Whirlpool WFW94HEXR2 Manual page 17

FOR SERVICE TECHNICIAN'S USE ONLY
and 3. If the drum LED driver is working
properly, you should measure 150–370 mA.
 If the current is present, replace
the drum LED.
 If the current is not present, replace the UI.
10. Unplug washer or disconnect power.
11. Reassemble all parts and panels.
Water Level Controls
3 Water Inlet Valves – Test #6
3 Pressure Sensor/Switch – Test #7
3 Drain Pump – Test #8
3 Flow Meter – Test #9
TEST #6: Water Inlet Valves
This test checks the electrical connections
to the valves and the valves themselves.
1. Check the relays and electrical connections
to the valves by performing the "Quick Diagnostic
Test" on page 6. 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 machine
electronics.
c. Remove connector VCH7 from the CCU,
and if a steam model, connector VSF2. Refer
to CCU diagram on page 13.
d. Check harness connections to the
solenoid valves. Verify continuity in harness
between CCU and solenoid valves.
3. Check valve coil resistance at the valves,
or across the following VCH7 and VSF2
connector pinouts:
Valve
Cold Fill Valve
Hot Fill Valve
Steam Valve *
* Steam model only
Resistance should be 890–1.1k Ω.
 If resistance readings are outside the range
or open, replace the valve assembly.
 If resistance readings are within range,
reconnect VCH7 and, if applicable, VSF2
to CCU. Go to step 4.
DO NOT REMOVE OR
Pinout
VCH7, pins 1 & 3
VCH7, pins 5 & 7
VSF2, pins 1 & 3
DESTROY
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 "Quick
Diagnostic Test" and check for line voltage
across the pins of the valve. NOTE: Refer
to the "Quick Diagnostic Test" on page 6
to determine when the cold, hot, and steam
valves are actuated. (Example: Cold valve is
actuated during test phase C02.)
 If line voltage is present and valve still does
not activate, replace valve assembly.
 If line voltage is not present, replace the CCU.
6. Unplug washer or disconnect power.
7. Reassemble all parts and panels.
8. Perform the "Quick Diagnostic Test"
to verify repairs.
TEST #7: Pressure Sensor/Switch
Pressure Sensor (Steam Models)
This test checks the pressure sensor, CCU,
and wiring. NOTE: Usually, if the pressure
sensor malfunctions, the washer will generate
a long fill or long drain error.
1. Check the functionality of the pressure
sensor by running a small load cycle. The
valves should turn off automatically after
sensing the correct water level in the tub.
The following steps assume that this step
was unsuccessful.
Pressure Sensor
Harness Connector
Figure 7 - Pressure Sensor
2. Press START/PAUSE to stop the cycle and
then press POWER. The cycle will cancel and
drain the water from the tub.
3. Unplug washer or disconnect power.
Pressure Hose
Connector
PAGE 17