Electrics Posted February 22, 2011 Share Posted February 22, 2011 We have a plane that has the H3 a/c pack and it goes full hot in auto. I can control it in manual. I ahve changed the Anti-ice vlv, the Water Seperator Sock, the Anticipator Stat, The Temp control box and followed the FI. All the wiring is ohming good, but I still have the problem. I was wondering if anybody here could help. The plane is an 85 model. Quote Link to comment Share on other sites More sharing options...
Plaprad Posted February 22, 2011 Share Posted February 22, 2011 Have you messed with the Water Seperator anti-ice sensor yet? That or the duct temp sensors are about all I can come up with. Quote Link to comment Share on other sites More sharing options...
Electrics Posted February 22, 2011 Author Share Posted February 22, 2011 I will give it a whirl oh and we did change the hi-limit stat but it still is inop I will try the anti-ice-sensor. Quote Link to comment Share on other sites More sharing options...
bischoffm Posted February 23, 2011 Share Posted February 23, 2011 Always question the reliability of the Anticipator stats. Get the drawings and ensure all are working IAW. Quote Link to comment Share on other sites More sharing options...
tinyclark Posted February 24, 2011 Share Posted February 24, 2011 If it drives cold when you short the pins at the anticipator stat IAW the FI, then I would grab a stat from another A/C, or put that one in another A/C and Op Check it. Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted February 25, 2011 Share Posted February 25, 2011 When you say you can control it Manually does that mean in Manual it does not go full hot on its own or you can drive it in both directions? Turn it on and allow it to sit and see what it does. If it gets hot drive it cold and wait...see if it returns hot or ??? Quote Link to comment Share on other sites More sharing options...
Electrics Posted February 25, 2011 Author Share Posted February 25, 2011 It started working with the APU. But when we ran engines it drove full hot. So we started to close the bleeds with only two bleeds open it would maintain warm not balls to the wall hot. So we changed the flow control and SOV and it fixed it, but only after we changed the turbine, Temp control vlv C/P and the anticaptor stat anti-ice vlv. So what it boils down to is the flow control vlv fixed it it was weird but a learning experience. Thanks to all who replied it helped. Quote Link to comment Share on other sites More sharing options...
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