Basic Washer Operation - GE Profile Technical Service Manual

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BASIC WASHER OPERATION WASH, RINSE, EXTRA
RINSE AGITATION MODES:
The main wash functions are still accomplished
through a single or two speed motor, hot and cold-
water valves, and a pump. The components are
controlled by the electronic control, pressure
switch, and rotary or push button (high end) se-
lector switches.
Basic specifications for the motor, pump
and water valves are:
.FILL: timed 20 minute maximum
.AGITATION: 12 minutes
.PUMP OUT:3 minutes
.SPIN: 3 minutes
.RINSE FILL: timed, 40 minute
maximum
.RINSE: 3 minutes
.PUMP OUT: 3 minutes
.FINAL SPIN: 6 minutes
Electrical:
.Motor: 1/2hp, 10 amps, 70 amps in-rush,
120VAC
.Pump: 3.2 amps, 120VAC
.Water Valves: 0.1 amps each, 120VAC
Relays are 12V DC
The lid switch pauses all washer operations ex-
cepting water fill, when the lid is raised. The lid
switch cuts power to the D.C. relay coil for the
motor.
The pressureswitch is in series with the AC power
line of both water valves. The two wire system for
the pressure switch, reads OPEN with water in
the tub.
WASHER MODES:
FILL:
Fill mode activates the water valves according to
temperature selected. The cycle advances to the
next mode as soon as the pressure switch opens
(trips). A fail safe system is built into the control
to prevent serious flooding due to a failure in the
pressure switch system. The fill is timed, and the
water valves de-energized after 40 minutes if the
pressureswitch has not been tripped. At that point
the cycle stops and pauses. If the user changes
temperature during fill, it occurs immediately at
the change. The fill LED light is on in wash and
rinse, when the washer is filling.
Wash, rinse, and extra rinse operate the motor
in agitate at the selected wash speed. Relays
switch speed, motor direction for spin or agitate,
and main power to the motor. When speed is
changed and the motor is running, relays go
through the turn off sequence, and then turn on
at the newly selected speed. During the wash
fill, one of four lights will be on, indicating selec-
tion, and progresses as the cycle advances.
The wash light remains on during pump and spin
when the washer is in the rinse cycle. The rinse
and extra rinse lights are on during fill, rinse,
and pump, while the washer is in the extra rinse
cycle.
DRAIN PUMP OUT:
The control board has circuitry that detects
through the pump control relay, a measurement
of current of the pump motor. That current de-
scribes the torque the motor is outputting. That
measurement can determine if the pump motor
is pumping water, and when it is finished pump-
ing water and is pumping air.
Multiple samples of the current reading are taken
by the PCB, and if acceptable allow the cycle to
continue to spin. If it didn't meet the proper read-
ings, PCB will continue to sample, up to a pe-
riod of 3 minutes. If after 3 minutes the PCB
doesn't detect a decrease in the pump current,
but the pressure switch reset, the spin mode will
be started. If during the spin, the pressure switch
trips, the PCB will revert back to pump mode for
a second 3 minute pump period, and looks for a
decrease in current. If that is not successful the
PCB will put washer in idle. This could be indi-
cator of a pump motor that is blocked, or a
standpipe too high.
IDLE:
The idle mode has no LED's or relays on, the
control is waiting for the consumer to touch a
keypad or switch.
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