⚫ 
Off: No power is supplied. 
⚫ 
Blinking green at 1 Hz: 
−  The input is normal, and the server is 
standby. 
−  The input is overvoltage or 
undervoltage. 
−  The PSU is in deep hibernation 
mode. 
⚫ 
Blinking green at 4 Hz: The firmware is 
being upgraded online. 
⚫ 
Steady green: The power input and 
output are normal. 
⚫ 
Steady orange: The input is normal but 
there is no output. 
NOTE 
The possible causes of no power output are as 
follows: 
⚫ 
Power supply overtemperature protection 
⚫ 
Power output overcurrent or short-circuit 
⚫ 
Output overvoltage 
⚫ 
Short-circuit protection 
⚫ 
Device failure (excluding failure of all 
devices)