This is a EV100 with a transistor and the 3 blue capacitors. I think the capacitors must charge up when the key is turned on then the main line contactor (+ batt.) gets a signal from the card (wire 24) to close the contactor. After sitting, with the key off, then turned on, the capacitor only charges to about 40 volts and the contactor does not turn on. Code -51 shows (caps. not charging). The card is not sending the negitive signal to the contactor coil. If I push the contactor in it will turn on and stay on. The capacitor is then at 50 volts (batt. voltage). If I pull the plug with the 24 wire (little 1/2" square plug) off the card and plug it back in it will turn the main line contactor on even if the capacitors were only at 40 volts. Everything is fine until parked with the key off for a few minutes and then the capacitors slowly loose their charge and drop below 40 volts and it will not come back to life when the key is turned back on. Bad card??? Thanks for any help.
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friend before start to check capacitors remember this,you will not have full charging on them before main contactor closed but i have this on my vehicle with battery 80v they charge on 75-76v and in that very fast moment card check errors.Try without bat to check motors and power part in most cases problem is there but if you seen that everything is ok than you must to check card.Tell as what are you do please.
It's a EVT100 and I did find information by Google, thanks John. Like nemanja says, the capacitors must get charged up to battery voltage when you turn the key on and then the card turns on the main line contactor. For some reason they aren't getting up high enough. I will check the capacitors tomorrow, one of them may have a problem.
Are you sure its not an EV200 system?
it kind of sounds like it from your description
the control card is very similar to the EV100
the differences are in the components on the panel such as multiple head capacitors inline with each other and the layout of the scr's etc.
you can google for the information and it can be found easily ;o)
From my experience you must to find where is problem with low voltage because charging of 40v is bed.If is battery 48v I thinks it is you need about 48-50v on +pole of capacitors than you will not have error 51 and you will get -minus pole from electronic card for main contactor.I dont know tcm and this solution but i will try to look in documents to se did i have wiring for this unit.Try to solve low voltage first,that is my proposition.And good luck of course!
One more thing starting up electronic goes like this.You have 48v on main switch where goes two wires one on power part one on control,control check for errors and if everything is ok gives signal to contactor to close and second + wire goes to power part and charge capacitors.Most electronic units works like this.I think that you understand me.
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