For Service Technician Use Only
COMPONENT TESTING (Cont.)
Whirlpool
®
and KitchenAid
®
Filtration and Maytag
®
24" Microfiltration Dishwashers
n
3-23
Interior LED Lighting (some models)
This test will check the wiring to the LED tube lights and the lights
themselves. The following items are part of the LED Tube Lights
circuit:
n
Harness/Connection
n
LED Tube-lights (2)
n
Control Board
Under normal operation
•
The Interior LED Lighting is not on during the wash cycle.
•
The Interior LED Lighting turns on when the door is opened
and remains on for 10 minutes.
Test Procedure
NOTE:
The two (2) LED Tube-lights are wired in parallel. It is
possible for one light to malfunction and the other to remain
operational.
Strip Circuit -Interior LED Lighting
1.
Open dishwasher door. The Interior LED Lights should
turn on. The following steps assume that this step was
unsuccessful.
2.
Unplug dishwasher or disconnect power.
3.
Remove toe and outer door panels to access control board.
4.
Visually check that the P9 connector on the control is
securely installed.
¾
If visual passes, go to step 5.
¾
If the connector is not inserted properly, reconnect and
retest Interior LED Lighting.
5.
Disconnect P9 from the Control Board.
6.
Measure each LED light individually using the diode check
setting on the multimeter. Meter should display a numeric
reading from anode to cathode and "OL" reading from
cathode to anode (refer to strip circuit below).
¾
If LED check passes, go to step 7.
¾
If any of the LEDs do not pass the check, replace the
defective LED individually and retest Interior LED lighting.
7.
Set voltmeter to DC and connect red lead to P9-3 and
black lead to P9-4 on the control board. Plug in dishwasher or
reconnect power.
8.
Measure for 13 VDC between P9-2 and P9-4 with lights
disconnected and door opened. Light output must be
measured within 10 minutes of opening the door.
¾
If 13 VDC is not present, replace the control and retest.
¾
If 13 VDC is present, proceed to step 9.
9.
Unplug dishwasher and 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.
Electronic Control
P9-4
Electronic Control
P9-3
Ref
13 VDC
Light
Pin 3
Pin 1
A
C
Pin 3
Light
Pin 1
A
C