Fujitsu ASU18RLF Manual

The Fujitsu ASU18RLF is a high-efficiency split-type air conditioning system with 18,000 BTU cooling capacity, featuring inverter technology for energy savings, quiet operation, multiple fan speeds, auto-swing louvers, 24-hour timer, remote control operation, air purification filter, and eco-friendly R32 refrigerant. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: Indoor unit, Outdoor unit, Remote Control, Power cable, Drain hose, Installation kit.

Installation

Unpack and inspect contents. Choose appropriate location for indoor and outdoor units.

1. Install outdoor unit: Place on stable, level surface with proper clearance for airflow.
2. Install indoor unit: Mount on wall at least 2.2m from floor with proper tilt for drainage.
3. Connect refrigerant pipes: Use flare connections with proper torque specification.
4. Connect electrical wiring: Follow wiring diagram for proper connections.
5. Connect drain hose: Ensure proper slope for water drainage.
6. Vacuum and charge system: Evacuate air and moisture before charging with refrigerant.

WARNING! Installation must be performed by qualified technician. Ensure proper electrical grounding.

First-Time Setup

After installation, perform initial setup and testing.

1. Power on system: Turn on circuit breaker and press power button on remote.
2. Test operation: Run cooling mode for 15 minutes to verify proper function.
3. Set temperature: Use remote to set desired temperature (16-30°C).
4. Configure timer: Set daily operation schedule if needed.
5. Adjust airflow: Set louver direction and fan speed preferences.

CAUTION! Allow system to stabilize for 10 minutes after power on before changing settings.

Specifications

• Model: ASU18RLF
• Cooling Capacity: 18,000 BTU/h (5.3 kW)
• Heating Capacity: 19,000 BTU/h (5.6 kW)
• Power Input: Cooling: 1500W, Heating: 1650W
• EER/COP: 3.5 (Cooling), 3.4 (Heating)
• Refrigerant: R32 (680g)
• Air Flow: High: 780 m³/h, Low: 480 m³/h
• Noise Level: Indoor: 19-36 dB, Outdoor: 46 dB
• Power Supply: 220-240V, 50/60Hz, 1Phase
• Operating Range: Cooling: -10°C to 46°C, Heating: -15°C to 24°C

Controls and Settings

Access functions via remote control or indoor unit buttons.

Remote Functions: POWER, MODE (Cool/Heat/Dry/Fan/Auto), TEMP ▲▼, FAN SPEED, TIMER, SWING, SLEEP, TURBO, I-FEEL, FILTER RESET.

Operation Modes: COOL for cooling, HEAT for heating, DRY for dehumidification, FAN for ventilation only, AUTO for automatic mode selection. Fan Speeds: AUTO, LOW, MEDIUM, HIGH, TURBO. Timer: 24-hour programmable on/off timer. Swing: Adjust vertical and horizontal air direction. Sleep: Automatic temperature adjustment for comfortable sleep.

Connecting Components

Proper connection between indoor and outdoor units is critical for operation.

1. Refrigerant piping: Connect with flare nuts using proper torque (35-45 Nm).
2. Electrical wiring: Connect power and communication cables according to wiring diagram.
3. Drain hose: Connect with proper slope (minimum 1/100 gradient).
4. Insulation: Apply insulation to all refrigerant pipes and connections.

Tip: Use nitrogen purge during brazing to prevent oxidation inside pipes.

Operating Modes

Multiple operation modes for different comfort needs.

1. Cooling Mode: Set temperature between 16-30°C for cooling operation.
2. Heating Mode: Set temperature between 16-30°C for heating operation.
3. Dry Mode: Automatic dehumidification without significant cooling.
4. Fan Mode: Air circulation only without cooling/heating.
5. Auto Mode: System automatically selects cooling or heating based on room temperature.
6. Turbo Mode: Maximum cooling/heating capacity for quick temperature adjustment.
7. Sleep Mode: Gradually adjusts temperature and reduces fan noise for sleeping.
8. I-Feel Mode: Uses remote control as temperature sensor for precise control.

WARNING! Do not operate heating mode below -15°C outdoor temperature.

Maintenance Features

Auto Clean: Dries indoor unit to prevent mold growth. Filter Indicator: Reminds when to clean air filter. Self-Diagnosis: Displays error codes for troubleshooting.

Care & Cleaning

Regular maintenance ensures optimal performance and longevity.

1. Clean air filter every 2 weeks: Remove, wash with water, dry completely before reinstalling.
2. Clean indoor unit surface: Use soft dry cloth only.
3. Clean outdoor unit: Remove debris from heat exchanger fins.
4. Check drain hose: Ensure proper drainage without blockage.

CAUTION! Always turn off power before cleaning. Do not use chemicals or abrasive cleaners.

Regulatory Information

CE Certified: Complies with European safety standards. RoHS Compliant: Free of hazardous substances. Energy Rating: Class A for energy efficiency. For technical support, visit www.fujitsu-general.com or contact local authorized service center. Manufactured under license from Fujitsu General Limited.

Troubleshooting

Reset: Turn off power for 10 minutes then restart.

Service: Contact authorized Fujitsu service center; www.fujitsu-general.com