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Refrigeration System Preventive Maintenance

• Design, implement, and manage the Preventive Maintenance Schedule (PMS) for all refrigeration units, ensuring services are completed at correct intervals per manufacturer specifications.
• Carry out comprehensive refrigeration services including; refrigerant level checks and top-ups, compressor oil changes, condenser and evaporator coil cleaning, belt and pulley inspection/replacement, filter drier replacement, defrost system checks, and temperature controller calibration.
• Inspect and maintain all refrigerant containment components — hoses, fittings, service valves, and seals — to minimize refrigerant leakage and ensure environmental compliance.
• Verify and document temperature pull-down performance for each reefer unit before dispatch to confirm it meets the required set-point within the specified time.

Fault Diagnosis & Corrective Repairs

• Diagnose and repair complex refrigeration system faults including; compressor failures, condenser/evaporator coil blockages, refrigerant leaks, expansion valve malfunctions, electrical control board faults, and defrost system failures.
• Use refrigerant manifold gauges, leak detectors, digital thermometers, clamp meters, and OEM diagnostic software to accurately characterize system faults before committing repairs.
• Carry out refrigerant recovery, recycling, and recharging operations in compliance with environmental regulations governing refrigerant handling (HFCs, HFOs).
• Diagnose and repair the electrical and electronic control systems of TRUs, including microprocessor controllers, sensors, wiring harnesses, and alarm systems.
• Respond to field refrigeration breakdowns, attending the site where necessary or providing expert remote guidance to drivers and mechanics to safeguard the cold chain.

Cold-Chain Compliance & Temperature Management

• Ensure all reefer units are calibrated and verified to maintain required temperature ranges (chilled: 0°C to +5°C; frozen: -18°C and below, or as specified per consignment).
• Collaborate with the Telematics Officer to monitor remote temperature data and investigate any in-transit temperature excursions, documenting findings and corrective actions.
• Maintain temperature calibration certificates and service logs for each reefer unit, ensuring records are available for customer, regulatory, or food safety audits.
• Advise operations and dispatch teams on pre-cooling requirements, set-point configurations, and cargo loading practices that support cold-chain integrity.

Technical Standards, Procedures & Engineering Input

• Develop and maintain refrigeration maintenance standard operating procedures (SOPs), inspection checklists, and technical guidelines for use by the maintenance team.
• Provide engineering recommendations to the Maintenance Manager and Production Teams on reefer unit replacement, upgrade, or capital overhaul decisions
• Review and evaluate specifications for new refrigeration equipment acquisitions, ensuring suitability for the Ugandan operating environment (ambient temperatures, road conditions, load profiles).
• Stay current with developments in refrigeration technology, refrigerant regulations, and cold-chain best practices; introduce improvements where appropriate.

Mentoring, Training & Knowledge Transfer

• Provide structured technical guidance and on-the-job training to technicians on refrigeration fundamentals, safe refrigerant handling, and basic servicing tasks.
• Conduct toolbox talks on refrigeration safety, refrigerant handling procedures, and cold-chain compliance awareness for drivers and mechanics.
• Document technical knowledge in the form of maintenance guides, fault-finding flowcharts, and repair references accessible to the wider maintenance team.

Documentation, Reporting & Parts Management

• Maintain a comprehensive refrigeration maintenance register covering each RU: service history, fault log, refrigerant charge records, calibration history, and component replacement log.
• Complete and submit accurate job cards for every refrigeration repair or service, reconciling parts usage and labour hours before equipment release.
• Prepare and submit monthly refrigeration performance reports to the Maintenance Manager, covering system uptime, fault trends, refrigerant consumption, and KPI performance.
• Manage refrigerant gas stock, spare parts inventory, and specialist tool calibration in coordination with procurement and stores.