I have a Crown RC3020-30 forklift that is losing its forward and reverse. Most of the time I can unplug the battery and plug it back in and it will work, or sometimes I have to wiggle the battery connection for it to kick in. The lift function and everything else works all of the time just as it should, i'm only losing the travel. With my handset I am getting a code of -48.
I have changed out the 1 REC, 3 REC pigtail, Capacitor, FWD/REV switches and contactors, potentiometer, plugging contactor at the very bottom, high speed contactor and even the lift contactor. I also changed out the card with another forklift. I have also bypassed the deadman switch and the brake switch to eliminate that as an issue.
When it runs, it runs great but if you stop to grab something or talk to someone for just a couple minutes, it is like it loses all power to go forward or reverse but it can still lift.
The battery is only a couple of months old but I changed out their housing connections as well to verify that wasn't it. I am completely lost at this point, I have looked at every wire I can think of for a short but have yet to find anything. Like I said, if I unplug the battery, and then slowly plug it back in sometimes moving it up and down, it will all of a sudden work but it doesn't take long to lose it again.