General System Overview
- Inspect unit exterior for leaks, corrosion, and insulation damage
- Log compressor operating hours and analyze start cycles
- Verify alarm history and functionality of emergency stops
VSD Controller & Electrical System
- Review VSD controller logs and monitor display status
- Inspect electrical connections, fuses, and breakers
- Check voltage, amperage, and power quality (harmonics)
- Ensure VSD cooling fans and ventilation systems are operational
Compressor & Refrigerant System
- Monitor compressor noise, vibration, and performance data
- Verify refrigerant charge levels and check for leaks
- Inspect compressor oil level and condition; test oil heater
- Evaluate capacity modulation via VSD controls
Water & Cooling System
- Measure chilled water and condenser water flow and pressures
- Check water quality, chemical treatments, and strainer cleanliness
- Test pump performance and valve operations
Heat Exchangers & Safety Devices
- Inspect condenser and evaporator coils for fouling
- Evaluate heat transfer efficiency through temperature analysis
- Test safety valves, pressure sensors, and emergency shutdowns
Performance Monitoring & Documentation
- Analyze weekly energy consumption and load matching efficiency
- Document inspection findings and corrective actions taken
- Update maintenance logs and plan next inspection tasks