Wheels, Drive System 121
Service Manual – Scrubtec R 253 - RA40
Troubleshooting
Trouble
Possible Causes
Remedy
The machine does not move
Battery voltage too low
Charge the battery
Speed potentiometer (RV1) incorrectly regulated or
broken
Replace
Function electronic board (EB1) faulty
Replace
Wiring damaged
Check all connections inside the
electrical component compartment,
included those of the function
electronic board
Drive system motor (M3) carbon brushes worn
Replace
Drive system motor (M3) faulty
Replace
The electromagnetic brake (BRK) is faulty
Replace
The electromagnetic brake (BRK) is not
engaged when the machine stops
The electromagnetic brake locking/unlocking lever is
turned to unlock position
Turn the lever to lock position
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