Fujitsu Cassette Manual

The Fujitsu Cassette series represents a line of high-performance cassette-type air conditioning units designed for commercial and residential applications. These systems feature advanced inverter technology, energy-efficient operation, multiple fan speeds, wireless remote control, auto-swing louvers, timer functions, and comprehensive safety features. Below are key sections covering installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Cassette unit with 4-way airflow, wireless remote controller, drainage system, refrigerant connections, and electrical terminals.

Feature	Description
Inverter Technology	Energy-efficient compressor operation with variable speed control
4-Way Airflow	Even distribution of conditioned air in all directions
Auto Swing Louvers	Automatic vertical and horizontal air direction adjustment
Quiet Operation	Low noise levels for comfortable environment
Multiple Fan Speeds	Auto, High, Medium, Low, and Quiet modes
Timer Functions	24-hour on/off timer programming
Self-Cleaning	Automatic evaporator cleaning function
Filter Indicator	Reminder for filter cleaning maintenance
Sleep Mode	Energy-saving operation during nighttime
Emergency Drainage	Backup drainage system for overflow protection

Installation Guidelines

Professional installation required. Ensure proper ceiling structure and clearance.

1. Ceiling Preparation: Verify ceiling can support unit weight (minimum 50kg capacity).
2. Unit Mounting: Use provided hanging bolts and ensure level installation.
3. Refrigerant Piping: Connect using flare connections with proper torque specifications.
4. Drainage System: Install drain hose with proper slope (minimum 1/100 gradient).
5. Electrical Wiring: Connect to dedicated circuit with proper grounding.
6. Communication Wiring: Connect indoor and outdoor units per wiring diagram.

WARNING! Installation must be performed by qualified technicians only. Incorrect installation may cause water leakage, electric shock, or fire.

First-Time Setup

After installation, perform initial setup and test operation.

1. Power On: Turn on circuit breaker and wait for unit initialization.
2. Remote Control: Install batteries and pair with indoor unit.
3. Test Operation: Run cooling and heating modes to verify proper function.
4. Airflow Adjustment: Set louvers to desired positions using remote control.
5. Timer Setup: Program daily operation schedule if required.
6. Temperature Calibration: Verify temperature readings match room conditions.

CAUTION! Allow unit to complete initialization before operation. Do not interrupt power during first startup.

Technical Specifications

• Cooling Capacity: 24,000 - 60,000 BTU/h (varies by model)
• Heating Capacity: 26,000 - 65,000 BTU/h (varies by model)
• Power Supply: 208-230V, 60Hz, 1Phase/3Phase
• Refrigerant: R410A
• Noise Level: 28-45 dB(A) depending on fan speed
• Airflow: 800-1800 CFM adjustable
• Dimensions: Standard 600x600mm or 700x700mm ceiling cutout
• Weight: 25-45 kg depending on model
• Operating Range: Cooling: 14°F to 115°F (-10°C to 46°C)
• Control System: Wireless remote with temperature and humidity sensors

Controls and Operation

Primary control via wireless remote. Unit also features emergency operation buttons.

Operation Modes: AUTO, COOL, HEAT, DRY, FAN ONLY

Temperature Setting: 16°C - 30°C (61°F - 86°F) in 1°C increments

Fan Speeds: AUTO, HIGH, MEDIUM, LOW, QUIET

Advanced Features: I-AUTO (intelligent auto operation), Powerful operation, 3D Airflow, Self-cleaning function, Filter sign reset, Timer settings (On/Off)

Maintenance Procedures

Regular maintenance ensures optimal performance and longevity.

1. Air Filter Cleaning: Clean every 2 weeks during operation (more frequently in dusty environments)
2. Front Panel Removal: Press release buttons and carefully remove for access
3. Heat Exchanger Inspection: Check for dust accumulation quarterly
4. Drain Pan Cleaning: Flush with clean water every 3 months
5. Condensate Drain: Verify free flow and clear if obstructed
6. External Unit: Keep area around outdoor unit clear of debris

Tip: Always turn off power before performing any maintenance.

Remote Control Functions

Wireless remote provides complete control of all unit functions.

1. Power: Turns unit on/off
2. Mode Selection: Cycles through operation modes
3. Temperature: Adjusts set temperature
4. Fan Speed: Selects airflow rate
5. Swing: Controls vertical and horizontal louver movement
6. Timer: Programs automatic start/stop times
7. Powerful: Maximum capacity operation for rapid cooling/heating
8. Quiet: Minimum noise operation
9. Filter Reset: Resets filter cleaning reminder
10. Clock Setting: Sets current time for timer functions

WARNING! Keep remote control away from water and extreme temperatures. Replace batteries when display dims.

Error Codes and Diagnostics

Unit displays error codes for troubleshooting. Common codes include:

Error Code	Description	Action Required
E1	Room temperature sensor error	Check sensor connection and resistance
E2	Heat exchanger sensor error	Verify sensor positioning and wiring
E3	Communication error	Check wiring between indoor/outdoor units
E4	Drainage system error	Inspect drain pump and piping
E5	Overcurrent protection	Check electrical components and compressor
E6	High pressure protection	Verify refrigerant charge and outdoor unit airflow
E7	Low pressure protection	Check for refrigerant leaks and restrictions

Care & Cleaning

Proper cleaning maintains efficiency and prevents malfunctions.

1. Air Filters: Remove and clean with vacuum or warm water (air dry completely)
2. Front Panel: Wipe with soft, dry cloth (do not use chemicals)
3. Louver Blades: Clean with soft brush attachment
4. Drain Pan: Flush with clean water and mild detergent if necessary
5. External Surfaces: Dust with soft cloth regularly

CAUTION! Do not use abrasive cleaners, benzene, thinner, or other chemical solvents. Never pour water directly on unit.

Warranty Information

Fujitsu provides comprehensive warranty coverage for cassette units.

• Compressor: 7 years from date of purchase
• Parts: 5 years for functional components
• Labor: 1 year for installation-related issues
• Registration: Online registration required within 60 days of installation

Warranty void if: Unit not installed by licensed professional, used for commercial applications without approval, damaged by improper maintenance, or serial number altered/removed.

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
Unit not starting	Power supply issues	Check circuit breaker, power switch, and wiring connections
Poor cooling/heating	Dirty filters, low refrigerant	Clean filters, check for refrigerant leaks
Water leakage	Clogged drain, improper slope	Clear drain line, verify proper installation angle
Unusual noises	Loose parts, fan obstruction	Tighten mounting bolts, clear fan area
Remote not working	Batteries, signal obstruction	Replace batteries, ensure clear line of sight
Error code display	System malfunction	Refer to error code table and contact technician

Reset Procedure: Turn off power for 10 minutes, then restart. If problem persists, contact authorized service.

Technical Support: 1-800- Fujitsu (1-800-385-4887); www.fujitsugeneral.com