For Service Technician Use Only
COMPONENT TESTING (Cont.)
Whirlpool
®
and KitchenAid
®
Filtration and Maytag
®
24" Microfiltration Dishwashers
n
3-9
Door Switch Circuit
Perform the following checks if the dishwasher does not detect
the door open or closed. This test will check the wiring to the
door switch and the door switch itself. The following items are
part of the door switch circuit:
n
Harness/Connection
n
Door Switch/Latch Assembly
n
Control Board
Test Procedure
1.
Check for improper installation of the dishwasher or leveling.
2.
Check door latch mechanism for obstructions or binding.
Verify door seal is seated properly.
3.
Check for interference between dish racks and door. Repair as
necessary.
4.
Unplug dishwasher or disconnect power.
5.
Remove outer door panel to access door latch and remove
toe and access panels to access control board.
Strip Circuit - Door Switch
6.
Check door switch contacts and all connections in the door
switch circuit. Visually check that the P12 connector on the
control and the door latch connector are securely installed.
¾
If visual check passes, go to step 5.
¾
If any of the connectors are not inserted properly,
reconnect and retest door latch/switch.
7.
Disconnect connector P12 from the control board.
8.
Using an ohmmeter, measure across P12, pins 9 and 11 with
the door closed, strike completely in latch mechanism (switch
closed).
¾
If 3 ohms or less is measured, proceed to step 7.
¾
If high resistance is measured when door is closed, check
for loose connections and repair as needed.
9.
Using an ohmmeter, measure across P12, pins 9 and 11 with
the door open, strike removed from latch mechanism (switch
open).
¾
If reading is infinite, go to step 8.
¾
If reading shows continuity, or door switch is damaged,
replace door switch and retest.
10.
Set voltmeter to DC and connect red lead to test-pad P11-7
(13 V) and black lead to P10-2 (DC GND) on the control board.
11.
Plug in dishwasher or reconnect power and with door open,
verify that 13 VDC is present across P11-7 and P10-2.
¾
If 13 VDC is not present, replace the control and retest.
¾
If 13 VDC is present, proceed to step 10.
12.
Reconnect P12 to control board and perform Diagnostics
Cycle to verify operation.
13.
Unplug dishwasher or disconnect power.
14.
Reassemble all parts and panels.
15.
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
Electronic Control
Micro Pin
Micro Pin
Micro Pin
Micro Pin
K502
Motor (N) Relay
K505
Heater (L1) Relay
K503
Pilot (L1) Relay
K504
Heater (N) Relay
N.O.
N.O.
N.O.
N.O.
(To Wash Motor)
(To Heater)
(To Wash Motor,
Vent, and Triac Loads)
(To Heater)
N.O.
Door
Switch
Sensing
Input
Ref
Door
Switch
P12-9
13 V
V
V
P12-11
P10-2
Содержание M-17
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