Huawei Proprietary and Confidential                                     
Copyright © Huawei Technologies Co., Ltd. 
 
Abnormal external conditions 
have triggered converter 
circuit protection inside the 
SUN2000. The possible causes 
are as follows:   
 
Reason ID = 4 
A sharp drop in grid 
voltage or a short-circuit 
has occurred, resulting in 
high output current from 
the SUN2000. 
 
Reason ID = 13 
A sharp drop in grid 
voltage or a short-circuit 
has occurred, resulting in a 
fault in the voltage check 
circuit of the SUN2000. 
 
Reason ID = 14 
A sharp drop in grid 
voltage or a short-circuit 
has occurred, resulting in 
instantaneous high output 
current from the SUN2000. 
 
Reason ID = 16 
The grid DC current 
exceeds the allowed range. 
 
Reason ID = 17 
The grid voltage or 
frequency is abnormal. 
 
Reason ID = 20 
The SUN2000 output 
short-circuits, leading to a 
sharp increase in output 
current. 
Reason ID = 4, 13, 14, 16, or 17 
a.  The SUN2000 monitors its 
external working conditions in 
real time and automatically 
reverts to normal operating status 
after the fault is rectified. 
b.  If the alarm occurs repeatedly, 
contact Huawei technical 
support. 
Reason ID = 20 
a.  Check whether the SUN2000 
output cables are short-circuited. 
Rectify any fault. 
b.  If the alarm occurs repeatedly, 
contact Huawei technical 
support.