EM500 Open-Loop Vector Control Inverter User Manual Altitude and Derating When inverter is used in an area at an altitude of over 1,000m, the cooling effect will degrade, so it must be derated. For details, please consult SINEE. Attentions at Inverter Scrapping Burning the electrolytic capacitors of the mains and PCB may result in explosion and burning plastic parts may generate toxic gas. Please handle them as industrial wastes when inverter is scrapped. 7