Dacor Dishwasher - Specific Component Troubleshooting; Floor Guard F9 Issues; Inlet Valve Performance

95
The red LED will be illuminated if a “Drain” or “Water in Base Pan” failure is detected. See page 69
for description of failure codes.
Floor Guard F9
The oor guard assembly is welded to the base and consists of three components: a microswitch, a
styrofoam oat, and a metal housing spot welded to the base. If water is present in the base area,
the oat will rise and at predetermined height, trigger the microswitch and open the circuit, at this
time the unit halts, and the drain pump operates.
The oor guard detects water in the base area. As water accumulates in the base area the oat
rises, activating the NO oat switch, and closing the circuit between pins 1 & 2 on terminal P8 on
the power board.
If water is present, repair or replace the faulty component and dry the base area. Check for water
damage. Insure that all components are dry and retest.
If there is no water, there may be a problem with the circuit.
1.
Ensure that the styrofoam oat moves freely in the housing. Slide a credit
card or similarly sized object under the styrofoam oat and lift. An audible clicking
should be heard when lifted and when released
2. Remove the Power Board and check the two leads at P8 for continuity. If open, with
oat clearly in the untriggered position, the problem has been isolated to the circuit
between the lead and up to the microswitch. Check the wiring and the switch.
Replace the faulty component.
The oat should be replaced if it has been damaged in any way. Replace it by lifting the retaining
tab on the back of the housing.
Inlet Valve
The inlet valve is located on the left side of the base area, looking in from the front. The inlet side
of the valve is connected to the house water supply, usually the hot side. When the inlet valve
is energized with 120VAC at pin 1 on terminal P7 of the power board, the valve retracts a small,
spring-loaded internal plunger with a rubberized tip, and allows water to ow through. The inlet
valve is powered by the control board and power board as necessary. See Wash Cycle Data Chart
on page 44, to conrm appropriate cycle times.
If tank fails to ll, or inadequate water ow is detected when valve is energized, check the follow-
ing:
1) Check the water supply valve, usually located under the sink for proper ow
and operation.
2) Check the resistance between pin1 on terminal P7 & Neutral. It should read
between 850 & 940 ohms.If the circuit is “open” then check the wiring before
replacing the valve.
3) Check the ow rate of the valve by disconnecting the outlet hose (Clear
plastic) and put into a 2 gallon container. With the valve energized you should
see between 1 to 1.5 gallons accumulate in the container in 60 seconds,
with a house supply pressure of 20-120 PSI.