DC Fast Charger Cooling System Inspection Checklist [FREE PDF]

DC fast chargers generate significant heat during high-power charging sessions, requiring robust cooling systems to maintain safe operating temperatures and prevent equipment failure. NEC Article 625 and UL 2594 mandate that EV supply equipment be installed and maintained to prevent thermal hazards, including adequate ventilation and cooling. Regular inspection of cooling components—fans, heat exchangers, coolant levels, and thermal sensors—is essential to ensure continuous uptime and compliance

Industry: EV Charging Networks
Frequency: Monthly
Estimated Time: 35-50 minutes
Role: EV Station Technician
Total Items: 36
Compliance: NEC Article 625 EV Charging Systems, UL 2594 Standard for Electric Vehicle Supply Equipment, NFPA 70 National Electrical Code Section 110.13, OSHA 29 CFR 1910.303 Electrical Safety General Requirements, SAE J1772 Electric Vehicle Conductive Charge Coupler

Exterior Cooling Vents & Airflow

Verify that exterior ventilation openings are clear, undamaged, and providing adequate airflow per equipment specifications.

Are all exterior cooling vents free from debris, dirt, or obstructions?
Are vent screens or grilles intact and undamaged?
Is minimum clearance maintained around the unit as specified by the manufacturer?
Are there any signs of heat discoloration or scorching near vent openings?
Photo of exterior vent condition captured?

Cooling Fan Operation & Condition

Inspect internal and external cooling fans for proper operation, noise, vibration, and physical condition.

Do all cooling fans spin freely without unusual noise or vibration during operation?
Are fan blades free from cracks, chips, or physical deformation?
Do fans activate automatically when the unit reaches the manufacturer-specified temperature threshold?
Are fan motor connections secure and free from corrosion?
Number of cooling fans confirmed operational?

Liquid Cooling System (If Applicable)

For liquid-cooled DCFC units, inspect coolant levels, hose integrity, pump operation, and heat exchanger condition.

Is coolant level within the manufacturer-specified operating range?
Are coolant hoses and fittings free from leaks, cracks, or deterioration?
Is the coolant pump operating without unusual noise or vibration?
Is the heat exchanger free from corrosion, fouling, or physical damage?
Has coolant been replaced per the manufacturer-recommended service interval?

Thermal Sensors & Temperature Monitoring

Verify that all thermal sensors, temperature alarms, and monitoring systems are functional and reporting accurately.

Are all onboard thermal sensors reporting temperatures within normal operating ranges via the management interface?
Does the unit generate an alarm or fault code when simulated thermal overtemperature is triggered?
Measured internal cabinet temperature at time of inspection?
Are thermal sensor wiring harnesses secure and undamaged?
Has a thermal imaging scan been performed on power electronics during this inspection?
Photo of thermal sensor display or management dashboard readings captured?

Power Electronics & Heat Sink Condition

Inspect power conversion components, heat sinks, and insulation for signs of thermal stress or degradation.

Are heat sinks on power modules free from dust accumulation that could impair dissipation?
Are there any visible signs of burn marks, discoloration, or melting on power electronics or PCBs?
Is thermal interface material (TIM) between components and heat sinks in good condition with no signs of dry-out?
Are all cable ties and mounting hardware securing power cables to prevent contact with heat-generating components?
Photo of power electronics and heat sink assembly captured?

Charging Cable & Connector Thermal Condition

Inspect the charging cable, connector, and cable management for signs of overheating or thermal degradation.

Is the charging cable free from hot spots, swelling, or jacket discoloration along its entire length?
Is the CCS or CHAdeMO connector body free from heat-related deformation or discoloration?
For liquid-cooled cables, is there evidence of coolant flow through the cable assembly?
Is the cable strain relief and holster in good condition to prevent mechanical stress on thermally sensitive components?
Photo of charging cable and connector condition captured?

Documentation & Corrective Actions

Record all findings, deficiencies identified, and corrective actions taken or scheduled.

Were any deficiencies or faults identified during this cooling system inspection?
Describe all deficiencies found and corrective actions taken or planned?
Has the unit been cleared for return to service following this inspection?
Has this inspection report been logged in the network management system?
Additional notes or observations for this inspection?

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Why Use This DC Fast Charger Cooling System Inspection Checklist [FREE PDF]?

This dc fast charger cooling system inspection checklist [free pdf] helps ev charging networks teams maintain compliance and operational excellence. Designed for ev station technician professionals, this checklist covers 36 critical inspection points across 7 sections. Recommended frequency: monthly.

Ensures compliance with NEC Article 625 EV Charging Systems, UL 2594 Standard for Electric Vehicle Supply Equipment, NFPA 70 National Electrical Code Section 110.13, OSHA 29 CFR 1910.303 Electrical Safety General Requirements, SAE J1772 Electric Vehicle Conductive Charge Coupler. Regulatory-aligned for audit readiness and inspection documentation.

Frequently Asked Questions

What does the DC Fast Charger Cooling System Inspection Checklist [FREE PDF] cover?

This checklist covers 36 inspection items across 7 sections: Exterior Cooling Vents & Airflow, Cooling Fan Operation & Condition, Liquid Cooling System (If Applicable), Thermal Sensors & Temperature Monitoring, Power Electronics & Heat Sink Condition, Charging Cable & Connector Thermal Condition, Documentation & Corrective Actions. It is designed for ev charging networks operations and compliance.

How often should this checklist be completed?

This checklist should be completed monthly. Each completion takes approximately 35-50 minutes.

Who should use this DC Fast Charger Cooling System Inspection Checklist [FREE PDF]?

This checklist is designed for EV Station Technician professionals in the ev charging networks industry. It can be used for self-assessments, team audits, and regulatory compliance documentation.

Can I download this checklist as a PDF?

Yes, this checklist is available as a free PDF download. You can also use it digitally in the POPProbe mobile app for real-time data capture, photo documentation, and automatic reporting.