Job Summary:   The HVAC Maintenance Technician is responsible for carrying out preventive, corrective, predictive, and emergency maintenance of HVAC systems to ensure reliable, energy-efficient, and uninterrupted operation of air conditioning, ventilation, and refrigeration equipment. The role includes troubleshooting, repairing, servicing, testing, commissioning, and overhauling HVAC equipment, with strong experience in VRF systems, package units, ducted split units, cassette units, VFD-controlled equipment, and basic knowledge of chilled water systems.   Key Responsibilities: HVAC Preventive & Corrective Maintenance • Perform preventive, corrective, and breakdown maintenance of all HVAC equipment. • Inspect HVAC systems for proper operation and identify potential faults. • Troubleshoot electrical, mechanical, and refrigeration issues. • Carry out routine inspections and functional testing. • Install, repair, replace, and commission HVAC equipment and accessories. • Maintain HVAC systems in accordance with manufacturer recommendations and FM standards.   VRF / VRV Systems • Perform maintenance and troubleshooting of VRF/VRV systems. • Diagnose indoor and outdoor unit faults using service tools and error codes. • Check refrigerant pressure, electronic expansion valves (EEV), inverter boards, compressors, and communication networks. • Perform refrigerant charging and leak detection. • Replace faulty sensors, PCBs, compressors, and electronic components. • Configure system parameters and verify communication between indoor and outdoor units.   Package Air Conditioning Units • Perform maintenance and troubleshooting of package AC units. • Inspect compressors, condenser coils, evaporator coils, blower motors, filters, and electrical controls. • Replace faulty compressors, contactors, capacitors, thermostats, and fan motors. • Check refrigerant levels and system performance.   Ducted Split Units • Service and maintain ducted split AC systems. • Inspect evaporator and condenser units. • Clean coils, filters, drain lines, and blower assemblies. • Diagnose airflow, cooling, and electrical faults.   Cassette Type Air Conditioners • Perform preventive and corrective maintenance. • Clean indoor units, drain pumps, filters, and coils. • Troubleshoot communication, sensor, and drainage issues. • Repair refrigerant leaks and replace defective components.   Split Air Conditioning Units • Service wall-mounted and floor-mounted split AC systems. • Diagnose compressor, fan motor, PCB, capacitor, thermostat, and refrigerant issues. • Perform refrigerant charging and leak testing. • Replace damaged refrigeration components.   Ventilation Systems • Maintain ventilation fans, exhaust fans, and fresh air units. • Inspect belts, bearings, pulleys, dampers, and motors. • Perform air balancing checks where required.   Compressors • Diagnose compressor failures. • Overhaul semi-hermetic and reciprocating compressors (where applicable). • Replace valves, pistons, gaskets, bearings, and seals. • Perform compressor replacement for hermetic and scroll compressors. • Conduct vacuuming, nitrogen pressure testing, and refrigerant charging after repairs.   VFD (Variable Frequency Drive) Systems • Inspect VFD-operated AHUs, FCUs, pumps, and ventilation fans. • Assist in troubleshooting VFD alarms. • Check motor performance, cooling fans, and drive parameters. • Coordinate with electrical technicians during VFD repairs.   Basic Chiller Knowledge • Assist in preventive maintenance of chilled water systems. • Inspect chillers, chilled water pumps, condenser pumps, and cooling towers. • Check chilled water temperature, pressure, and flow. • Monitor system performance and report abnormalities. • Assist senior technicians during chiller servicing and troubleshooting.   Refrigeration Work • Leak detection using nitrogen and electronic leak detectors. • Brazing copper pipes. • Pressure testing. • Vacuuming refrigeration systems. • Refrigerant recovery and charging. • Replace filter driers, expansion valves, solenoid valves, pressure switches, and sight glasses.   Troubleshooting • Diagnose electrical, refrigeration, and mechanical faults. • Analyze system pressures, temperatures, current, and voltage. • Identify root causes of recurring failures. • Restore equipment operation with minimal downtime.   Documentation • Complete preventive maintenance checklists. • Record equipment faults and corrective actions. • Update CMMS work orders. • Maintain refrigerant usage records. • Prepare maintenance reports.