Controller wont power

[zirawyz]

I got an Ebke kit of 1000w motor, 48v battery and a 48v controller. everything went smooth except, the controller wont power on when i connected it the 55v charged
battery, as i know after search, this controller can handle ~56v to 60v. I opened it, after multimeter test all 12 mosfets showed same rating, and the IC regulator as well,
nothing looks burned or small. I don t know what to check else?
Anybody can help out by some tech. guidelines, or tips? I will appreciate that.
some parameters:
Mosfets data name : 110N7F6
IC Regulator: LM 317T V6

 

[harryS]

You're starting way too deep in the tech details. Most all controllers have a start wire that either goes to handlebar display, a on/off button. or a keyswitch. Only a few power up when the battery is connected.

 

[zirawyz]

You're starting way too deep in the tech details. Most all controllers have a start wire that either goes to handlebar display, a on/off button. or a keyswitch. Only a few power up when the battery is connected.

before I mounted the motor, battery ....I tested on the ground all those controller output cables for 5v and so on, no power at all .

 

[harryS]

Well, 5 volt power has nothing to do with the Mosfets. It comes from DC-DC converters powered by 48V, and you need to have that battery power going to the controller. Most of them have a single input lead that needs to be connected to battery power. This is usually switched by your display or an on/off switch.

Since you understand circuits, you can see a representative circuit in the top left. The power siwtch applies battery power to the controller's DC converters.

 

[zirawyz]

You're starting way too deep in the tech details. Most all controllers have a start wire that either goes to handlebar display, a on/off button. or a keyswitch. Only a few power up when the battery is connected.

Thanks, Harry for the tip (LCD was not connected to close the circuit.)

 

[zirawyz]

Thanks again Harry for the tips.
I disconnected completely the wireless bms (away from circuit) n placed the old s14 bms (after i shorted #12 n13 harness connectors together to convert it to s13 BMS?) it looks working, I tested each cell from the harness to C- or P-,the meter shows equal voltage in each block, but when i connected battery with the bike kit, the lcd start to show " flushing empty battery icon" motor start turns,but for short time n stops....
If I connected the battery discharge terminal to bms p- instead of c-, is this can cause this message?

 

[harryS]

Whether you can use a 14S BMS on a 13 battery pack depends on the BMS. Some will work if you short the top leads. Some won't. Maybe you have one that doesn't work that way. It sure appears not to be working, if you don't get the full pack volatge from the C- and P- pins to B+.