Fill Circuit; Wash Circuit - Dexter Laundry WN0675 Parts And Service Manual

Agitation Circuit
When the 12VDC signal closes the K5 in the Control PCB it closes the loop in the yellow wire from the
VFD terminal MI6 back to the DCM on the white/yellow through the stop button. This enables the Drive to
operate and allow motion. If the K5 is not closed or the Aux Stop Button is engaged there will be no motion.
A proximity sensor is used to verify that the cylinder is turning when the VFD is commanded to operate. If
the VFD frequency is greater than 0 Hz and the proximity sensor has no change in output for 10 seconds,
the error code "NO PROX SENSOR OUTPUT" is displayed. The K7 Closes supplying 120VAC on the red/
brown to energize the Drain Valve. This supplies power to close the valve. The main control PCB sends
data commands to the VFD through the data cable connected at P-2. These commands control all wash
cylinder movement. The type of agitation is programmed in the control settings.
o Agitation type: Normal, delicate, or 3 custom options
o Agitation time
o Spin speed
o Spin time
Fill Circuit-Warm Stage
During the machine fill, a 12VDC signal is sent on the blue wire from the J8-1 connection of the main con-
trol PCB to the pressure switch common contacts. This 12VDC returns on the blue/yellow wire for low level
and blue/red wire for high level.
NOTE: Unlike the other previous Dexter washers, with O-Series Controls the empty signal is an open cir-
cuit, full is a closed circuit.
The washer fills the tub through the back of the machine with either one or both the C1/C3 cold and H1/
H3 hot water fill valves. From the P4 connection of main relay PCB, 120VAC is sent out of the K4 relay
on the red/pink wire to the C1/C3 cold water fill valve. 120VAC is sent out of the K1 relay on the red/grey
wire to the H1/H3 hot water fill valve depending on the programmed bath temperature. If the washer does
not initially reach low water level within 7 minutes the cycle will continue and "SLOW FILL ERROR" will be
displayed alternately with the Cycle Progress screen. (This is the case unless "None" is chosen for fill level).
The alternating "SLOW FILL ERROR" will be displayed the rest of the cycle even when the "CYCLE DONE"
screen is displayed. It will reset when the user opens the door.
If the "SLOW FILL ERROR" occurs after 7 minutes and the water level is still not met at 15 minutes, the
washer will come to a controlled stop. The current stage will end, and the cycle will not continue. The
"SLOW FILL ERROR" will be displayed on the screen until reset. Even on high fill, as long as the low water
level is met one time during a stage, the "SLOW FILL ERROR" will not be displayed during the remainder
of the stage. This includes if the low water level is met before 7 minutes, then drops again and requires ad-
ditional filling.
Soap Dish flush / Injection Signals
The signal for the Detergent, Softener, or Injection Signals are programmable to engage for 0 to 150 sec-
onds. By setting up the injection or flush in the programming, a 120VAC signal will be sent from the main
or secondary relay board to a specific flush valve or injection terminal on the back of the machine. The Hot
Detergent flush is powered from the Red/Black of the main relay board. The Cold Softener flush is powered
from the Red/Violet of the main relay board. All Injection Terminal Strip signals are powered from the Grey
wires of the secondary relay board. All 120VAC neutral is carried through the white/red wires.
The Detergent Flush, Softener Flush, or Injection Signal start time is selectable from 0 to 150 second delay.
The start time of the delay count down is dependent on the settings of the Delay Fill option. This Delay Fill
option is a global setting which affects all stages of all cycles. The default setting is Delay Fill enabled which
means that the Compartment flush or injection signal delay time will not start counting down until AFTER
the low level fill has been achieved. (If the setting is changed to "disabled", then the countdown will begin
from the beginning of the stage.
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Part # 8533-126-001 11/21