Whirlpool WFW3090GW, Руководство по обслуживанию

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COMPONENT TESTING
Whirlpool Compact Front Load Washer
n
3-13
For Service Technician Use Only
TEST #8: Heater Element
This test checks the heating element, wiring, and ACU.
1. Unplug washer or disconnect power.
2. Gently lay washer on its right side to access the ACU.
3. Disconnect connector
J41 from the ACU.
4. Using an ohmmeter, measure the resistance across pins 1
and 2 of connector J41 .
¾
If the resistance is 7–30 Ω, the heating element and
wiring are good; go to step 8.
¾
If the resistance is open, go to step 5.
5. Remove back panel to access the heating element.
6. Disconnect the wire connectors from the heating element.
See Figure 8.
7. Using an ohmmeter, measure the resistance across the
two heating element terminals.
¾
If the resistance is 7–30 Ω, the heating element is good;
replace the lower main harness.
¾
If the resistance is open, replace the heating element.
Figure 3 - Heating Element Strip Circuit
WARNING
Electrical Shock Hazard
Disconnect power before servicing.
Failure to do so can result in death or
electrical shock.
Replace all parts and panels before operating.
Figure 1 - Heater Element
8. If the preceding steps did not correct the heating element
problem, replace the ACU.
¾
Unplug washer or disconnect power.
¾
Replace the ACU.
¾
Reassemble all parts and panels.
¾
Perform the Service Test Cycle on pages 2-4 and 2-5 to
verify repair.
3$*(
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DES TROY
4. Gently lay washer on its right side
to access the ACU.
5. Visually check that the J15 connector
is inserted all the way into the ACU.
¾
If visual check passes, go to step 6.
¾
If connector is not inserted properly,
reconnect J15 and repeat step 2.
6. Remove connector J15 from the ACU.
With an ohmmeter, measure the resistance
across pins 5 and 6.
7. Resistance should be 20–30
Ω
when the pump is at room temperature.
¾
If the reading is infinite (open), go to step 8.
¾
If the reading is correct, go to step 12.
8. Remove the rear panel to access drain
pump. Verify that pump, pump filter, drain
hose, and air trap are free from obstructions.
9. Visually check the electrical connections
at the drain pump.
¾
If visual check passes, go to step 10.
¾
If connections are loose, reconnect the
electrical connections and repeat step 2.
10. With an ohmmeter, check harness for
continuity between the drain pump and ACU.
¾
If there is continuity, go to step 11.
¾
If there is no continuity, replace the lower
machine harness and repeat step 2.
11. With an ohmmeter, measure the resistance
across the two pump terminals. Resistance
should be 20–30
Ω
.
¾
If the reading is infinite (open), replace the
drain pump assembly.
¾
If the reading is correct, go to step 12.
Figure 7 - Drain Pump Assembly
12. If the preceding steps did not correct the
drain problem, replace the ACU.
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 Temperature Controls
✓
Heating Element – Test #8
✓
Temperature Sensor – Test #9
TEST #8: Heating Element
This test checks the heating element, wiring,
and ACU.
1. Unplug washer or disconnect power.
2. Gently lay washer on its right side
to access the ACU.
3. Disconnect connector J41 from the ACU.
4. Using an ohmmeter, measure the resistance
across pins 1 and 2 of connector J41.
¾
If the resistance is 7-30
Ω
, the heating
element and wiring are good; go to step 8.
¾
If the resistance is open, go to step 5.
5. Remove back panel to access the heating
element.
6. Disconnect the wire connectors from the
heating element. See Figure 8.
7. Using an ohmmeter, measure the resistance
across the two heating element terminals.
¾
If the resistance is 7-30
Ω
, the heating
element is good; replace the lower main
harness.
¾
If the resistance is open, replace the
heating element.
Drain pump
connector
Temperature Sensor
Figure 8 - Heater/Temperature Sensor Assembly
Heater Terminal Heater Terminal
Assembly Removal Nut
HEATING ELEMENT
ACU
HEATING ELEMENT
ACU
HEATING ELEMENT
L1
IF-2
N
IF-1
J41-2 J41-1
L1 - HEATER RELAY N - HEATER RELAY
H
7 - 30 ohms
3$*(
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 ACU connector.
TEST #1: ACU Power Check
This test checks for incoming and outgoing power
to and from Appliance Control Unit (ACU). This test
assumes that proper voltage is present at the outlet.
1. Unplug washer or disconnect power.
2. Gently lay washer on its right side
to access the ACU.
3. Visually check that all connections to the
interference filter (IF) are securely connected.
See Figure 2, below.
4. Visually check that all connections to the
ACU are fully inserted. See Figure 3, below.
5. If both visual checks pass, go to step 6.
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 2.
¾
If line voltage is present, go to step 8.
¾
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 2.
¾
If line voltage is present, go to step 9.
¾
If line voltage is not present, replace the
interference filter.
9. With a voltmeter set to AC, check for input
line voltage to the ACU across pins 1 and 2
of connector J42 AC Input (IF). See Figure 3.
¾
If line voltage is present, go to step 10.
¾
If line voltage is not present, check
harnesses and connections between the
filter and the ACU. Visually inspect inside
connector housing for bent or damaged
terminals. Repair as necessary.
Figure 3 - Appliance Control Unit (ACU)
Figure 2 - Interference Filter (IF)
Filter Output - Line (BU)
Filter Input - Power Cord Line (BK) Filter Input - Power Cord Neutral (WT)
Filter Output - Neutral (BU)
J15-Inlet Valve
(1,2,3)
Drain Pump
(5,6)
1
2
3
5
6
WV-DP
1
2
3
MOT
J36-Motor
1
2
HE
J41-Heater
1
2
IF
J42-AC Input
1
2
3
DSS
J43-Door Lock/
Switch
J21-User
Interface
(CUIO)
(12,11,10,9)
APS
(7,6,5)
12
11
10
9
7
6
5
SB-PRS-UI
3
4
AQS-NTC
J23-NTC
(3,4)
Heater Connector on ACU
Figure 2 - Heater Connector Location on ACU