Hi,
Long story short, in my stupidity, I shorted the display pins on my 1000W 52V Luna BBSHD kit when completing the reassembly (working too late...). It sparked and fried the Ground pin on the green male display HiGo connector. I replaced the main loom and the display fires up but displays battery voltage at 0% (34V or so). A direct voltage test of the battery shows it's charged to 54V which is as expected. No error codes appear on the display however (display is an APT 750C).
I've since opened up the controller (no visible signs of damage) and run continuity tests across all wires. I only have basic electronics skills but have compiled results of the tests in a Google sheet you can view here:
https://docs.google.com/spreadsheets/d/1PEr33IpozqLP6BMsR8CdvjRWFWnI-qQkxPYdGrnyJEQ/
I'm getting stable resistance readings on all the battery ground to phase wires and climbing resistance on the positive to phase wires so it looks like the mosfets are OK. I get no continuity between the ground wire on the 4-pin plug in the controller and the battery ground so am assuming the circuit has shorted somewhere in here.
Can any experienced folk confirm my suspicions here and take a guess whether the controller is actually fried if I'm not getting error codes on the display? Is it likely that an SDM on the PCB has failed? If so, I'll order a replacement controller from Luna but I'd also be keen to try and effect a repair on this controller as a hobby project down the line. I'm assuming if its an IC that's probably not possible but a simpler component might be replaceable yes?
Thanks in advance,
Matt
Long story short, in my stupidity, I shorted the display pins on my 1000W 52V Luna BBSHD kit when completing the reassembly (working too late...). It sparked and fried the Ground pin on the green male display HiGo connector. I replaced the main loom and the display fires up but displays battery voltage at 0% (34V or so). A direct voltage test of the battery shows it's charged to 54V which is as expected. No error codes appear on the display however (display is an APT 750C).
I've since opened up the controller (no visible signs of damage) and run continuity tests across all wires. I only have basic electronics skills but have compiled results of the tests in a Google sheet you can view here:
https://docs.google.com/spreadsheets/d/1PEr33IpozqLP6BMsR8CdvjRWFWnI-qQkxPYdGrnyJEQ/
I'm getting stable resistance readings on all the battery ground to phase wires and climbing resistance on the positive to phase wires so it looks like the mosfets are OK. I get no continuity between the ground wire on the 4-pin plug in the controller and the battery ground so am assuming the circuit has shorted somewhere in here.
Can any experienced folk confirm my suspicions here and take a guess whether the controller is actually fried if I'm not getting error codes on the display? Is it likely that an SDM on the PCB has failed? If so, I'll order a replacement controller from Luna but I'd also be keen to try and effect a repair on this controller as a hobby project down the line. I'm assuming if its an IC that's probably not possible but a simpler component might be replaceable yes?
Thanks in advance,
Matt