Hi All, I thought I would post a bit of an update
I tried a brand new hairball that I borrowed from a friend – the new hairball also reported errors 1141 and 1124 when I tried to accelerate in any gear. I had fused both contactor sense connections to the hairball, resulting in longer wires running between the contactor terminals and the hairball Connecting the hairball directly to the contactor with as short a wire as possible resolved the issue, which suggests it may have been a matter of induced noise in the measurement, of too short a duration for my DMM to have picked up. The noise issue likely hasn’t been sorted out, just that it is no low enough that the hairball doesn’t fault Matt Sent from Mail for Windows 10 From: Jukka Järvinen Sent: Thursday, 3 September 2020 7:04 PM To: Electric Vehicle Discussion List Cc: Matt Subject: Re: [EVDL] Zilla 1141 error - 15mV drop across contactor at 100A High power demand under acceleration could indicate current leaking to the motor hull and messing up the car chassis ground (?) Brush dust issues have kept me troubled too many times with weird problems. -Jukka to 3. syysk. 2020 klo 13.01 Matt via EV ([email protected]) kirjoitti: Hi Brains Trust, I have a Z1k LV. My hairball gives me errors 1141 and 1124 when I try to accelerate in any gear (worst in 5th, and least bad in 1st) The manual tells me 1141 is contactor high resistance. my DMM measuring the voltage across the battery and controller inputs to the hairball puts the voltage drop at 15mV for 100A (battery amps that is). Which looks about right for a good contactor The contactor always drops out when I turn the ignition off, and my DMM measures 92v across the contactor (measured at the hairball terminals). My conversion is 96v nominal (actual battery voltage is 102v, though the little white light on the hairball must act as a voltage divider, dropping 10v) I opened the hairball, and it looks clean inside - nothing looks damaged visually. Any ideas on what to check next? Is it possible to see what the hairball is measuring as the voltage drop across the contactor? thanks in advance, Matt Sent from Mail for Windows 10 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20200907/7d2cd3b4/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
