Alliance Laundry Systems UF35PV - Manual (Page 26)

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Operation
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Balance Detection
The washer-extractor may be equipped with either of
two balance detection systems: (1) a balance sensor
detection system or (2) an inverter drive balance
detection system.
Balance Sensor Detection
If the washer-extractor is equipped with the balance
sensor detection system, the optical sensor installed on
a bracket on a shock absorber signals the computer to
slow the washer-extractor when an out-of-balance load
occurs during extract.
If the balance sensor is tripped, the out-of-balance
LED indicator located in the upper left corner of the
first digit of the display will light and will remain
lighted until the end of the extract step. This indicator
tells the operator that an out-of-balance condition
existed during an extract step. The washer-extractor
will attempt to balance three times during an extract
step.
If on the third attempt the out-of-balance condition
continues, the washer-extractor will advance to the
next step. (If the next step is another spin step, it will
be skipped also.)
Inverter Drive Balance Detection
If the washer-extractor is equipped with the inverter
drive balance detection system, balance is detected by
the inverter drive during a drain step as opposed to an
extract step. The WE-6 microcomputer will make up
to seven attempts to balance the load during a drain
step. During the final balance attempt, the out-of-
balance LED indicator located in the upper left corner
of the first digit of the display will light. The indicator
will remain lighted until the drain step is complete.
If on the seventh attempt the load is not balanced, the
washer-extractor will continue to the next step in the
cycle following the drain step that is not a spin step.
Therefore, if one spin step or two or more consecutive
spin steps follow, all will be skipped if seven attempts
to balance the load in the drain step fail. High speed
steps include medium, H1, H2, and H3 spin steps.
NOTE: The computer cannot advance through a
drain step, nor will the computer allow starting a
cycle in a spin step.
NOTE: A drain step must be programmed prior to
a high speed step to allow for inverter drive balance
detection. Otherwise, spin steps will be skipped by
the computer.
If the washer-extractor is equipped with the inverter
drive balance detection system, a special balance
switch serves to remove power to the machine. This
means that if the washer-extractor balance “passes” the
inverter drive balance detection system at the drain
step but the balance switch detects an out-of-balance
load condition at the extract step, power will be
removed from the washer-extractor.
At this point, the LED display goes blank on the WE-6
microcomputer, and the washer-extractor coasts to a
stop. Such a condition indicates a serious problem.
Contact a service technician before attempting to
restore power to the washer-extractor.