Test Procedures - Whirlpool WFW94HEX Technical Education

COMPONENT TESTING (continued)
FOR SERVICE TECHNICIAN'S USE ONLY

TEST PROCEDURES

IMPORTANT: The following procedures
may require the use of needle probes
to measure voltage. Failure to use needle
probes will damage the connectors. To
ease the process of measuring voltage
and resistance, test points for each pin are
accessible through the slots in the plas�c
beneath each CCU connector.
TEST #1: Cycle Control Unit/Power Check
This test checks for incoming and outgoing power
to and from Cycle Control Unit (CCU). This test
assumes that proper voltage is present at the outlet.
1. Unplug washer or disconnect power.
2. Remove top panel to access the
machine electronics.
3. Visually check that all connec�ons to the
interference filter are securely connected.
4. Visually check that all connec�ons to the
CCU are fully inserted.
5. If both visual checks pass, go to step 6.
DI6-Detergent Dispenser Motor
FM3-Flow Meter (steam model)
DCS3-Door Closed Switch
PS8 -Pressure
Sensor/Switch
SET2-Temperature
Sensor
UI7-User Interface
MI3-MCU
Communica�ons
Figure 2 - Cycle Control Unit (CCU)
Filter Output - Line
Filter Input - Line (Power Cord)
Figure 3 - Interference Filter
DL3-Door Lock Coil
5-7
6. Plug in washer or reconnect power.
7. With a voltmeter set to AC, check for line
voltage at the input of the interference filter.
See Figure 3.
� If line voltage is present, go to step 8.
� If line voltage is not present, verify the
con�nuity of the power cord. If it fails the
con�nuity check, replace the power cord.
8. With a voltmeter set to AC, check for line
voltage at the output of the interference filter.
See Figure 3.
� If line voltage is present, go to step 9.
� If line voltage is not present, replace the
interference filter.
9. With a voltmeter set to AC, check for input
line voltage to the CCU across pins 1 and 2 of
connector IF2 .
� If line voltage is present, go to step 10.
� If line voltage is not present, check
harnesses and connec�ons between the
filter and the CCU. Repair as necessary.
DP2-Drain Pump
RP2-Vent Fan
VCH7-Hot/Cold Valves
VFS2-Steam Valve (steam model)
Filter Output - Neutral
Filter Input - Neutral (Power Cord)
MS2-MCU Power
IF2-Interference
Filter
DLS2 -Door
Lock Switch
HE2-Heater
Element
•
= pin-1