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Old 11-25-2019, 05:55 PM   #51 (permalink)
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I actually don't know it can't be more than 10 amps.
But this time I am going to extend the wires and put my DC amp clamp on it.
For protection I am going to install a 3 amp diode in reverse bias across the + and -, an MOV and maybe a 12v light bulb.
The 12v light bulb will do 3 things. It it will let me know the 12v is functional, will be like a charge bleed resistor to help smooth voltage on inductive loads and it will let me know if there are any 12v spikes indicated by it getting brighter for a split second.

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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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Old 12-04-2019, 06:03 AM   #52 (permalink)
EV convert
 
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Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 8,037

Sub - '84 Chevy Diesel Suburban C10
SUV
90 day: 19.5 mpg (US)

camaro - '85 Chevy Camaro Z28

Riot - '03 Kia Rio POS
Team Hyundai
90 day: 30.21 mpg (US)

Bug - '01 VW Beetle GLSturbo
90 day: 26.43 mpg (US)

Sub2500 - '86 GMC Suburban C2500
90 day: 11.95 mpg (US)

Snow flake - '11 Nissan Leaf SL
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Now I lost a fan and it's safety interlocking the high voltage DC system.
Apparently the fans this thing uses are not regular fans, they produce a "go , no go" signal.
So if one of them quits it shuts down the high voltage side.
Hopefully I can find one of these fans. I really don't like the idea of bypassing a safety on something like this.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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Old 12-04-2019, 07:59 AM   #53 (permalink)
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How many wires and what voltage on the fans? Plenty of PC cooliyfans have a third wire that is a tachometer. I have no idea if thatís the same as your setup, but it could be.
Iíve also disassembled a few small fans over the year and repaired them by using parts from incorrectly sized fans.
Just some thoughts. Hope you can get it back up on workyon the cheap.
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Old 12-04-2019, 08:46 AM   #54 (permalink)
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Join Date: Jul 2011
Location: NewMexico (USA)
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Sub - '84 Chevy Diesel Suburban C10
SUV
90 day: 19.5 mpg (US)

camaro - '85 Chevy Camaro Z28

Riot - '03 Kia Rio POS
Team Hyundai
90 day: 30.21 mpg (US)

Bug - '01 VW Beetle GLSturbo
90 day: 26.43 mpg (US)

Sub2500 - '86 GMC Suburban C2500
90 day: 11.95 mpg (US)

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That's what I'm expecting. I haven't taken it apart yet.
I believe the fans are 240vac or 24vdc, cause they still come on with no 12v. I could make 120v work if needed.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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Old 12-05-2019, 05:24 AM   #55 (permalink)
EV convert
 
oil pan 4's Avatar
 
Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 8,037

Sub - '84 Chevy Diesel Suburban C10
SUV
90 day: 19.5 mpg (US)

camaro - '85 Chevy Camaro Z28

Riot - '03 Kia Rio POS
Team Hyundai
90 day: 30.21 mpg (US)

Bug - '01 VW Beetle GLSturbo
90 day: 26.43 mpg (US)

Sub2500 - '86 GMC Suburban C2500
90 day: 11.95 mpg (US)

Snow flake - '11 Nissan Leaf SL
SUV
90 day: 124.63 mpg (US)
Thanks: 183
Thanked 2,592 Times in 2,025 Posts
It's working now.
I found a little nut plate that doesn't appear to belong to this rig inside the problem modular power inverter. I took the module out and heard something move around inside it and shook free a little square nut plate.
Put it back in and it works fine.
Some how that nut caused a non catastrophic fault that shut it down and doesn't appear to have caused any damage.
That could have gone so bad so fast.
Some how I avoided disaster.
Maybe that's what shorted out my 12v power supply. The little nut plate is to large to fall inside through the air cooling holes.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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Old 12-05-2019, 11:05 AM   #56 (permalink)
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A lot of power supplies now have short protection in the output. Short it and it shuts down. If it's relatively stupid, you'd never know why.

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