3-18
n
Maytag Chopper Dishwashers
TESTING
For Service Technician Use Only
User Interface (UI)
This test will check the wiring to the user interface and the
user interface itself. The following items are part of the user
interface circuit.
n Harness/Connecon
n User Interface (UI)
n Status LED (On some models)
n Control Board
Test Procedure
1. Verify that the control lock-out feature has not been
turned on by the customer. If unit will not run or power
up, perform Power Check procedure on page 3-6. Also,
check for excessive condensaon on UI parts due to vent
and/or fan problem.
2. Unplug dishwasher or disconnect power.
3. Remove outer door panel to access control board.
4. Disconnect user interface connecon from control board.
Verify all other connecons to the control are good.
5. Open dishwasher door.
6. Plug in dishwasher or reconnect power.
7. Wait at least 7 seconds for control to power-up
completely.
8. Close dishwasher door and monitor control response:
¾ If control is OK, it will respond by turning on the drain
motor for 2 minutes. Replace user interface assembly.
¾ If control is not OK, it will not turn on the drain motor.
Wait for at least 10 seconds. If sll no drain response,
then replace control or LCD display module (whichever
one the UI was connected to).
9. Unplug dishwasher or disconnect power.
10. Reassemble all parts and panels.
11. Plug in dishwasher or reconnect power.
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.
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