On the control print are three state LEDs:
LED |
off |
on |
flash |
state description |
green |
0% |
no supply voltage |
||
90% |
inverter not running |
|||
50% |
hard fault; green & red alternate |
|||
10% |
inverter running |
|||
red |
0% |
no fault |
||
50% |
fault state |
|||
yellow |
0% |
no SD card inserted |
||
100% |
access to SD card (short); SD card error (permanent) |