PAGE 15
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DES
TROY
If any of the measurements do not match the
values shown in the chart, check the harness
of the suspected component between the
CCU and door lock mechanism for continuity.
If the harness and connections are
good, replace the door lock mechanism.
NOTE:
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 CCU and retest door
lock mechanism.
Unplug washer or disconnect power.
Replace the CCU.
Reassemble all parts and panels.
Perform the “Quick Diagnostic Test”
on pages 4–5 to verify repair.
TEST #5: Drum Light
This test is performed if the drum LED does
not light.
1.
Press and hold the EcoBoost/Drum Light
button on the console until the LCD screen
acknowledges the drum light is on.
If the LCD does not confirm the button
press, replace the UI.
If the LCD confirms the button press,
go to step 2.
2.
Unplug washer or disconnect power.
3.
Remove the top panel to access CCU
and user interface (UI).
4.
Verify the drum light connector (
P13
)
is securely connected to the UI.
5.
Check harness and connections between
the drum light and the UI.
If the connections are OK, go to step 6.
If not, repair or replace as needed.
6.
Unplug the drum light connector (
P13
)
from the UI.
7.
Plug in washer or reconnect power.
8.
Press and hold the EcoBoost/Drum
Light button on the console until the LCD
acknowledges the drum light is on.
9.
With a multimeter set to milliamps, measure
the current across UI connector
P13
, pins 1
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
Water Inlet Valves – Test #6
Pressure Sensor – Test #7
Drain Pump – Test #8
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 pages 4–5. 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 machine
electronics.
c.
Remove connectors
VCH7
and
VSF2
from
the CCU. Refer to CCU diagram on page 12.
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 pin-outs:
Resistance should be ~990
Ω
.
If resistance readings are tens of ohms outside
the value or open, replace the valve assembly.
If resistance readings are within range,
reconnect
VCH7
and
VSF2
to CCU and go
to step 4.
Valve
Pinout
Cold Fill Valve
VCH7, pins 1 & 2
Hot Fill Valve
VCH7, pins 3 & 4
Steam Valve
VSF2, pins 1 & 2
