Service Manual

3-14
n
27” Stacked Laundry Center
TESTING – WASHER
For Service Technician Use Only
TEST #6: Drain Pump
Perform the following checks if washer does not drain.
NOTE: Refer to Figure 1, “Drain Pump Strip Circuit” for tests
and measurements.
IMPORTANT: Drain water from tub before accessing boom of
washer.
1. Check for obstrucons in the usual areas. Clean and then
perform step 2.
2. Check the drain pump and electrical connecons by
performing the Drain Test under Manual Test Mode on
page 2-11. The following steps assume that this step was
unsuccessful.
3. Unplug washer/dryer or disconnect power.
4. Remove console to access main control.
5. Visually check that the J2 connector is inserted all the way
into the main control.
¾ If visual check passes, go to step 6.
¾ If connector is not inserted properly, reconnect J2 and
repeat step 2.
6. Remove connector J2 from main control. With an
ohmmeter, verify resistance values shown below across
the following J2 connector pinouts:
Component J2 Connector Pinout
Drain Pump J2, 2 & 3
Resistance should be 14–25 Ω.
¾ If values are open or out of range, check lower harness
connector, pin 7 & 6. If values are sll open or out of
range, go to step 7.
¾ If values are correct, go to step 11.
7. Tilt washer/dryer back to access drain pump. Verify pump
is free from obstrucons.
8. Visually check the electrical connecons at the drain
pump.
¾ If visual check passes, go to step 9.
¾ If connecons are loose, reconnect the electrical
connecons and repeat step 2.
9. With an ohmmeter, check harness for connuity between
the drain pump and main control. See chart below.
Main Control to Drain Pump
Drain pump Pin 1 to lower harness connector Pin 7 to main control J2-3
Drain pump Pin 2 to lower harness connector Pin 6 to main control J2-2
¾ If there is connuity, go to step 10.
¾ If there is no connuity, replace the lower or upper
washer harness (depending on where the issue was)
and repeat step 2.
10. With an ohmmeter, measure the resistance across the two
pump terminals. Resistance should be 14–25 Ω.
¾ If values are open or out of range, replace the pump
motor.
¾ If the resistance at the pump motor is correct, go to
step 11.
11. If there is a stuck pump, check for a blown board. If the
board has a blown R69 surge resistor, check for stuck or
shorted pump motor; if OK, check all other loads with
input to the board.
12. If the preceding steps did not correct the drain problem,
replace the main control.
a. Unplug washer/dryer or disconnect power.
b. Replace the main control.
c. Reassemble all parts and panels.
d. Plug in washer/dryer or reconnect power. Calibrate
washer and perform Automac Test to verify repair.
DRAIN PUMP
Figure 1
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.
3$*(
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
Figure 6 - Drain Pump Strip Circuit
Motor Resistance 14 to 25 ohms
Main Control Main Control
J2-3J5-2 J2-2Pin 1 Pin 2 J5-1
K2
120VAC
Motor
Drain Pump Motor Relay
Drain Pump Motor
N L1
K4
Main Relay
7. Verify there is no water, suds, or debris in
the hose or dome. Disconnect hose from main
control and blow into hose to clear water, suds,
or debris.
8. Check hose for leaks. Replace if needed.
9. Replace the main control and calibrate
washer. Perform Automatic Test to verify repair.
TEST #6: Drain Pump
Perform the following checks if washer does
not drain.
NOTE: Refer to Figure 6, “Drain Pump Strip
Circuit” for tests and measurements.
IMPORTANT: Drain water from tub before
accessing bottom of washer.
1. Check for obstructions in the usual areas.
Clean and then perform step 2.
2. Check the drain pump and electrical
connections by performing the Drain Test under
Manual Test Mode on page 9. The following
steps assume that this step was unsuccessful.
3. Unplug washer/dryer or disconnect power.
4. Remove console to access main control.
5. Visually check that the J2 connector is
inserted all the way into the main control.
¾
If visual check passes, go to step 6.
¾
If connector is not inserted properly,
reconnect J2 and repeat step 2.
6. Remove connector J2 from main control.
With an ohmmeter, verify resistance values
shown below across the following J2
connector pinouts:
Resistance should be 14–25 1.
¾
If values are open or out of range,
check lower harness connector, pin 7 & 6.
If values are still open or out of range, go
to step 7.
¾
If values are correct, go to step 11.
Component
Drain Pum
p
J2, 2 & 3
J2 Connector Pinout
7. Tilt washer/dryer back to access drain
pump. Verify pump is free from obstructions.
8. Visually check the electrical connections
at the drain pump.
¾
If visual check passes, go to step 9.
¾
If connections are loose, reconnect the
electrical connections and repeat step 2.
9. With an ohmmeter, check harness for
continuity between the drain pump and main
control. See chart below.
¾
If there is continuity, go to step 10.
¾
If there is no continuity, replace the lower
or upper washer harness (depending on
where the issue was) and repeat step 2.
10. With an ohmmeter, measure the resistance
across the two pump terminals. Resistance
should be 14–25 1.
¾
If values are open or out of range, replace
the pump motor.
¾
If the resistance at the pump motor is
correct, go to step 11.
11. If there is a stuck pump, check for a
blown board. If the board has a blown R69
surge resistor, check for stuck or shorted
pump motor; if OK, check all other loads
with input to the board.
12. If the preceding steps did not correct the
drain problem, replace the main control.
a. Unplug washer/dryer or disconnect power.
b. Replace the main control.
c. Reassemble all parts and panels.
d. Plug in washer/dryer or reconnect power.
Calibrate washer and perform Automatic Test
to verify repair.
Main Control to Drain Pum
p
Drain pump Pin 1 to lower harness connector Pin 7 to main control J2-3
Drain pump Pin 2 to lower harness connector Pin 6 to main control J2-2
Pin 7 Pin 6