7 – 10 Repair manual SWE100, 120, 120L, 120S, 140, 140L, 200D © BT
Troubleshooting
Error codes
T code Valid from serial no. Date Order no.
841×842×843 6061850- 2012-08-30 258946-120
3.121
Safety speed, raising and lowering the
forks not working.
The transistor regulator cannot use the
internal memory.
• Internal transistor regulator error.
• Restart the truck.
• Reprogram the truck.
• If the error persists, change the
transistor regulator.
3.140
Horn disabled. Safety speed. The horn output is short-circuited.
Check:
• connections and wiring harness
•cable 50
• the horn.
3.501
The main contactor is open. Faulty transistor regulator.
Check:
• the transistor regulator.
• factory parameter 1001 (Truck type).
If the error persists, change the
transistor regulator.
3.502
The main contactor is open. The logic card in the tiller arm handle
cannot download parameters to the
transistor regulator.
• Restart the truck.
• Replace the logic card in the tiller
arm handle.
• If the error persists, change the
transistor regulator.
Code Event Possible cause
Action
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