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jurekorgurek
01-08-2009, 01:55 PM
Hi all,

Please help me how to solve this alarm?

Thanks very much
marc5180
01-08-2009, 02:26 PM
Are your chilled water pumps running?
jurekorgurek
01-08-2009, 03:22 PM
Are your chilled water pumps running?
yes, It control by VFD.
Does this critical alarm?
Sandro Baptista
01-08-2009, 05:21 PM
We need more data...

The alarm is actived based in what circunstances? low water flow? low outlet chilled water?

Are the pumps "feeling" a big pressure at the outlet maybe by a clogged filter or stop valve closed?
This would mades the VFD down the flow rate if the operating VFD is based on the pressure. However if the operating of the VFD is based on the differential pressure (pump outlet minus inlet) this shouldn' happened

Give us more information

Baptista
cool_tech
02-08-2009, 10:34 AM
hey,
whats your minimum hz on your drive? your drive should not go below 15hz. also do you have any faults on your vfd?