Error code #04

i have GEM car 72 volts, when i switch it on it shows the error code 04, what does it mean ? anyone can help me on this? thanks in advance…

#4 is the code for hand brake. That’s all I know. Just had same problem.

I get an error code -4 also and when I plug the charger in I get a red LED slowly blinking light. I just replaced the six batteries.

Flashing red lite means batt. too low to charge. Must discon. and charge each battery individually. 4 code may be just because the batt.too low.