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NetCol5000C-11kW

Publication Date:  2018-01-30 Views:  43 Downloads:  0
Issue Description

The customer recently installed Fusion Module 800 with two Netcol 5000 11kW AC units. We have now installed our equipment in the
racks. The equipment is generating a heat load but the AC is not operating as expected.

The AC units begin to cool when the cold aisle temperature reaches around 26°C. The cold aisle is then cooled to 20°C,
the cooling then switches off and the temperature rises to around 26°C. This cycle then repeats.


Here is a graph of the cold aisle
temperature using the log data from ECC800.

 

 

The software version of the ACC is  V200R001C10SPC200_en and of the ECC is ECC800V100R001C40SPC400

 

 

 

 



Alarm Information

When the customer wanted to set point the temperature to 20 degrees it received an error:

 

"Failed to set signals"

 

Handling Process

We have asked the customer to gave us the ACC logs and history alarm , after we have check it , we found the software version was not compatible with software version of the ECC800.

That's the reason the customer can't modify the parameter  

 

Root Cause

Software version of the ECC800 -ECC800V100R001C40SPC400 is not compatible with software version of the ACC unit ACC V200R001C10SPC200_en and we have asked the customer to upgrade the ACC unit to version Huawei_ACC_V200R001C30SPC200_NetCol5000-A011 in order to be possible to modify the set point parameter and to have as he would expect the AC unit to keep the temperature of
the cold aisle to a temperature close to the Set Point value and not fluctuate to a value 3 degrees above and then cool to 3 degrees below. The customer expected 
a temperature curve like this chart. 


Solution

Solution: To upgrade the ACC unit to version Huawei_ACC_V200R001C30SPC200_NetCol5000-A011 and to set the parameter of Temp p-band from value 3 to value 2.

END