KitchenAid KDTM354E, Technical Education, Page: 107 / 122

TESTING
KitchenAid 2015 Microfiltration Dishwashers
n
6-7
For Service Technician Use Only
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.
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. Check door latch mechanism for obstructions
or binding. Verify door seal is seated properly. Check
for interference between dish racks and door. Repair as
necessary.
2. Unplug dishwasher or disconnect power.
3. Remove outer door panel to access door latch and remove
toe and access panels to access control board.
Strip Circuit – Door Switch
4. Check door switch contacts and all connections in the
door switch circuit. Visually check that the P9 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.
5. Disconnect connector P9 from the control board.
6. Using an ohmmeter, measure across P9, pins 5 and 6 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.
7. Using an ohmmeter, measure across P9, pins 5 and 6 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.
8. Set voltmeter to DC and connect red lead to test-pad P9-6
(13V) and black lead to P13-4 (DC GND) on the control
board.
9. Plug in dishwasher or reconnect power and with door
open, verify that 13 VDC is present across P9-6 and P13-4.
¾
If 13 VDC is not present, replace the control and retest.
¾
If 13 VDC is present, proceed to step 10.
10. Reconnect P9 to control board and perform Diagnostic
Cycle to verify operation.
11. Unplug dishwasher or disconnect power.
12. Reassemble all parts and panels.
13. Plug in dishwasher or reconnect power.
4
Control Pinout
Meter Check of Loads and Fuses
Dishwasher Strip Circuits
The following individual circuits are for use in diagnoses. Do not continue with
the diagnosis of the appliance if a fuse is blown, a circuit breaker is tripped, or if
there is less than a 120-volt power supply at the wall outlet.
■
Unplug dishwasher or disconnect power.
■
Perform resistance checks. To check resistance of a component,
disconnect harness leads first.
Door Switch
Wash/Rinse
Water Heating/Heat Dry and Water Sensing with O.W.I. Sensor (Water/Air/Soil/Temperature)
Pump is washing. Control monitors temperature during water heating periods. See “Wash/Rinse” and “Water Sensing with O.W.I. Sensor (Water/Air/Soil/
Temperature)” circuits.
Fill
(Top)
W2
P5
P6
P7
P8 P9
P10 P11
P12
P13
-4 -3 -2 -1 -2 -1 -1 -6 -9
-1
-6 -1
-6
-1 -5 -6 -1 -3 -5 -1 -2 -4 -6 -1 -3
(OWI)
P12 (Wide Out)
P13
P4
P5
P6
BR
P7
BU
P8
RD P9
V
P10
BR
P11
RD
P12
YL
Ω
of F9 Triac Fuse
Electronic Control
Electronic Control
Micro Pin Micro Pin Micro Pin Micro Pin
K4
Motor (N) Relay K3
Heater (L1) Relay K2
Pilot (L1) Relay
K1
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
P9-5
P10-4
Door
Switch
P9-6
13V
V V
Motor Power
BK
N.O.
TURQ
(LBU)
K2
Pilot L1 Relay
(Also see Door
Switch Circuit)
Electronic Control
P4-2
P5-2
Pin 3 Pin 2
K4
Motor N Relay
(Also see Door
Switch Circuit)
WH
P5-1
P4-1
Sense Resistor
or Jumper
0
Ω
N
L1
V
Y
Y
AUX
Winding
6
Ω
- 10
Ω
CAP
23.5 µF
Run
Winding
3
Ω
- 7
Ω
Motor and Capacitor
(Wash Pump)
120V, 60 Hz, 190W typical
TURQ
(LBU)
Electronic Control
N.O.
L1
BK
Electronic Control
N.O.
K3
Heater L1 Relay
(Also see Door
Switch Circuit) Hi-Limit
Thermostat
Opens
207°F - 217°F
(97°C - 103°C)
Heater Element
8
Ω
- 30
Ω
120V, 60 Hz
785W Wet
500W Dry
N.C.
P4-2
P4-3 P4-4
P4-1
N
Electronic Control
N.O.
K1
Heater N Relay
(Also see Door
Switch Circuit)
Electronic
Control P12-6
P12-5
P12-4
P12-3
P12-2
P12-1
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Measure NTC resistance at P12-1 and
P12-3 connector disconnected from control.
Turbidity Drive
Foam Drive
OPT Sig
VCC
Ref
NTC
O.W.I. Sensor
Temperature: NTC Thermistor
46K
Ω
- 52K
Ω
at 77°F (25°C)
11K
Ω
- 13K
Ω
at 140°F (60°C)
Heater
BU/RD BU/RD BU/WH WH
YL
YL
YL
YL
YL
YL
L1
BK
P4-2 P6-4
P10-1
P6-6
P6-7
P6-9
P4-1
Use top hole of jumper
W2 as test point for F9.
N.O.
K2
Pilot L1 Relay
(Also see Door
Switch Circuit)
Fuse
F9
Electronic Control
Electronic Control
Float
(In normal position,
holds switch closed.)
BR BR
N.O.
Pin 3 Pin 1
Overfill
Float Switch
No test pad on P6-4.
Recommend using test pad on P10-1.
No test pad on P6-7.
Recommend using test pad on P6-6.
Electronic Control
Float Switch
Input
BR BR
Pin 3 Pin 1
Triac
Fill Valve
890
Ω
- 1,090
Ω
120V, 60 Hz, 6W
WH
N