Service Manual

3-8
n
18” & 24” ADA Built-In Dishwashers
TESTING
For Service Technician Use Only
Water Inlet Valve
This test will check the wiring and components in the ll
circuit. The following items are part of the ll circuit.
n Harness/Connecon
n Water Inlet Valve
n Control Board
Test Procedure
1. Verify water supply is turned on and supply line
is adequate. Check for water siphoning out of the
dishwasher (improper drain connecon). Check for debris
in water line or ll valve inlet screen. Check for proper
oat switch operaon. Repair as necessary.
2. Unplug dishwasher or disconnect power.
3. Remove access panel. Remove control board cover to
access control board.
4. Unplug connector CN5 from control board.
5. Check the inlet valve and harness—using an ohmmeter,
measure the resistance between CN5-1 and CN5-2.
¾ If the resistance is approximately 24 ohms, the water
inlet valve and harness are good. Go to step 7.
¾ If outside the range, replace the inlet valve.
¾ If an open circuit is detected, check connecons and
harness connuity between control and inlet valve (see
Figure 1). If good, replace the inlet valve.
Figure 1 - Water Inlet Valve
6. Reconnect CN5 to control board.
7. Set voltmeter to DC and connect lead black lead to CN5-1
(EV1) and red lead to CN5-2 (IS) on the control board. Plug
in dishwasher or reconnect power.
8. Start the Service Mode Test and at step-1 measure for 12
VDC out of the control between CN5-1 and CN5-2. (Refer
to the Water Inlet Valve Strip Circuit below.)
IMPORTANT: The Water Inlet Valve must be connected to
the control board to measure voltage accurately!!!
¾ If 12 VDC is not measured, replace the control board
and retest.
¾ If 12 VDC is measured and water inlet valve is
energized, go to step 9.
9. Check water level switch, harness, and connecons.
Replace or repair as necessary.
10. Unplug dishwasher or disconnect power.
11. Reassemble all parts and panels.
12. Plug in dishwasher or reconnect power and run Service
Mode Test to verify repair.
DANGER
Electrical Shock Hazard
Only authorized technicians should perform
diagnostic voltage measurements.
After performing voltage measurements,
disconnect power before servicing.
Failure to follow these instructions can result in
death or electrical shock.
STRIP CIRCUIT - WATER INLET VALVE
Figure 2 - Water Inlet Valve Strip Circuit
CONTROL BOARD
24 Ohms
WATER INLET VALVE
CN5-2
CONTROL BOARD
CN5-1
WATER INLET VALVE
SWITCH
12V
GND
(IS)
(EV1)
BUBU