---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 10/24/11: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:05 AM - Z16 schematic 5 amp CB is popping. please help. (Geoff Heap) 2. 07:50 AM - Re: Z16 schematic 5 amp CB is popping. please help. (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 07:05:44 AM PST US Subject: AeroElectric-List: Z16 schematic 5 amp CB is popping. please help. From: "Geoff Heap" I have wired my 701 as per Z16 schematic for the Rotax. Up until now, as I have needed power to test the panel I have put my S700-2-10 switch in the middle battery position and then turned on the main switch for power to the main bus. Nothing remarkable happened. All was well. Now I am ready to start my Rotax 912ul for the first time. I put my S700 switch up to the full on battery/alternator position. OK so far. Now I flip on the main power switch as before to power the main bus but this time the 5 amp circuit breaker pops within about a second. This has happened every time I have tried it. I spent several hours yesterday checking the connections to the S10, the S704 Alternater OV disconnect, rectifier and capacitor. They seem to be correct. Any serious rework would need the panel opened up. I'm talking Can Opener Any thoughts on what wiring mistake could cause the circuit breaker to pop? I understand what a difficult question this is to answer based on the info I have given. However, I'm hoping this could be an obvious no brainer fix to you experts. Possibly a common error for electrical idiots. Please phrase any advice as you would for a 5 year old. Secondly. What is the downside of removing the S704 Alternator OV disconnect entirely..Geoff -------- Dual controls. Dynon 180. Icom 210 Garmin 296. Becker transponder. Sigtronics intercom. Electric flaperons. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=355861#355861 ________________________________ Message 2 _____________________________________ Time: 07:50:19 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Z16 schematic 5 amp CB is popping. please help. At 09:01 AM 10/24/2011, you wrote: > >I have wired my 701 as per Z16 schematic for the >Rotax. Up until now, as I have needed power to >test the panel I have put my S700-2-10 switch in >the middle battery position and then turned on >the main switch for power to the main bus. What 'main switch'? >Nothing remarkable happened. All was well. Now I >am ready to start my Rotax 912ul for the first >time. I put my S700 switch up to the full on battery/alternator position. That doesn't need to happen until after the engine is started. >OK so far. Now I flip on the main power switch >as before to power the main bus but this time >the 5 amp circuit breaker pops within about a >second. This has happened every time I have >tried it. I spent several hours yesterday >checking the connections to the S10, the S704 >Alternater OV disconnect, rectifier and >capacitor. They seem to be correct. Any serious >rework would need the panel opened up. I'm talking Can Opener If the engine is not yet running, then the system power is supplied by the battery at some value below 13.0 volts. I seems that the ov protection is tripping as some level of voltage much lower than it's design point of 16.4. >Any thoughts on what wiring mistake could cause the circuit breaker to pop? >I understand what a difficult question this is >to answer based on the info I have given. >However, I'm hoping this could be an obvious >no brainer fix to you experts. Possibly a >common error for electrical idiots. Please >phrase any advice as you would for a 5 year old. I'm having trouble visualizing the switches you describe. Are you wired per Z-16 with no additional switches? >Secondly. What is the downside of removing the >S704 Alternator OV disconnect entirely..Geoff No OV protection. 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