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Author Topic: NEC Overtemp Warning Jim Cassedy Phenomenal Film Handler Posts: 1661 From: San Francisco, CA Registered: Dec 2006 posted 06-20-2016 07:10 PM                     I logged in remotely to an NEC 3200S at a theater after they told me their tail lights were red and there was an "over temp" warning on the LCD display. But when I go through the error & temperature logs, I see nothing really out of the ordinary, & there is no "specific" over temp warning activity on any of the sensors. (DMD, Bulb, Exhaust, LPSU, etc) Alarm had already cleared by the time I remotely logged in, but they said this happened yesterday too. Any idea what's going on here? Shows are running OK, but..... I don't like to ignore warnings! >I know we've been having extra high temperatures here on the West Coast yesterday and today, but I don't have any reason to believe it's any hotter in the booth than usual. They have good Air Conditioning.  |  IP: Logged Justin Hamaker Film God Posts: 2253 From: Lakeport, CA USA Registered: Jan 2004 posted 06-20-2016 09:41 PM                        Is the roof exhaust fan fully operational? Is there an external fan on top of the projector which might be failing? A switch for a roof exhaust which is getting accidentally turned on - or a breaker not getting turned on? For the warning to go away on it's own suggests some kind of environmental issue.  |  IP: Logged Jim Cassedy Phenomenal Film Handler Posts: 1661 From: San Francisco, CA Registered: Dec 2006 posted 06-20-2016 09:55 PM                     Unfortunately, Justin, I can't get to that theater tonight. I've asked the staff the same questions you brought up, but to be honest, they know nothing about anything and there's also a language barrier, so talking to them is rather useless. After my last post, however, I re-logged back into the projector, & I see that the "over-temp" alarm WAS defined, but I just missed seeing it the first time because I was busy 'multitasking' several other things when they called. AH HA! Here's a good clue to the cause! I've got a projection-tech friend of mine to head over there and takalooksee at exactly what's going on.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 06-20-2016 10:10 PM                     It'either lamp house filters or exhaust blower... From the NEC Error Code List for Error 171 1. Check the ambient temperature. It should be 35 degC or lower. 2. Check if there is any problem on suction air and exhasut air. 3. Check the air filter clogging. 4. Check if the ventilation system is operated with required specification. 5. Check the TSENS PWB  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 06-21-2016 09:52 AM                     Everytime I've had an NEC overtemp, it was the exhaust not pulling enough air. Fix the exhaust and likely the error will go away (except the NC900...it overtemps on the intake). That error (171) points to the LPSU complaining on its input and since it is a 3200, that is a separate power supply. I'd check it to see if its intakes are clogged and that your room temp is reasonable (below 80-degrees).  |  IP: Logged

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