An overload was detected in the regenerative resistance (PSMR alarm indication: 08). Thermostat operation or short-time overload was detected. The regenerative resistor was disconnected or an abnormal resistance was detected. Decrease the acc/dec duty. Check the cooling conditions (peripheral temperature). If the cooling fan stops, replace the resistor. If the resistance is abnormal, replace the resistor.
Check applications. Check PSM fan. Replace fan or PSM unit