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4.9 "FUCS"
(Fast Unbalance Control System)
The control procedure for unbalanced loads is performed dynamically, before each spin cycle, as follows:
•
The phase starts with the inversion rotation of the drum at a speed of 55 rpm.
•
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 400 ms, the balance is calculated and compared with predetermined limits. If the value is
less than the lower limit, the speed of the drum is increased by 2 rpm; if the value is higher, the speed of
the drum is reduced by 2 rpm. The reduction in the speed of the drum distributes the washing 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 four steps: each phase is characterised by a value of
unbalancing threshold and by a time out (max. time)
Step 0: The zero phase has a preset unbalancing threshold; if correct balancing is achieved, the appliance
performs a spin pulse at 470 rpm, preceded by 5 sec at 100 rpm and followed by phase 1;
otherwise, after a maximum of 60 seconds the function passes to step 1.
Step 1: The first phase has a different preset unbalancing threshold; if correct balancing is achieved, the
appliance performs the spin cycle, preceded by 5 sec at 100 rpm. Otherwise, after a maximum of
120 seconds, the function passes to step 2.
Step 2: The second phase is characterised by a different unbalancing threshold: if correct balancing is not
achieved within 60 seconds, the function passes to step 3.
Step 3: The third phase has a preset unbalancing threshold: if correct balancing is achieved within 90
seconds a spin pulse is performed, preceded by 5 sec at 100 rpm and followed by a new step 1;
otherwise, after a maximum of 90 seconds, the function passes to a new step 1.
If the unbalancing value remains excessive at the second attempt during step 3, the spin cycle is
skipped; if the balancing is not correct a reduced spin is performed.
4.9.1
Examples of operation of the unbalancing control function
The following examples refer to an appliance with a final spin speed at 1000 rpm.
Load correctly balanced
Low speed
FUCS phase 0 and pulse
Low speed
FUCS phase 1
Normal spin
TSE-P 02.00 EB
25/60
599 35 24-30
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