For Service Technician Use Only
COMPONENT TESTING (Cont.)
3-18
n
Whirlpool
®
and KitchenAid
®
Filtration and Maytag
®
24" Microfiltration Dishwashers
Global Wash Motor SSM
This test will check the wiring to the wash motor and the wash
motor itself. The following items are part of the wash motor
circuit:
n
Harness/Connection
n
Wash Motor
n
Control Board
n
Wash Motor Fuse (Some Models)
Test Procedure
1.
Check the tube and sump for anything that may be impeding
water flow. Inspect and if necessary clean the coarse-filter
system. Also inspect spray arm and nozzle and clean if
needed.
2.
Check the wash motor and electrical connections by
performing the Service Diagnostics Cycle. The following steps
assume that this step was unsuccessful.
3.
Unplug power or disconnect dishwasher.
Strip Circuit - Single Speed Wash Motor
4.
Remove toe and outer door panels to access control board.
5.
Unplug connector P5 from control board.
6.
Check the wash motor using an ohmmeter, measure the
resistance between P5-1 and P5-2.
¾
If the resistance is between 7-12 ohms, the wash motor
and harness are good. Go to step 7.
¾
If outside the range, replace the wash motor.
¾
If an open circuit is detected, check connections and
harness continuity between control and wash motor. If
good, replace the wash motor.
7.
Check the wash motor fuse (some models). Using an
ohmmeter, measure the resistance between P5-1 and P5-4.
¾
If the resistance is less than 3 ohms, fuse is good. Go to
step 8.
¾
If the resistance is greater than 3 ohms, replace the
control.
8.
Reconnect P5 to control board.
9.
Set voltmeter to AC and connect leads to test-pads
P5- 1 and P5-2 on the control board. Plug in dishwasher or
reconnect power.
10.
Start the Diagnostics Cycle and at the proper interval
measure for AC out of the control board between P5-1 and
P5-2 (Refer to Wash Motor Strip Circuit below).
¾
If no AC voltage is measured, replace the control board
and retest.
¾
If 120 VAC is measured and wash motor is running, go to
step 11.
¾
If 120 VAC is measured and wash motor is not running, go
to step 9.
11.
Unplug dishwasher or disconnect power.
12.
Reassemble all parts and panels.
13.
Plug in dishwasher or reconnect power and run Diagnostics
Cycle to verify repair.
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.
L1
BK
P4-1
P5-1
TURQ
(LBU)
WH
N
N.O.
K503
Pilot L1 Relay
(Also see Door
Switch Circuit)
Fuse F501
Electronic Control
Pin 2
Pin 3
(Some Models)
TURQ
(LBU)
1-PH SYNC
WASH
MOTOR
PUMP
120 V / 60 Hz
26 - 36 W
7.5 - 9 Ω at 25°C
K502
Motor N Relay
(Also see Door
Switch Circuit)
P5-2
P4-4
Sense Resistor
or Jumper
0
Ω
Electronic Control
N.O.
Содержание M-17
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