With the A10 code, also check the contact pins in the multi plug that connects into the LT200, if the pins are corroded, or look like they have been spread where the connector has been un-plugged several times. This is a common code, it may be just a flat battery! Any more problems, let us know.
Hello
The system is locked off if the voltage is inadequate ( discharged battery)
Possible cause of the fault
1. The battery is discharged
2. The battery is loaded during an idle voltage measurement,e.g. by an additional unit such as a hydraulic system.
3. The battery is defective or has a cell short-circuit
Cheers