For Internal Office Use Only
9.1 SIGNAL MEASURING AT THE DRIVER
CONTROL UNIT
1. Self-test
Before the drive control unit is operable, it executes a self-test. This self-test starts
automatically after switching on the machine with key switch.
If, during this self-test, the drive control unit detects an error, the LED on the unit
flashes to signal non-operability. The machine will then not start riding.
Key switch ON -> the b signal has to apply at A4:X51:2.
Then the self-test starts and the result is signalled by the LED of the drive control unit.
Only if the LED lights permanently, the drive control unit is operable. If the LED
flashes, check for possible causes of error with the table below.
