Angie, We had a similar problem, hope this will help: 1) (easiest check) Check that your coolant level has not dropped, and that coolant circulation pump is working, etc. 2) If the Heat Exchanger flux filtration unit has accumulated a lot of flux, this will cause insufficient cooling and your parts will come out hot, possibly even still in the liquidous state. Cleaning your filter will remedy this. If this is the case, make sure your "Cal. Control" temp limit is not set too low (should be 70 or 80 deg. C), if at 60, extreme flux accumulation will result. Also, you can set the "Cal. Controller" alarm limits tighter so if the heat exchanger gets clogged and the temp rises it will alarm before reaching the overtemp condition. We did this, but we wanted a better process indicator so we implemented the KIC profiling system, which allows constant real-time profile monitoring, with very tight alarm settings. I would suggest you call Heller, Dave Jenkins, ph:973-377-6800 for help. Good Luck United Technology Electronic Controls Jeff L. Hempton, Sr. SMD Engineer E-mail: [log in to unmask] ______________________________ Forward Header __________________________________ Subject: [TN] Fwd: reflow oven Author: Derrick Smith at Carrier-HUN-CED1 Date: 7/13/98 11:36 AM Hi techies, We just purchased a new oven (Heller 1900w) it is 12 zones. We are not using the first two zones only using 10. The machine set up is 80,100,110,120,140,150,170,175,230,265 and conveyor at 65. The profile looks good, peak temp at 220, max rise at 2/sec total time above is between 50 and 60 sec. My problem is when the board exit the oven they are very hot! I mean these things are flexing, is this normal for a 12 zone reflow oven or are we doing something wrong? Any help would be appreciate Thanks Angie Quadrus Sr Process Engineer [log in to unmask] ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################ ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################