Sinclair SDV4 series - Page 62

72 Troubleshooting
2.4 LED on PCB instructions
LED1: Malfunction indicator lamp of inverter module. The lamp will be off if the system running is normal.
And it will be on if the inverter module is faulty and the error code will display on digital tube.
LED2: Running indicator lamp of inverter module. The lamp will be on if the system running is normal.
LED 1 (Red)
LED 2 (Green)