Bosch WFC Series Service Information Manual page 22

OPERATION – Sensors (7)
Unbalanced Load Sensor (2 Step
Detection)
• Accurate measuring of unbalance by
deviation of spin speed and slow
down time of drum.
• Infinite adapting of spin speeds.
• Compensates reducing spin speeds by
prolonging spinning times.
• Will attempt up to 15 times to
redistribute a load.
Advantages:
• Reduction of noise.
• Better stability of machine.
• Good spinning results with big
unbalances.