KitchenAid KDTM354E, Technical Education

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6-16
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KitchenAid 2015 Microfiltration Dishwashers
TESTING
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.
Lower Spray Arm Motor
This test will check the wiring to the spray arm motor and the
spray arm motor itself. The following items are part of the
lower spray arm motor circuit.
n
Harness/Connection
n
Lower Spray Arm Motor
n
Control Board
Test Procedure
1. Check for and remove anything blocking the lower spray
arm (utensils, pot handles, etc). Verify that the filters are
installed properly and not impeding spray arm rotation.
Also, check for clogged spray nozzles and clean as needed.
2. Perform the Service Diagnostic Cycle to check the
operation of the lower spray arm motor. The lower spray
arm motor should be energized during Intervals 13, 12,
and 11. The following steps assume that this step was
unsuccessful.
NOTE: If present, the CLEAN LED will turn on during the
intervals listed above if the spray arm motor is working. A
faulty lower spray arm motor will generate an error code
F9E4.
Strip Circuit – Lower Spray Arm Motor
3. Are all the loads controlled by TRIACs not working?
¾
YES – check for open door switch, TRIAC fuse, or pilot relay.
¾
NO – just the spray arm motor. Go to step 4.
4. Unplug dishwasher or disconnect power.
5. Remove toe and access panels to access control board.
6. Unplug connector P8 from control board.
7. Check the spray arm motor—using an ohmmeter, verify
the resistance values as shown below.
Motor Harness Windings (ohms)
P8, Pins 3 & 1 (CW) 1890-2310 ohms
P8, Pins 3 & 6 (CCW) 1890-2310 ohms
¾
If the values are within the ranges listed, the spray arm
motor and harness are good. Go to step 8.
¾
If outside the range or inconsistent from winding to
winding, replace the spray arm motor (diverter assembly).
¾
If an open circuit is detected, check connections and
harness continuity between control and spray arm motor.
If good, replace the spray arm motor (diverter assembly).
8. Reconnect P8 to control board.
9. Set voltmeter to AC and connect leads to P8-1 & P8-3 on
the control board. Plug in dishwasher or reconnect power.
10. Start the Diagnostic Cycle and during intervals 13, 12, and
11 check for AC out of the control between P8-1 & P8-3
(CW motor winding). NOTE: In this application, only the
CW motor winding is used.
IMPORTANT: The Lower Spray Arm Motor must be connected
to the control board to measure voltage accurately!!!
¾
If 120 VAC is measured during CW rotation, go to step
11.
¾
If no AC voltage is measured, replace the control board
and retest.
11. Unplug dishwasher or disconnect power.
12. Reassemble all parts and panels.
13. Plug in dishwasher or reconnect power and run Diagnostic
Cycle to verify repair.
5
Drain
Dispenser (Detergent and Rinse Aid)
Diverter Valve
Water Softener
Controlled Lower Spray Arm (on some models)
Drying
For Heated Dry, heater is also running. See “Heater” circuit under “Water Heating/Heat Dry and Water Sensing with O.W.I. Sensor (Water/Air/Soil/Temperature)”.
L1
BK
P4-2
P6-3
P10-1
P6-1
P4-1
BR BR WH
N 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
No test pad on P6-3.
Recommend using test pad on P10-1.
Pin 1 Pin 3
Drain Motor
15
Ω
- 25
Ω
120V, 60 Hz, 45W
Triac
N
WH
P4-1
Pin 1 Pin 3
Electronic Control
Use top hole of jumper
W2 as test point for F9.
N.O.
K2
Pilot L1 Relay
(also see Door
Switch Circuit)
P4-2 P9-3 P9-1
BK
L1
V
V
P10-1
Fuse
F9
Dispenser Wax Motor
1.4K
Ω
- 2.8K
Ω
120V, 60 Hz, 10W
Pin 1
Pin 5
Test pad on P9-3 might crowd P9-1.
Recommend using test pad on P10-1.
Dispenser Solenoid
260
Ω
- 300
Ω
120V, 60 Hz, 17W Electronic Control
Triac
Electronic Control
Sensor
Input
Switch closes momentarily
and then reopens as the diverter
reaches each potential diverter position.
Diverter
Position
Switch
Electronic Control
No test pad on P11-3.
Recommend using test pad on P11-2.
P11-4
P11-3
P11-2
5V
N.O.
Diverter Sensor
Diverter Motor
L1
BK
P4-2 P7-4
P10-1
P7-6 P4-1
N
WH BU BU
Pin 3
Pin 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
No test pad on P7-4.
Recommend using test pad on P10-1.
Electronic
Control
Triac
Dispenser Valve Motor
1,300
Ω
- 1,600
Ω
120V, 60 Hz, 3W
L1
Regeneration Valve
BK
P4-2 P7-3
P10-1
P7-1
P4-1
N
WH
V V
Use top hole of jumper
W2 as test point for F9.
K2
Pilot L1 Relay
(Also see Door
Switch Circuit)
Fuse
F9
Pin 1
Pin 3
N.O.
Electronic Control
Electronic
Control
Triac
No test pad on P7-3.
Recommend using test pad on P10-1.
Regeneration Valve
890
Ω
- 1,090
Ω
120V, 60 Hz, 6W
Electronic Control
P11-2 P11-1
RD RD
(RD)
N.O.
N.O.
5V
(Optional Flowmeter)
Sensor
Input
(Closed when salt low)
Salt Level Reed Switch
39 K
Ω
Salt Level Sensing
Pin 1
Pin 1
Pin 4
Pin 2
Pin 3
Pin 3
Electronic
Control
(RD)
RD
RD
RD
RD
RD
WH
Lower Spray Arm Motor
K2
Pilot L1 Relay
(also see Door
Switch Circuit)
Electronic Control
No test pad on P8-3. Recommend using
test pad on P10-1.
(BU stripe
on plug)
(BU stripe
on plug)
(BU stripe
on plug)
Spray Arm Motor
1,890 - 2,310
Ω
each coil
120 V, 60 Hz, 6 Watts
Controlled Lower Spray Arm Sensor
P1A-17
P1A-19
P1A-20
RD
L1
BK
P4-2 P10-1
P10-3
P4-1
BR BR WH
N
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
(Red stripe
on plug)
(Red stripe
on plug)
Pin 5
Pin 1
Vent Wax Motor
600
Ω
- 1,800
Ω
120V, 60 Hz, 6W
Electronic Control
Electronic Control
(Red stripe
on plug)
(Red stripe
on plug)
P10-5
P10-4
P11-5
DC Ref
BR
BR
Pin 1 Pin 3
Fan Motor
31K
Ω
- 41K
Ω
5 VDC, 1W
Must measure resistance
with correct polarity and
disconnected from controls.
No test pad on P10-4.
Recommend using test pad on P11-5.
5V
_
+
Vent
Fan