Fucs - Electrolux TC2 Service Manual

11.12 "FUCS"

(Fast Unbalance Control System)
The control procedure for unbalanced loads is performed dynamically, before each spin cycle, as follows:
The phase begins at a speed of 55 rpm; the speed can never fall below this threshold, otherwise the check
is repeated.
At intervals of 300 ms, the balance is calculated and compared with pre-determined limits; if the value is less
than the minimum limit, the speed of the drum is increased by a certain value depending on the
transmission ratio between motor pulley/drum; if the unbalancing is higher, it is decreased by the same
value. The reduction in the speed of the drum distributes the laundry correctly; this procedure is repeated
until the wash load is completely balanced.
Correct balancing of the wash load is achieved at a speed of 115 rpm, after which the spin cycle begins.
The Unbalancing Control function takes place in different phases: each phase is characterised by:
an unbalancing index (0-1-2-3)
an unbalancing threshold value (e.g.: 850, 350, 650, 1100 rpm)
a time out (max. time)
•
Ending of the FUCS balancing phase
The phase is ended when:
The drum rotation speed is 115 rpm (or 85rpm in some cases of unbalancing index). In this case the spin is
performed.
In some cases the optimal balancing value is not reached: a reduced spin is performed depending on the
unbalancing.
In the worst case scenario, in which all phases are not sufficient to reach a minimum balancing value, the
spin is not performed.
• Example of perfect balancing
Phase 0,
Time-out=60 sec
55 rpm
SOI/DT 2010-03 dmm
Selected speed
Phase 1
Time-out=60 sec
115 rpm
Real speed
56/78
599 72 84-41