PAGE 12
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
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 plastic
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 connections to the
interference filter are securely connected.
4.
Visually check that all connections to the
CCU and Expansion Board (EB) are fully inserted.
5.
If both visual checks pass, go to step 6.
DL3
-Door Lock Coil
t
= pin-1
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 11.
If line voltage is present, go to step 8.
If line voltage is not present, verify the
continuity of the power cord. If it fails the
continuity 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 11.
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 connections between the
filter and the CCU. Repair as necessary.
DI6
-Detergent Dispenser Motor
FM3
-Flow Meter
DCS3
-Door Closed Switch
PS8
-Pressure Sensor
SET2
-Temperature
Sensor
UP3
-Expansion
Brd Power
UI7
-User Interface
MI3
-MCU
Communications
FAC3
-Wide
to Expansion Brd
DP2
-Drain Pump
RP2
-Vent Fan
VCH7
-Hot/Cold Valves
VFS2
-Steam Valve
MS2
-MCU Power
IF2
-Interference
Filter
DLS2
-Door
Lock Switch
HE2
-Heater
Element
HSG2
-Expansion
Board
Figure 10 - Cycle Control Unit (CCU)
Figure 11 - Interference Filter
Filter Output - Line
Filter Input - Line (Power Cord)
Filter Input - Neutral (Power Cord)
Filter Output - Neutral
