Fujitsu Cassette Air Conditioner Installation Manual

The Fujitsu Cassette Air Conditioner is a ceiling-mounted unit designed for commercial and residential applications, featuring multi-directional airflow, energy-efficient inverter technology, quiet operation, remote control, built-in condensate pump, auto-swing louvers, programmable timer, and various operation modes (cooling, heating, fan, dry, auto). Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: Ceiling cassette unit, remote control, condensate pump, refrigerant connections, electrical terminals, air filters, and drainage ports.

Installation Requirements

Ensure proper ceiling structure and clearances before installation.

1. Ceiling strength: Minimum 50kg load capacity; reinforced concrete or steel frame recommended.
2. Clearance requirements: Minimum 300mm above unit for service access.
3. Space requirements: Adequate space for air intake and discharge around ceiling opening.
4. Electrical requirements: Dedicated circuit with proper voltage and amperage.
5. Refrigerant piping: Proper line set length and insulation requirements.

WARNING! Unit is heavy; use proper lifting equipment and multiple installers. Ensure ceiling structure can support unit weight.

Pre-Installation Checklist

Complete these steps before beginning installation.

1. Verify ceiling structure and load capacity.
2. Check electrical supply matches unit requirements.
3. Confirm refrigerant line set length and insulation.
4. Plan drainage route and condensate pump installation.
5. Ensure proper tools and equipment are available.
6. Review local building codes and regulations.

CAUTION! Only qualified HVAC technicians should perform installation. Improper installation may void warranty.

Specifications

• Cooling Capacity: 24,000 - 60,000 BTU/h (depending on model)
• Heating Capacity: 26,000 - 65,000 BTU/h (depending on model)
• Power Supply: 208-230V, 60Hz, 1-phase or 3-phase
• Refrigerant: R410A
• Noise Level: 35-48 dB (indoor unit)
• Air Flow: 800-1800 CFM (depending on model)
• Dimensions: Various sizes for different capacity models
• Weight: 45-85 kg (depending on model)
• Operating Temp: Cooling: 64°F to 109°F; Heating: -4°F to 75°F

Controls and Settings

Access control via remote control or unit interface. Unit features: Power button, operation mode selector, temperature adjustment, fan speed control.

Remote Control: POWER, MODE, TEMPERATURE, FAN SPEED, TIMER, SWING, FILTER RESET, CLOCK SET.

Operation Modes: COOL, HEAT, FAN, DRY, AUTO. Fan Speeds: AUTO, LOW, MEDIUM, HIGH. Timer Settings: 24-hour programmable on/off timer. Swing Control: Adjustable vertical and horizontal louvers. Filter Reset: Reset filter maintenance indicator.

Electrical Connections

Connect to dedicated electrical circuit with proper grounding.

1. Turn off main power supply before making connections.
2. Connect power cables to terminal block according to wiring diagram.
3. Ensure proper grounding connection.
4. Connect communication cables between indoor and outdoor units.
5. Verify all connections are secure and properly insulated.

Tip: Use copper conductors only. Follow local electrical codes and regulations.

Refrigerant Piping

Install refrigerant line set between indoor and outdoor units.

1. Measure and cut refrigerant pipes to required length.
2. Flare pipe ends using proper flaring tool.
3. Install insulation on both liquid and gas pipes.
4. Connect pipes to indoor unit first, then outdoor unit.
5. Pressure test system for leaks.
6. Evacuate system to remove moisture and non-condensables.
7. Charge system with specified amount of R410A refrigerant.

WARNING! Only EPA-certified technicians should handle refrigerant. Use proper safety equipment.

Drainage System

Install condensate drainage with proper slope and routing.

1. Connect drain hose to indoor unit drain port.
2. Ensure minimum 1/100 slope for gravity drainage.
3. Install condensate pump if gravity drainage not possible.
4. Route drain line to approved drainage location.
5. Test drainage system for proper flow.
6. Install drain pan overflow switch for safety.

CAUTION! Ensure proper drainage to prevent water damage. Test system thoroughly.

Care & Maintenance

Regular maintenance ensures optimal performance and longevity.

1. Clean air filters every 2-4 weeks during operation.
2. Check condensate drain line quarterly for blockages.
3. Clean indoor unit heat exchanger annually.
4. Inspect electrical connections annually.
5. Verify refrigerant charge and system pressure annually.

CAUTION! Disconnect power before performing any maintenance. Use only qualified service technicians.

Regulatory Information

UL/CSA certified; complies with FCC Part 15 for electromagnetic interference. EPA refrigerant handling certification required for service. Copyright © 2025 Fujitsu General; all trademarks property of Fujitsu General Limited. For technical support, visit www.fujitsugeneral.com or contact 1-800-843-0604.

Troubleshooting

Reset: Turn power off for 5 minutes, then restart.

Service: 1-800-843-0604; www.fujitsugeneral.com