R-Pro › Field cases › Air conditioning
Outdoor Unit Sun Shielding — Efficiency & Compressor Protection
Likely causes
Direct sun raises condensing temp → high-pressure trip
Check: Common 1-5pm on south/west rooftop units. Ambient 35°C but surface >60°C (IR thermometer). HP cutout (R-410A ≈600 psi trip). Discharge >110°C accelerates oil carbonization.
What to do: Awning (50cm above unit) or metal louver. Don't attach directly (blocks airflow). Keep 60cm clearance L/R/front. Prioritize intake-side shade. If not, mist cooling (fine spray over condenser top) — beware corrosion/scale. Reflective rooftop paint as backup.
#1 dispute on Korean rooftops = insufficient clearance. With awning, get neighbor consent (drop/aesthetic disputes). Mist cooling accelerates aluminum coil corrosion — not recommended (use shade first). Be wary of '30% improvement' fake reviews — actual is 5-10%.
All 565 cases work offline in R-Pro, with error codes for 62 brands and P-T data for 108 refrigerants.
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