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I have an APC SRT6KXLI with 3 SRT192BP . they are working online with 230v output voltage .
but it has a fault with this message on it's LCD :
int. comn. fault .
internal communication fault
how can i fix it ? i upgrade my ups but didn's solved !! should i upgrade SNMP card ?
( this fault occurred after upgrading the snmp card )
this screen shot belongs before updating the snmp.for more information when the snmp was updating on "restrarting the snmp interface" the updating application stop and errored.
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