Whirlpool WFW3090GW, Service Manual, Page: 40 / 70

3-10
n
Whirlpool Compact Front Load Washer
TESTING COMPONENT
For Service Technician Use Only
TEST #5: Water Inlet Valve
This test checks the electrical connections to the valve and the
valve itself. The valve is a double valve consisting of a prewash
valve and a main wash valve.
1. Check the relays and electrical connections to the valve by
performing the Service Test Cycle on pages 2-4 and 2-5.
The following steps assume one or more of the valves did
not turn on.
2. For the valve(s) in question, check the individual solenoid
coils:
a. Unplug washer or disconnect power.
b. Remove top panel to access the inlet valve, and then
gently lay washer on its right side to access the ACU.
c. Remove connector J15 from the ACU. Refer to ACU
diagram on page 3-5.
d. Check harness connections to the solenoid valves.
Verify continuity in harness between ACU and solenoid
valves.
3. Check valve coil resistance at the valve, or across the
following connector pinouts:
Valve Pinout
Prewash Valve J15, pins 1 & 2
Main Wash Valve J15, pins 1 & 3
Resistance should be 890Ω–1.1k Ω.
¾
If resistance readings are outside the range or open,
replace the valve assembly.
¾
If resistance readings are within range, reconnect J15 .
Go to step 4.
4. With a voltmeter set to AC , attach the leads across the
pins of the suspect valve (see chart in step 3). Plug in
washer or reconnect power.
5. Run the Service Test Cycle and check for line voltage
across the pins of the valve. NOTE : Refer to the Service
Test Cycle on pages 2-4 and 2-5 to determine when the
prewash valve and main wash valve are actuated.
¾
If line voltage is present and valve still does not
activate, replace valve assembly.
¾
If line voltage is not present, replace the ACU.
6. Unplug washer or disconnect power.
7. Reassemble all parts and panels.
8. Perform the Service Test Cycle on pages 2-4 and 2-5 to
verify repairs.
3$*(
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DES TROY
5. Disconnect the J43 connector from the
ACU. NOTE: To measure the door lock switch
in the “locked” position, plug in washer or
reconnect power. Press the POWER button,
select any cycle, and then press START.
Actuation of the door lock solenoid should be
heard. At that point, unplug the washer and
disconnect J43 from the ACU and measure
resistance across pins 2 & 3 (ACU side).
Resistance should measure according to the
following chart:
¾
If resistance values are good, go to step 6.
¾
If any of the measurements are out of
range, check the harness of the suspected
component between the ACU and door lock
mechanism for continuity.
¾
If the harness and connections are
good, replace the door lock mechanism.
IMPORTANT: To minimize risk of damage
to door lock/switch wires, remove the door
lock mechanism screws before removing
the front panel.
6. If the preceding steps did not correct the
lock problem, replace the ACU and retest door
lock mechanism.
¾
Unplug washer or disconnect power.
¾
Replace the ACU.
¾
Reassemble all parts and panels.
¾
Perform the Service Test Cycle
on page 5 to verify repair.
Water Level Controls
✓
Water Inlet Valve – Test #5
✓
Water Level Sensor – Test #6
✓
Drain Pump – Test #7
TEST #5: Water Inlet Valve
This test checks the electrical connections
to the valve and the valve itself. The valve is
a double valve consisting of a prewash valve
and a main wash valve.
Figure 5 - Water Inlet Valve
1. Check the relays and electrical connections
to the valve by performing the Service Test Cycle
on page 5. The following steps assume
one or more of the valves did not turn on.
2. For the valve(s) in question, check the
individual solenoid coils:
a. Unplug washer or disconnect power.
b. Remove top panel to access the inlet
valve, and then gently lay washer on its right
side to access the ACU.
c. Remove connector J15 from the ACU.
Refer to ACU diagram on page 16.
d. Check harness connections to the
solenoid valves. Verify continuity in harness
between ACU and solenoid valves.
3. Check valve coil resistance at the valve,
or across the following connector pinouts:
Resistance should be 890
Ω
–1.1k
Ω
.
¾
If resistance readings are outside the range
or open, replace the valve assembly.
¾
If resistance readings are within range,
reconnect J15. Go to step 4.
4. Plug in washer or reconnect power.
5. With a voltmeter set to AC, attach the
leads across the pins of the suspect valve
(see chart in step 3). Run the Service Test
Cycle and check for line voltage across the
pins of the valve. NOTE: Refer to the Service
Test Cycle on page 5 to determine when
the prewash valve and main wash valve
are actuated.
¾
If line voltage is present and valve still
does not activate, replace valve assembly.
¾
If line voltage is not present,
replace the ACU.
Valve Pinout
Prewash Valve J15, pins 1 & 2
Main Wash Valve J15, pins 1 & 3
Component Contacts Measured
Door Lock
Solenoid
J43-1
Door
Switch
Resistance
60–90 ohms
(Door must
be closed)
J43-2
Door Open =
Open Circuit
Door Closed =
60–90 ohms
J43-1 J43-2
Lock
Switch
Locked =
0 ohms
Unlocked =
Open circuit
J43-2 J43-3
Figure 2 - Water Inlet Valve Strip Circuit
WATER INLET VALVE ASSEMBLY
L1 ACU N
890 - 1.1K Ohms
DOUBLE VALVE
WATER VALVES
IF-2 J15-1
ACU
IF-1
J15-2
PREWASH
MAIN WASH
J15-3
RELAY
Figure 1 - Double Valve Assembly
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.