R-Pro › Field cases › Air conditioning
Inverter Overheating from Fouled Heat Sink
Likely causes
Cooling fin blocked by dust and debris
Check: Cut power and remove inverter cover
What to do: Cut power and remove inverter cover → Clean heat sink fins with compressed air → Check cooling fan operation and noise (replace if faulty) → Confirm at least 10 cm clearance around inverter → Restart after cleaning and confirm temperature normalizes
Cooling fan failure reducing airflow
Check: Clean heat sink fins with compressed air
What to do: Clean heat sink fins with compressed air → Check cooling fan operation and noise (replace if faulty) → Confirm at least 10 cm clearance around inverter → Restart after cleaning and confirm temperature normalizes
Poor ventilation at inverter installation location
Check: Check cooling fan operation and noise (replace if faulty)
What to do: Check cooling fan operation and noise (replace if faulty) → Confirm at least 10 cm clearance around inverter → Restart after cleaning and confirm temperature normalizes
Dust accumulation on the inverter heat sink is causing poor cooling. Cleaning will provide immediate improvement. High-voltage sections inside the inverter require 10+ minutes after power-off to be safe to touch.
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