Been seeing a couple AB drive panels that sit side by side, same (very close) amp readings but one enclosure has been running overtemp since day one when it was installed. The drive keeps dropping out with an overtemp fault. The air exhaust is moving through both enclosures at the same rate. One enclosure obviously has warmer feeling air passing though. I'm not seeing anything with conductor terminations. The latest prints showed the correct parameters in it also.I recomended a drive guy to inspection for help. Quetion is, been seeing this same issues at other plants. Anyone deal w/this?  

---

Cary Weaver
cary.weaver@owenscorning.com
DoUSeeGreen.com
Predictive Technician
Thermology L3

I have drives on just about all my hvac fans and pumps and the over temps usually comes from the fan in the drive and or a dirty heat sink.some have filters installed on the intake,which get forgotten or drawn in.Another over heating issue has been due too the line and load being run in the same conduit,although that also faults as over volt from induced voltage between lines.

---

John Cannamela
ASNT II Vibration/ Level II Thermographer
HVAC Journeyman
Owner ISC Building Diagnostics
http://www.infraredsurvey.com www.iscbuildingdiagnostics.com
jc@iscbuildingdiagnostics.com