
Service
Manual
9406
31. Speed Guard
FLE/FLE MP
Description
The purpose of the speed guard is to protect the
wash motor during extraction.
On the motor output shaft there is a polarised
magnet element (wash motor on 120 litres; spin
motor on 220 litres) which is sensed by the speed
guard. When the extraction motor has reached a
certain speed the speed guard sends a signal to the
automatic unit and the power is cut. The wash motor
is reconnected when the extraction motor speed has
dropped and the wash motor cannot be damaged
through connection.
On the 220 litres machine the two motors are
disconnected. The speed guard cuts the power to
the electromechanical connection on the output shaft
and the extraction motor can speed up without being
followed by the wash motor. When the speed guard
has disconnected the two motors a signal is sent to
the wash motor to run at distribution speed. This is to
protect the ball bearings of the wash motor against
vibrations from the extraction.
The speed guard has a potentiometer for the
adjustment of the cutout point and an LED which
indicates when the cut out point has been reached.
Repair instructions
Speed guards should be replaced, as repair is not
recommended.
1. Remove speed guard.
2. Install new speed guard and adjust position
according to illustration.
3. Run machine at distribution speed. NOTE: the
machine must be run at the correct frequency.
4. If the distribution relay does not chatter the guard
may be too high. The speed guard should
therefore be adjusted too low as a starting point to
adjustment. Screw the potentiometer
anticlockwise until the relay chatters. The speed
guard can then be adjusted by turning the
potentiometer clockwise until the distribution relay
ceases to chatter.
1
31
1
2435
LED
Adjustment pot
Place of magnet
Fig.
1
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