Traction problems, Fault Code 331
Hello guys, i have a big problem with a Crown Forklift, i hope that you can gift me ideas to solve it.
The machine a day cut off traction when the machine was in movement and saved the 331 fault, i revised the service manual and i found that this fault correspond to the Traction encoder, I enter in programing mode and i revised the input A2.21, but the encoder counts normally, i revised the voltage in the wires on the encoder and Access 3, but its normal. Then i got a new encoder and i replaced for made a test, but the problem and fault continue, the machine cut off traction at medium speed and i should turn off and turn on for reactivate the traction, i dismounted the traction motor because i saw the brushes and slip ring in bad condition, i rectified the slip ring and replaced the brushes, but the problem continue, when i was making a revision on the electric wires, i disconnected the back up alarm (Alarm 2) and the machine shows a new fault about the alarm, but i saw that when i disconnect the alarm the machine reduce the traction speed, i think that this is a automatic protection, when the speed is reduced the machine doesn't show the 331 fault and doesn't cut off traction, i made this test with traction with in the air, i was happy because i though that the machine can works in this condition, but when i returned the machine on the floor although the speed was reduced the fault and cut off continued.

I though in the battery and i got a new battery and i made some test, but the problem didn't solve. What do you think? Maybe the Access Control 3?

Thanks for your help, i appreciate it.