393 has a letter followed by a 3 digit code for errors
ex L236 = working hydraulics fault
T184 = traction fault

a 336 series do not show the operator the error codes (im assuming you mean 323232 which is something in the software for the meter itself not the electrical system)

back to the 393
what you are probably seeing is the time that has elapsed since the maintenance timer set off the "service required (wrench symbol)" indicator
this isnt a fault, just a reminder to service the truck (change oil, grease, etc)
if linde never serviced it or they didnt ever turn the light off youll find that number + 50 will bring you to your total hours on the machine (the first service comes at 50 then its supposed to be set to 500 there after)
to me it looks like the wrench light has been on 2198 hours since the timer first came back on

go back and check that # again
youll probably find its slowly increasing

the 336 you probably have a wrench light on which means the same thing, not an error

both have to be reset by the linde dealer or by someone who has the proper laptop software and cables