: Turn on disconnect switch
Test operation: Cooling and heating modes
Check temperatures: Supply/return air, discharge line
Verify drainage: Proper condensate flow
Program remote: Set clock, timer functions
Customer orientation: Explain basic operation and maintenance

Troubleshooting

Common installation issues and solutions.

Symptom	Possible Cause	Corrective Action
Unit not starting	Power supply, wiring	Check disconnect, verify voltage, inspect connections
Poor cooling	Refrigerant charge, airflow	Check superheat/subcooling, clean filters, verify fan operation
Water leakage	Drain line, installation angle	Clear drain line, ensure proper unit leveling
Error codes	Sensor failure, communication	Refer to service manual, check sensor readings
Noisy operation	Vibration, loose parts	Secure mounting, check for rattles, verify compressor mounts

Specifications

Cooling Capacity: 9,000 - 36,000 BTU/h (model dependent)
Heating Capacity: 10,000 - 34,000 BTU/h (model dependent)
Power Supply: 208/230V, 1-phase, 60Hz
Refrigerant: R410A
Operating Range: Cooling: 14°F to 115°F; Heating: -13°F to 75°F
Sound Level: Indoor: 19-34 dB; Outdoor: 49-58 dB
SEER Rating: Up to 33.1 (model dependent)
Warranty: 5-7 years compressor, 1 year parts