Huawei Technologies Co. Ltd PRU11WIFI 用户手册

DBS3900 LampSite 
Installation Guide 

6 Installing an RHUB 

 

Issue 08 (2016-05-30) 

Huawei Proprietary and Confidential         

Copyright © Huawei Technologies Co., Ltd. 

57 

 

Power-on check involves high-voltage operation. Be cautious when conducting the power-on 
check. Any direct contact with the input voltage or indirect contact through damp objects 
might endanger your life.   

Step 1  Measure the RHUB earth resistance.   

The RHUB earth resistance is less than 
10 ohms 

Go to 

.   

The RHUB earth resistance is equal to 
or larger than 10 ohms   

Find out the cause and ensure that the resistance 
meets requirement. Then, go to 

.   

 

Step 2  Measure the voltage of the RHUB.   

The external power supply ranges from 
100 V AC to 240 V AC   

Go to 

.   

The external power supply does not 
range from 100 V AC to 240 V AC   

Find out the cause and ensure that the resistance 
meets requirement. Then, go to 

.   

 

Step 3  Power on the RHUB. Wait 3 to 5 minutes, check the status of the RUN indicator of the 

RHUB after the RHUB runs properly.   

Steady on 

The power supply is 
normal while the board 
is faulty.   

Power off the RHUB, and power on it 
again after rectifying the board fault.   

Steady off 

There is no power input 
or the board is faulty.   

Power off the RHUB, and check the power 
input again. Rectify the board faulty and 
power on the RHUB again if the power 
input is normal.   

On for 1s and off 
for 1s 

The devices work 
properly.   

End the operation.   

On for 0.125s 
and off for 
0.125s 

The board software is 
being uploaded. 

Power off the RHUB if the uploading is not 
finished in 5 minutes, and check whether 
the configuration file is correct. Power on 
the RHUB again after the fault is rectified.