General System Overview
- Visual inspection of chiller unit and surrounding areas for leaks, damage, or abnormal conditions
- Record total operating hours and compressor starts for maintenance tracking
- Verify all alarms (temperature, pressure, water flow) are functional and audible
- Check proper labeling and warning signs for hazard identification
- Inspect for corrosion, cracks, or loose components
- Ensure adequate clearance around unit for service access
Control System & Display
- Mitsubishi control panel display functional and clear
- No active alarms or fault codes displayed
- Control panel buttons and interface responsive
- Operating parameters within normal ranges
- Historical data logging functioning properly
- Setpoints appropriate for current building load
Compressor & Refrigerant System
- Centrifugal compressor operation smooth with no unusual vibrations or noises
- Refrigerant levels checked and no leaks detected
- Oil levels in compressor at correct level and clean
- Oil return system functioning correctly
- Oil heater operation preventing refrigerant migration
- Bearing temperatures within acceptable limits
Electrical Components
- Chiller receiving correct voltage and current per specifications
- Proper grounding and secure electrical connections verified
- All electrical connections free from corrosion and wear
- Motor amperage within specified limits
- Motor wiring and connections in good condition
- Variable frequency drive (if equipped) operating properly
Water Systems
- Proper chilled water flow and pump operation within parameters
- Adequate condenser water flow with no obstructions or debris
- Chilled and condenser water temperatures within specified ranges
- Water pressure gauges accurate and within acceptable limits
- Pressure relief valves inspected to prevent overpressure risks
- Water treatment system functioning and chemical levels appropriate
Heat Exchangers
- Condenser and evaporator coils inspected for cleanliness and fouling
- Coil cleaning performed per maintenance schedule
- Proper filtration and draining to prevent accumulation
- Heat exchanger approach temperatures within limits
- No visible leaks in heat exchanger connections
- Tube bundle condition monitored for scaling or corrosion
Safety & Protection Systems
- High/low pressure switches tested and functioning properly
- Temperature sensors and emergency shutoffs operational
- Emergency shutdown systems tested for functionality
- All emergency switches clearly labeled and accessible
- Safety relief valves properly seated and functional
- Lockout/tagout procedures clearly posted and followed
Performance Monitoring
- System efficiency and energy consumption monitored
- Energy usage within optimal efficiency parameters
- Historical performance data reviewed for trends or anomalies
- Actual values compared with manufacturer specifications
- Capacity control responding appropriately to load changes
- Operating hours and maintenance schedules updated
Documentation & Reporting
- Daily inspection log maintained with all activities recorded
- Maintenance records properly documented and updated
- Compliance with environmental regulations verified
- Safety inspections and compliance guidelines documented
- Refrigerant use and waste disposal procedures followed
- Service reports and recommendations properly filed