Whirlpool WTW7120HC Manual De Instrucciones página 19

TEST #8: Lid Lock
Perform the following checks if the washer does not lock (or unlock).
1. Check the lid lock by performing Lid Lock test under Service Load
Control Mode in Service Diagnostic
that this step was unsuccessful.
2. Unplug washer or disconnect power.
3. Remove console to access main control.
4. Visually check that the J6 connector is inserted all the way into the
main control.
➢ If visual check passes, go to step 5.
➢ If connector is not inserted properly, reconnect J6 and repeat step 1.
5. Check the lid lock motor winding and switches by removing J6 from the
main control and checking the resistance values shown in the following
table:
LID LOCK RESISTANCE
Component
Lock Switch
Solenoid
Lock Switch
Unlocked = Open
Lid Open = Open
Lid Switch
➢ If resistance values are good, go to step 6.
➢ If switch measurements do not match the values shown in the table for
unlocked (or locked) condition, a problem exists in the lid lock. Replace
the lid lock mechanism.
NOTE: Ensure that the protective corrugated tubing passes through
the hole in the top and that the push mount clip is connected to the top
from below. Additionally, route the lid lock wires through the retaining
clips on the ACU.
6. If the preceding steps did not correct the lock problem, replace the main
control.
a. Unplug washer or disconnect power.
b. Replace the main control.
c. Reassemble all parts and panels.
d. Plug in washer or reconnect power. Perform Service Diagnostics to
verify repair.
TEST #9: Load and Go Detergent (Not on all models)
To test the bulk detergent dispenser, ensure that the drawer is filled with
detergent. The bulk sensor and bulk pump can be tested individually.
Bulk Sensor
1. Enter Service Mode and run the Sensor Feedback Detergent Level cycle.
Ensure that the drawer is fully inserted.
2. Ensure that the screen is outputting the detergent level percentage in the
drawer. NOTE: This output value may read slightly lower than it appears
in the drawer.
➢ The following procedures are asssuming the output value was not as
expected.
3. Unplug washer or disconnect power.
4. Remove console to access main control.
5. Visually check that the J9 connector is inserted all the way into the
main control.
➢ If visual check passes, go to step 6.
➢ If connector is not inserted properly, reconnect J9 and repeat step 1.
6. Plug in washer or resconnect power.
7. Verify input DC voltage and analog output DC voltage of the bulk sensor
as per the following table:
DO NOT REMOVE OR DESTROY
FOR SERVICE TECHNICIAN'S USE ONLY
Mode. The following steps assume
Resistance Contacts Measured
50 - 160 Ω J6-2
Locked = 0 Ω
J6-1
J6-2
Circuit
Bulk Sensor Operating Voltage
Voltage (DC)
Input Voltage
Analog Output Voltage
8. If the analog output voltage of the bulk sensor is out of range, replace
the bulk sensor component. Otherwise, proceed to step 9.
a. Unplug washer or disconnect power.
b. Replace the bulk sensor component.
c. Reassemble all parts and panels.
d. Plug in washer or reconnect power. Perform Sensor Feedback
Detergent Level and Component Activation Detergent Pump
9. If the input voltage of the bulk sensor is out of range, replace the main
control.
a. Unplug washer or disconnect power.
b. Replace the main control.
c. Reassemble all parts and panels.
J6-3
d. Plug in washer or reconnect power. Perform Sensor Feedback
Detergent Level and Component Activation Detergent Pump.
J6-2
Bulk Detergent Pump
1. Enter Service Mode and run the Component Activation Detergent Pump
J6-1
cycle.
2. Ensure that detergent is dispensed into the basket.
➢ The following procedures are assuming the output was not as expected.
3. Unplug washer or disconnect power.
4. Remove console to access main control.
5. Visually check that the J17 connector is inserted all the way into the
main control.
➢ If visual check passes, go to step 6.
➢ If connector is not inserted properly, reconnect J17 and repeat step 1.
6. Visually check the bulk pump extension harness is connected to the
bulk pump connector that is protruding through the top.
➢ If visual check passes, go to step 7.
➢ If not, repair or replace as needed.
7. Check continuity of the bulk pump extension harness.
➢ If the continuity test passes, go to step 8.
➢ If not, repair or replace as needed.
8. Remove connector J17 from main control. With an ohmmeter, verify
resistance values shown below across the following J17 connector
pinouts:
Component
Bulk Pump
➢ If values are open or out of range, go to step 9, replace the Bulk Pump
component, otherwise go to step 9.
a. Unplug washer or disconnect power.
b. Replace the bulk sensor component.
c. Reassemble all parts and panels.
d. Plug in washer or reconnect power. Perform Sensor Feedback.
Detergent Level and Component Activation Bulk Pump.
9. If the preceding steps did not correct the bulk detergent problem,
replace the main control.
a. Unplug washer or disconnect power.
b. Replace the main control.
c. Reassemble all parts and panels.
d. Plug in washer or reconnect power. Perform Sensor Feedback
Detergent Level and Component Activation Bulk Pump.
Range Contacts Measured
4.75 - 15.25 VDC J9-1
1.4 - 3.10 VDC J9-2
J17 Pinout Resistance
J17, pins 2 - 3 16 - 19 Ω
J9-4
J9-4
19