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Operation
14
F232061
Theory of Operation
(Continued)
Conditions Monitored
by the Computer
•
Door
–The computer continuously
monitors the open/locked status of the
door. If it detects that the door is open
during a wash cycle, it immediately aborts
the cycle and executes the stop routine.
•
Power
–If power is interrupted long
enough for the computer to go off, after
the power is restored, the display briefly
flashes “Hold” to indicate the interruption.
The door unlock will be disabled to keep
the door from being opened while the
basket is still turning.
•
Balance
–The computer monitors the
balance signal provided by the AC drive
during drain steps. It will attempt to
optimize the load seven times before
skipping the programmed spin for the
extract step. The dot at the top of the
leftmost display digit will light following
the final unsuccessful attempt.
•
Water level
–The computer attempts to
maintain the water level programmed for
the fill preceding the agitation step. If the
level falls below the programmed level, the
computer will stop the time countdown
and re-energize the fill valves until the
level is restored.
•
Water level in a heat step
–In order for
the computer to energize the heat output,
there must be at least a low water level in
the machine. If this minimum level is not
detected, the heat output will be turned off
until the required level is restored.
•
Temperature probe problem
–If the
temperature sensor fails when prompted
for degrees Fahrenheit, the computer
flashes “tSFL” in PROGRAM mode rather
than showing the temperature. If the
temperature sensor fails when prompted
for degrees Celsius, the display will read
“-17C” rather than showing the
temperature.
The following table, entitled “Display
Indications,” lists the various displays and
what they mean. The operator should become
familiar with these computer displays.