– 17 –
Out of Balance Protection
Before spinning, control will initiate a short agitate cycle to re-distribute clothes.
1.
Spin cycle begins. At 100 RPM, control will sense for an unbalanced load.
2.
If an unbalance is sensed, the control will go back to step #1, add time to timer and try again. If no
3.
unbalance is sensed, accelerate to 300 RPM.
At 300 RPM, control will again sense for an unbalanced load.
4.
If an unbalance is sensed, the control will go back to step #1, add time to timer and try again. If no
5.
unbalance is sensed, accelerate to 650 RPM.
Note: Control will keep trying steps 1 through 5 until it is successful in accelerating past 300 RPM or until a total
of 12 minutes for the middle spins or 34 minutes for the last spin has been added to the timer. At the 12 or 34
minute point, the control will quit trying and move to the next cycle or stop operation if it was the last spin.
6. At 650 RPM, if OoB phase is greater than set limit, the control will fi nish out the spin cycle at this speed. If it
is within limits, it will accelerate to 1150 RPM.
7. At 1150 RPM, if OoB phase is greater than set limit, the control will fi nish out the spin cycle at this speed. If it
is within limits, it will accelerate to 1350 RPM.
8. At 1350 RPM, if the OoB phase is above the set limit, it will de-accelerate to 1150 RPM and continue at that
speed until cycle times out.
Note: Control will execute the above scenario for each spin in wash cycle. If 34 minutes needs to be added to
timer after the fi nal spin the control will log an “UE” error code to the service mode.
Out of Balance Mode
Start
Winding
Current RPM
== 100 rpm
If RPM == 650
Phase Duty > Limit
Keep current RPM
Stop
*Sense unbalance
Unbalance value
> Limit
Accelerate RPM
*Sense Resonance
Unbalance value
> Limit
Current RPM > 300
Stop
Accelerate RPM
If RPM == 1150
Phase Duty > Limit?
Accelerate RPM
If RPM == 1350
Phase Duty > Limit?
Spin time == 0
Start
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
No
No
Yes
No
*To check balance, the main PCB utilizies motor duty
cycle data (sensing resonance), and senses RPM
fl uctuation (sensing unbalance).