Error Message:

DRUM: Hall mode overspeed error - possible TPU failure

Applies to:

• All

Service Information:

Noise on the hall sensor cable from the motor to the drive amp, can make it look as though the motor is turning really fast. Check for conducted electrical noise on the AC input lines to the machines. Check for secure AC connections and things like arc welders on the same circuit.

Check cable between J2 on drum amp and back plane, Possible MPE or back plane failure,

Check Hall led sequence on drum amp to make sure that all hall sensors are working properly.

Operator Action:

Reset the machine.

Cause:

• Firmware senses high motor speed based on the tach signal that is fed from the drum amp which is the combination of the Hall commutation sensors in the motor.
• In Hall mode, if the velocity excedes DRUM_MAX_HALL_VELOCITY (150 rpm) then this error is reported.

See Also:

• Other: Troubleshooting information