Diverter Motor - KitchenAid KMTM704E Series Technical Education

TESTING
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
Drain
death or electrical shock.

Diverter Motor

This test will check the wiring to the diverter motor and the
diverter motor itself. The following items are part of the
diverter motor circuit.
n Harness/Connection
n Diverter Motor
n Diverter Position Switch (see test on following page)
n Control Board
Dispenser (Detergent and Rinse Aid)
Test Procedure
1. Check for operation in Diagnostic Cycle. Listen for cam
clicking as it rotates—or inspect shaft with mirror to see
it rotating during diverter interval. If diverter is rotating,
the likely problem is with the diverter sensor (see test
procedure on following page). Verify that diverter disk is
properly installed on shaft.
2. 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 diverter valve. Go to step 3.
Strip Circuit – Diverter Motor
Diverter Valve
Diverter Motor
L1
BK
P4-2
KitchenAid 2015 Microfiltration Dishwashers
n
6-12
Water Softener
Regeneration Valve
L1
For Service Technician Use Only
L1
L1
Use top hole of jumper
W2 as test point for F9.
N.O.
K2
Pilot L1 Relay
Fuse
(Also see Door
F9
Switch Circuit)
Electronic Control
No test pad on P7-4.
Recommend using test pad on P10-1.
3. Unplug dishwasher or disconnect power.
4. Remove toe and access panels to access control board.
5. Unplug connector P7 from control board.
6. Check the diverter motor—using an ohmmeter, measure
the resistance between P7-4 and P7-6.
¾ If the resistance is between 1300-1600 ohms, the
diverter motor and harness are good. Go to step 7.
¾ If outside the range, replace the diverter assembly.
¾ If an open circuit is detected, check connections and
harness continuity between control and diverter
assembly. If good, replace the diverter assembly.
7. Reconnect P7 to control board.
8. Set voltmeter to AC and connect leads to test-pads P10-
1 & P7-6 on the control board. Plug in dishwasher or
reconnect power.
9. Start the Diagnostic Cycle and at the proper interval
measure for AC out of the control between P10-1 & P7-6.
(Refer to Diverter Motor Strip Circuit below.)
IMPORTANT: The Diverter Motor must be connected to
the control board to measure voltage accurately!!!
BK
¾ If no AC voltage is measured, replace the control board
P4-2
and retest.
¾ If 120 VAC is measured and diverter is rotating, go to
step 10.
10. Perform Diagnostic Cycle to verify repair.
¾ If diverter error still exists, perform diverter sensor test
procedure on following page.
11. Unplug dishwasher or disconnect power.
12. Reassemble all parts and panels.
13. Plug in dishwasher or reconnect power.
BK
P4-2
Test pad on P9-3 might crowd P9-1.
Recommend using test pad on P10-1.
BU
P7-4
Pin 3
Pin 1
P10-1
Dispenser Valve Motor
1,300Ω - 1,600Ω
120V, 60 Hz, 3W
Use top hole of jumper
W2 as test point for F9.
N.O.
K2
Pilot L1 Relay
Fuse
(Also see Door
F9
Switch Circuit)
Electronic Control
No test pad on P6-3.
Recommend using test pad on P10-1.
Electronic Control
Use top hole of jumper
W2 as test point for F9.
N.O.
K2
Pilot L1 Relay
Fuse
(also see Door
F9
Switch Circuit)
BU WH
P4-1
P7-6
Triac
Electronic
Control
BR
P6-3
Pin 1
P10-1
Drain Motor
15Ω - 25Ω
120V, 60 Hz, 4
Dispenser Wax Mo
1.4KΩ - 2.8KΩ
120V, 60 Hz, 10W
Pin 1
V
P9-3
Pin 1
Dispenser Solen
P10-1
260Ω - 300Ω
120V, 60 Hz, 17
Diverter Senso
N
Sensor
Input
Electronic Con
Switch closes m
and then reope
reaches each p
Salt Le