Test #7: Drain/Recirculation Pump - Whirlpool WFC8090GX Service Manual

WARNING
Electrical Shock Hazard
Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or
electrical shock.

TEST #7: Drain/Recirculation Pump

Perform the following checks if washer/dryer does not drain.
1. Check for obstructions in the usual areas. Clean and then
perform step 2.
2. Check the pump and electrical connections by performing
the Service Diagnostic Mode Tests on page 2-3. The following
procedures assume that this step was unsuccessful.
3. Unplug washer/dryer or disconnect power.
4. Gently lay washer/dryer on its right side to access the
ACU. Remove AC shield and ACU cover.
5. Visually check that the J4, J6, and/or J22 connector is
inserted all the way into the ACU. Lorem ipsum
¾ If visual check passes, go to step 6.
¾ If connectors are not inserted properly, reconnect J4,
J6, and/or J22 and repeat step 2.
6. Drain Pump: Remove connectors J4 and J6 from the ACU.
With an ohmmeter, measure the resistance across J4, pin
5 and J6, pin 2. (Continue to step 7.)
Recirculation Pump: Remove connector J22 from the
ACU. With an ohmmeter, measure the resistance across
J22, pin 1 and J22, pin 2. (Continue to step 7.)
7. Resistance should be: Drain Pump (45–65 Ω) and
Recirculation Pump (150–190 Ω) when at room temperature.
DRAIN/RECIRCULATION PUMP
DRAIN/RECIRCULATION PUMP
L1
RFI-L
J1-2
For Service Technician Use Only
ACU
J6-2
J22-1
Figure 2 - Drain/Recirculation Pump Strip Circuit
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 & recirculation
pump. Verify that pump, pump filter, drain hose, and air
trap are free from obstructions.
9. Visually check the electrical connections at the drain and
recirculation pumps.
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 pump assembly 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 drain and recirculation pump terminals. Resistance
should be: Drain Pump (45–65 Ω) and Recirculation Pump
(150–190 Ω).
¾ If the reading is far out of range or open, replace the
pump assembly.
¾ If the reading is correct, go to step 12.
12. If the preceding steps did not correct the drain or
recirculation problem, replace the ACU.
¾ Unplug washer/dryer or disconnect power.
¾ Replace the ACU.
¾ Reassemble all parts and panels.
¾ Perform the Service Diagnostic Mode Tests on page 2-3
to verify repair.
Recirculation
Pump
DRAIN PUMP
45-65 W
1 2
P
RECIRCULATION PUMP
150-190 W
1 2
P
Whirlpool Smart All-In-One Washer & Dryer
COMPONENT TESTING
Figure 1 - Drain/Recirculation Pump
ACU
J4-5
J22-2
Drain
Pump
Drain Filter
L2
RFI-N
J1-1
3-11
n