Overview
This document provides guidelines and recommended practices for maintaining Fujitsu air conditioning systems to ensure long-term efficiency, reliability, and hygiene. It outlines preventive maintenance schedules, component inspection frequencies, and cleaning procedures designed to extend product life and minimize unexpected failures. These are recommendations intended to support professional maintenance planning and do not replace site-specific service requirements
1. Maintenance Menu Options
The guidelines propose three service levels tailored to varying operational demands:
| Service Rank | Scope of Work | Purpose |
|---|---|---|
| Gold | 17-point inspection and cleaning including air intake checks, condensate tray cleaning, compressor/fan operation, control setting verification, and full electrical inspection. | Comprehensive annual service for performance and reliability. |
| Silver | 11-point inspection covering key electrical, mechanical, and airflow components. | Routine operational check and fault prevention. |
| Bronze | 3-point service: filter, coil, and diagnostic check via service tool. | Basic maintenance for light-use or seasonal operation. |
Customers may choose one of the above or customize maintenance items according to application or environment (e.g., commercial offices, hospitality, or industrial use)
2. Preventive Cleaning and Inspection
The document emphasizes preventive cleaning to maintain air conditioning efficiency and prevent operational issues such as water leaks, airflow restriction, and system failure:
Indoor Unit Components to Clean:
Heat exchanger, drain pump, drain pan, and turbo fan.Recommended Timing:
Cleaning should be performed before each cooling season to prevent dirt accumulation and water carryover.Contamination Levels:
Level 1: No visible dirt – normal operation.
Level 2: Light contamination – cleaning recommended.
Levels 3–5: Moderate to severe contamination – cleaning required to avoid airflow blockage or component failure
draft maintenance guideline
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Note: Proper cleaning prevents slime buildup and microbial contamination in condensate systems, supporting both system longevity and indoor air quality.
3. Recommended Replacement Intervals
Page 5 of the document outlines estimated component replacement intervals and preventive overhaul timing:
| Component | Typical Replacement Range | Remarks |
|---|---|---|
| Compressor, Fan Motor | 7th–11th year | Replace during major preventive maintenance cycle. |
| Sensors (Temp/Pressure) | ~5 years | Prevent control faults affecting system performance. |
| Control PCB / Inverter PCB | 7th–11th year | Replace to avoid age-related electronic degradation. |
| Drain Pump / Magnetic Relay | ~10 years | Replace during mid-life overhaul. |
Preventive maintenance between the 7th and 11th year significantly reduces failure risk and supports continued performance beyond the typical product lifecycle
4. Common Wear-Related Issues
The document identifies the effects of part deterioration on system performance:
Indoor Unit: Fan bearing wear, motor coil damage, temperature sensor resistance drift, or drain pump failure.
Outdoor Unit: Inverter PCB capacitor degradation, expansion valve sticking, or compressor mechanical wear.
Routine inspections and pre-emptive replacements can prevent major breakdowns and energy inefficiency
5. Cleaning Service Plan (Building Sanitation Management)
A supplementary Air Conditioner Cleaning Service Plan recommends:
Periodic cleaning of filters, heat exchangers, drain pans, and drain pumps;
Visual inspection before and after cleaning to verify restoration of airflow and hygiene standards.
This plan aligns with general Building Sanitation Management practices and ensures compliance with environmental hygiene standards
6. Key Recommendations
Follow preventive cleaning and inspection schedules tailored to site usage and environment.
Conduct a comprehensive overhaul between the 7th and 11th year of operation.
Replace critical control and mechanical components within recommended cycles.
Verify coil and filter cleanliness before each cooling season.
Maintain records of service and inspection for audit and warranty support.
Conclusion
These guidelines serve as best-practice recommendations for maintaining Fujitsu air conditioning systems.
They are not mandatory requirements but form part of Fujitsu’s preventive maintenance framework to:
Prolong system life,
Maintain energy efficiency, and
Ensure occupant comfort and hygiene.
Proper adherence to these recommendations will minimize downtime, reduce repair costs, and sustain product performance throughout its operational life.