The Fujitsu Airstage is a comprehensive HVAC system featuring advanced air conditioning technology, energy-efficient operation, intelligent climate control, multi-zone capabilities, remote monitoring, and maintenance diagnostics. Designed for commercial and residential applications with various models including split systems, VRF systems, and central air conditioning units. Below are key sections for safety procedures, technical specifications, installation guidelines, maintenance protocols, troubleshooting, and repair procedures.
Key components: Outdoor unit, Indoor units, Remote controller, Refrigerant piping, Electrical connections, Communication cables.
| Component | Description |
|---|---|
| Outdoor Unit | Compressor, condenser, fan motor, control board |
| Indoor Unit | Evaporator, blower motor, air filter, drain pan |
| Remote Controller | Temperature setting, mode selection, timer functions |
| Refrigerant Piping | Copper pipes for refrigerant flow between units |
| Electrical Connections | Power supply, communication wiring, safety switches |
| Control Board | Main processor, memory, input/output interfaces |
| Temperature Sensors | Room temperature, coil temperature, ambient temperature |
| Expansion Valve | Electronic expansion valve for refrigerant control |
| Fan Motors | DC inverter motors for efficient airflow |
| Drain System | Condensate removal piping and pump |
Always follow safety protocols when servicing HVAC equipment.
WARNING! High voltage present in electrical components. Refrigerant under high pressure. Always follow local codes and regulations.
Proper installation is critical for system performance and longevity.
CAUTION! Ensure all connections are tight and properly insulated. Follow torque specifications for flare nuts.
Electrical specifications and connection procedures for various models.
| Terminal | Function | Specification |
|---|---|---|
| L1, L2 | Power Input | 208-230V AC |
| N | Neutral | White wire |
| G | Ground | Green or bare copper |
| S1, S2 | Communication | Two-wire communication bus |
| Y | Compressor Control | Compressor speed signal |
| C | Common | Common return |
Tip: Always verify voltage and phase requirements before connecting power.
Proper procedures for refrigerant charging and recovery.
WARNING! R410A operates at higher pressures than R22. Use dedicated R410A gauges and hoses.
Regular maintenance ensures optimal performance and extends system life.
| Interval | Task | Procedure |
|---|---|---|
| Monthly | Filter Cleaning | Wash or replace air filters |
| Seasonal | Coil Inspection | Clean evaporator and condenser coils |
| Annual | Electrical Check | Inspect connections, measure voltage/amperage |
| Annual | Refrigerant Check | Measure superheat and subcooling |
| Biannual | Drain System | Clear condensate drain lines |
| As Needed | Fan Maintenance | Clean blower wheels, check motor bearings |
Common error codes and their meanings for troubleshooting.
| Code | Description | Possible Cause |
|---|---|---|
| E0 | Protection Device Activated | High pressure, overload, temperature sensor |
| E1 | PCB Error | Control board malfunction |
| E3 | High Pressure Protection | Dirty condenser, fan failure, overcharge |
| E4 | Low Pressure Protection | Refrigerant leak, restriction, undercharge |
| E5 | Compressor Overload | Electrical issue, mechanical failure |
| E6 | Communication Error | Wiring issue, board failure |
| E7 | Outdoor Fan Motor Error | Motor failure, capacitor, wiring |
| E8 | AC Input Overcurrent | Power supply issue, short circuit |
| E9 | Cold Storage Protection | Low ambient temperature operation |
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Unit not starting | Power supply, fuse, breaker | Check voltage, reset breaker, replace fuse |
| Poor cooling/heating | Dirty filters, low refrigerant | Clean filters, check charge, clean coils |
| Unusual noises | Loose parts, fan imbalance | Tighten fasteners, balance fan assembly |
| Water leakage | Clogged drain, improper slope | Clear drain line, ensure proper pitch |
| Error code displayed | System fault | Refer to diagnostic code chart |
| Short cycling | Thermostat, pressure switch | Check thermostat location, pressure settings |
Reset Procedure: Turn power off for 5 minutes, then restart system.
Authorized replacement parts and installation procedures.
Note: Use only Fujitsu authorized replacement parts to maintain warranty coverage.
Fujitsu Airstage warranty terms and service procedures.
Standard Warranty: 5 years on compressor, 1 year on parts and labor from date of installation.
Extended Warranty: Available for registered installations with proper maintenance records.
Warranty Claims: Contact authorized Fujitsu distributor with model number, serial number, and installation date.
Technical Support: Contact Fujitsu technical support at 1-800- Fujitsu or visit www.fujitsugeneral.com
Service Network: Only authorized service providers should perform warranty repairs.