KitchenAid KMTM704E Series User Manual

TESTING
KitchenAid 2015 Microltration Dishwashers
n
6-15
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.
Drain Motor
This test will check the wiring to the drain motor and the drain
motor itself. The following items are part of the drain motor
circuit.
n Harness/Connecon
n Drain Motor
n Control Board
Test Procedure
1. Verify that drain hose or drain path is not obstructed.
Check for blockage from sump check valve to customer’s
plumbing. Check for plugged garbage disposal or disposal
plug not knocked out. Check drain loop, stuck check valve,
or for plugged hoses. Repair as needed.
2. Check the drain motor and electrical connecons by
performing the Service Diagnosc Cycle. The following
steps assume that this step was unsuccessful.
Strip Circuit – Drain 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 drain motor. Go to step 4.
4. Unplug dishwasher or disconnect power.
5. Remove toe and access panels to access control board.
6. Unplug connector P6 from control board.
7. Check the drain motor—using an ohmmeter, measure the
resistance between P6-1 and P6-3.
¾ If the resistance is between 15-25 ohms, the drain
motor and harness are good. Go to step 8.
¾ If outside the range, replace the drain motor.
¾ If an open circuit is detected, check connecons and
harness connuity between control and drain motor. If
good, replace the drain motor.
8. Reconnect P6 to control board.
9. Set voltmeter to AC and connect leads to test-pads P10-
1 & P6-1 on the control board. Plug in dishwasher or
reconnect power.
10. Start the Diagnosc Cycle and at the proper interval
measure for AC out of the control between P10-1 & P6-1.
(Refer to Drain Motor Strip Circuit below.)
IMPORTANT: The Drain Motor must be connected to the
control board to measure voltage accurately!!!
¾ If no AC voltage is measured, replace the control board
and retest.
¾ If 120 VAC is measured and drain motor is running, go
to step 11.
11. Unplug dishwasher or disconnect power.
12. Reassemble all parts and panels.
13. Plug in dishwasher or reconnect power and run Diagnosc
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
WHBU
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
VV
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 usin
g
test
p
ad 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

KitchenAid KMTM704E Series Specifications

General

Brand	KitchenAid
Model	KMTM704E Series
Category	Dishwasher
Language	English