R-Pro › Field cases › Air conditioning
On-Site Energy Audit — Current/Power/Run-Time Measurement
Likely causes
High bill complaint = system + operation + ambient analysis
Check: **Procedure**: ① **Clamp meter** measure (LP/HP current, normal 80-100% of rated). ② **Power meter** 24h time + avg power (normal 8-12 h/day). ③ **Inverter** RPM range (0-120Hz). ④ **Nameplate rated** vs measured (RT, 1 RT ≈ 1.2 kW). ⑤ **Ambient correction** (35°C → +1HP × 1.5 RT). **Signals**: ① Current +20% = coil block/overload/debris. ② Run time 16h+/day = capacity short/poor insulation. ③ Inverter full-load sustained = system mismatch. ④ -30% rated = OK but underperformance (purchase defect).
What to do: **Improvement**: ① **Coil/filter clean** = +15-30% efficiency, instant. ② **Insulation check** (window/wall/ceiling) = +20% capacity. ③ **User education** = 24°C/auto/fan. ④ **Evening-only run** = -20% energy. ⑤ **System replace** (10+ yr) = R-32 1st grade = 30% savings. **Print result for user**: current vs recommended pattern → monthly savings estimate ₩X. Korea KEPCO progressive tariff = 1500 kWh/mo avg, summer +500 → +₩200k. Efficient replacement = 5 yr ROI.
Korea progressive 4-tier (200/300/450 kWh). Summer avg +50%. Accurate power = main breaker clamp + 24h datalogger (HIOKI PW3360 ~₩2M). Residential = simple clamp HIOKI 3288 (₩300k) enough. Diagnostic PDF report + photos + recommendations = chargeable ₩50k (Korea 'energy audit' value-add).
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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