X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 09 Aug 2011 07:55:38 -0400 Message-ID: X-Original-Return-Path: Received: from wolverine.webiness.com ([65.61.103.66] verified) by logan.com (CommuniGate Pro SMTP 5.4.1) with ESMTPS id 5086304 for lml@lancaironline.net; Tue, 09 Aug 2011 01:31:17 -0400 Received-SPF: none receiver=logan.com; client-ip=65.61.103.66; envelope-from=brent@regandesigns.com DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=default; d=regandesigns.com; h=Received:Message-ID:Date:From:User-Agent:X-Accept-Language:MIME-Version:To:Subject:Content-Type:Content-Transfer-Encoding; b=aexevHor+eqfH8iEsS091Elo5uZaVVCxztXDKiJq0a7VCOznOzECiXi9yRFix9FWrV5zK74k1M+6bl+ovu5fQOc/dQbsGpKOgcXas2WOGnN7MHDGmQrkNEp/wls8B8ri; Received: from 207-170-226-178.static.twtelecom.net ([207.170.226.178] helo=[192.168.1.101]) by wolverine.webiness.com with esmtpa (Exim 4.69) (envelope-from ) id 1Qqet6-0005c8-CG for lml@lancaironline.net; Mon, 08 Aug 2011 22:30:00 -0700 X-Original-Message-ID: <4E40C5FD.2030706@regandesigns.com> X-Original-Date: Mon, 08 Aug 2011 22:30:37 -0700 From: Brent Regan User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 X-Original-To: Lancair Mailing List Subject: Re: Kind of frustrated because of my AC.. Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - wolverine.webiness.com X-AntiAbuse: Original Domain - lancaironline.net X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - regandesigns.com Ronald laments:<<< my AC breaker (50AMPS) trips as soon as I get airborne, taxing is not a problem, run up is ok too. >>> I suspect that my friend Dr. Katz is correct that there is insufficient cooling for the condenser causing higher overall system pressure leading to a higher pressure ratio and higher compressor current, tripping the breaker. Other possibilities include: Excessive freon charge, leading to a high system pressure. Defective expansion valve. Defective breaker. Poor voltage regulation from the electrical system. High sustained RPM causes higher voltage leading to higher compressor current. Undersized wiring causing a large voltage drop resulting in compressor stall. Poor connection at the breaker leading to resistance heating and tripping at lower than rated current. Low buss voltage caused by gear hydraulic pump (HPU) and AC compressor running simultaneously. Or it could be something else... Regards Brent Regan